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Susitna-Watana Hydroelectric Project Document
ARLIS Uniform Cover Page
Title:
Susitna Project supplemental report, low Watana Dam RCC concept cost
evaluation : final
SuWa 216
Author(s) – Personal:
Author(s) – Corporate:
R & M Consultants, Inc. [and] Hatch Associates Consultants [and] Jack Linard Consulting
AEA-identified category, if specified:
AEA-identified series, if specified:
Series (ARLIS-assigned report number):
Susitna-Watana Hydroelectric Project document number 216
Existing numbers on document:
Published by:
[Anchorage, Alaska : Alaska Energy Authority, 2010]
Date published:
November 29, 2010
Published for:
Date or date range of report:
Volume and/or Part numbers:
Final or Draft status, as indicated:
Final
Document type:
Pagination:
iii, 21, [22], 61 p.
Related work(s):
Supplement to: Susitna RCC dam cost evaluation : final.
(SuWa 197)
Pages added/changed by ARLIS:
Notes:
From the Alaska Energy Authority's "Railbelt large hydro reports" webpage (June 16, 2014).
All reports in the Susitna-Watana Hydroelectric Project Document series include an ARLIS-
produced cover page and an ARLIS-assigned number for uniformity and citability. All reports
are posted online at http://www.arlis.org/resources/susitna-watana/
Susitna Project
Supplemental Report
Low Watana Dam RCC Concept Cost Evaluation
FINAL
November 29, 2010
Low Watana Gravity Dam – RCC Concept
Prepared by:
R&M Consultants
Hatch Associates Consultants
Jack Linard Consulting
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
Page i November 29, 2010
EXECUTIVE SUMMARY
At the time of the Susitna Project studies for the 1983 FERC License Application and 1985
amendment to the License Application, roller compacted concrete (RCC) technology was not
regarded as sufficiently developed to use in the construction of large dams. Over the past 30
years, however, roller compacted concrete has developed as a construction material for dams of
increasing size and techniques of material placement and composition of the RCC mix has been
refined with experience.
R&M Consultants study team (R&M) was engaged by the Alaska Energy Authority (AEA) to
develop a conceptual design and perform concept level cost estimates for a RCC dam at the
Watana site and Devil Canyon sites that were described in the R&M report dated November 16th,
2009. This is an addendum to that report and examines the Low Watana RCC dam options by
exploring the cost differential between an expandable option and a non-expandable option, and
gravity section vs. gravity arch. Additionally, the advantages and disadvantages of underground
vs. surface powerhouse are explored as well as simplified transportation options utilizing updated
information on railroad costs in conjunction with “rail only” surface transport to the project.
We have found no fatal flaw in Low Watana RCC Gravity Arch Dam or surface powerhouse
options, and initial estimates indicate that there may be significant potential savings, particularly
with the RCC dam arrangements. RCC dams have been constructed in cold climates and at
greater heights than the 700-feet of Low Watana.
It is possible that developing the RCC concept to its final design configuration and moving
toward construction could result in development opportunities for basic industries in Alaska in
producing cement and exploitation of natural pozzolanic sources.
Access and logistical considerations including road, rail, and air transport are of concern at a
remote site such as the Susitna Project sites. Addition of unrestricted access to undeveloped areas
is often controversial. The access alternatives considered have assumed rail only access to the
project site.
The cost estimate summary, Table ES-1, presents the estimated construction costs of the options,
all of which consider surface powerhouses and “rail only” ground transportation.
Table ES-1 Summary of Cost of RCC Dams for the Susitna Project
Description
Low Watana
Embankment
Non-Expandable
$1,000 (1)
Low Watana
RCC
Non-
Expandable
$1,000
Low Watana
RCC
Expandable
$1,000
Low Watana
Gravity Arch
RCC
Non-
Expandable
$1,000
Construction Cost Total
(Millions of Dollars) $ 4,500 $ 3,900 $ 4,200 $ 3,600
(1) HDR 2009
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
Page ii November 29, 2010
Supplemental Report
Low Watana RCC Concept
November 29, 2010
Table of Contents
EXECUTIVE SUMMARY ............................................................................................................ i
Table of Contents ........................................................................................................................... ii
Figures ........................................................................................................................................... iii
Appendices .................................................................................................................................... iii
1.0 Introduction ......................................................................................................................... 1
2.0 Project Layout ..................................................................................................................... 1
2.1 General .................................................................................................................. 1
2.2 Alternatives ........................................................................................................... 2
2.3 Powerhouse Layout ............................................................................................... 3
2.3.1 Surface vs. Underground Powerhouses ..................................................... 4
2.3.2 Surface Powerhouse Configuration ........................................................... 5
2.4 Dam Design Considerations .................................................................................. 7
2.4.1 RCC Dam Design ...................................................................................... 7
2.4.2 Low Watana RCC Gravity Dam Expandable .......................................... 10
2.4.3 Low Watana RCC Gravity Dam Non-Expandable.................................. 12
2.4.4 Low Watana Gravity Arch ...................................................................... 12
3.0 Project Access Issues ......................................................................................................... 13
3.1 Previous Project Access Costs Comparisons ...................................................... 13
3.2 Rail Access .......................................................................................................... 14
3.3 Airstrip ................................................................................................................ 14
4.0 Cost Estimates ................................................................................................................... 15
4.1 RCC Costs ........................................................................................................... 15
4.1.1 RCC Unit Cost Analysis for Watana Dam .............................................. 15
4.1.2 Sizing of RCC Batching Plant ................................................................. 17
4.2 Camp Cost ........................................................................................................... 17
4.3 Project Access Cost ............................................................................................. 17
4.4 Cost Summary ..................................................................................................... 17
5.0 Project Schedule ................................................................................................................ 19
5.1 Dam ..................................................................................................................... 19
5.2 Powerhouse ......................................................................................................... 19
5.3 Combined Dam and Powerhouse Schedule ......................................................... 20
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
Page iii November 29, 2010
Figures
2.2-1 – Low Watana ICRD Expandable Plan
2.2-2 – Low Watana ICRD Expandable Section
2.2-3 – Low Watana ICRD Expandable Stage 2 Section
2.2-4 – Low Watana ICRD Power Facilities
2.4-1 – Low Watana RCC Expandable Plan
2.4-2 – Low Watana RCC Expandable Sections and Details
2.4-3 – Low Watana RCC Expandable Elevation Views
2.4-4 – Low Watana RCC Non-Expandable Plan and Detail View
2.4-5 – Low Watana RCC Non-Expandable Sections and Details
2.4-6 – Low Watana RCC Non-Expandable Elevation Views
2.4-7 – Low Watana RCC Non-Expandable Profile
2.4-8 – Low Watana RCC Non-Expandable Gravity Arch Plan
2.4-9 – Low Watana RCC Non-Expandable Gravity Arch Sections and Details
3.2-1 – Low Watana Rail Access
4.1-1 – Borrow Areas
Appendices
A – Breakdown of Unit Cost Analysis for RCC
B – Detailed Cost Estimate
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 1 Final
1.0 Introduction
R&M Consultants, Inc. (R&M) formed a team under the R&M/AEA term agreement that
includes Hatch Associates Consultants, Inc. (HACI) and Jack Linard Consulting
(R&M/HACI/JLC) to investigate the feasibility of Roller Compacted Concrete (RCC) technology
for the Susitna Project as an alternative to impervious core rockfill dam (ICRD) concepts that
were developed during the licensing studies which concluded in 1985. Additionally
R&M/HACI/JLC performed a review of regulatory and FERC licensing activities and timelines
for precursor activities to issuance of a FERC license, and developed and a licensing phase
strategy for the project. The results of those investigations were presented in the R&M report
dated November 16th 2009 (R&M 2009).
The investigation was amended to consider additional alternatives with potentially lower costs.
This document presents the results of the further investigations. It is an extension of the previous
R&M 2009 report. In an effort to keep the comparison valid, the costs are based on December
2008 USD and are presented in the same format and structure as in the R&M 2009 report. The
focus will be on a Low Watana option with the same general project size as described in recent
studies (HDR 2009). Concepts focus on RCC dam options exploring the cost differential between
an expandable option and a non-expandable option and straight gravity section dam vs. gravity
arch dam.
The advantages and disadvantages of underground vs. surface powerhouse are also considered.
Transportation options utilizing updated information on railroad costs are developed with the
alternative of “rail only” surface transport to the project. The cost estimate uses
equipment/material prices consistent with the previous Watana cost estimate currently available
from AEA.
2.0 Project Layout
2.1 General
The following assumptions and technical considerations were included in developing our
conceptual project layouts. Replacement of one dam design for another affects more than
just the dam. Many features of the project general arrangement may be affected by the
selection of dam type. In keeping with our understanding of the dam design and costing
task we have included the following considerations:
Hydrology and hydraulics;
o Assumed the same reservoir water levels as described for the Low Watana
ICRD option;
o Diversion scheme and tunnel capacities are different as the diversion scheme
employs a shorter tunnel due to the smaller footprint of an RCC dam and the
consequences of overtopping of RCC dams is lower than with ICRD;
o The spillway configuration is different than for the ICRD alternative
(eliminating the side channel spillway) and incorporating an overflow section
into the RCC dam. The spillway configuration requirement included initial
examination of energy dissipation and potential for scour and to reduce the
potential for total dissolved gas (TDG) production at the project. The hydraulic
capacity was taken to be the same as for the current ICRD configuration. The
RCC dam Spillway design is conceptual only at this phase without detailed
analysis, modeling and in depth review of energy dissipation of potential for
rock scour.
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 2 Final
The intake structure and water conveyance use similar invert elevations and
diameters as for the ICRD dam option;
The powerhouse layout uses the same equipment sizes at the same setting as for the
ICRD option;
Foundation Conditions and Excavation Depth: Foundation conditions and foundation
treatment, including the single line grout curtain, will be similar to those for the Full
Watana RCC dam concept, which were similar to treatment of the foundation below
the impervious core for the ICRD dam scheme;
Dam cross section design – RCC dams are designed to the same principles and
standards as concrete gravity dams. Design loadings and factors of safety are per
FERC guidelines, including; waves and freeboard, earthquake, ice and silt loads. The
principles used to develop the Full Watana RCC dam concept are the same as used
for the Low Watana RCC dam concept.
2.2 Alternatives
Several RCC alternatives were examined for comparison with previous ICRD expandable
and non-expandable Low Watana alternatives. To achieve this, we have focused on the
elements of the RCC dam alternative that differ from the existing ICRD alternative.
Elements that are similar will remain identical for both alternatives in order to achieve an
“apples to apples” comparison to the extent possible. The alternatives being compared to
the RCC schemes are the ICRD Low Watana Expandable (see Figure 2.2-1 through 2.2-
4) and the ICRD Low Watana Non-expandable.
The following alternatives are addressed in this report:
Low Watana RCC Gravity Dam Expandable;
Low Watana RCC Gravity Dam Non-Expandable;
Low Watana RCC Gravity Arch;
Additionally, there is a discussion of above ground vs. underground powerhouses for
these alternatives.
Major considerations are:
Dam layout (axis, gravity arch vs. gravity);
Intake (integral to the dam or separate, expansion to full height Watana);
Spillway sections that could be modified for the expanded option;
Powerhouse (location, surface vs. underground, expansion options).
Advantages of the RCC dam concept compared to ICRD include: a smaller footprint,
lower dam volume, integral spillway, considerably shorter diversion tunnels and no
vulnerability to overtopping. Table 2.2 shows a comparison summary of significant
features of each alternative.
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 3 Final
Table 2.2: Low Watana ICRD and RCC Alternatives Summary
Feature Description
Low Watana
Non-
Expandable
ICRD
Low
Watana
Expandable
ICRD
Low
Watana
RCC - Non-
Expandable
Low
Watana
RCC -
Expandable
Low
Watana
RCC
Gravity
Arch
Total Dam Fill Volume (cy) 22,000,000 32,000,000 7,600,000 7,600,000 6,000,000
Diversion Tunnel Diameter
(ft) 36 36 27 27 27
Average Diversion Tunnel
Length (ft) 3,700 3,700 2,000 2,200 2,000
Intake Area Excavation (cy) 1,970,000 1,970,000 270,000 760,000 270,000
Average Power Tunnel
Length (ft) 200 200 260 300 330
Average Pressure Tunnel
Length (ft) 400 400 550 1500 170
Tailrace Tunnel Length 1,500 1,500 N/A N/A N/A
Powerplant Concrete Volume
(cy) 40,400 60,600 62,500 83,000 62,500
Powerplant Excavation
Volume (cy) 242,000 363,000 1,500,000 2,200,000 1,500,000
Spillway Gates
(3) - 64' Tall x
44' Wide
Radial Gates
(3) - 64' Tall
x 44' Wide
Radial Gates
N/A N/A N/A
Spillway Chute Excavation
(cy) 2,960,000 2,960,000 N/A N/A N/A
Spillway Chute Conventional
Concrete (cy) 130,300 130,300 99,000 99,000 99,000
This study does not have the scope for an exhaustive exploration of layout options, so
some engineering judgment has been used to develop the configurations used for
comparison. We have selected a layout based on general comparisons to existing
projects. The Shasta project in California in particular is similar in size and layout to our
selected configuration for the RCC Gravity and Gravity Arch dam arrangements
(Kollgaard and Chadwick, 1988).
2.3 Powerhouse Layout
The powerhouse layout was examined to explore potential cost savings associated with
the smaller footprint of gravity or gravity arch dams and robust concrete construction
which allows configurations that would not be available with an ICRD dam.
A common reason for selecting an underground powerhouse is to take advantage of a
steep gradient of the river between the dam and the tailrace; however this is not the case
at the Watana Dam site. Another important consideration is to minimize the length of the
water passage. The smaller footprint of the RCC dam allows shorter water conveyances
as well as the option of intakes and water conveyance either through the dam, or in the
rock abutments. The geological conditions must be suitable for an underground
powerhouse, which they are at Watana. A surface powerhouse requires enough room to
place the powerhouse along the river without excessive excavation, which is also the
case. Our conclusion is that both an underground and surface powerhouse configuration
is feasible at the Watana site and the choice should be based on economics,
constructability and serviceability issues.
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 4 Final
2.3.1 Surface vs. Underground Powerhouses
The choice of a surface or underground powerhouse is largely dependent on the
project setting and site conditions. The following list compares the two options:
Typical surface powerhouse advantages are:
o Elimination of tailrace tunnel;
o No requirement for tailrace surge chamber;
o Less expensive excavation;
o Ventilation is easier;
o Less geotechnical exploration required (as less geotechnical risk to
cost and schedule).
Typical underground powerhouse advantages
o Location is more flexible;
o Shorter headrace tunnels with considerable reduction in length of
steel-lined high pressure conduits;
o Work area can be more easily separated from dam construction (two
separate construction areas and schedules);
o Powerhouse is not located in or near river bed materials;
o Exterior shell not needed (rock forms support);
o Protection against the elements (longer construction season);
o Turbine setting can be lower;
o Less concrete needed to control hydraulic uplift;
o Less maintenance required.
The 1982 Acres Feasibility report discusses the choice of an underground
powerhouse based on general assumptions of less costly installation for
underground installations, additional operational flexibility and climatic
considerations.
The 1985 Harza Ebasco FERC license application (Harza Ebasco 1885) includes
a comparison of an underground to a surface powerhouse by major civil
mechanical and electrical cost items where the surface powerhouse was shown to
be more expensive due to the far greater cost of the power tunnel/penstock (see
Table 2.3-1). The comparison in Table 2.3-1 is a simplified comparison and does
not include the costs associated with the powerhouse superstructure or the
considerable substructure required to insure that the powerhouse is stable against
hydraulic uplift.
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November 29, 2010 Page 5 Final
Table 2.3-1 Comparison of Surface to Underground Powerhouse (Harza Ebasco
Study 1985)
We have developed a potential project arrangement with a surface powerhouse (loosely
based on the Shasta Hydroelectric Plant layout, Development of Dam Engineering in the
United States, 1988) with an intake on the left abutment, transitioning to a tunnel. The
length of the water passage is similar to that of the Low Watana underground option
(Harza Ebasco 1985). The tailrace discharges directly into the Susitna River.
2.3.2 Surface Powerhouse Configuration
Considerations for the surface powerhouse include: setting of the units, elevation
of high tailwater to prevent powerhouse flooding, rock cover over the tunnels and
the need for steel lining, stability against hydraulic uplift, construction access,
cofferdamming and diversion requirements to accommodate dam, powerhouse
foundation, and tailrace channel. Costs of waterways (tunnels, shafts and
intakes) are not included in the cost account for powerhouse cost comparisons
but are in a separate cost account.
The conceptual layout of a surface powerhouse for the Low Watana RCC dam
alternative was selected for favorable hydraulic characteristics as well as for cost
effective excavation downstream of the proposed dam. The concrete volume for
the surface powerhouse is a volume sufficient to ensure that there would be
enough mass to prevent powerhouse floatation without installation of anchors.
The surface powerhouse is set on the south river bank (left bank) such that the
tailrace apron end sill is adjacent to the end sill of the spillway stilling basin, as
these two features are at the same elevation of 1450 ft. The tailrace end sill
apron creates a downstream control weir for the powerhouse, thus maintaining
minimum tailwater conditions. Several design considerations including;
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 6 Final
excavation volumes, effects of discharge on downstream hydraulics, and the
effect of spillway discharge on powerhouse operation, must be evaluated to
determine the optimum physical setting of the powerhouse. The surface
powerhouse for the low Watana RCC alternatives was set to be offset 27 degrees
from the stilling basin, which is generally the expansion ratio of 2 longitudinal to
1 horizontal as defined by the USACE (HEC RAS v4.1 Reference Manual). This
alignment directs the Low Watana RCC dam surface powerhouse discharge
efficiently into the downstream river channel, noting that further downstream of
the dam the river bends to the north.
For this study, the dimensions of the surface powerhouse were set to
accommodate the same equipment layout proposed for the ICRD dam designs.
The transformers will be located within the surface powerhouse rather than in a
separate cavern as with the underground design. The surface alternative has the
transformer deck set above the draft tube outlets and their overall dimensions are
similar to those of the underground alternative. The entrance angle of penstocks
with respect to the surface powerhouse remains the same 62 degrees as with the
underground design.
The power intake (for the non-expandable and gravity arch RCC dam
alternatives) is integrated into the dam body and transitions into two concrete
lined tunnels that lead to vertical shafts and high pressure tunnels that bifurcate
and transition into steel lined penstocks that lead into the four Francis units in the
powerhouse. The intake invert and size for the RCC dam alternatives are
approximately the same as in the ICRD dam alternatives and the overall penstock
lengths are similar for the surface and underground alternatives. Although the
penstocks are somewhat longer in the surface alternative than in the underground
alternative, having sections of the power tunnels integral to the RCC dam may
reduce tunnel excavation/support, and concrete lining costs.
The significant cost advantage between the conceptual RCC surface powerhouse
and previously designed ICRD underground powerhouses is the elimination of
surge chambers, tailrace tunnels and access tunnels for the surface powerhouse
which are considered in the waterways cost account. Given the limited scope of
this study, the surface powerhouse was investigated to determine its feasibility
and provide an estimate of comparative costs. With this criteria, the surface
powerhouse does show to be a feasible alternative. However, the scope did not
include optimization of an underground design for the RCC designs. An
underground powerhouse with the RCC dam may have shorter pressure tunnels a
hydraulic transient analyses may demonstrate that surge chambers are not
required.
Further analyses should be performed to evaluate both surface and underground
layouts that will improve the configuration of the powerhouse, including;
optimizing unit settings considering concrete requirements and excavation costs,
optimizing high pressure and low pressure penstock lengths, as well as
optimizing the tailrace configuration. Additional study will be required to better
define hydraulic effects of the spillway discharge on powerhouse performance,
including physical model testing. Indications are that both surface and
underground powerhouse configurations are feasible for the Low Watana with an
RCC dam, and future analyses will need to be performed in order to determine
the optimum configuration.
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 7 Final
2.4 Dam Design Considerations
2.4.1 RCC Dam Design
The geotechnical information is typically the most influential element for
developing a dam design and the Watana site has well developed site
information. The RCC dam alternatives were developed on axes similar to that
of the ICRD dam axis. This is considered a conservative assumption, adopted to
provide a dam axis in the location with the maximum amount of existing
information on the foundation subsurface conditions, but not necessarily at the
most efficient location. It is possible or even likely that a more efficient dam axis
location could be found with further investigation.
The site has a foundation and abutments that are well suited to a concrete gravity
dam. Concrete gravity dams are relatively straight forward to design, and many
computer programs are available to improve the process of initial and final
design. The dam design can be initially developed using assumptions for
concrete strength based on similar mixes used on other projects. The final
configuration of the dam requires accurate material properties for the RCC
material that can only be determined by trial mix design using the actual selected
cement and pozzolan and the aggregate material available from the site.
Foundation treatment for all RCC dam options includes consolidation grouting
under the dam footprint and curtain grouting similar to that assumed in the
previous RCC dam study.
There is a buried channel north of the dam site which has been called the “Relict
Channel”. For the RCC alternatives, the treatment for the Relict Channel has
been taken to be identical as developed for the Low Watana non-expandable
ICRD.
It is important to note, particularly with regard to the comparison with the gravity
arch alternative that the Low Watana cross-section retains the 1H:1V
downstream slope established for the High Watana option (R&M 2009). This
face slope was considered to be on the conservative side for the high dam and is
even more so for the low dam option.
At this stage of proceedings, it is not appropriate to try to refine or optimize the
various elements of the different schemes, but it is important to bear in mind that
more detailed analyses may well change the relative ranking of project
alternatives. By the same token, more detailed analyses can only serve to ensure
that the eventually selected alternative will be more attractive than the
alternatives indicated herein because of the conservative approach adopted
throughout in these comparative studies.
A more conventional spillway option for a dam of this configuration and height
would be a smooth surfaced chute with forced air entrainment discharging back
into the river via a flip bucket into a plunge pool. Such an arrangement would
require the dam axis to be relocated to ensure that the jet from the flip bucket
impacts in the river with an alignment such that back scour is minimized. The
use of flip bucket and plunge pool may also result in hydraulic conditions that
could lead to high total dissolved gas (TDG). TDG occurs when air mixes with
water and goes into solution at depth, creating water supersaturated with air. If
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept
November 29, 2010 Page 8 Final
fish breathe supersaturated water, air can come out of solution in their blood
stream causing gas bubble disease, which can be fatal. The stepped spillway may
allow spill without a plunge to depth that could lead to excessive levels of TDG.
The design would look to dissipate as much energy as possible and create a
spillway that creates skimming flow downstream of the spillway. The present
work scope does not cover spillway and dam axis optimization and for that
reason, the stilling basin concept, which is compatible with the ICRD axis, has
been adopted for present reporting purposes.
The conceptual spillway for the RCC alternatives is incorporated in the dam
structure. The flood outflows are discharged through an ungated spillway into a
stepped, converging chute and terminating in a downstream stilling basin. As
discussed in the R&M 2009 Report, the stepped spillway is expected to provide
significant energy dissipation and to be compatible with the stilling basin
arrangement shown on the drawings. However, a stepped spillway of this size
exceeds precedent and details will have to be verified by comprehensive
hydraulic model studies.
An extensive study, including large scale physical models (not less than 1:40
scale) will be required prior to finalizing the details of spillway configuration.
The preliminary hydraulic calculations performed for a stepped spillway indicate
that it is a potentially cost effective configuration and should warrant further
consideration and analyses during future design studies. Modeling may well
show that the optimum stepped spillway and stilling basin is different to the
conceptual configuration, or that a different type of spillway may be required.
Any modifications may influence not only the spillway costs but also the
powerhouse costs as the layout may have to be reconfigured.
2.4.1.1 Steps for RCC Design
Development of the RCC dam design will require several steps,
comprised of:
Confirming design criteria, including loads and load
combinations, materials and foundation properties, minimum
factors of safety and allowable stresses;
Evaluation of site climatic conditions which have a major impact
on both construction programming and RCC mix design;
Performing preliminary design – determine required
performance, development of basic geometry, preliminary mix
design and strength requirements;
Performing three-dimensional finite element analysis (using
initial assumed material properties), including dynamic and
thermal stress analyses;
Locating and testing aggregate, cement and pozzolan sources
that will be used for construction;
Establish RCC placement temperature, maximum allowable
internal temperature and required temperature control measures;
and
Developing trial mixes for the full scale trial embankments
(FSTE) to fine tune the mix design.
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November 29, 2010 Page 9 Final
The trial mix program would be initially oriented towards:
Aggregate gradation optimization;
Selection of two preferred cement types and content;
Selection of two preferred pozzolan types and content; and
Selection of two preferred retarder types and content.
The minimum time from beginning the study of the prospective RCC to
confirmation of mix details is 16 months. Conservatively, it would be
appropriate to allow 18 months. At least 18 months is required to
investigate, select, procure, ship and set up the necessary equipment
(crushing plant, batching plant, conveyors). Most of this work is done
during the trial mix/FSTE phase and the end result is that the RCC
production facilities can be ready within 2 years of starting trial mixes.
An upper limit would be 2.5 years.
2.4.1.2 Seismic Design Consideration
The most important safety concern of concrete dams subjected to
earthquakes is excessive cracking, which can lead to potential instability
from sliding or overturning. Sliding could occur on an existing plane of
weakness in the dam foundation, at the foundation-dam interface or
within the dam. Although some major concrete dams have experienced
strong ground motion with some damage, it is of note that there has been
only one major concrete dam failure in recent times as a result of
earthquake induced ground motions. This failure was in Taiwan where
the dam was constructed literally over the top of an active fault. In
general, instability of gravity dams caused by excessive cracking of the
concrete is most likely to occur in the upper half of the dam.
The application of defensive design measures when designing a dam is
the most dependable approach to alleviate safety concerns. Defensive
measures for concrete dams include the following:
Adequate drainage is the first line of defense against
foundation instability, in part because it is the most
economical;
Designing RCC mixes and construction procedures to ensure
that direct tensile and shear strength parameters are always
achieved without excessive cement content in the mix.
(Increased cement will increase thermal stress problems,
which may be more of a concern than the seismic risks);
Use the best geometric design and structural detailing. The
dam should have minimum geometric irregularities and
gradual variations in structural stiffness. Examples of good
geometric design are curved transitions and minimal mass at
the crest;
Effective quality control during construction to ensure
foundation preparation, strength of the concrete and
appropriate cleaning and preparation of lift joints and
placement of reinforcement when used; and
Design contraction joints to accommodate displacement.
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November 29, 2010 Page 10 Final
2.4.2 Low Watana RCC Gravity Dam Expandable
The Low Watana RCC Expandable dam alternative consists of the Watana dam
constructed to a lower height of 700 feet and a four-unit powerhouse with a total
installed capacity of 600 MW (see Figures 2.4-1 to 2.4-3). The expandable
option allows for a dam raise to the height of the original Watana concept with a
dam height of 885 feet and installation of a new intake structure, an additional
power tunnel and two additional generating units with a capacity of 1,200 MW.
In order to provide for future raising of the dam and expansion of the
powerhouse, the location of the powerhouse and power intakes were adjusted
from the non-expandable alternative. The powerhouse was translated 185 feet
downstream compared to the non-expandable RCC gravity dam alternative to
allow room for RCC material to be placed downstream of the dam as part of the
dam raise.
The power intake structure was located on the left abutment as opposed to being
integral with the dam for the non-expandable alternative to provide more
flexibility for the dam raise. If the power intake were integral to the dam, a new
power intake would be more constrained and complicated by existing structures.
During expansion, a new intake channel could be excavated above the existing
structure at the appropriate invert elevation. Intakes for the expanded option
could be developed at a higher invert elevation than the first stage intakes. The
intakes for the expansion, second stage would be connected to the first stage
water conveyances at the vertical shaft, to tap into the lower, high pressure
portion tunnels leading to the powerhouse.
The powerhouse includes empty bays that can accommodate additional
generating units in the future. The gravity section will be raised by placing
additional RCC on the dam crest and downstream face of the dam. High strength
steel anchors will be installed on the first stage dam faces and will tie into the
second stage RCC placement. Prior to placement of the second stage RCC the
surface of the first stage will be cleaned and scarified using high pressure
washers. The spillway for the second stage will be constructed using the same
placement procedures and similar design as in the first stage.
The gravity dam section was checked using the CADAM program for static and
pseudo dynamic stability and found to have adequate safety factors (see R&M
2009 for a description of the analysis, loading and material properties).
The process of raising a dam at a later date is not a simple matter. We have
included some general considerations, procedures and a potential sequence to
provide some indication as to the process involved.
GENERAL
1. Planning and design prior to start of Stage 1 are critical. It may be
necessary to place some Stage 2 base RCC (up to stilling basin level)
during Stage 1 to minimize overall Stage 2 duration.
2. Stage 1 RCC mix will be designed for Stage 2 loads and loading
conditions.
3. Foundation excavation for most or all Stage 2 should be performed
during Stage 1 works to avoid blasting close to in-service dam and
powerhouse.
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4. Note that same 5.5 months per year is max time available for RCC
placement (5 months for conventional concrete).
5. Draw reservoir level down to the minimum operating level at end of
winter. Generate during summer to keep reservoir level as close as
possible to the minimum level, Note that a critical problem is handling of
flood inflows during Stage 2.
6. RCC production rates will be slower for Stage 2 than for Stage 1 due to
greater constraints on placement.
7. Dam/spillway expansion construction expected to take approximately 5
years.
PROCEDURE
1. Clean existing RCC surface to exposed coarse aggregate.
2. Make sure exposed surfaces are saturated and surface dry and that outer
18 inches is above freezing point.
3. Place bedding mix on horizontal surfaces immediately prior to placing
RCC.
4. Use grout enrichment to bond new RCC to sloping surfaces in existing
RCC.
5. Otherwise standard RCC procedures will apply (anchors between Stage 1
and Stage 2 RCC are not required).
SEQUENCE
Year 1:
Clean-up and prepare foundation and abutments.
Remove concrete from Stage 1 chute and stilling basin.
Commence aggregate production and stockpiling.
Year 2:
Place RCC in base (up to stilling basin level) and on abutments up to
approx El. 1650.
Year 3:
Continue RCC placement up to El. 1900 approx.
Place conventional concrete stilling basin.
Remove spillway conventional concrete including bridge and piers
(winter).
Year 4:
Place RCC to underside of stage 2 spillway.
Place conventional concrete in chute.
Complete RCC to crest El. on right abutment.
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Year 5:
Complete RCC to crest El. on left abutment.
Construct Stage 2 spillway crest works.
2.4.3 Low Watana RCC Gravity Dam Non-Expandable
The Low Watana Non-expandable RCC Gravity dam alternative has the same
dam profile and the general configuration is similar to the expandable alternative
above with a dam height of 700 feet and a four-unit powerhouse with a total
installed capacity of 600 MW (see Figures 2.4-4 to 2.4-7).
The major differences that lead to reduced installation costs are the shorter
diversion tunnel length and shorter power tunnel length for the surface
powerhouse as well as the size of power tunnel and tailrace. The intake structure
is shown as being incorporated into the dam on the left abutment. The
assumption is that conventional concrete would be used for the intake structure
with RCC placed against the conventional concrete.
The Powerhouse is shown as close to the dam and spillway as possible in order to
minimize the water conveyance length. The powerhouse layout does not
consider future expansion options.
2.4.4 Low Watana Gravity Arch
A Low Watana gravity arch RCC dam option was also considered (see Figures
2.4-8 to 2.4-10). The axis adopted for these preliminary gravity arch studies was
effectively that adopted for the conventional gravity dam option. In turn, this
was the axis chosen for the ICRD in the studies carried out in the 1980’s. From
this background, it can clearly be seen that the axis used for the G-A layout is by
no means optimum.
This preliminary gravity arch dam configuration was based on several factors.
First, the crown cantilever section was selected to be similar to the Hungry Horse
(gravity arch) Dam in Montana which is sited in a geometrically similar canyon.
The Hungry Horse Dam (Development of Dam Engineering in the United States,
1988) crown cantilever was configured with a vertical upstream face and a 0.6
Horizontal to 1.0 Vertical sloped downstream face. The Low Watana gravity
arch crown cantilever section was configured with a vertical upstream face and a
0.7 Horizontal to 1.0 Vertical sloped downstream face. The larger ratio was
selected based on the larger expected seismic hazard for the Susitna site and
preliminary analysis for a gravity arch RCC dam at the High Devil Canyon site.
The stream channel physical dam location, arch (constant) radius and center point
was selected based on the qualitative topographical features at the site. In
studying the topography of the site, it appears that this site is not as well suited
for arch action foundation support over the full 700-foot height of the dam. From
about elevation 1850 to the crest elevation of 2025, the cross-valley slope is
relatively small compared to the slope below elevation 1850. Therefore, in
locating the arch, the topographic contours between elevations 1550 and 1850 on
each side of the canyon were collectively examined for orientations that would
best provide for arch thrust into the foundation. After the "best" thrust
foundation profiles were located on each side of the canyon, the approximate
tangent lines to the profiles on each side were laid out on the site plan. Their
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intersection established the radius and center of the upstream arch. Having
established the arch radius and center, the remaining geometry of the dam is
integrated into the canyon using the basic section geometry of the crown
cantilever and the topography of the site.
The seismic loading will have a large component of load in the
upstream/downstream direction, and a thrust block structure may be required to
accommodate this loading. We have assumed for this preliminary estimate
(which will need to be confirmed by three-dimensional finite element analysis,
when abutment and dam properties are better known) that an additional 25% of
the base concrete costs would be sufficient to account for this component of the
dam.
With the configuration described above, the structural support behavior of the
dam is conceived to be primarily arch-gravity action in the lower two-thirds of
the dam and gravity only in the upper third. It is to be noted that the preliminary
configuration is only the starting point of the comprehensive structural and
stability analyses that would include both seismic and PMF loading. Although
the configuration is likely to be modified based on such analyses, the preliminary
configuration serves to provide a reasonable estimate of dam volumes and
construction costs.
The gravity arch has a smaller footprint than the gravity section, however the
area will remain large enough for equipment to move efficiently. The
assumption for this preliminary study has been that placement rates and RCC unit
costs would be the same for all alternatives. There will be some difference with
the grout treatment at the upstream face that will have a small increased effect on
the overall unit cost, but this should be developed in more detail if this alternative
is addressed in detail.
3.0 Project Access Issues
Access to the construction site for the alternatives considered in this report are by rail link alone
to limit access to the site and reduce costs. The Alaska Railroad provided some input on recent
costs to develop the rail link along the south side access corridor alignment. An airstrip would be
provided near the Watana project to allow use of aircraft up to a C-130 Hercules or equivalent.
3.1 Previous Project Access Costs Comparisons
Previous cost estimates for project access infrastructure for the Full Watana RCC dam
and High Devil Canyon RCC dam (R&M 2009) assumed both rail and road
transportation to the site on alignments in the south side corridor. This alternative was
compared to a Watana ICRD concept with only road access from the Denali Highway
through a northeasterly corridor (HDR 2009). While it is true that the RCC concept
would benefit greatly from the ease of transporting bulk cement and pozzolans and major
equipment and logistical access to the site by rail, road transport of these materials
equipment and supplies would also be feasible. The different project access and
logistical support transportation assumptions between the RCC and ICRD concept studies
led to a significant distortion of the comparison of the project costs. For an “apples to
apples” comparison of the options, the same basic transportation configuration (road
only, road and rail, or rail only) should be assumed for both schemes with logistics costs
included to account for transport of imported materials.
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For this immediate report, we are assuming rail access only, during construction. Future
considerations regarding access may result in removal of the rails and converting the
railroad to use of trucks and other over-the-road vehicles.
3.2 Rail Access
The alignment for the rail link only option along the southern alignment (see Figure 3.2-
1) is based on the project access and logistical studies done by R&M. A report on the
Access Planning Study by R&M for Acres was issued in January 1982 and a Supplement
to the Access Planning Study was issued in September 1982.
For the R&M 2009 report on RCC concepts the rail link alignment was assumed to be as
shown on Figure 3.2-1 which was drawn from the alignment details presented in the
R&M 1982 report. The rail access would connect to the existing Anchorage-Fairbanks
alignment of the Alaska Railroad near Gold Creek on the south east side of the Susitna
River then would proceed east up the south side of the Susitna River to the Watana site
via the north end of Stephan Lake and the west end of Fog Lakes. This alignment
requires no new bridge across the Susitna River and only requires a railhead be
constructed near Gold Creek from which to stage rail transport of goods and materials to
the Watana dam site.
A railroad is considered desirable for access to the project for construction of the RCC
dam because of the large quantities of bulk materials to be moved to the construction site
and weights anticipated for large components such as gates, penstocks, turbines,
generators and transformers and structural steel. Also a railroad would lessen the impact
of project traffic and heavy haulage on the Alaska highway system. In addition, these
material and equipment items will likely be brought to Alaska by barge, rail barge and/or
ship from the source either via Seattle or other foreign or domestic port to Anchorage or
Whittier for trans-loading onto railcars for movement to the Project site. Shipping
possibilities include rail barge for most of the materials which would allow the loaded rail
cars to pass through Whittier or Anchorage directly to the project site without trans-
loading. Materials shipped in sea containers (CONEX’s) could be offloaded from a
container ship in Anchorage and loaded onto rail cars for hauling to the project site.
Vehicles associated with the project can be moved via rail car to the Watana Project.
3.3 Airstrip
A permanent airstrip would be constructed at a suitable location near the main
construction camp. The runway is assumed to be 6,000 feet in length based on the
project final report and should be capable of accommodating the C-130 Hercules aircraft
as well as small jet passenger aircraft. If construction personnel transport were to be done
by using jet aircraft, such as the Boeing 737-400 or similar, the runway would require
greater length and should be constructed to generally higher standards than that serving
the C-130 aircraft. Roads will connect the airstrip to the camp, village, and dam site. A
small building will be constructed to serve as a terminal and tower and a fuel
truck/maintenance facility will be constructed. A helicopter pad will also be provided.
A temporary airstrip will be constructed to support the early phases of mobilization and
construction. This temporary runway will be 2,500 feet in length and will be located in
the vicinity of the main construction camp. The airstrip will be capable of supporting
smaller aircraft.
The temporary airstrip would eventually be incorporated into one of the main haul roads
after the permanent airstrip is in service.
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4.0 Cost Estimates
Cost estimates were developed for the alternatives examined. The cost estimates are intended to
extend the information provided previously (HDR 2009 and R&M 2009), and to be as
comparable as possible to the previous options.
4.1 RCC Costs
Due to the significant influence of the dam costs in the total project costs, the RCC unit
cost was developed further.
4.1.1 RCC Unit Cost Analysis for Watana Dam
The Watana dam RCC unit cost was analyzed utilizing the contractor estimating
approach of itemizing labor, equipment and materials (L, E & M) costs.
Furthermore the unit cost was analyzed with the L, E &M approach in respect to
three phases; the aggregate production and pozzolan materials delivery; RCC
placement; and RCC production. A detailed breakdown of RCC Unit Costs may
be viewed in Appendix A.
In the 1985 Harza Ebasco study, Borrow Pit E was designated as the
conventional concrete aggregate source (see Figure 4.1-1). Borrow Pit E is
located approximately 2 miles west of the dam axis on the north bank of the
river.
Since the proposed site access for the Low Watana Development is from the
south and aggregate production is scheduled to commence 12 months prior to
RCC production, other borrow pits were reviewed for possible RCC aggregate
sources. In review of the Acres, “Susitna Hydroelectric Project – 1980-81
Geotechnical Report”, Quarry Site A was of primary interest due to its close
proximity to the dam and location on the south bank. The previous geotechnical
reports indicate that Quarry Site A contains good quality rock. It has an estimated
23 million cubic yards (mcy) of weathered rock and 71 mcy of good quality rock
above elevation 2300 ft. The geotechnical report described the rock as “very
resistant to abrasion and mechanical breakdown, seldom losing strength or
durability in the presence of water and demonstrating high resistance to
breakdown by freeze-thaw.” The requirements for RCC aggregates are different
than for conventional concrete and effectively any moderately to slightly
weathered, non-reactive rock can be assumed to be worthy of consideration until
proven otherwise.
The Borrow Pit E source was considered the primary source for aggregate in the
1985 Harza Ebasco study, however there would likely be significant excavation
below the Susitna River water line. Due to its close proximity to the dam on the
south bank, good rock qualities and abundance of material, Quarry Site A
appears to be a very attractive RCC aggregate source. Since Quarry Site A is
well above the river level, permitting would likely be less complicated than with
Borrow Pit E. Preliminary volume estimates for the Low Watana Gravity Dam
indicate that approximately 7.6 mcy of roller compacted concrete would be
required. The preliminary RCC mix design requires approximately 80%
aggregate by volume, which results in a total required aggregate volume of 6.1
mcy.
Due to the limited scope of this study, a detailed cost estimate of an aggregate
production facility at Quarry Site A was not done on an itemized basis, rather, the
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costs developed in the 1982 Acres study were utilized and escalated to 2008
dollars. The 1982 unit cost for aggregate production and hauling were escalated
using the USBR Construction Cost Index under the category “Concrete Dams”.
The 1982 study utilized Borrow Pit E as the aggregate source, and it was
assumed that the crushing and screening facilities would be similar for Quarry
Site A. The estimated production from Borrow Pit E was 6.2 mcy, while the
required production at Quarry Site A is approximately 6.1 mcy or less depending
on the selected alternative. The aggregate haul costs were similarly escalated to
2008 dollars, which may be conservative since the round trip distance for Borrow
Pit E was 4 miles compared to an estimated 1 mile for Quarry Site A. Another
source of conservatism is that Quarry Site A has a much deeper groundwater
table and less overburden as compared to Borrow Pit E, which will decrease the
dewatering and clearing costs.
The cementitous material costs $180/ton ($48.86/cy) as determined in the R&M
2009 study were used in this cost analysis1. Also it was assumed that 4 ARAN
Modumix III (MM III) batch plants would be installed to produce an average of
1,000 cy/hr of RCC. The total installation cost of the batch plants was estimated
to be $20 million. Each of these assumptions is consistent with the Full Watana
RCC Analysis. Other important assumptions used in the Full Watana RCC
analysis that were utilized for determining labor and equipment costs are; RCC is
mixed in 8 cy batches; each work day consists of two 10 hour shifts; the
construction season is 5.5 months; and the total number of working days per
season is 165.
As previously mentioned, RCC will be delivered to the dam via conveyors and
chutes. Standard 10 cy (or larger) rear dump trucks will be used to transport the
mixes to various placement locations. The estimated cycle times for dump trucks
was calculated in order to determine the total number of trucks required for
placement. In order to determine the total amount of placement crews required,
the RS Means (RS Means 2010) estimation of cy of RCC placed per day per
crew was adjusted to an hourly placement rate. In this manner the total number of
haul trucks and placement crews was determined by the average RCC production
rate of 1,000 cy/hr. Additional workers including laborers, foreman, operators,
and mechanics, etc., were estimated based on total number of crews and trucks.
Hourly labor rates for each trade were taken from the RS Means data. This
hourly rate was then prorated to include the overtime for a 10 hr work day and
multiplied by the city cost index for Fairbanks.
The total pieces of equipment was based on the number of placement crews and
batch plant operations. The RS Means (RS Means 2010) Hourly Operational
Costs and Monthly Rental Rates were utilized for the analysis. Each was
multiplied by the Fairbanks City Cost Index. Using the average production rate, a
total number of required work days for placement was determined, which
resulted in 3 construction seasons. The overall rental rates were then calculated
for operational time and idle time. Based on previous experience, it was assumed
that the total equipment operational cost of the batch plant was equal to the total
cost of supply of the batch plant, which has been estimated to be approximately
$20 million.
1 Note that this cost is based on the assumption that all supplementary cementitious materials (pozzolan, fly
ash, etc) used in the mix are imported. If suitable sources of pozzolanic materials are identified within
Alaska, substantial reductions in this unit price may well be possible.
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The detailed breakdown of the RCC unit cost resulted in a total per cubic yard
cost of $97.21, which compares very well to the previous RCC unit cost of
$100/cy used in for the Full Watana alternative (R&M 2009). Further analysis of
the aggregate production plant and RCC batch plants may show additional
reductions in costs, but for the scope of this analysis an RCC unit cost of $100/cy
appears valid.
4.1.2 Sizing of RCC Batching Plant
The abutments at the Watana Site are ideal for the transportation of the RCC to
the dam surface using a ‘vacuum chute’. The RCC can be lowered 250 to 350
feet for placement without difficulty. Therefore, based on potential quarry
location and using any of the above-mentioned transportation methods, the most
appropriate location for the RCC batching plant for Low Watana would appear to
be at the intake approach channel. This area is already planned to be excavated
for the intake, therefore a separate excavation for a batch plant would not be
required. It would also be approximately two-thirds the height of the dam and
allow for transport of material to the placement elevations above and below the
intake. For the bottom half of the dam, a fixed conveyor could run downwards
from the plant to a hopper at about half height near the axis of the dam. This
hopper could feed a chute that would load the trucks on the dam surface. As the
dam increased in height, sections of the chutes/pipes would be removed. For the
placement of RCC in the upper half of the dam, the fixed conveyor could run
from the concrete batching plant upwards to a hopper just above the crest of the
dam that would then feed a chute for final conveyance to the trucks on the dam
surface. This RCC transportation scheme would provide a very simple and
reliable (and inexpensive) method that has the potential for reducing the unit
costs estimated.
4.2 Camp Cost
The 1982 Acres Feasibility Study cost estimate had assumed for the Watana embankment
dam a camp for 3,600 workers, a project village, and support facilities. The 2009 HRD
report indicated a much smaller camp than anticipated in 1982.
When comparing the ICRD to the RCC dam alone, the smaller volume of the RCC dam
would logically reduce the workforce required. However is anticipated to be 24/7 for 5.5
months. Embankment fill placement for the ICRD is presumably daylight hours for 8-9
months. For RCC, crews are smaller (more highly mechanized operation) but there are
more of them. We have assumed the camp for the RCC dam construction costing about
20 percent less than that for the embankment dam concept (factor of 18.75% was used in
calculations).
4.3 Project Access Cost
It has been assumed that the rail line can be installed at the average rate of $4.7 million
per mile based on Alaska Railroad estimating guidelines.
4.4 Cost Summary
A comparison table of the Low Watana options is presented as Table 4.4-1. Detailed cost
estimates are presented in Appendix B.
R&M/Hatch/Linard Supplemental Report -Low Watana RCC Concept November 29, 2010 Page 18 Final Table 4.4-1: Cost Comparison of Selected Low Watana ICRD and RCC Alternatives (1) From HDR 200971A Engineering, Env, and Regulatory (7%)236,000,000$ 259,000,000$ 203,200,000$ 217,900,000$ 186,600,000$ 330 Land and Land Rights121,000,000$ 121,000,000$ 120,900,000$ 120,900,000$ 120,900,000$ 331 Power Plant Structure Improvements115,000,000$ 159,000,000$ 121,219,000$ 161,389,000$ 121,219,000$ 332.1-.4 Reservoir, Dams and tunnels1,537,690,000$ 1,718,000,000$ 1,425,110,000$ 1,472,944,000$ 1,220,892,000$ 332.5-.9 Waterways590,000,000$ 677,000,000$ 276,342,000$ 387,367,000$ 242,655,000$ 333 Waterwheels, Turbines and Generators297,000,000$ 297,000,000$ 297,000,000$ 297,000,000$ 297,000,000$ 334 Accessory Electrical Equipment41,000,000$ 41,000,000$ 40,000,000$ 40,000,000$ 40,000,000$ 335 Misc Power Plant Equipment21,000,000$ 32,000,000$ 21,000,000$ 32,000,000$ 32,000,000$ 336 Roads, Rails and Air Facilities 232,000,000$ 232,000,000$ 254,700,000$ 254,700,000$ 254,700,000$ 350-390 Transmission Features224,000,000$ 224,000,000$ 207,362,000$ 207,362,000$ 207,362,000$ 63Main Construction Camp180,000,000$ 180,000,000$ 123,800,000$ 123,800,000$ 123,800,000$ 399 Other Tangible Property16,000,000$ 16,000,000$ 15,800,000$ 15,800,000$ 15,800,000$ 71BConstruction Management (4%)135,000,000$ 148,000,000$ 116,100,000$ 124,500,000$ 106,600,000$ Total Subtotal Subtotal3,745,690,000$ 4,104,000,000$ 3,222,533,000$ 3,455,662,000$ 2,969,528,000$ Total Contingency Contingency (20%)749,138,000$ 821,005,200$ 644,506,600$ 691,132,400$ 593,905,600$ Total Total Estimated Const. Costs (Million $)$4,500 $5,000 $3,900 $4,200 $3,6005.003.904.20Low Watana Non-Expandable ICRD (1)Low Watana Expandable ICRD (1)Low Watana Expandable ICRD (1)Low Watana Non-Expandable ICRD (1)Total Estimated Const. Costs (Billions $)3.60FERC Line #Line Item NameLow Watana RCC - Non-ExpandableLow Watana RCC - ExpandableLow Watana RCC Gravity ArchLine Item NameLow Watana RCC - Non-ExpandableLow Watana RCC - ExpandableLow Watana RCC Gravity Arch4.50
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5.0 Project Schedule
The ICRD configuration has two basic construction fronts; dam and powerhouse, which are relatively
independent of each other. With a surface powerhouse near an RCC gravity or gravity arch, the construction
area is less independent and a higher level of coordination would be required during construction operations.
5.1 Dam
The anticipated construction season for RCC or conventional concrete construction is 5.5 months, with a
maximum of 165 working days. Certain activities such as aggregate production and underground work
may be continuous, year-round operations. The ICRD dam configuration has two basic construction
fronts; dam and powerhouse, which are relatively independent of each other. With a surface
powerhouse near an RCC gravity or gravity arch, the construction area is less independent and a higher
level of coordination would be required during construction.
Previous studies (R&M 2009) for the Full Watana RCC option have assumed an average daily
placement rate of 20,000 cy/day, which equates to an average monthly placement rate of 600,000
cy/mn. Currently the maximum peak placement observed rate of RCC placement is 525,000 cy/mn
(MD&A figures for a single production plant). The significantly higher monthly placement rate for the
Watana Dam is due to the plan of installing two separate large RCC production facilities. In order to
optimize the RCC construction during the short construction season at the site, significant production
facilities will be needed. The nominal production capacity of each of the two RCC plants will be
similar to existing recent projects. The Watana site is expected to benefit from aggregate production for
more than the 5.5 months assumed for dam placement as well as advantageous location of the Site A
quarry. Aggregate production will commence at least 12 months prior to the start of RCC placement.
Production are estimated to be double shifts, 6 days per week for 8 to 9 months per year and must be
planned to ensure that aggregate production does not impact critical path. The ratio of nominal daily
production capacity to average production rates will be approximately 2. By factoring the volume of the
dam and using average production rates ranging between 20,000–15,000 cy/day, the approximate dam
construction time is shown below in Table 5.1
Table 5.1-1 Time Required for RCC Dam Placement
Alternative Volume (million) Time to place material
Full Watana 15.0 4.5 to 6 years
Low Watana Gravity 8 2.4 to 3.2 years
Low Watana Gravity Arch 6.5 2 to 2.6 years
5.2 Powerhouse
A surface powerhouse would be more subject to climatic constraints than an underground powerhouse
and therefore the construction season for exterior work involving concrete placement would have
similar limitations to dam placement. Once the powerhouse shell is completed, equipment installation
could continue through the winter season.
The underground powerhouse is subject to greater geotechnical uncertainty which could result in
modifications to design plans and potential project delays.
The powerhouse excavation for the surface powerhouse may begin prior to diversion tunnel and
cofferdam completion (potentially providing material for the pre-cofferdam and cofferdam). Similarly
the south abutment excavation and grouting may be performed concurrently with the diversion
construction. Through careful scheduling, it may be possible for the excavation above river level on the
south abutment and excavation for the surface powerhouse to be completed at approximately the same
time as the diversion completion. After diversion, the dam and surface powerhouse foundation
excavation and treatment may continue. The diversion cofferdams may also function for river crossing
such that the north abutment excavation and treatment may begin.
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Once the powerhouse shell is completed, equipment installation could continue through the winter
season. Therefore the completion of the surface powerhouse shell is a significant project milestone, such
that it should have a target completion date that will not cause it to be a critical path item.
5.3 Combined Dam and Powerhouse Schedule
The schedule for the ICRD Low Watana dam (HDR 2009) shows similar time for dam construction and
powerhouse/transmission lines. More detailed review is required to determine which element is on the
critical path. The RCC dam is expected to be constructed in less time than the ICRD dam, which will
place the powerhouse onto the critical path for construction.
At this point, given the current level of design and schedule we are not able to demonstrate significant
schedule advantage for the overall project with the RCC scheme. However it should be noted that other
projects using RCC dams that allowed early completion of the dam construction and impoundment of
the reservoir, found the benefit of early generation revenue and availability of additional construction
and management resources combined to allow powerhouse construction and equipment installation to be
significantly accelerated to significant economic advantage.
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References
1. Acres, 1982. Susitna Hydroelectric Project, Feasibility Report. Volumes 1-7. Prepared for the Alaska
Power Authority
2. Harza-Ebasco Susitna Joint Venture, September 1983, “Winter 1983 Geotechnical Exploration
Program, Volume 1, Main Report”
3. Harza-Ebasco Susitna Joint Venture, November 1985, “Susitna Hydroelectric Project, Draft License
Application, Volume 1, Exhibit A, Project Description.
4. Harza-Ebasco Susitna Joint Venture, November 1985, “Susitna Hydroelectric Project, Draft License
Application, Volume 12, Chapter 6 – Geological and Soil Resources”
5. HDR 2009, Susitna Hydroelectric Project, Conceptual Alternatives Design Report, Final Draft,
November 23, 2009
6. R&M 2009 Susitna Project, Watana and High Devil Canyon RCC Dam Cost Evaluation
7. Kollgaard, Eric B. and Chadwick, Wallace L. “Development of Dam Engineering in the United
States, Prepared in Commemoration of the Sixteenth Congress of the International Commission
on Large Dams by the United States Committee on Large Dams” 1988
8. USACE, Dec 31, 1985. “Engineering and Design Hydropower, Engineering Manual 1110-2-
1701”
9. USBR, 1958. “Hydro-electric Power Plant Costs, Drawing 104-D-701, Series 150 Estimating,
United States Bureau of Reclamation, dated: Nov 7, 1958”
10. American Society of Civil Engineers (ASCE), 1989. “Civil Engineering Guidelines for
Planning and Designing Hydroelectric Developments. Volume 3 – Powerhouses and Related
Topics”
11. USACE, 2010. “HEC-RAS River Analysis System Hydraulic Reference Manual. Version 4.1.
January 2010”
12. USBR, 1986, “Engineering Monograph No. 3 – Welded Steel Penstocks
13. USBR, 2010. “Bureau of Reclamation Construction Cost Trends, Jan 2008 – Jul 2010”
14. USBR, 1983. “Bureau of Reclamation Construction Cost Trends, Jan 1980 – Oct 1983”
15. Acres, 1982. Susitna Hydroelectric Project, 1980-81 Geotechnical Report. Volume 1
16. Acres, 1982. Book B – Watana Dam Development of Unit Costs
11/29/2010
Figures
NOTICE TO READER - Some of the Figures have been taken from previous Susitna Project
reports and the conventions for cardinal direction are inconsistent from report to report in many
cases, i.e. North is the top of the page on some figures and the bottom of the page on others. The
Figures were not re-drawn for this report. New figures use the convention of North at the top of
the sheet. Many old figures use the convention of stream flow from left to right; the Susitna River
in the area of the Susitna project flows from east to west.
List of Figures
Figure 2.2-1 Low Watana ICRD Expandable Plan
Figure 2.2-2 Low Watana ICRD Expandable Section
Figure 2.2-3 Low Watana ICRD Expandable Stage 2 Section
Figure 2.2-4 Low Watana ICRD Power Facilities
Figure 2.4-1 Low Watana RCC Expandable Plan
Figure 2.4-2 Low Watana RCC Expandable Sections and Details
Figure 2.4-3 Low Watana RCC Expandable Elevation Views
Figure 2.4-4 Low Watana RCC Non-Expandable Plan and Detail View
Figure 2.4-5 Low Watana RCC Non-Expandable Sections and Details
Figure 2.4-6 Low Watana RCC Non-Expandable Elevation Views
Figure 2.4-7 Low Watana RCC Non-Expandable Profile
Figure 2.4-8 Low Watana RCC Non-Expandable Gravity Arch Plan
Figure 2.4-9 Low Watana RCC Non-Expandable Gravity Arch Sections and Details
Figure 3.2-1 Low Watana Rail Access
Figure 4.1-1 Borrow Areas
POWERHOUSE
24' I.D. CONCRETE
LINED PENSTOCK
2200
2100
2000
1900
1800
1800
2200
EL. 1850
EL. 1965
EL. 1700
EL. 1550
27' I.D. DIVERSION
TUNNELS
EL. 1700
ACCESS
EL. 1550 ACCESS
DIVERSION TUNNEL
INTAKE CONTROLS
15' I.D. STEEL
LINED PENSTOCK (TYP)
TRAINING WALL FOR
EXPANDED INTAKE
STAGE 2 - INV EL. 1970
STAGE 1 - INV EL. 1785
FUTURE EXCAVATION
FOR EXPANSION
FUTURE EXPANSION
INTAKE ACCESS ROAD
FUTURE
EXPANSION
INTAKES
FULL WATANA OUTLINE
EDGE OF CONCRETE
SHAFTS
Low Watana RCC Expandable - Plan
SUSITNA PROJECT
AEA
FIGURE 2.4.1
915.0'
20.0'
1
1
1
1
EL. 1550.0
EL. 1350.0
EL. 1700.0
EL. 1850.0
U/S COFFERDAM
BASE PLATFORM
GROUTING AND
DRAINAGE GALLERIES
EL. 1450.0
SLURRY
TRENCH
DRAINAGECONSOLIDATION
GROUTING
INSTRUMENTATION
GALLERY
GROUT CURTAIN
EL. 1965.0
TOP OF D/S COFFERDAM
CREST EL. 1470.0
RIVERBED
EL. 1450.0
FULL WATANA
DAM PROFILE
LOW WATANA
MIN. OPERATING LEVEL
EL. 1850.0
LOW WATANA
MAX. OPERATING LEVEL
EL. 2000.0CREST EL. 2025.0
FULL WATANA
CREST EL. 2210.0FULL WATANA
SPILLWAY EL. 2185.0
RIPRAP BACKFILL
BAFFLE
WALL
MAX. TWL
EL. 1478.0
EL. 1447.5
TOP OF WALL
EL. 1485.0
NORMAL TWL
EL. 1457.0
SPILLWAY
PIERS
15.2'
CONVENTIONAL
CONCRETE
3.0' (TYP)
PIER EL. 2019.0
CREST EL. 2025.0 PMF EL. 2026.8
FLOW
SPILLWAY CREST
EL. 2000.0
CONVENTIONAL
CONCRETE
3.0'
Low Watana RCC Expandable
Sections and Details
SUSITNA PROJECT
AEA
FIGURE 2.4.2
1300
1500
1700
1900
2100
2300
1550
1700
1850
1965
ELEVATION THRU GALLERIES
INSTRUMENTATION
GALLERY
BASE PLATFORM
GROUTING AND
DRAINAGE GALLERIES
(TYP)
27' I.D. DIVERSION TUNNELS
U/S INV. EL 1460'
D/S INV. EL 1450'
24' I.D. CONCRETE
LINED PENSTOCKS
NOTE:
GROUT CURTAIN NOT SHOWN
FOR CLARITY. CURTAIL WILL
EXTEND TO A DEPTH OF
APPROXIMATELY 2 / 3 THE
DAM HEIGHT
EL. 2025
FUTURE EXPANSION
PENSTOCK
EL. 2210
FUTURE EXPANSION
SPILLWAY CREST
SPILLWAY CREST
1300
1500
1700
1900
2100
2300
DOWNSTREAM ELEVATION
FUTURE EXPANSION
PENSTOCKS
15' I.D. STEEL
LINED PENSTOCK (TYP)
27' I.D. DIVERSION TUNNELS
U/S INV. EL 1460'
D/S INV. EL 1450'
EL. 2025
EL. 2210
FUTURE EXPANSION
SPILLWAY CREST
STEPPED SPILLWAY
Low Watana RCC Expandable - Elevation Views
AEA
FIGURE 2.4.3
DIVERSION TUNNEL
INTAKE CONTROLS
2200
2100
2000
1900
1800
1500
1800
2200
EL. 1850
EL. 1965
EL. 1700
EL. 1550
POWERHOUSE
24' I.D. CONCRETE
LINED PENSTOCK
INTAKES
15' I.D. STEEL
LINED PENSTOCK (TYP)
TAILRACE
TRAINING WALL
EL. 1450'
27' I.D. DIVERSION
TUNNELS
INTAKES
TRASHRACK
SURFACE STORAGE
AND PARKING
1550' ACCESS
1700' ACCESS
Low Watana RCC Non Expandable
Plan and Detail View
SUSITNA PROJECT
AEA
FIGURE 2.4.4
915.0'
20.0'
1
1
1
1
EL. 1550.0
EL. 1350.0
EL. 1700.0
EL. 1850.0
U/S COFFERDAM
BASE PLATFORM
GROUTING AND
DRAINAGE GALLERIES
EL. 1450.0
SLURRY
TRENCH
DRAINAGECONSOLIDATION
GROUTING
INSTRUMENTATION
GALLERY
GROUT CURTAIN
EL. 1965.0
TOP OF D/S COFFERDAM
CREST EL. 1470.0
RIVERBED
EL. 1450.0
LOW WATANA
MIN. OPERATING LEVEL
EL. 1850.0
LOW WATANA
MAX. OPERATING LEVEL
EL. 2000.0CREST EL. 2025.0
RIPRAP BACKFILL
BAFFLE
WALL
MAX. TWL
EL. 1478.0
EL. 1447.5
TOP OF WALL
EL. 1485.0
NORMAL TWL
EL. 1457.0
SPILLWAY
PIERS
15.2'
CONVENTIONAL
CONCRETE
3.0' (TYP)
PIER EL. 2019.0
CREST EL. 2025.0 PMF EL. 2026.8
FLOW
SPILLWAY CREST
EL. 2000.0
CONVENTIONAL
CONCRETE
3.0'
Low Watana RCC Non Expandable
Sections and Details
SUSITNA PROJECT
AEA
FIGURE 2.4.5
1300
1500
1700
1900
2100
2300
1550
1700
1850
1965
ELEVATION THRU GALLERIES
INSTRUMENTATION
GALLERY
BASE PLATFORM
SPILLWAY CREST
GROUTING AND
DRAINAGE GALLERIES
(TYP)
27' I.D. DIVERSION TUNNELS
U/S INV. EL 1460'
D/S INV. EL 1450'
24' I.D. CONCRETE
LINED PENSTOCK (TYP)
POWER INTAKE
CONTROL
NOTE:
GROUT CURTAIN NOT SHOWN
FOR CLARITY. CURTAIL WILL
EXTEND TO A DEPTH OF
APPROXIMATELY 2 / 3 THE
DAM HEIGHT
1300
1500
1700
1900
2100
2300
DOWNSTREAM ELEVATION
STEPPED
SPILLWAY
24' I.D. CONCRETE
LINED PENSTOCK (TYP)
15' I.D. STEEL
LINED PENSTOCK (TYP)
27' I.D. DIVERSION TUNNELS
U/S INV. EL 1460'
D/S INV. EL 1450'
Low Watana RCC Non Expandable - Elevation Views
SUSITNA PROJECT
AEA
FIGURE 2.4.6
EL 1965'
1
325'
225'150'200'
46'32'48'
78'
POWER INTAKE CONTROLS
1
EL 1422
24' I.D. CONCRETE
LINED PENSTOCK
24' I.D. CONCRETE
LINED PENSTOCK
15' I.D. STEEL
LINED PENSTOCK
CREST EL 2025.00'
TURBINES
EL 1485'
TRANSFORMER
NORMAL T.W.
EL 1457'MIN. T.W.
EL 1450'
NORMAL
MAX. POOL
EL 2014'
NORMAL
MIN. POOL
EL 1850'
SILL
INVERT
EL 1785'
EL 1850'
EL 1700'
EL 1550'
GROUTING AND DRAINAGE GALLERY (TYP)
MAX. T.W.
EL 1478'
ROOF
EL 1530'
3
1
BOTTOM OF
DRAFT TUBE
EL 1384'
EL 1404'
4H : 1V SLOPE
DRAFT TUBE
EL 1379'
TRANSFORMER DECK
TAILRACE TRAINING WALL
10' DEEP CUT OFF WALL
18" THICK CONCRETE
TAILRACE APRON
48" I.D. VENT /
INSPECTION SHAFTCONVENTIONAL
CONCRETE
RCC
Low Watana RCC Non Expandable - Profile
SUSITNA PROJECT
AEA
FIGURE 2.4.7
2000
1900
1800
1800
PRE-COFFERDAM
RCC COFFERDAM
POWERHOUSE
24' I.D. CONCRETE
LINED PENSTOCK
TAILRACE
CHANNEL
15' I.D. STEEL
LINED PENSTOCK (TYP)
TAILRACE
TRAINING WALL
INTAKES
TRASHRACK
INTAKES
D/S COFFERDAM
27" I.D. DIVERSION TUNNELS
DIVERSION TUNNEL
INTAKE CONTROLS
THRUST BLOCK
SECTION
THRUST BLOCK
SECTION
Low Watana RCC Non Expandable
Gravity Arch - Plan
SUSITNA PROJECT
AEA
FIGURE 2.4.8
544.02'
20.0'
1
0.7
EL. 1550.0
EL. 1350.0
EL. 1700.0
EL. 1850.0
BASE
PLATFORM
GROUTING AND
DRAINAGE GALLERIES
SLURRY
TRENCH
DRAINAGECONSOLIDATION
GROUTING
INSTRUMENTATION
GALLERY
GROUT CURTAIN
EL. 1965.0
TOP OF D/S COFFERDAM
CREST EL. 1470.0
RIVERBED
EL. 1450.0 1
1 U/S COFFERDAM
1
1
2
1
PRE-COFFERDAM
LOW WATANA
GRAVITY DAM PROFILE
RIVERBED
EL. 1450.0
RIVER ALLUVIU
LOW WATANA
MIN. OPERATING LEVEL
EL. 1850.0
LOW WATANA
MAX. OPERATING LEVEL
EL. 2000.0
BAFFLE
WALL
TOP OF WALL
EL. 1485.0
MAX. TWL
EL. 1478.0
NORMAL TWL
EL. 1457.0
EL. 1447.5
PMF EL. 2026.8
FLOW
CONVENTIONAL
CONCRETE
3.0'
10.6'
CONVENTIONAL
CONCRETE
3.0'
(TYP)
SPILLWAY
PIERS
30.0'
Low Watana RCC Non Expandable
Gravity Arch - Sections and Details
SUSITNA PROJECT
AEA
FIGURE 2.4.9
11/29/2010
Appendix A
Breakdown of Unit Cost Analysis for RCC
Low Watana RCC DamRCC Unit Cost AnalysisNovember 3, 2010 Total RCC Volume (cyd) 7,600,000 USBR Category Concrete DamsPercent of Aggregate by Volume80.3%Jan 1982 Factor128Total Required Aggregate Volume (cyd)6,102,800 Oct 2008 Factor334Est. Round Trip Haul Dist. From Borrow Pit A to Processing (mi.)1 Jul 2010 Factor325Total Volume (cyd)6,200,000 Total Production Hours (hr)13,000 Avg Production Rate (cyd/hr) (Not in Book B)476.92 Est. Round Trip Haul Dist. From Borrow Pit E to Processing (mi.)4 DescriptionLaborMaterialsEquipmentTotalAggregate Processing16,584,230.00$ 2,930,400.00$ 36,322,000.00$ 55,836,630.00$ Install & Removal of Plant1,650,000.00$ -$ -$ 1,650,000.00$ Total Aggregate Processing Cost ($/cyd)18,234,230.00$ 2,930,400.00$ 36,322,000.00$ 57,486,630.00$ Aggregate Processing Unit Cost ($/cyd)2.9410.4735.8589.272Aggregate Hauling Unit Cost ($/cyd)1.1040.013.5834.697Total Aggregate Production Cost ($/cyd)4.05$ 0.48$ 9.44$ 13.97$ USBR Ratio Jul 2010:Jan 19822.542.542.542.54Jul 2010 Total Agg Production Cost ($/cyd)10.27$ 1.23$ 23.97$ 35.47$ Total Cost of 4 ARAN Modumix III Batch Plants incl Installation20,000,000.00$ Total Batch Plant Unit Cost ($/cyd)2.63$ 2.63$ Cement & Fly Ash Cost ($/cyd)-$ 48.86$ -$ 48.86$ RCC Placement Cost ($/cyd)1.22$ -$ 3.22$ 4.44$ RCC production Cost ($/cyd)0.75$ -$ 5.05$ 5.81$ Final RCC Unit Cost ($/cyd)12.24$ 50.09$ 34.88$ 97.21$ Low Watana Embankment 1982 Assumptions/Totals (Book B - Development of Unit Costs)Low Watana RCC Assumptions/Totals*Costs used for 1982 Aggregate Production will be escalated to 2010 costs. Total aggregate volumes are very similar. Also the haul costs will be conservative since haul distance to Borrow Pit A is less than Borrow Pit E. Low Watana Embankment 1982 Aggregate Production Costs (Book B - Development of Unit Costs)USBR Construction Cost Index
DivisionInstallation Index0241, 31-34 Site & Infrastructure, Demolition131.503 Concrete115.3RS Means Work Day (hr)8Low Watana RCC Work Day (hr)10Pay Rate Increase for Overtime1.5Ajustment Factor1.375# of WorkersTradeRS Means 2010 - Total Hourly Rate incl. O & P ($/hr)Overtime AdjustmentTotal Hourly Rate incl Overtime City Cost IndexTotal Hourly Rate at Watana ($/hr)7 Equipment Operator (med.) - Dozer64.30$ 1.375 88.41$ 131.5 116.26$ 7 Equipment Operator (light.) - Roller61.85$ 1.375 85.04$ 131.5 111.83$ 7 Laborers - RCC Placement48.45$ 1.375 66.62$ 131.5 87.60$ 7 Foreman Average, Outside68.55$ 1.375 94.26$ 131.5 123.95$ 5 Laborers - Flagman (Directing Truck Traffic)48.45$ 1.375 66.62$ 131.5 87.60$ 4 Mechanic - Trucks, Dozers & Rollers66.75$ 1.375 91.78$ 131.5 120.69$ 1 Electrician - Converyors & Equipment72.85$ 1.375 100.17$ 131.5 131.72$ 25 Truck Drivers (Light) - 8 cyd Rear Dump49.20$ 1.375 67.65$ 131.5 88.96$ 2 Truck Drivers (Light) - Fuel Trucks49.20$ 1.375 67.65$ 131.5 88.96$ 2 Equipment Operator (light.) - Skid Steer Loader61.85$ 1.375 85.04$ 131.5 111.83$ 1 Site Supervisor82.26$ 1.375 113.11$ 131.5 148.74$ 68 Total Hourly Wages1,218.15$ Average RCC Production Rate (cyd/hr)1000Total Labor Costs per Unit ($/cyd)1.22$ 4 Batch Plant Operator 82.26$ 1.375 113.11$ 131.5 148.74$ 8 Equipment Operator (med.) - Front End Loader 64.30$ 1.375 88.41$ 131.5 116.26$ 2 Mechanic - Batch Plant 66.75$ 1.375 91.78$ 131.5 120.69$ 1 Electrician - Batch Plants 72.85$ 1.375 100.17$ 131.5 131.72$ 7 Laborers - Flagman (At Dishcarge Chutes) 48.45$ 1.375 66.62$ 131.5 87.60$ 1 Site Supervisor82.26$ 1.375 113.11$ 131.5 148.74$ 23 Total Hourly Wages753.75$ Average RCC Production Rate (cyd/hr)1000Total Labor Costs per Unit ($/cyd)0.75$ 91Total # of Workers, assumes (2) - 10hr Shifts 182RCC Labor CostsCity Cost Index for Fairbanks, AKAdjustment Factor for OvertimeRCC Placement on DamRCC Production
DivisionInstallation Index0241, 31-34 Site & Infrastructure, Demolition131.503 Concrete115.3Shift Duration (hr)10Shifts per Day 2Work Hours per Day20Average Production RCC Production Rate (cyd/hr)1,000 Average RCC Production Per Day (cyd/day)20,000 Total RCC Volume (cyd)7,600,000 Required Days of Production380 Construction Season (Months/Yr)5.5 Construction Season (Days/Yr)165 Minimum Construction Seasons2.30 Total Number of Construction Season3Total Months in Operation per Year5.5Idle Equipment Cost vs Operation75%Total RCC Construction Seasons3Total Months of Operation16.5Total Months Idle13.0# of UnitsTradeRS Means 2010 - Total Hourly Rate incl. O & P ($/hr)Hours of Operation per DayTotal Production DaysEquipment Operation Cost per UnitOperation Rental MonthsMonthly Rental RateIdle Rental MonthsTotal Equipment Rental Cost per UnitTotal Operation + Rental Cost per UnitTotal All Units Total Incl Cost Index7 Dozer 200 hp68.60$ 20380 521,360.00$ 16.5 9,650.00$ 13.0 253,312.50$ 774,672.50$ 5,422,707.50$ 7,130,860.36$ 7 Vibratory Roller 35 hp10.40$ 20380 79,040.00$ 16.5 2,275.00$ 13.0 59,718.75$ 138,758.75$ 971,311.25$ 1,277,274.29$ 25 Truck, Dump, 2-axle, 12 ton, 8 cy payload33.35$ 20380 253,460.00$ 16.5 2,025.00$ 13.0 53,156.25$ 306,616.25$ 7,665,406.25$ 10,080,009.22$ 2 Fuel Truck (Used RS Means Water Truck Data)84.65$ 20380 643,340.00$ 16.5 7,250.00$ 13.0 190,312.50$ 833,652.50$ 1,667,305.00$ 2,192,506.08$ 1 Forklift, straight mast, 21' lift, 4WD 20.20$ 20380 153,520.00$ 16.5 2,225.00$ 13.0 58,406.25$ 211,926.25$ 211,926.25$ 278,683.02$ 2 Skid Steer Loader, 1 cyd, 78 hp19.00$ 20380 144,400.00$ 16.5 2,075.00$ 13.0 54,468.75$ 198,868.75$ 397,737.50$ 523,024.81$ 13 Pickup Truck, 4WD13.50$ 20380 102,600.00$ 16.5 645.00$ 13.0 16,931.25$ 119,531.25$ 1,553,906.25$ 2,043,386.72$ 7 Laser Level - Grading1.17$ 20380 8,892.00$ 16.5 700.00$ 13.0 18,375.00$ 27,267.00$ 190,869.00$ 250,992.74$ 10 Floodlights, trailer mounted w generator - (4) 300 watts4.20$ 10380 15,960.00$ 16.5 795.00$ 13.0 20,868.75$ 36,828.75$ 368,287.50$ 484,298.06$ 3 Misc Hand Tools5.00$ 20380 38,000.00$ 16.5 850.00$ 13.0 22,312.50$ 60,312.50$ 180,937.50$ 237,932.81$ 77Total Placement Equipment Costs 24,498,968.11$ Total RCC cyd7,600,000Total Placement Equipment Cost per Unit RCC ($/cyd)3.22$ 8 Front End Loader, 10 cyd, 620 hp129.55$ 20380 984,580.00$ 16.5 23,500.00$ 13.0 616,875.00$ 1,601,455.00$ 12,811,640.00$ 16,847,306.60$ 2 Forklift, straight mast, 21' lift, 4WD 20.20$ 20380 153,520.00$ 16.5 2,225.00$ 13.0 58,406.25$ 211,926.25$ 423,852.50$ 557,366.04$ 8 Pickup Truck, 4WD13.50$ 20380 102,600.00$ 16.5 645.00$ 13.0 16,931.25$ 119,531.25$ 956,250.00$ 1,257,468.75$ 8 Floodlights, trailer mounted w generator - (4) 300 watts4.20$ 10380 15,960.00$ 16.5 795.00$ 13.0 20,868.75$ 36,828.75$ 294,630.00$ 387,438.45$ 2 Misc Hand Tools5.00$ 20380 38,000.00$ 16.5 850.00$ 13.0 22,312.50$ 60,312.50$ 120,625.00$ 158,621.88$ 2819,208,201.71$ LS Total sum of all Batch Plants and Conveyence Systems (Assume Equal to all other Production Equipment Costs)19,208,201.71$ Total Equipment Costs 38,416,403.43$ Total RCC cyd7,600,000Total Production Equipment Cost per Unit RCC ($/cyd)5.05$ Equipment Rental CostsRCC ProductionRCC Placement on DamRCC Equipment CostsCity Cost Index for Fairbanks, AKAssumptions / VariablesRental Rate Adjustment Factor for Unit Down TimeDaily Operation Costs
RCC PRODUCTIONQuantity15,000,000Cy11,468,300M37,600,000Cy11,468,300M3Construction season (months/year)5.5 Mn/Yr5.5 Mn/yr5.5 Mn/Yr5.5 Mn/yrConstruction seasons 5 Yr5 Yr3.00 Yr5 YrPlacing days/year165 Yr160 Yr165 Yr160 YrTotal required placing days based on avg daily placing rate825 Dy800 Dy380 Dy800 DyTotal placing days825 Dy800 Dy495 Dy800 DyΣ months25 Mn25 Mn 12.66666667 Mn25 MnNominal monthly capacity600,000Cy458,732M3600,000Cy458,732M3Average daily placing rate20,000 Cy15,291M320,000 Cy15,291M3Required daily average capacity44,920 Cy34,344M344,920 Cy34,344M3Required maximum month1,200,000 Cy917,464M31,200,000 Cy917,464M3Required nominal capacity15,000,000 Cy 11,468,300M37,600,000 Cy11,468,300M3Mixer capacity, 8 Cy6M38Cy6M3Total mix time - start charge to complete discharge, min2 Min 2 Min 2 Min 2 Minbatches/mixer/hour 30 Per Hr 30 Per hr 30 Per Hr 30 Per hrVol/mixer/hour 235 Cy 180M3235 Cy180M3Total # of mixers10 Ea10 Ea10 Ea10 EaNominal hourly production2,350 Cy1,800M32,350 Cy1,800M3Daily hours20 Hr20 Hr20 Hr20 HrNominal daily production47,000 Cy36,000M347,000 Cy36,000M3Nominal monthly1,175,000 Cy900,000M31,175,000 Cy900,000M3Ratio nominal to average1.961.961.961.96Long term average monthly600,000 Cy458,732M3600,000 Cy458,732M3Total RCC placed15,000,000 Cy 11,468,300M37,600,000 Cy11,468,300M3ParameterFull Watana RCCLow Watana RCCUS StandardMetricUS StandardMetric
11/29/2010
Appendix B
Detailed Cost Estimate
Page 1 of 61SUSITNA PROJECT ‐ LOW WATANA DAM OPTIONS COST SUMMARY(1) From HDR 200971A Engineering, Env, and Regulatory (7%)236,000,000$ 259,000,000$ 203,200,000$ 217,900,000$ 186,600,000$ 330Land and Land Rights121,000,000$ 121,000,000$ 120,900,000$ 120,900,000$ 120,900,000$ 331Power Plant Structure Improvements115,000,000$ 159,000,000$ 121,219,000$ 161,389,000$ 121,219,000$ 332.1-.4 Reservoir, Dams and tunnels1,537,690,000$ 1,718,000,000$ 1,425,110,000$ 1,472,944,000$ 1,220,892,000$ 332.5-.9 Waterways590,000,000$ 677,000,000$ 276,342,000$ 387,367,000$ 242,655,000$ 333Waterwheels, Turbines and Generators297,000,000$ 297,000,000$ 297,000,000$ 297,000,000$ 297,000,000$ 334Accessory Electrical Equipment41,000,000$ 41,000,000$ 40,000,000$ 40,000,000$ 40,000,000$ 335Misc Power Plant Equipment21,000,000$ 32,000,000$ 21,000,000$ 32,000,000$ 32,000,000$ 336Roads, Rails and Air Facilities 232,000,000$ 232,000,000$ 254,700,000$ 254,700,000$ 254,700,000$ 350-390 Transmission Features224,000,000$ 224,000,000$ 207,362,000$ 207,362,000$ 207,362,000$ 63Main Construction Camp180,000,000$ 180,000,000$ 123,800,000$ 123,800,000$ 123,800,000$ 399Other Tangible Property16,000,000$ 16,000,000$ 15,800,000$ 15,800,000$ 15,800,000$ 71BConstruction Management (4%)135,000,000$ 148,000,000$ 116,100,000$ 124,500,000$ 106,600,000$ Total Subtotal Subtotal3,745,690,000$ 4,104,000,000$ 3,222,533,000$ 3,455,662,000$ 2,969,528,000$ Total Contingency Contingency (20%)749,138,000$ 821,005,200$ 644,506,600$ 691,132,400$ 593,905,600$ TtlT t l E ti t d C t C t (Milli $)$4 500$5 000$3 900$4 200$3 600Table 4.4‐1: Cost Comparison of Selected Low Watana ICRD and RCC AlternativesLow Watana Expandable ICRD (1)Low Watana Non-Expandable ICRD (1)Total Estimated Const. Costs (Billions $)3.60FERC Line # Line Item NameLow Watana RCC - Non-ExpandableLow Watana RCC - ExpandableLow Watana RCC Gravity ArchLine Item NameLow Watana RCC - Non-ExpandableLow Watana RCC - ExpandableLow Watana RCC Gravity Arch4.50 5.00 3.90 4.20Low Watana Non-Expandable ICRD (1)Low Watana Expandable ICRD (1)Page 1 of 61Total Total Estimated Const. Costs (Million $)$4,500$5,000$3,900$4,200$3,600Page 1 of 61
Page 2 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line Price Total330Land and Land Rights0.1Land1 LS 120,870,000.00$ 120,870,000$ 0.2 Land Rights-$ 0.3 Misc Charges in Credit Above-$ -$ 121,000,000$ -$ 331Powerplant Structure Improvements-$ 0.1 Powerhouse-$ 0.11 Powerhouse and Draft Tube-$ 0.111 Excavation-$ Powerhouse Vault Rock 81,667 CY 90.12$ 7,360,000$ Draft Tube Rock 16,800 CY 90.12$ 1,510,000$ 0.113 Surface Preparation/ Grouting 0 -$ Powerhouse 66,000 SF 3.33$ 220,000$ Total Total Estimated Const. Costs (Million $) Draft Tube 51,000 SF 3.33$ 170,000$ Grout Curtain- Drill holes 29,200 LF 27.63$ 810,000$ Grout Curtain- Cement 11,667 CF 81.10$ 950,000$ 0.114 Concrete and Shot Crete 0 -$ Powerhouse Concrete 21,733 CY 692.87$ 15,060,000$ Powerhouse Concrete Overbreak 1,600 CY 447.21$ 720,000$ Powerhouse Reinforcing Steel 1,087 TON 2,858.29$ 3,110,000$ Powerhouse 4" Shotcrete 27,333 SF 10.14$ 280,000$ Draft Tube Concrete 8,000 CY 692.87$ 5,540,000$ Draft Tube Concrete Overbreak 1,667 CY 447.21$ 750,000$ Draft Tube Reinforcing Steel 660 TON 2,858.29$ 1,890,000$ Draft Tube 2" Shotcrete 4,067 SF 5.45$ 20,000$ 0.115 Support and Anchors 0 -$ Powerhouse Rockbolts 1" @ 25' Hy 647 EA 1,234.86$ 800,000$ Powerhouse Rockbolts 1" @ 15' 1,313 EA 735.81$ 970,000$ Powerhouse Steel Mesh 29,733 SF 5.81$ 170,000$ Powerhouse Steel Support 91 TON 12,671.94$ 1,160,000$ Draft Tube Rockbolts 1" @ 25' Hy 100 EA 1,234.86$ 120,000$ Draft Tube Rockbolts 1" @ 12' 260 EA 528.34$ 140,000$ Draft Tube Rockbolts 1" @ 9' 127 EA 432.12$ 50,000$ Draft Tube Steel Mesh 12,600 SF 6.55$ 80,000$ 0.117 Holes (U/S of Powerhouse) 10,000 LF 51.32$ 510,000$ Holes (Powerhouse Crown) 19,000 LF 51.32$ 980,000$ 0.118 Structural- Misc Steelwork-$ Powerhouse and Draft Tube- Steel Crane Rails 1 LS 10,276,309.00$ 10,280,000$ 0.119 Architectural- Powerhouse 1 LS 2,927,898.00$ 2,930,000$ 0.11c Mechanical -$ Draft Tube Gates4 SETS427,880.00$ 1,710,000$ Draft Tube Gate Guides4SETS202,680.00$ 810,000$ Draft Tube Crane1 LS1,140,000.00$ 1,140,000$ 0.12Access Tunnels and Portals -$ 0.121Excavation-$ Main Tunnel33,500 CY97.45$ 3,260,000$ Transformer Gallery Tunnel11,833 CY97.45$ 1,150,000$ Grouting Gallery Tunnel1,267 CY396.04$ 500,000$ Surge Chamber Access Tunnel4,833 CY145.22$ 700,000$ Penstock Access Tunnel41,000 CY145.22$ 5,950,000$ 2008 DollarsLow Watana (Non-Expandable) (4 Turbines)DescriptionHDR/AEA Susitna Hydroelectric ProjectCost Estimates based on 1982 quantitiesBy: HDRBy: Leanne Andruszkiewicz, E.I.T. Checked By: Kellen Roberts, E.I.T.Date: 10/15/2009Page 2 of 61
Page 3 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionPenstock Elbow Access Tunnel10,000 CY145.22$ 1,450,000$ Access Shaft Tunnel867 CY145.22$ 130,000$ Connector Tunnel1,267 CY379.26$ 480,000$ Portals Overburden4,000 CY17.14$ 70,000$ Portals Rock2,000 CY49.31$ 100,000$ 0.123Surface Preparation -$ Main Tunnel Slab35,400 SF2.21$ 80,000$ Penstock Access Slab43,467 SF2.21$ 100,000$ Horizontal Portal 133 SF2.30$ -$ Inclined Portal1,400 SF3.33$ -$ 0.124Concrete and Shot Crete-$ Main Portal-$ Concrete Slab20 CY406.27$ 10,000$ Concrete Walls380 CY406.27$ 150,000$ Concrete Overbreak33 CY368.48$ 10,000$ Reinforcing Steel27 TON2,887.51$ 80,000$ Tunnels-$ Concrete Slab Main Tunnel1,300 CY503.90$ 660,000$ Concrete Plugs Penstock Elbow ACC10,000 CY755.86$ 7,560,000$ Concrete Overbreak Main Tunnel 6"667 CY346.43$ 230,000$ Reinforcing Steel47 TON2,887.51$ 130,000$ 2 " Shotcrete Main Tunnel13,400 SF5.26$ 70,000$ 2 " Shotcrete Transformer Gal4,733 SF5.26$ 20,000$ 2 " Shotcrete Surge Chamber Acc2,600 SF5.26$ 10,000$ 2 " Shotcrete Penstock Access 16,467 SF5.26$ 90,000$ 2 " Shotcrete Penstock Elbow Acc4,733 SF5.26$ 20,000$ 2 " Shotcrete Access Shaft200 SF5.26$ -$ 2 " Shotcrete Grout Gallery533 SF5.26$ -$ 2 " Shotcrete Connector Tunnel533 SF5.26$ -$ 0.125Support and Anchors-$ Main Tunnel-$ Rockbolts 1" @12'800 EA528.34$ 420,000$ Rockbolts 1" @ 9'167 EA432.12$ 70,000$ Steel Mesh42,000 SF6.37$ 270,000$ Steel Support44TON12,801.49$ 560,000$ Main Tunnel Portal-$ Rockbolts 1" @15'33 EA735.79$ 20,000$ Transformer Gallery Tunnel -$ Rockbolts 1" @12'273 EA528.34$ 140,000$ Rockbolts 1" @ 9'47 EA432.12$ 20,000$ Steel Mesh15,000 SF5.89$ 90,000$ Steel Support16 TON12,801.49$ 200,000$ Grouting Gallery Tunnel-$ Rockbolts 3/4" @ 6'107 EA327.15$ 30,000$ Steel Mesh107 SF6.37$ -$ Steel Support2 TON12,801.49$ 30,000$ Surge Chamber Access Tunnel-$ Rockbolts 1" @12'153 EA528.34$ 80,000$ Rockbolts 1" @ 9'33 EA432.12$ 10,000$ Steel Mesh8,033 SF6.37$ 50,000$ Steel Support9 TON12,801.49$ 120,000$ Penstock Access Tunnel-$ Rockbolts 1" @12'953 EA528.34$ 500,000$ Rockbolts 1" @ 9'160 EA432.12$ 70,000$ Steel Mesh51,667 SF6.37$ 330,000$ Steel Support39 TON12,801.49$ 490,000$ Penstock Elbow Access Tunnel-$ Rockbolts 1" @12'280 EA528.34$ 150,000$ Page 3 of 61
Page 4 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionRockbolts 1" @ 9'80 EA432.12$ 30,000$ Steel Mesh15,000 SF6.37$ 100,000$ Steel Support20 TON12,801.49$ 260,000$ Access Shaft Tunnel-$ Rockbolts 1" @12'13 EA528.34$ 10,000$ Rockbolts 1" @ 9'13 EA432.12$ 10,000$ Steel Mesh620 SF6.37$ -$ Steel Support5 TON12,801.49$ 70,000$ Connector Tunnel-$ Rockbolts 3/4" @ 6'107 EA327.15$ 30,000$ Steel Mesh107 SF6.37$ -$ Steel Support2 TON12,801.49$ 30,000$ 0.129Architectural- Main Portal Doors2 SETS158,371.90$ 320,000$ 0.12cMechanical Ventilation System -$ 0.13Access Shaft-$ 0.131Excavation Rock9,133 CY227.67$ 2,080,000$ 0.133Surface Preparation Shaft42,667 SF3.33$ 140,000$ 0.134Concrete and Shot Crete-$ Concrete Lining2,233 CY944.82$ 2,110,000$ Concrete Overbreak 6"813 CY551.14$ 450,000$ 0.135Support and Anchors - Rockbolts 3/4" @ 6'700 EA327.15$ 230,000$ 0.138Structural Misc Steelwork33 TON7,395.00$ 250,000$ 0.139Architectural- control Building -$ 0.13cMechanical Elevators1 LS2,368,815.00$ 2,370,000$ 0.14Fire Protection Head Tank-$ 0.141Excavation767 CY588.80$ 450,000$ 0.143Surface Preparation1,867 SF2.30$ -$ 0.144Concrete & Shotcrete-$ Concrete 167 CY963.72$ 160,000$ Concrete Overbreak 6"30 CY406.27$ 10,000$ Reinforcing Steel7 TON2,858.29$ 20,000$ 0.145Support and Anchors-$ Rockbolts 1" @12'17 EA528.34$ 10,000$ Rockbolts 1" @ 9'7 EA432.12$ -$ Steel Mesh800SF6.30$ 10,000$ Steel Support2 TON12,671.95$ 30,000$ 0.148Misc Steelwork1 LS73,297.50$ 70,000$ 0.14cMechanical Piping/Valves -$ 0.15Bus Tunnels (totals for 3 Bus Tunnels)-$ 0.151Excavation-$ Rock Horizontal1,800 CY213.70$ 380,000$ Rock Inclined867 CY601.04$ 520,000$ 0.153Surface Preparation- Tunnels4,733 SF3.33$ 20,000$ 0.154Concrete and Shotcrete-$ Concrete Slab233 CY818.84$ 190,000$ Concrete Overbreak 12"167 CY472.41$ 80,000$ Reinforcing Steel12 TON2,858.29$ 30,000$ 2" Shotcrete1,467 SF5.26$ 10,000$ 0.155Supports and Anchors-$ Rockbolts 1" @ 25' 40 EA1,234.86$ 50,000$ Rockbolts 1" @ 12'93 EA528.34$ 50,000$ Rockbolts 1" @ 9'33 EA432.12$ 10,000$ Steel Mesh4,533 SF6.30$ 30,000$ Steel Support7 TON12,671.94$ 90,000$ 0.16Transformer Gallery Tunnel-$ 0.161Excavation- Rock 17,867 CY87.44$ 1,560,000$ 0.163Surface Preparation16,400 SF2.30$ 40,000$ Page 4 of 61
Page 5 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)Description0.164Concrete and Shotcrete-$ Concrete Base Slab1,600 CY1,228.27$ 1,970,000$ Concrete Overbreak 12"H/6"V513 CY377.93$ 190,000$ Reinforcing Steel80 TON2,858.29$ 230,000$ 0.165Support and Anchors-$ Rockbolts 1" @ 25' 400 EA1,234.86$ 490,000$ Rockbolts 1" @ 15'180 EA735.81$ 130,000$ Steel Mesh13,800 SF5.81$ 80,000$ Steel Support19 TON12,671.94$ 240,000$ 0.167Drainage Holes 5,533 LF47.95$ 270,000$ 0.17Cable Shafts -$ 0.171Excavation Rock2,267 CY601.04$ 1,360,000$ 0.173Surface Preparation Shafts27,600 SF3.33$ 90,000$ 0.174Concrete and Shotcrete-$ Concrete Lining693 CY1,763.66$ 1,220,000$ Concrete Overbreak 6"533 CY881.83$ 470,000$ 0.175Supports and Anchors- Rockbolts 3/4" @ 6'433 EA327.15$ 140,000$ 0.178Structural Misc Steelwork12 TON15,602.00$ 190,000$ 0.179Architectural- Enclosures1 LS199,317.00$ 200,000$ 0.17cMechanical Hoist2 EA476,960.00$ 950,000$ 0.18Dewatering (during Construction)-$ 0.181Dewatering (Power Facilities)1 LS1,336,798.50$ 1,340,000$ 0.19Instrumentation-$ 0.191Instrumentation1 LS1,714,813.50$ 1,710,000$ 0.2Misc Buildings (Control Buildings)1 LS4,433,085.00$ 4,430,000$ 0.3Permanent Town(included in 63.5)-$ 115,000,000$ 332Reservoir, Dams and Waterways-$ 0.1 Reservoir-$ 0.11 Reservoir Clearing 23,000 ACRE 3,005.85$ 69,130,000$ 0.2 Diversion Tunnels /Cofferdams-$ 0.21 Diversion Tunnels /Portals-$ 0.211 Excavation-$ Upper Tunnel-$ Rock 221,000 CY 92.33$ 20,400,000$ Lower Tunnel-$ Rock 208,000 CY 92.33$ 19,200,000$ Excavate Concrete for Plug 700 CY 96.92$ 70,000$ Upstream Upper Portal-$ Rock Usable (Face Only) 11,200 CY 49.16$ 550,000$ Upstream Lower Portal (Including Most Exc for Upper Portal)-$ Rock Usable 108,000 CY 49.16$ 5,310,000$ Rock Waste 21,750 CY 49.16$ 1,070,000$ Downstream Portals-$ Overburden 17,000 CY 17.14$ 290,000$ Rock Usable 120,000 CY 49.16$ 5,900,000$ Rock Waste 28,000 CY 49.16$ 1,380,000$ Emergency Release Chambers-$ Excavate Concrete for Plugs 1,800 CY 101.98$ 180,000$ Gate Chamber 4,700 CY 110.73$ 520,000$ Access Tunnel to Gate Chamber-$ Rock 19,100 CY 97.15$ 1,860,000$ 0.212 Fill- Temp for Coffer Dam to Construct Upstream Portals 23,000 CY 11.66$ 270,000$ 0.213 Surface Preparation \ grouting-$ Upstream Upper Portal -$ Horizontal 3,200 SF 2.30$ 10,000$ Inclined 8,600 SF 3.33$ 30,000$ Upstream Lower Portal -$ Page 5 of 61
Page 6 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionHorizontal 1,300 SF2.30$ -$ Inclined14,900 SF3.33$ 50,000$ Downstream Upper Portal-$ Horizontal 6,100 SF2.30$ 10,000$ Inclined20,500 SF3.33$ 70,000$ Downstream Lower Portal-$ Horizontal 600 SF2.30$ -$ Inclined5,600 SF3.33$ 20,000$ Grout Upper Tunnel Plugs -$ Drill Holes 4,100 LF26.76$ 110,000$ Cement820 CF81.10$ 70,000$ Grout Lower Tunnel Permanent Plugs-$ Drill Holes 2,050 LF26.76$ 50,000$ Cement410 CF81.10$ 30,000$ 0.214Concrete and Shotcrete-$ Upper Tunnel-$ Concrete Lining42,400 CY566.89$ 24,040,000$ Concrete Lining Overbreak 6"10,200 CY314.94$ 3,210,000$ Reinforcing Steel 24 TON2,887.51$ 70,000$ 2" Shotcrete56,000 SF5.26$ 290,000$ Lower Tunnel-$ Concrete Lining37,600 CY566.89$ 21,320,000$ Concrete Lining for Plug6,200 CY428.32$ 2,660,000$ Concrete Lining Overbreak 6"10,000 CY314.94$ 3,150,000$ Reinforcing Steel 24 TON2,887.51$ 70,000$ 2" Shotcrete57,900 SF5.26$ 300,000$ Upstream Upper Portal-$ Concrete Headwall 3,200 CY651.93$ 2,090,000$ Concrete Lining 1,300 CY651.93$ 850,000$ Concrete Slab 750 CY651.93$ 490,000$ Concrete Piers800 CY651.93$ 520,000$ Concrete Overbreak 12" H/6"V300 CY472.41$ 140,000$ Reinforcing Steel 400 TON2,887.51$ 1,160,000$ Upstream Lower Portal -$ Concrete Headwall 4,500CY651.93$ 2,930,000$ Concrete Lining 3,000 CY651.93$ 1,960,000$ Concrete Slab 300 CY651.93$ 200,000$ Concrete Piers700 CY651.93$ 460,000$ Concrete Overbreak 12" H/6"V350 CY472.41$ 170,000$ Reinforcing Steel 600 TON2,887.51$ 1,730,000$ Downstream Upper Portal-$ Concrete Headwall 500 CY651.93$ 330,000$ Concrete Slab 100 CY651.93$ 70,000$ Concrete Overbreak 12" H/6"V100 CY472.41$ 50,000$ Reinforcing Steel 40 TON2,887.51$ 120,000$ Downstream Lower Portal-$ Concrete Headwall 2,500 CY651.93$ 1,630,000$ Concrete Slab 100 CY651.93$ 70,000$ Concrete Overbreak 12" H/6"V150 CY472.41$ 70,000$ Reinforcing Steel 170 TON2,887.51$ 490,000$ Downstream Flip Bucket-$ Concrete Slab 800 CY651.93$ 520,000$ Concrete Walls2,300 CY651.93$ 1,500,000$ Concrete Invert1,200 CY651.93$ 780,000$ Concrete Overbreak 12" H/6"V410 CY42.41$ 20,000$ Reinforcing Steel 280 TON2,887.51$ 810,000$ Downstream Retaining Wall-$ Concrete Slab 200 CY651.93$ 130,000$ Page 6 of 61
Page 7 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionConcrete Walls2,000 CY651.93$ 1,300,000$ Concrete Overbreak 12" H/6"V110 CY472.41$ 50,000$ Reinforcing Steel 90 TON2,887.51$ 260,000$ Emergency Release Chambers-$ Concrete Plug15,300 CY755.86$ 11,560,000$ 4" Shotcrete 2,790 SF10.13$ 30,000$ Access Tunnel to Gate Chamber-$ 2" Shotcrete 12,800 SF5.26$ 70,000$ 0.215Supports and Anchors-$ Lower Tunnel-$ Rockbolts 1" @ 12'3,650 EA528.34$ 1,930,000$ Rockbolts 1" @ 9'620 EA432.12$ 270,000$ Steel Mesh217,100 SF6.37$ 1,380,000$ Steel Support220 TON12,801.49$ 2,820,000$ Upper Tunnel-$ Rockbolts 1" @ 12'3,530 EA528.34$ 1,870,000$ Rockbolts 1" @ 9'600 EA432.12$ 260,000$ Steel Mesh210,200 SF6.37$ 1,340,000$ Steel Support213 TON12,801.49$ 2,730,000$ Upstream Lower Portal-$ Rockbolts 1" @ 15'240 EA735.81$ 180,000$ Anchors 1" @ 25'290 EA1,234.86$ 360,000$ Upstream Upper Portal -$ Rockbolts 1" @ 15'-$ Anchors 1" @ 25'130 EA735.81$ 100,000$ Downstream Lower Portal-$ Rockbolts 1" @ 15'200 EA735.81$ 150,000$ Downstream Upper Portal-$ Rockbolts 1" @ 15'100 EA735.81$ 70,000$ Retaining Wall Anchors 1" @25'100 EA1,234.86$ 120,000$ Emergency Release Chambers-$ Rockbolts 1" @ 25'100 EA1,234.86$ 120,000$ Rockbolts 1" @ 15'125 EA735.77$ 90,000$ Steel Mesh3,600 SF6.37$ 20,000$ Steel Support14TON12,801.49$ 180,000$ Metal to Roof Anchors 3/4" @ 6'20 EA342.42$ 10,000$ Access Tunnel to Gate Chamber-$ Rockbolts 1" @ 12'775 EA528.34$ 410,000$ Rockbolts 1" @ 9'240 EA432.12$ 100,000$ Steel Mesh39,900 SF6.37$ 250,000$ Steel Support55 TON12,801.49$ 700,000$ 0.218Structural- Misc Steelwork2,775 SF93.61$ 260,000$ 0.21cMechanical-$ Upstream Lower Gates-$ Gate Equipment2 EA5,073,120.00$ 10,150,000$ Upstream Upper Gates-$ Gate Equipment2 EA2,840,080.00$ 5,680,000$ Trashracks1 LS1,777,500.00$ 1,780,000$ Downstream Lower Outlet -$ Stoplog Guides 1 LS142,200.00$ 140,000$ Stoplogs includes follower1 LS1,967,100.00$ 1,970,000$ Downstream Upper Outlet -$ Stoplog Guides 1 LS82,950.00$ 80,000$ Low Level Release-$ Slide Gates Include Steel Liner9 EA3,517,470.00$ 31,660,000$ -$ 0.22Upstream Cofferdam -$ 0.221Excavation-$ Page 7 of 61
Page 8 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionOverburden Removal1,000 CY11.56$ 10,000$ 0.222Fill-$ Rock Fill38,400 CY10.90$ 420,000$ Fine Filter16,600 CY36.84$ 610,000$ Coarse Filter15,900 CY30.05$ 480,000$ Rock Shell196,500 CY10.50$ 2,060,000$ Closure Dike58,500 CY10.90$ 640,000$ Rip Rap21,200 CY24.26$ 510,000$ 0.223Cutoff Slurry Wall-$ excavation4,850 CY4.88$ 20,000$ slurry wall43,600 SF72.44$ 3,160,000$ 0.22dDewatering -$ Initial Dewatering 1 LS5,807,685.00$ 5,810,000$ Dewatering Maintenance1 LS22,377,990.00$ 22,380,000$ 0.23Down Stream Cofferdam-$ 0.231Excavation-$ overburden5,000 CY11.56$ 60,000$ Rock 500 CY9.91$ -$ Removal of Cofferdam14,500 CY13.48$ 200,000$ 0.232 Fill-$ Rip Rap1,800 CY24.26$ 40,000$ Closure Dike15,200 CY10.90$ 170,000$ 0.233 Cutoff Slurry Wall-$ Excavation 1,830 CY4.60$ 10,000$ Slurry Wall16,500 SF72.44$ 1,200,000$ 0.3Main Dam-$ 0.31Main Dam-$ 0.311Excavation-$ Overburden above el. 14702,026,000 CY11.53$ 23,360,000$ Overburden below el. 14705,320,000 CY11.06$ 58,840,000$ Rock Usable above el. 14701,289,000 CY43.03$ 55,470,000$ Rock Usable below el. 1470478,000 CY43.72$ 20,900,000$ Rock Waste above el. 14701,950,000 CY43.03$ 83,910,000$ Rock Waste below el. 1470869,500CY50.18$ 43,630,000$ 0.312Fill- Estimated from Attatched Calculations-$ Rip Rap (upstream)409,000 CY23.30$ 9,530,000$ Gravel (upstream)6,659,000 CY20.56$ 136,910,000$ Coarse Filter (upstream)925,759 CY28.86$ 26,720,000$ Fine Filter (upstream)1,045,588 CY37.91$ 39,640,000$ Core (impervious)6,300,000 CY25.37$ 159,830,000$ Fine Filter (downstream)1,171,412 CY37.91$ 44,410,000$ Coarse Filter (downstream)1,074,241 CY28.86$ 31,000,000$ Shell- Rock and Gravel2,998,209 CY19.18$ 57,510,000$ Shell- Rock From Other Sources1,445,000 CY10.09$ 14,580,000$ Cobbles (downstream Face)530,000 CY16.35$ 8,670,000$ Road Base12,000 CY34.42$ 410,000$ Frost Protection-$ Process Protection 960,000 CY10.31$ 9,900,000$ Place Protection960,000 CY3.29$ 3,160,000$ Remove 1' Protect and Waste93,000 CY7.21$ 670,000$ Scarify Core Surface 193 ACRE858.77$ 170,000$ Filter Fabric-$ Filter Fabric592,000 SF0.88$ 520,000$ 0.313Surface Prep/ Grouting-$ Surface Preparation-$ Under Core/Filters above el. 15001,340,000 SF3.11$ 4,170,000$ Under Core/Filters below el. 1500490,000 SF3.11$ 1,520,000$ Under Shell above el. 15004,149,000 SF2.15$ 8,920,000$ Page 8 of 61
Page 9 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionUnder Shell below el. 15002,067,000 SF2.15$ 4,440,000$ Consolidation Grout-$ Drill Holes 550,000 LF11.91$ 6,550,000$ Cement550,000 CF67.81$ 37,300,000$ Grout Curtain-$ Drill Holes 372,000 LF26.76$ 9,950,000$ Cement149,000 CF81.10$ 12,080,000$ Dental Concrete-$ Dental Concrete68,000 CY365.33$ 24,840,000$ 0.317Drainage-$ Holes109,000 LF51.32$ 5,590,000$ 0.32Grout Galleries/Portals -$ 0.321Excavation-$ Tunnels/ Shafts- Core Area-$ Rock Horizontal8,100 CY394.80$ 3,200,000$ Rock Inclined9,000 CY552.93$ 4,980,000$ Rock Vertical1,600 CY536.19$ 860,000$ Tunnels/ Shafts- Access -$ Rock Horizontal10,400 CY394.80$ 4,110,000$ Rock Inclined1,600 CY552.93$ 880,000$ Portals -$ Overburden Rock2,900 CY17.16$ 50,000$ Rock800 CY49.16$ 40,000$ 0.323Surface Preparation-$ Portals -$ Horizontal 24 SF2.30$ -$ Inclined160 SF3.33$ -$ -$ 0.324Concrete and Shotcrete-$ Tunnels- Core Area-$ Concrete Plugs800 CY428.32$ 340,000$ Concrete Slab1,800 CY944.82$ 1,700,000$ Concrete Overbreak 6"920 CY755.86$ 700,000$ Reinforcing Steel64 TON2,887.51$ 180,000$ 2" Shotcrete12,000 SF5.26$ 60,000$ Tunnels-Access-$ Concrete Slab1,280CY944.82$ 1,210,000$ Concrete Overbreak 6"640 CY755.86$ 480,000$ Reinforcing Steel48 TON2,887.51$ 140,000$ 2" Shotcrete4,300 SF5.26$ 20,000$ Shafts-$ 2" Shotcrete4,000 SF5.26$ 20,000$ Portals -$ Concrete16 CY406.36$ 10,000$ Reinforcing Steel2 TON2,887.51$ -$ 0.325Support and Anchors-$ Tunnels- Core Area-$ Rockbolts 3/4" @6'1,400 EA327.15$ 460,000$ Steel Mesh2,400 SF5.37$ 10,000$ Steel Support16 TON12,801.49$ 200,000$ Tunnels- Access-$ Rockbolts 3/4" @6'960 EA327.15$ 310,000$ Steel Mesh880 SF5.37$ -$ Steel Support16 TON12,801.49$ 200,000$ Shafts -$ Rockbolts 3/4" @6'280 EA327.15$ 90,000$ Steel Mesh800 SF5.37$ -$ Portals -$ Page 9 of 61
Page 10 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionRockbolts 1" @15'24 EA735.81$ 20,000$ 0.329Architectural Portal Doors-$ Portal Doors1 LS33,900.00$ 30,000$ 0.33Instrumentation -$ 0.331Instrumentation1 LS17,315,220.00$ 17,320,000$ 0.4Relict Channel-$ 0.41Shore Protection -$ 0.411Excavation -$ Overburden Stripping 2' thick2,200 CY11.56$ 30,000$ 0.412Fill -$ Dump and Spread-$ Filter Material - 2' layer2,200 CY31.93$ 70,000$ Rock Spalls/ Rip Rap- 3' Ave3,300 CY9.86$ 30,000$ Shore Protection -$ Rip Rap24,000 CY24.26$ 580,000$ Waste Rock24,000 CY22.78$ 550,000$ 0.44Channel Filter Blanket-$ 0.442Fill-$ Coarse Filter 2,900,000 CY33.85$ 98,170,000$ Fine Filter 2,180,000 CY43.65$ 95,160,000$ Rip Rap182,000 CY24.26$ 4,420,000$ 0.443Surface preparation-$ Foundation Prep -$ Clearing and Grubbing 460 ACRE3,963.11$ 1,820,000$ Excavation2,236,000 CY15.62$ 34,930,000$ 0.5Outlet Facilities1,537,690,000$ 0.51Outlet Facilities- (Intake Civil Work Include in Power Intake )1 LS73,000,000$ 73,000,000$ 0.52Main (Chute ) Spillway (Includes Civil Works for Outlet Facilities)1 LS182,000,000$ 182,000,000$ 0.53Emergency Spillway1 LS164,000,000$ 164,000,000$ 0.6Power Intake (Inc Inlet exec and Inlet Structure Civil Works for Outlet)1 LS97,000,000$ 97,000,000$ 0.7Surge Chamber1 LS17,000,000$ 17,000,000$ 0.81Head Race (Based on Penstock costs1 LS28,000,000$ 28,000,000$ 0.82Penstocks1 LS17,000,000$ 17,000,000$ 0.9Tailrace Works (1 Portal with Combined Tailrace/Diversion Tunnel)1LS12,000,000$ 12,000,000$ 590,000,000$ 333Waterwheels, Turbines and Generators0.11Turbines and Governors0.111Supply0.112Install0.2Generators and Exciters 0.21Generators and Exciters (Supply and Install)0.211Generators and Exciters0.3Total Bid From Vendor (includes all equipment in this category)4 EA74,200,000.00$ 297,000,000$ 297,000,000$ Average from acquired quotes334Accessory Electrical Equipment0.1Connections, Supports and Structures 0.11Structures0.111Structures (included Below)0.12Conductors and Insulators0.121Generator Isolated Phase Bus1 LS3,792,000.00$ 3,790,000$ 0.122 HV Power Cables and Accessories 1 LS 1,540,500.00$ 1,540,000$ 0.123 LV Power Cables and Accessories 1 LS 711,000.00$ 710,000$ 0.124 Control Cables and Accessories 1 LS 1,303,500.00$ 1,300,000$ 0.125 Grounding System 1 LS 177,750.00$ 180,000$ 0.13 Conduits and Fittings0.131 Conduits and Fittings 1 LS 474,000.00$ 470,000$ Page 10 of 61
Page 11 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)Description0.2Switchgear and Control Equipment0.21Auxiliary Transformers0.211Auxiliary Transformers4 EA83,811$ 340,000$ 0.22Circuit Breakers Generators-$ 0.221Circuit Breakers Generators4 EA1,504,300$ 6,020,000$ 0.23Surge Protectors and Generator Cubicles-$ -$ 0.231Surge Protectors and Generator Cubicles4 EA50,000.00$ 200,000$ 0.24Switch boards-$ -$ 0.241Switch boards1 LS924,300.00$ 920,000$ 0.25Auxiliary Power Equipment-$ -$ 0.251Auxiliary Power Equipment4 EA100,000$ 400,000$ 0.3Cubicles and Appurtenances-$ 0.31Control, relay and meter boards-$ 0.311Control, relay and meter boards4 EA200,000$ 800,000$ 0.32Computer Control System-$ -$ 0.321Computer Control System-$ -$ 0.33Supervisor and Telemeter System-$ -$ 0.331Supervisor and Telemeter System-$ -$ -$ -$ 0.4Power Transformers -$ -$ 0.41Power Transformers -$ -$ 0.411Power Transformers 7 EA2,571,429$ 18,000,000$ -$ -$ 0.5Lighting System-$ 0.51Powerhouse and Transformer Gallery-$ 0.511Powerhouse and Transformer Gallery1 LS1,824,900.00$ 1,820,000$ 0.52Access Tunnels and Roads-$ 0.521Access Tunnels and Roads1 LS402,900.00$ 400,000$ -$ 0.6Misc. Electrical Equipment-$ 0.61Misc. Electrical Equipment-$ 0.611Misc. Electrical Equipment1 LS625,680.00$ 630,000$ -$ 0.7Surface Accessory Equipment-$ 0.7134.5 kV and LV Equipment-$ 0.711Switchboard1 LS213,300$ 210,000$ 0.712Cables1 LS450,300$ 450,000$ 0.713Aux Transformers 1 LS284,400$ 280,000$ 0.73Diesel Generator- Standby -$ 0.731Diesel Generator- Standby 2 EA347,550$ 700,000$ 0.74Exterior Lighting -$ 0.741Exterior Lighting 1 LS355,500$ 360,000$ 0.75Mimic Board- Control Building-$ 0.751Mimic Board- Control Building1 LS1,185,000$ 1,190,000$ -$ 41,000,000$ 335Misc Powerplant Equipment-$ 0.1 Auxiliary Systems- Underground-$ 0.11 Station Water Systems-$ 0.111 Station Water Systems 1 LS 2,488,500.00$ 2,490,000$ 0.12 Fire Protection Systems-$ -$ 0.121 Fire Protection Systems 1 LS 1,422,000.00$ 1,420,000$ 0.13 Compressed Air Systems -$ -$ 0.131 Compressed Air Systems 1 LS 1,777,500.00$ 1,780,000$ 0.14 Oil Handling Systems-$ -$ 0.141 Oil Handling Systems 1 LS 1,185,000.00$ 1,190,000$ 0.15 Drainage & Dewatering -$ -$ 0.151 Drainage & Dewatering 2 EA 1,738,000$ 3,480,000$ 0.16 Heating, Ventilation and Cooling System-$ -$ Page 11 of 61
Page 12 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)Description0.161Heating, Ventilation and Cooling System1 LS1,777,500.00$ 1,780,000$ 0.17Miscellaneous-$ -$ 0.171Miscellaneous1 LS1,185,000.00$ 1,190,000$ 0.2Auxiliary Systems- Surface Facilities-$ -$ 0.21Auxiliary Systems- Surface Facilities-$ -$ 0.211Auxiliary Systems- Surface Facilities1 LS711,000$ 710,000$ 0.3Auxiliary Equipment-$ -$ 0.31Powerhouse Cranes -$ -$ 0.311Powerhouse Cranes 2 EA1,800,000$ 3,600,000$ 0.32Elevators -$ -$ 0.321Elevators 2 EA181,700$ 360,000$ 0.33Miscellaneous Cranes and Hoists-$ -$ 0.331Miscellaneous Cranes and Hoists1 LS505,500$ 510,000$ 0.34Machine Shop Equipment-$ -$ 0.341Machine Shop Equipment1 LS2,022,000$ 2,020,000$ 0.4General Station Equipment -$ -$ 0.5Communications Equipment1 LS106,650.00$ 110,000$ -$ 21,000,000$ 336Roads, Rails and Air Facilities -$ 0.1 Roads 0.11 Permanent RoadsCost of road upgrades for 23 mi of Denali Highway 23 Mi 1,000,000.00$ 23,000,000.00$ Cost of New road to 42 Mi of road to Watana 42 Mi 3,000,000.00$ 126,000,000.00$ 0.131 Site RoadsConstruction RoadsSite Roads20 Mile 750,000.00$ 15,000,000$ Maintenance141 MI/YRS 223,092.85$ 31,500,000$ 0.132 Permanent RoadsPermanent Roads 6 Mile 1,287,997.42$ 7,700,000$ 0.2 Rail 0.1 Railhead at Cantwell 1 LS 14,000,000.00$ 14,000,000$ 0.3 Airstrip0.31 AirstripPermanent Airstrip 1 LS 13,000,000.00$ 13,000,000$ Temporary Airstrip 1 LS 2,000,000.00$ 2,000,000$ 232,000,000$ 350‐359Transmission Plant33 MILE5,700,000.00$ 188,100,000.00$ 2EA18,000,000.00$ 36,000,000.00$ 224,000,000.00$ General Plant389Land and Land RightsLand and Land Rights(incl in 330)390Structures and ImprovementsStructures and Improvements(incl in 331.2)391Office Furniture and EquipmentOffice Furniture and Equipment(incl in 399)392Transportation EquipmentTransportation Equipment(incl in 399)393Stores EquipmentPage 12 of 61
Page 13 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Non-Expandable) (4 Turbines)DescriptionStores Equipment(incl in 399)394Tools Shop and Garage EquipmentTools Shop and Garage Equipment(incl in 399)395Laboratory EquipmentLaboratory Equipment(incl in 399)396Power-Operated EquipmentPower-Operated Equipment(incl in 399)397Communications EquipmentCommunications Equipment(incl in 399)398Miscellaneous EquipmentMiscellaneous Equipment(incl in 399)399Other Tangible PropertyOther Tangible Property1 LS 16,000,000$ 16,000,000$ Saved Maintenance1 LS (231,220)$ (230,000)$ -$ 16,000,000$ Indirect Costs61Temporary Construction FacilitiesTemporary Construction Facilities(incl in direct costs)62Construction Equipment Construction Equipment(incl in direct costs)63Main Construction Camp 0.1Main Construction Camp1 LS180,000,000$ 180,000,000$ 180,000,000$ 64Labor ExpenseLabor Expense65SuperintendenceSuperintendence66InsuranceInsurance68Mitigation Fishery, Terrestrial and Recreational)- Not Included69FeesFeesSubtotalContingency (20%)1 LS749,200,000.00$ 749,000,000$ Subtotal71Engineering (4%), Environmental (2%), Regulatory(1%)1 LS236,000,000.00$ 236,000,000$ 71aConstruction Management (4%)1 LS135,000,000.00$ 135,000,000$ 72Legal Expenses75Taxes76Administrative & Gen. Expenses77Interest80Earnings/Expenses During ConstructionTotal Project Cost4,495,000,000$ Max Plant Capacity 600Page 13 of 61
Page 14 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line Price Total330Land and Land Rights0.1Land1 LS 120,870,000$ 120,870,000$ 0.2 Land Rights-$ 0.3 Misc Charges in Credit Above-$ -$ 121,000,000$ -$ 331Powerplant Structure Improvements-$ 0.1 Powerhouse-$ 0.11 Powerhouse and Draft Tube-$ 0.111 Excavation-$ Powerhouse Vault Rock 122,500 CY 90$ 11,040,000$ Draft Tube Rock 25,200 CY 90$ 2,270,000$ 0.113 Surface Preparation/ Grouting-$ Powerhouse 99,000 SF 3$ 330,000$ Total Total Estimated Const. Costs (Million $) Draft Tube 76,500 SF 3$ 250,000$ Grout Curtain- Drill holes 43,800 LF 28$ 1,210,000$ Grout Curtain- Cement 17,500 CF 81$ 1,420,000$ 0.114 Concrete and Shot Crete-$ Powerhouse Concrete 32,600 CY 693$ 22,590,000$ Powerhouse Concrete Overbreak 2,400 CY 447$ 1,070,000$ Powerhouse Reinforcing Steel 1,630 TON 2,858$ 4,660,000$ Powerhouse 4" Shotcrete 41,000 SF 10$ 420,000$ Draft Tube Concrete 12,000 CY 693$ 8,310,000$ Draft Tube Concrete Overbreak 2,500 CY 447$ 1,120,000$ Draft Tube Reinforcing Steel 990 TON 2,858$ 2,830,000$ Draft Tube 2" Shotcrete 6,100 SF 5$ 30,000$ 0.115 Support and Anchors-$ Powerhouse Rockbolts 1" @ 25' Hy 970 EA 1,235$ 1,200,000$ Powerhouse Rockbolts 1" @ 15' 1,970 EA 736$ 1,450,000$ Powerhouse Steel Mesh 44,600 SF 6$ 260,000$ Powerhouse Steel Support 137 TON 12,672$ 1,740,000$ Draft Tube Rockbolts 1" @ 25' Hy 150 EA 1,235$ 190,000$ Draft Tube Rockbolts 1" @ 12' 390 EA 528$ 210,000$ Draft Tube Rockbolts 1" @ 9' 190 EA 432$ 80,000$ Draft Tube Steel Mesh 18,900 SF 7$ 120,000$ 0.117 Holes (U/S of Powerhouse) 15,000 LF 51$ 770,000$ Holes (Powerhouse Crown) 28,500 LF 51$ 1,460,000$ 0.118 Structural- Misc Steelwork-$ Powerhouse and Draft Tube- Steel Crane Rails 1 LS 10,276,309$ 10,280,000$ 0.119 Architectural- Powerhouse 1 LS 2,927,898$ 2,930,000$ 0.11cMechanical -$ Draft Tube Gates4SETS427,880$ 1,710,000$ Draft Tube Gate Guides6 SETS202,680$ 1,220,000$ Draft Tube Crane1 LS1,140,000$ 1,140,000$ 0.12Access Tunnels and Portals -$ 0.121Excavation-$ Main Tunnel50,250 CY97$ 4,900,000$ Transformer Gallery Tunnel17,750 CY97$ 1,730,000$ Grouting Gallery Tunnel1,900 CY396$ 750,000$ Surge Chamber Access Tunnel7,250 CY145$ 1,050,000$ Penstock Access Tunnel61,500 CY145$ 8,930,000$ 2008 DollarsLow Watana (Expandable) (4 Turbines)DescriptionHDR/AEA Susitna Hydroelectric ProjectCost Estimates based on 1982 quantitiesBy: HDRBy: Leanne Andruszkiewicz, E.I.T. Checked By: Kellen Roberts, E.I.T.Date: 10/15/2009Page 14 of 61
Page 15 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionPenstock Elbow Access Tunnel15,000 CY145$ 2,180,000$ Access Shaft Tunnel1,300 CY145$ 190,000$ Connector Tunnel1,900 CY379$ 720,000$ Portals Overburden6,000 CY17$ 100,000$ Portals Rock3,000 CY49$ 150,000$ 0.123Surface Preparation -$ Main Tunnel Slab53,100 SF2$ 120,000$ Penstock Access Slab65,200 SF2$ 140,000$ Horizontal Portal 200 SF2$ -$ Inclined Portal2,100 SF3$ 10,000$ 0.124Concrete and Shot Crete-$ Main Portal-$ Concrete Slab30 CY406$ 10,000$ Concrete Walls570 CY406$ 230,000$ Concrete Overbreak50 CY368$ 20,000$ Reinforcing Steel40 TON2,888$ 120,000$ Tunnels-$ Concrete Slab Main Tunnel1,950 CY504$ 980,000$ Concrete Plugs Penstock Elbow ACC15,000 CY756$ 11,340,000$ Concrete Overbreak Main Tunnel 6"1,000 CY346$ 350,000$ Reinforcing Steel70 TON2,888$ 200,000$ 2 " Shotcrete Main Tunnel20,100 SF5$ 110,000$ 2 " Shotcrete Transformer Gal7,100 SF5$ 40,000$ 2 " Shotcrete Surge Chamber Acc3,900 SF5$ 20,000$ 2 " Shotcrete Penstock Access 24,700 SF5$ 130,000$ 2 " Shotcrete Penstock Elbow Acc7,100 SF5$ 40,000$ 2 " Shotcrete Access Shaft300 SF5$ -$ 2 " Shotcrete Grout Gallery800 SF5$ -$ 2 " Shotcrete Connector Tunnel800 SF5$ -$ 0.125Support and Anchors-$ Main Tunnel-$ Rockbolts 1" @12'1,200 EA528$ 630,000$ Rockbolts 1" @ 9'250 EA432$ 110,000$ Steel Mesh63,000 SF6$ 400,000$ Steel Support66TON12,801$ 840,000$ Main Tunnel Portal-$ Rockbolts 1" @15'50 EA736$ 40,000$ Transformer Gallery Tunnel -$ Rockbolts 1" @12'410 EA528$ 220,000$ Rockbolts 1" @ 9'70 EA432$ 30,000$ Steel Mesh22,500 SF6$ 130,000$ Steel Support24 TON12,801$ 310,000$ Grouting Gallery Tunnel-$ Rockbolts 3/4" @ 6'160 EA327$ 50,000$ Steel Mesh160 SF6$ -$ Steel Support2 TON12,801$ 30,000$ Surge Chamber Access Tunnel-$ Rockbolts 1" @12'230 EA528$ 120,000$ Rockbolts 1" @ 9'50 EA432$ 20,000$ Steel Mesh12,050 SF6$ 80,000$ Steel Support14 TON12,801$ 180,000$ Penstock Access Tunnel-$ Rockbolts 1" @12'1,430 EA528$ 760,000$ Rockbolts 1" @ 9'240 EA432$ 100,000$ Steel Mesh77,500 SF6$ 490,000$ Steel Support58 TON12,801$ 740,000$ Penstock Elbow Access Tunnel-$ Rockbolts 1" @12'420 EA528$ 220,000$ Page 15 of 61
Page 16 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionRockbolts 1" @ 9'120 EA432$ 50,000$ Steel Mesh22,500 SF6$ 140,000$ Steel Support30 TON12,801$ 380,000$ Access Shaft Tunnel-$ Rockbolts 1" @12'20 EA528$ 10,000$ Rockbolts 1" @ 9'20 EA432$ 10,000$ Steel Mesh930 SF6$ 10,000$ Steel Support8 TON12,801$ 100,000$ Connector Tunnel-$ Rockbolts 3/4" @ 6'160 EA327$ 50,000$ Steel Mesh160 SF6$ -$ Steel Support2 TON12,801$ 30,000$ 0.129Architectural- Main Portal Doors2 SETS158,372$ 320,000$ 0.12cMechanical Ventilation System -$ 0.13Access Shaft-$ 0.131Excavation Rock13,700 CY228$ 3,120,000$ 0.133Surface Preparation Shaft64,000 SF3$ 210,000$ 0.134Concrete and Shot Crete-$ Concrete Lining3,350 CY945$ 3,170,000$ Concrete Overbreak 6"1,220 CY551$ 670,000$ 0.135Support and Anchors - Rockbolts 3/4" @ 6'1,050 EA327$ 340,000$ 0.138Structural Misc Steelwork50 TON7,395$ 370,000$ 0.139Architectural- control Building -$ 0.13cMechanical Elevators1 LS2,368,815$ 2,370,000$ 0.14Fire Protection Head Tank-$ 0.141Excavation1,150 CY589$ 680,000$ 0.143Surface Preparation2,800 SF2$ 10,000$ 0.144Concrete & Shotcrete-$ Concrete 250 CY964$ 240,000$ Concrete Overbreak 6"45 CY406$ 20,000$ Reinforcing Steel10 TON2,858$ 30,000$ 0.145Support and Anchors-$ Rockbolts 1" @12'25 EA528$ 10,000$ Rockbolts 1" @ 9'10 EA432$ -$ Steel Mesh1,200SF6$ 10,000$ Steel Support2 TON12,672$ 30,000$ 0.148Misc Steelwork1 LS73,298$ 70,000$ 0.14cMechanical Piping/Valves -$ 0.15Bus Tunnels (totals for 3 Bus Tunnels)-$ 0.151Excavation-$ Rock Horizontal2,700 CY214$ 580,000$ Rock Inclined1,300 CY601$ 780,000$ 0.153Surface Preparation- Tunnels7,100 SF3$ 20,000$ 0.154Concrete and Shotcrete-$ Concrete Slab350 CY819$ 290,000$ Concrete Overbreak 12"250 CY472$ 120,000$ Reinforcing Steel18 TON2,858$ 50,000$ 2" Shotcrete2,200 SF5$ 10,000$ 0.155Supports and Anchors-$ Rockbolts 1" @ 25' 60 EA1,235$ 70,000$ Rockbolts 1" @ 12'140 EA528$ 70,000$ Rockbolts 1" @ 9'50 EA432$ 20,000$ Steel Mesh6,800 SF6$ 40,000$ Steel Support11 TON12,672$ 140,000$ 0.16Transformer Gallery Tunnel-$ 0.161Excavation- Rock 26,800 CY87$ 2,340,000$ 0.163Surface Preparation24,600 SF2$ 60,000$ Page 16 of 61
Page 17 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)Description0.164Concrete and Shotcrete-$ Concrete Base Slab2,400 CY1,228$ 2,950,000$ Concrete Overbreak 12"H/6"V770 CY378$ 290,000$ Reinforcing Steel120 TON2,858$ 340,000$ 0.165Support and Anchors-$ Rockbolts 1" @ 25' 600 EA1,235$ 740,000$ Rockbolts 1" @ 15'270 EA736$ 200,000$ Steel Mesh20,700 SF6$ 120,000$ Steel Support29 TON12,672$ 370,000$ 0.167Drainage Holes 8,300 LF48$ 400,000$ 0.17Cable Shafts -$ 0.171Excavation Rock3,400 CY601$ 2,040,000$ 0.173Surface Preparation Shafts41,400 SF3$ 140,000$ 0.174Concrete and Shotcrete-$ Concrete Lining1,040 CY1,764$ 1,830,000$ Concrete Overbreak 6"800 CY882$ 710,000$ 0.175Supports and Anchors- Rockbolts 3/4" @ 6'650 EA327$ 210,000$ 0.178Structural Misc Steelwork18 TON15,602$ 280,000$ 0.179Architectural- Enclosures1 LS199,317$ 200,000$ 0.17cMechanical Hoist2 EA476,960$ 950,000$ 0.18Dewatering (during Construction)-$ 0.181Dewatering (Power Facilities)1 LS1,336,799$ 1,340,000$ 0.19Instrumentation-$ 0.191Instrumentation1 LS1,714,814$ 1,710,000$ 0.2Misc Buildings (Control Buildings)1 LS4,433,085$ 4,430,000$ 0.3Permanent Town(included in 63.5)-$ 159,000,000$ 332Reservoir, Dams and Waterways-$ 0.1 Reservoir-$ 0.11 Reservoir Clearing 23,000 ACRE 3,006$ 69,130,000$ 0.2 Diversion Tunnels /Cofferdams-$ 0.21 Diversion Tunnels /Portals-$ 0.211 Excavation-$ Upper Tunnel-$ Rock 221,000 CY 92$ 20,400,000$ Lower Tunnel-$ Rock 208,000 CY 92$ 19,200,000$ Excavate Concrete for Plug 700 CY 97$ 70,000$ Upstream Upper Portal-$ Rock Usable (Face Only) 11,200 CY 49$ 550,000$ Upstream Lower Portal (Including Most Excav. for Upper Portal)-$ Rock Usable 108,000 CY 49$ 5,310,000$ Rock Waste 21,750 CY 49$ 1,070,000$ Downstream Portals-$ Overburden 17,000 CY 17$ 290,000$ Rock Usable 120,000 CY 49$ 5,900,000$ Rock Waste 28,000 CY 49$ 1,380,000$ Emergency Release Chambers-$ Excavate Concrete for Plugs 1,800 CY 102$ 180,000$ Gate Chamber 4,700 CY 111$ 520,000$ Access Tunnel to Gate Chamber-$ Rock 19,100 CY 97$ 1,860,000$ 0.212 Fill- Temp for Coffer Dam to Construct Upstream Portals 23,000 CY 12$ 270,000$ 0.213 Surface Preparation \ grouting-$ Upstream Upper Portal -$ Horizontal 3,200 SF 2$ 10,000$ Inclined 8,600 SF 3$ 30,000$ Upstream Lower Portal -$ Page 17 of 61
Page 18 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionHorizontal 1,300 SF2$ -$ Inclined14,900 SF3$ 50,000$ Downstream Upper Portal-$ Horizontal 6,100 SF2$ 10,000$ Inclined20,500 SF3$ 70,000$ Downstream Lower Portal-$ Horizontal 600 SF2$ -$ Inclined5,600 SF3$ 20,000$ Grout Upper Tunnel Plugs -$ Drill Holes 4,100 LF27$ 110,000$ Cement820 CF81$ 70,000$ Grout Lower Tunnel Permanent Plugs-$ Drill Holes 2,050 LF27$ 50,000$ Cement410 CF81$ 30,000$ 0.214Concrete and Shotcrete-$ Upper Tunnel-$ Concrete Lining42,400 CY567$ 24,040,000$ Concrete Lining Overbreak 6"10,200 CY315$ 3,210,000$ Reinforcing Steel 24 TON2,888$ 70,000$ 2" Shotcrete56,000 SF5$ 290,000$ Lower Tunnel-$ Concrete Lining37,600 CY567$ 21,320,000$ Concrete Lining for Plug6,200 CY428$ 2,660,000$ Concrete Lining Overbreak 6"10,000 CY315$ 3,150,000$ Reinforcing Steel 24 TON2,888$ 70,000$ 2" Shotcrete57,900 SF5$ 300,000$ Upstream Upper Portal-$ Concrete Headwall 3,200 CY652$ 2,090,000$ Concrete Lining 1,300 CY652$ 850,000$ Concrete Slab 750 CY652$ 490,000$ Concrete Piers800 CY652$ 520,000$ Concrete Overbreak 12" H/6"V300 CY472$ 140,000$ Reinforcing Steel 400 TON2,888$ 1,160,000$ Upstream Lower Portal -$ Concrete Headwall 4,500CY652$ 2,930,000$ Concrete Lining 3,000 CY652$ 1,960,000$ Concrete Slab 300 CY652$ 200,000$ Concrete Piers700 CY652$ 460,000$ Concrete Overbreak 12" H/6"V350 CY472$ 170,000$ Reinforcing Steel 600 TON2,888$ 1,730,000$ Downstream Upper Portal-$ Concrete Headwall 500 CY652$ 330,000$ Concrete Slab 100 CY652$ 70,000$ Concrete Overbreak 12" H/6"V100 CY472$ 50,000$ Reinforcing Steel 40 TON2,888$ 120,000$ Downstream Lower Portal-$ Concrete Headwall 2,500 CY652$ 1,630,000$ Concrete Slab 100 CY652$ 70,000$ Concrete Overbreak 12" H/6"V150 CY472$ 70,000$ Reinforcing Steel 170 TON2,888$ 490,000$ Downstream Flip Bucket-$ Concrete Slab 800 CY652$ 520,000$ Concrete Walls2,300 CY652$ 1,500,000$ Concrete Invert1,200 CY652$ 780,000$ Concrete Overbreak 12" H/6"V410 CY42$ 20,000$ Reinforcing Steel 280 TON2,888$ 810,000$ Downstream Retaining Wall-$ Concrete Slab 200 CY652$ 130,000$ Page 18 of 61
Page 19 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionConcrete Walls2,000 CY652$ 1,300,000$ Concrete Overbreak 12" H/6"V110 CY472$ 50,000$ Reinforcing Steel 90 TON2,888$ 260,000$ Emergency Release Chambers-$ Concrete Plug15,300 CY756$ 11,560,000$ 4" Shotcrete 2,790 SF10$ 30,000$ Access Tunnel to Gate Chamber-$ 2" Shotcrete 12,800 SF5$ 70,000$ 0.215Supports and Anchors-$ Lower Tunnel-$ Rockbolts 1" @ 12'3,650 EA528$ 1,930,000$ Rockbolts 1" @ 9'620 EA432$ 270,000$ Steel Mesh217,100 SF6$ 1,380,000$ Steel Support220 TON12,801$ 2,820,000$ Upper Tunnel-$ Rockbolts 1" @ 12'3,530 EA528$ 1,870,000$ Rockbolts 1" @ 9'600 EA432$ 260,000$ Steel Mesh210,200 SF6$ 1,340,000$ Steel Support213 TON12,801$ 2,730,000$ Upstream Lower Portal-$ Rockbolts 1" @ 15'240 EA736$ 180,000$ Anchors 1" @ 25'290 EA1,235$ 360,000$ Upstream Upper Portal -$ Rockbolts 1" @ 15'-$ Anchors 1" @ 25'130 EA736$ 100,000$ Downstream Lower Portal-$ Rockbolts 1" @ 15'200 EA736$ 150,000$ Downstream Upper Portal-$ Rockbolts 1" @ 15'100 EA736$ 70,000$ Retaining Wall Anchors 1" @25'100 EA1,235$ 120,000$ Emergency Release Chambers-$ Rockbolts 1" @ 25'100 EA1,235$ 120,000$ Rockbolts 1" @ 15'125 EA736$ 90,000$ Steel Mesh3,600 SF6$ 20,000$ Steel Support14TON12,801$ 180,000$ Metal to Roof Anchors 3/4" @ 6'20 EA342$ 10,000$ Access Tunnel to Gate Chamber-$ Rockbolts 1" @ 12'775 EA528$ 410,000$ Rockbolts 1" @ 9'240 EA432$ 100,000$ Steel Mesh39,900 SF6$ 250,000$ Steel Support55 TON12,801$ 700,000$ 0.218Structural- Misc Steelwork2,775 SF94$ 260,000$ 0.21cMechanical-$ Upstream Lower Gates-$ Gate Equipment2 EA5,073,120$ 10,150,000$ Upstream Upper Gates-$ Gate Equipment2 EA2,840,080$ 5,680,000$ Trashracks1 LS1,777,500$ 1,780,000$ Downstream Lower Outlet -$ Stoplog Guides 1 LS142,200$ 140,000$ Stoplogs includes follower1 LS1,967,100$ 1,970,000$ Downstream Upper Outlet -$ Stoplog Guides 1 LS82,950$ 80,000$ Low Level Release-$ Slide Gates Include Steel Liner9 EA3,517,470$ 31,660,000$ -$ 0.22Upstream Cofferdam -$ 0.221Excavation-$ Page 19 of 61
Page 20 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionOverburden Removal1,000 CY12$ 10,000$ 0.222Fill-$ Rock Fill38,400 CY11$ 420,000$ Fine Filter16,600 CY37$ 610,000$ Coarse Filter15,900 CY30$ 480,000$ Rock Shell196,500 CY11$ 2,060,000$ Closure Dike58,500 CY11$ 640,000$ Rip Rap21,200 CY24$ 510,000$ 0.223Cutoff Slurry Wall-$ excavation4,850 CY5$ 20,000$ slurry wall43,600 SF72$ 3,160,000$ 0.22dDewatering -$ Initial Dewatering 1 LS5,807,685$ 5,810,000$ Dewatering Maintenance1 LS22,377,990$ 22,380,000$ 0.23Down Stream Cofferdam-$ 0.231Excavation-$ overburden5,000 CY12$ 60,000$ Rock 500 CY10$ -$ Removal of Cofferdam14,500 CY13$ 200,000$ 0.232 Fill-$ Rip Rap1,800 CY24$ 40,000$ Closure Dike15,200 CY11$ 170,000$ 0.233 Cutoff Slurry Wall-$ Excavation 1,830 CY5$ 10,000$ Slurry Wall16,500 SF72$ 1,200,000$ 0.3Main Dam-$ 0.31Main Dam-$ 0.311Excavation-$ Overburden above el. 14702,026,000 CY12$ 23,360,000$ Overburden below el. 14705,320,000 CY11$ 58,840,000$ Rock Usable above el. 14701,289,000 CY43$ 55,470,000$ Rock Usable below el. 1470478,000 CY44$ 20,900,000$ Rock Waste above el. 14701,950,000 CY43$ 83,910,000$ Rock Waste below el. 1470869,500CY50$ 43,630,000$ 0.312Fill- From 1985 FERC Application-$ Rip Rap (upstream)733,802 CY23$ 17,100,000$ Gravel (upstream)11,950,489 CY21$ 245,700,000$ Coarse Filter (upstream)925,759 CY29$ 26,720,000$ Fine Filter (upstream)1,045,588 CY38$ 39,640,000$ Core (impervious)6,300,000 CY25$ 159,830,000$ Fine Filter (downstream)1,171,412 CY38$ 44,410,000$ Coarse Filter (downstream)1,074,241 CY29$ 31,000,000$ Shell- Rock and Gravel5,379,949 CY19$ 103,190,000$ Shell- Rock From Other Sources2,569,967 CY10$ 25,930,000$ Cobbles (downstream Face)950,100 CY16$ 15,530,000$ Road Base12,000 CY34$ 410,000$ Frost Protection-$ Process Protection 960,000 CY10$ 9,900,000$ Place Protection960,000 CY3$ 3,160,000$ Remove 1' Protect and Waste93,000 CY7$ 670,000$ Scarify Core Surface 193 ACRE859$ 170,000$ Filter Fabric-$ Filter Fabric592,000 SF1$ 520,000$ 0.313Surface Prep/ Grouting-$ Surface Preparation-$ Under Core/Filters above el. 15001,340,000 SF3$ 4,170,000$ Under Core/Filters below el. 1500490,000 SF3$ 1,520,000$ Under Shell above el. 15004,149,000 SF2$ 8,920,000$ Page 20 of 61
Page 21 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionUnder Shell below el. 15002,067,000 SF2$ 4,440,000$ Consolidation Grout-$ Drill Holes 550,000 LF12$ 6,550,000$ Cement550,000 CF68$ 37,300,000$ Grout Curtain-$ Drill Holes 372,000 LF27$ 9,950,000$ Cement149,000 CF81$ 12,080,000$ Dental Concrete-$ Dental Concrete68,000 CY365$ 24,840,000$ 0.317Drainage-$ Holes109,000 LF51$ 5,590,000$ 0.32Grout Galleries/Portals -$ 0.321Excavation-$ Tunnels/ Shafts- Core Area-$ Rock Horizontal8,100 CY395$ 3,200,000$ Rock Inclined9,000 CY553$ 4,980,000$ Rock Vertical1,600 CY536$ 860,000$ Tunnels/ Shafts- Access -$ Rock Horizontal10,400 CY395$ 4,110,000$ Rock Inclined1,600 CY553$ 880,000$ Portals -$ Overburden Rock2,900 CY17$ 50,000$ Rock800 CY49$ 40,000$ 0.323Surface Preparation-$ Portals -$ Horizontal 24 SF2$ -$ Inclined160 SF3$ -$ -$ 0.324Concrete and Shotcrete-$ Tunnels- Core Area-$ Concrete Plugs800 CY428$ 340,000$ Concrete Slab1,800 CY945$ 1,700,000$ Concrete Overbreak 6"920 CY756$ 700,000$ Reinforcing Steel64 TON2,888$ 180,000$ 2" Shotcrete12,000 SF5$ 60,000$ Tunnels-Access-$ Concrete Slab1,280CY945$ 1,210,000$ Concrete Overbreak 6"640 CY756$ 480,000$ Reinforcing Steel48 TON2,888$ 140,000$ 2" Shotcrete4,300 SF5$ 20,000$ Shafts-$ 2" Shotcrete4,000 SF5$ 20,000$ Portals -$ Concrete16 CY406$ 10,000$ Reinforcing Steel2 TON2,888$ -$ 0.325Support and Anchors-$ Tunnels- Core Area-$ Rockbolts 3/4" @6'1,400 EA327$ 460,000$ Steel Mesh2,400 SF5$ 10,000$ Steel Support16 TON12,801$ 200,000$ Tunnels- Access-$ Rockbolts 3/4" @6'960 EA327$ 310,000$ Steel Mesh880 SF5$ -$ Steel Support16 TON12,801$ 200,000$ Shafts -$ Rockbolts 3/4" @6'280 EA327$ 90,000$ Steel Mesh800 SF5$ -$ Portals -$ Page 21 of 61
Page 22 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)DescriptionRockbolts 1" @15'24 EA736$ 20,000$ 0.329Architectural Portal Doors-$ Portal Doors1 LS33,900$ 30,000$ 0.33Instrumentation -$ 0.331Instrumentation1 LS17,315,220$ 17,320,000$ 0.4Relict Channel-$ 0.41Shore Protection -$ 0.411Excavation -$ Overburden Stripping 2' thick2,200 CY12$ 30,000$ 0.412Fill -$ Dump and Spread-$ Filter Material - 2' layer2,200 CY32$ 70,000$ Rock Spalls/ Rip Rap- 3' Ave3,300 CY10$ 30,000$ Shore Protection -$ Rip Rap24,000 CY24$ 580,000$ Waste Rock24,000 CY23$ 550,000$ 0.44Channel Filter Blanket-$ 0.442Fill-$ Coarse Filter 2,900,000 CY34$ 98,170,000$ Fine Filter 2,180,000 CY44$ 95,160,000$ Rip Rap182,000 CY24$ 4,420,000$ 0.443Surface preparation-$ Foundation Prep -$ Clearing and Grubbing 460 ACRE3,963$ 1,820,000$ Excavation2,236,000 CY16$ 34,930,000$ 1,718,000,000$ 0.5Outlet Facilities0.51Outlet Facilities- (Intake Civil Work Include in Power Intake )1 LS73,000,000$ 73,000,000$ 0.52Main (Chute ) Spillway (Includes Civil Works for Outlet Facilities)1 LS182,000,000$ 182,000,000$ 0.53Emergency Spillway1 LS164,000,000$ 164,000,000$ 0.6Power Intake (Inc Inlet exec and Inlet Structure Civil Works for Outlet)1 LS145,000,000$ 145,000,000$ 0.7Surge Chamber1 LS24,000,000$ 24,000,000$ 0.81Head Race (Based on Penstock costs1 LS42,000,000$ 42,000,000$ 0.82Penstocks1 LS25,000,000$ 25,000,000$ 0.9Tailrace Works (1 Portal with Combined Tailrace/Diversion Tunnel)1LS22,000,000$ 22,000,000$ 677,000,000$ 333Waterwheels, Turbines and Generators0.11Turbines and Governors0.111Supply4EA0.112Install0.2Generators and Exciters 0.21Generators and Exciters (Supply and Install)0.211Generators and Exciters4 EA0.3Total Bid From Vendor (includes all equipment in this category)4 EA74,200,000$ 297,000,000$ 297,000,000$ Average from acquired quotes334Accessory Electrical Equipment0.1Connections, Supports and Structures 0.11Structures0.111Structures (included Below)0.12Conductors and Insulators0.121Generator Isolated Phase Bus1 LS3,792,000$ 3,790,000$ 0.122HV Power Cables and Accessories1 LS1,540,500$ 1,540,000$ 0.123LV Power Cables and Accessories1 LS711,000$ 710,000$ 0.124Control Cables and Accessories1 LS1,303,500$ 1,300,000$ 0.125Grounding System1 LS177,750$ 180,000$ 0.13Conduits and Fittings-$ -$ 0.131Conduits and Fittings1 LS474,000$ 470,000$ Page 22 of 61
Page 23 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)Description0.2Switchgear and Control Equipment-$ -$ 0.21 Auxiliary Transformers-$ -$ 0.211 Auxiliary Transformers 4 EA 83,811$ 340,000$ 0.22 Circuit Breakers Generators-$ 0.221 Circuit Breakers Generators 4 EA 1,504,300$ 6,020,000$ 0.23 Surge Protectors and Generator Cubicles-$ -$ 0.231 Surge Protectors and Generator Cubicles 4 EA 50,000$ 200,000$ 0.24 Switch boards-$ -$ 0.241 Switch boards1 LS 924,300$ 920,000$ 0.25 Auxiliary Power Equipment-$ -$ 0.251 Auxiliary Power Equipment 4 EA 100,000$ 400,000$ 0.3 Cubicles and Appurtenances-$ 0.31 Control, relay and meter boards-$ -$ 0.311 Control, relay and meter boards 4 EA 200,000$ 800,000$ 0.32 Computer Control System-$ -$ 0.321 Computer Control System-$ -$ 0.33 Supervisor and Telemeter System-$ -$ 0.331 Supervisor and Telemeter System-$ -$ -$ -$ 0.4 Power Transformers -$ -$ 0.41 Power Transformers -$ -$ 0.411 Power Transformers 7 EA 2,571,429$ 18,000,000$ -$ -$ 0.5 Lighting System-$ -$ 0.51 Powerhouse and Transformer Gallery-$ -$ 0.511 Powerhouse and Transformer Gallery 1 LS 1,824,900$ 1,820,000$ 0.52 Access Tunnels and Roads-$ 0.521 Access Tunnels and Roads 1 LS 402,900$ 400,000$ -$ 0.6Misc. Electrical Equipment-$ 0.61Misc. Electrical Equipment-$ 0.611Misc. Electrical Equipment1LS782,100$ 780,000$ -$ 0.7Surface Accessory Equipment-$ 0.7134.5 kV and LV Equipment-$ 0.711Switchboard1 LS213,300$ 210,000$ 0.712Cables1 LS450,300$ 450,000$ 0.713Aux Transformers 1 LS284,400$ 280,000$ 0.73Diesel Generator- Standby -$ 0.731Diesel Generator- Standby 2 EA347,550$ 700,000$ 0.74Exterior Lighting -$ 0.741Exterior Lighting 1 LS355,500$ 360,000$ 0.75Mimic Board- Control Building-$ 0.751Mimic Board- Control Building1 LS1,185,000$ 1,190,000$ -$ 41,000,000$ 335Misc Powerplant Equipment-$ 0.1 Auxiliary Systems- Underground-$ 0.11 Station Water Systems-$ 0.111 Station Water Systems 1 LS 4,977,000$ 4,980,000$ 0.12 Fire Protection Systems-$ -$ 0.121 Fire Protection Systems 1 LS 2,844,000$ 2,840,000$ 0.13 Compressed Air Systems -$ -$ 0.131 Compressed Air Systems 1 LS 3,555,000$ 3,560,000$ 0.14 Oil Handling Systems-$ -$ 0.141 Oil Handling Systems 1 LS 2,370,000$ 2,370,000$ 0.15 Drainage & Dewatering -$ -$ 0.151 Drainage & Dewatering 3 EA 1,738,000$ 5,210,000$ 0.16 Heating, Ventilation and Cooling System-$ -$ Page 23 of 61
Page 24 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)Description0.161Heating, Ventilation and Cooling System1 LS3,555,000$ 3,560,000$ 0.17Miscellaneous-$ 0.171Miscellaneous1 LS2,370,000$ 2,370,000$ 0.2Auxiliary Systems- Surface Facilities-$ 0.21Auxiliary Systems- Surface Facilities-$ 0.211Auxiliary Systems- Surface Facilities1 LS711,000$ 710,000$ 0.3Auxiliary Equipment-$ 0.31Powerhouse Cranes -$ -$ 0.311Powerhouse Cranes 2 EA1,800,000$ 3,600,000$ 0.32Elevators -$ -$ 0.321Elevators 3 EA181,700$ 550,000$ 0.33Miscellaneous Cranes and Hoists-$ -$ 0.331Miscellaneous Cranes and Hoists1 LS505,500$ 510,000$ 0.34Machine Shop Equipment-$ -$ 0.341Machine Shop Equipment1 LS2,022,000$ 2,020,000$ 0.4General Station Equipment -$ -$ 0.5Communications Equipment1 LS106,650$ 110,000$ -$ -$ 32,000,000$ 336Roads, Rails and Air Facilities -$ 0.1 Roads 0.11 Permanent RoadsCost of road upgrades for 23 mi of Denali Highway 23 Mi 1,000,000.00$ 23,000,000.00$ Cost of New road to 42 Mi of road to Watana 42 Mi 3,000,000.00$ 126,000,000.00$ 0.131 Site RoadsConstruction RoadsSite Roads20 Mile 750,000.00$ 15,000,000$ Maintenance141 MI/YRS 223,092.85$ 31,500,000$ 0.132 Permanent RoadsPermanent Roads 6 Mile 1,287,997.42$ 7,700,000$ 0.2 Rail 0.1 Railhead at Cantwell 1 LS 14,000,000.00$ 14,000,000$ 0.3 Airstrip0.31 AirstripPermanent Airstrip 1 LS 13,000,000.00$ 13,000,000$ Temporary Airstrip 1 LS 2,000,000.00$ 2,000,000$ 232,000,000$ 350‐359Transmission Plant33 MILE5,700,000.00$ 188,100,000.00$ 2EA18,000,000.00$ 36,000,000.00$ 224,000,000$ General Plant389Land and Land RightsLand and Land Rights(incl in 330)390Structures and ImprovementsStructures and Improvements(incl in 331.2)391Office Furniture and EquipmentOffice Furniture and Equipment(incl in 399)392Transportation EquipmentTransportation EquipmentPage 24 of 61
Page 25 of 61FERC Line # Sub CategoriesQuantity Units 2008 Unit Price Line PriceTotalLow Watana (Expandable) (4 Turbines)Description(incl in 399)393Stores EquipmentStores Equipment(incl in 399)394Tools Shop and Garage EquipmentTools Shop and Garage Equipment(incl in 399)395Laboratory EquipmentLaboratory Equipment(incl in 399)396Power-Operated EquipmentPower-Operated Equipment(incl in 399)397Communications EquipmentCommunications Equipment(incl in 399)398Miscellaneous EquipmentMiscellaneous Equipment(incl in 399)399Other Tangible PropertyOther Tangible Property1 LS 16,000,000$ 16,000,000$ Saved Maintenance1 LS (231,220)$ (230,000)$ -$ 16,000,000$ Indirect Costs61Temporary Construction FacilitiesTemporary Construction Facilities(incl in direct costs)62Construction Equipment Construction Equipment(incl in direct costs)63Main Construction Camp 0.1Main Construction Camp1 LS180,000,000$ 180,000,000$ 180,000,000$ 64Labor ExpenseLabor Expense65SuperintendenceSuperintendence66InsuranceInsurance68Mitigation Fishery, Terrestrial and Recrational)- Not Included1 LS200,000,000$ -$ 69FeesFeesSubtotalContingency (20%)1 LS821,000,000$ 821,000,000$ Subtotal71Engineering (4%), Enviornmental (2%), Regulatory(1%)1 LS259,000,000$ 259,000,000$ 71aConstruction Management (4%)1 LS148,000,000$ 148,000,000$ 72Legal Expenses75Taxes76Administrative & Gen. Expenses77Interest80Earnings/Expenses During ConstructionTotal Project Cost4,925,000,000$ Max Plant Capacity 600Page 25 of 61
Page 26 of 61Md Badruzzaman revisions 6/11/09Md Badruzzaman revisions 6/11/09Color Denotes Cells copied from Low Watana Non ExpandabDenotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / Remarks330Land and Land Rights0.1Land1 LS120,870,000.00$ 120,870,000$ 0.2Land RightsIncluded Above0.3Misc Charges in Credit AboveIncluded Above120,900,000$ 331Powerplant Structure Improvements0.1Powerhouse0.11Powerhouse and Draft Tube0.111ExcavationPowerhouse Rock914,400 CY43.72$ 39,978,000$ Performed End Area Calcs for total area, Assume 60% Rock, 40% Overburden. Used Unit price from Item 332.311 - Main Dam Exc ($43.7Powerhouse Overburden609,600 CY11.53$ 7,029,000$ Performed End Area Calcs for total area, Assume 40% Rock, 60% Overburden. Used Unit price from Item 332.311 - Main Dam Exc ($11.5Draft Tube Rock0CY90.12$ -$ Included in Powerhouse ExcTotal Total Estimat0.113Surface Preparation/ GroutingCopied from Low Watana Non ExpandablPowerhouse108,000 SF3.33$ 360,000$ Calculated QtyDraft Tube0 SF3.33$ -$ Included in Powerhouse GrouGrout Curtain- Drill holes47,700 LF27.63$ 1,318,000$ Multiplied by Surface area by ratio of original grout length to surface prep (29,200/66,00Grout Curtain- Cement19,000 CF81.10$ 1,541,000$ Multiplied by Surface area by ratio of original cement qty to surface prep (11,667/66,000.114Concrete and Shot CretePowerhouse Concrete 62,356 CY544.85$ 33,970,000$ Total Concrete Qty to Resist Uplift 56,687 cyd. Multiplied by Factor of Safety of 1.1 (Includes Transformer Deck ArePowerhouse Concrete Overbreak0CY447.21$ -$ Included in Item 332.111Powerhouse Reinforcing Stee3,118 TON2,858.29$ 8,910,000$ Original Ratio of steel to concrete was 0.05 ton/cyd. Multiplied Concrete Volume by 0.Powerhouse 4" Shotcrete0 SF10.14$ -$ Not needed for surface powerhouseDraft Tube Concrete0CY692.87$ -$ Include w/ Powerhouse ConcreteDraft Tube Concrete Overbreak0CY447.21$ -$ Not needed for surface powerhouseDraft Tube Reinforcing Stee0 TON2,858.29$ -$ Include w/ Powerhouse ConcreteDraft Tube 2" Shotcrete0 SF5.45$ -$ Not needed for surface powerhouse0.115Support and AnchorsPowerhouse Rockbolts 1" @ 25' Hy148 EA1,234.86$ 180,000$ Multiplied Underground Qty by reduction in surface area on rock, 0.229Powerhouse Rockbolts 1" @ 15'301 EA735.81$ 220,000$ Multiplied Underground Qty by reduction in surface area on rock, 0.229Powerhouse Steel Mesh6,821 SF5.81$ 40,000$ Multiplied Underground Qty by reduction in surface area on rock, 0.229Powerhouse Steel Suppor21 TON12,671.94$ 270,000$ Multiplied Underground Qty by reduction in surface area on rock, 0.229Draft Tube Rockbolts 1" @ 25' Hy0 EA1,234.86$ -$ Assume no rockbolts for draft tube on surface powerhousDraft Tube Rockbolts 1" @ 120 EA528.34$ -$ Assume no rockbolts for draft tube on surface powerhousDraft Tube Rockbolts 1" @ 90 EA432.12$ -$ Assume no rockbolts for draft tube on surface powerhousDraft Tube Steel Mesh0 SF6.55$ -$ Assume no rockbolts for draft tube on surface powerhous0.117Holes (U/S of Powerhouse)0 LF51.32$ -$ Not needed for surface powerhouseHoles (Powerhouse Crown0 LF51.32$ -$ Not needed for surface powerhouse0.118Structural- Misc Steelwork-$ Copied from Low Watana Non ExpandablPowerhouse and Draft Tube- Steel Crane Rail 1 LS 10,276,309.00$ 10,280,000$ Copied from Low Watana Non Expandabl0.119Architectural- Powerhouse1 LS5,500,000.00$ 5,500,000$ Increased ratio of Architectural Cost vs Total Powerplant Cost to approx 4.5% to reflect recent surface powerhouse experience. Formerly was at 2y0.11cMechanical Draft Tube Gates4 SETS427,880.00$ 1,712,000$ Copied from Low Watana Non ExpandablDraft Tube Gate Guides4 SETS202,680.00$ 811,000$ Copied from Low Watana Non ExpandablDraft Tube Crane1 LS1,140,000.00$ 1,140,000$ Copied from Low Watana Non Expandabl0.12Access Tunnels and Portals 0.121 ExcavationMain Tunnel0 CY97.45$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioTransformer Gallery Tunne0CY97.45$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioGrouting Gallery Tunne0 CY396.04$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSurge Chamber Access Tunne0 CY145.22$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPenstock Access Tunnel0CY145.22$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPenstock Elbow Access Tunne0 CY145.22$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioAccess Shaft Tunnel0CY145.22$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConnector Tunnel0CY379.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPortals Overburden0CY17.14$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPortals Rock0CY49.31$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.123Surface Preparation Main Tunnel Slab0 SF2.21$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPenstock Access Slab0 SF2.21$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioHorizontal Portal 0 SF2.30$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioInclined Porta0 SF3.33$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.124Concrete and Shot CreteMain PortalConcrete Slab0CY406.27$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConcrete Walls0CY406.27$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConcrete Overbreak0CY368.48$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioReinforcing Stee0 TON2,887.51$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioTunnelsConcrete Slab Main Tunne 0 CY503.90$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConcrete Plugs Penstock Elbow ACC0CY755.86$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConcrete Overbreak Main Tunnel 60 CY346.43$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioReinforcing Stee0 TON2,887.51$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Main Tunne0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Transformer Ga0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Surge Chamber Acc0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Penstock Access 0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Penstock Elbow Acc0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Access Shaft0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Grout Gallery0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio2 " Shotcrete Connector Tunne0 SF5.26$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.125Support and AnchorsMain TunnelRockbolts 1" @12'0 EA528.34$ -$ No Tunnels for Surface Powerhouse OptionRockbolts 1" @ 9'0 EA432.12$ -$ No Tunnels for Surface Powerhouse OptionFull Watana RCC Estmate from 11/17/09 used as basisModified by Hatch Associates Consultants, Inc._RST_10/28/10DescriptionAlternatives- 2008 DollarsLow Watana RCC (Non Expandable) Alternative (4 Turbines)HDR/AEA Susitna Hydroelectric ProjectCost Estimates for 1982 quantities- AlternativesBy: DTABy: Leanne Andruszkiewicz, EIT Date: 1/25/09Reviewed By: David Elwood, EIT Date: 1/25/09, Modified by Hatch Acres_mb_061109, R&M 11/16/09Page 26 of 61
Page 27 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)Steel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse OptionSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse OptionMain Tunnel Portal-$ Rockbolts 1" @15'0 EA735.79$ -$ No Tunnels for Surface Powerhouse OptionTransformer Gallery Tunnel-$ No transformer gallery, included in surface powerhousRockbolts 1" @12'0 EA528.34$ -$ No transformer gallery, included in surface powerhousRockbolts 1" @ 9'0 EA432.12$ -$ No transformer gallery, included in surface powerhousSteel Mesh0 SF5.89$ -$ No transformer gallery, included in surface powerhousSteel Support0 TON12,801.49$ -$ No transformer gallery, included in surface powerhousGrouting Gallery Tunne-$ Rockbolts 3/4" @ 6'0 EA327.15$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSurge Chamber Access Tunne-$ Rockbolts 1" @12'0 EA528.34$ -$ No Surge ChamberRockbolts 1" @ 9'0 EA432.12$ -$ No Surge ChamberSteel Mesh0 SF6.37$ -$ No Surge ChamberSteel Support0 TON12,801.49$ -$ No Surge ChamberPenstock Access TunnelRockbolts 1" @12'0 EA528.34$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioRockbolts 1" @ 9'0 EA432.12$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioPenstock Elbow Access TunneRockbolts 1" @12'0 EA528.34$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioRockbolts 1" @ 9'0 EA432.12$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioAccess Shaft TunnelRockbolts 1" @12'0 EA528.34$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavationRockbolts 1" @ 9'0 EA432.12$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavationSteel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavationSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavationConnector TunnelRockbolts 3/4" @ 6'0 EA327.15$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Mesh0 SF6.37$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioSteel Support0 TON12,801.49$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.129Architectural- Main Portal Doors0 SETS158,371.90$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.12cMechanical Ventilation SystemIncluded in (63.81 and 63.82)0.13Access Shaft0.131Excavation Rock0CY227.67$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.133Surface Preparation Shaft0 SF3.33$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.134Concrete and Shot CreteConcrete Lining0CY944.82$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse ExcavatioConcrete Overbreak 6"0CY551.14$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.135Support and Anchors - Rockbolts 3/4" @ 60 EA327.15$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.138Structural Misc Steelwork0 TON7,395.00$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.139Architectural- control Building0.13cMechanical Elevators0 LS2,368,815.00$ -$ No Tunnels for Surface Powerhouse Option. Access Through Powerhouse Excavatio0.14Fire Protection Head Tank0.141Excavation0CY43.72$ -$ Excavation included in total powerhouse ex0.143Surface Preparation0 SF2.30$ -$ Surface Prep included in total powerhouse ex0.144Concrete & ShotcreteConcrete 208 CY963.72$ 200,000$ Increased underground Qty by 25% to account for thicker outside walConcrete Overbreak 6"0CY406.27$ -$ None for Surface OptionReinforcing Stee8 TON2,858.29$ 20,000$ Increased underground Qty by 25% to account for thicker outside wal0.145Support and AnchorsRockbolts 1" @12'0 EA528.34$ -$ None for Surface OptionRockbolts 1" @ 9'0 EA432.12$ -$ None for Surface OptionSteel Mesh0 SF6.30$ -$ None for Surface OptionSteel Support0 TON12,671.95$ -$ None for Surface Option0.148Misc Steelwork1 LS73,297.50$ 70,000$ Copied from Low Watana Non Expandabl0.14cMechanical Piping/Valves 0.15 Bus Tunnels (totals for 3 Bus Tunnels)0.151ExcavationRock Horizonta0 CY213.70$ -$ No Bus TunnelRock Inclined0CY601.04$ -$ No Bus Tunnel0.153 Surface Preparation- Tunnels0 SF3.33$ -$ No Bus Tunnel0.154Concrete and ShotcreteConcrete Slab0CY818.84$ -$ No Bus TunnelConcrete Overbreak 12"0CY472.41$ -$ No Bus TunnelReinforcing Stee0 TON2,858.29$ -$ No Bus Tunnel2" Shotcrete0 SF5.26$ -$ No Bus Tunnel0.155Supports and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ No Bus TunnelRockbolts 1" @ 12'0 EA528.34$ -$ No Bus TunnelRockbolts 1" @ 9'0 EA432.12$ -$ No Bus TunnelSteel Mesh0 SF6.30$ -$ No Bus TunnelSteel Support0 TON12,671.94$ -$ No Bus Tunnel0.16Transformer Gallery Tunne0.161Excavation- Rock 0 CY87.44$ -$ No transformer gallery, included in surface powerhous0.163Surface Preparation0 SF2.30$ -$ No transformer gallery, included in surface powerhous0.164Concrete and ShotcreteConcrete Base Slab0CY544.85$ -$ Included in Powerhouse Cost, as all one building for surface optioConcrete Overbreak 12"H/6"V0CY377.93$ -$ Included in Powerhouse Cost, as all one building for surface optioReinforcing Stee0 TON2,858.29$ -$ Included in Powerhouse Cost, as all one building for surface optio0.165Support and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ None for Surface OptionRockbolts 1" @ 15'0 EA735.81$ -$ None for Surface OptionSteel Mesh0 SF5.81$ -$ None for Surface OptionSteel Support0 TON12,671.94$ -$ None for Surface Option0.167Drainage Holes 0 LF47.95$ -$ None for Surface OptionPage 27 of 61
Page 28 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)0.17Cable Shafts 0.171Excavation Rock0CY601.04$ -$ Included in Surface Powerhouse0.173Surface Preparation Shafts0 SF3.33$ -$ Copied from Low Watana Non Expandabl0.174Concrete and ShotcreteConcrete Lining0CY1,763.66$ -$ Copied from Low Watana Non ExpandablConcrete Overbreak 6"0CY881.83$ -$ Copied from Low Watana Non Expandabl0.175 Supports and Anchors- Rockbolts 3/4" @ 60 EA327.15$ -$ Copied from Low Watana Non Expandabl0.178Structural Steel Support Towers12 TON15,602.00$ 190,000$ Was formerly Structural Misc Steelwork, changed to Towers for running from transformer deck to switchyard. Kept qty and unit cost the sa0.179Architectural- Enclosures0 LS199,317.00$ -$ None for Surface Option0.17cMechanical Hoist0 EA476,960.00$ -$ None for Surface Option0.18Dewatering (during Construction0.181 Dewatering (Power Facilities1 LS1,336,798.50$ 1,340,000$ Copied from Low Watana Non Expandabl0.19Instrumentation0.191Instrumentation1 LS1,714,813.50$ 1,710,000$ Copied from Low Watana Non Expandabl0.2Misc Buildings (Control Buildings1 LS4,433,085.00$ 4,430,000$ Copied from Low Watana Non Expandabl0.3Permanent Town(included in 63.5)121,219,000$ 332Reservoir, Dams and Waterways0.1Reservoir0.11Reservoir Clearing23,000ACRE3,005.85$ 69,135,000$ Copied from Low Watana Non Expandabl0.2 Diversion Schemes /Cofferdams0.21Diversion Tunnels /Portals-$ 0.211 Excavation-$ Combined Tunnels-$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Rock186,500 CY92.33$ 17,220,000$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Combined Upstream Portals-$ Calculated QuantityRock35,000 CY49.16$ 1,720,000$ Calculated QuantityCombined Downstream Portals-$ Calculated QuantityRock Usable75,000 CY49.16$ 3,690,000$ Calculated QuantityEmergency Release Chambers-$ Multiplied Low Watana Qty by (31/49) = 0.633Excavate Concrete for Plugs1,139 CY101.98$ 120,000$ Multiplied Low Watana Qty by (31/49) = 0.634Gate Chamber 2,975 CY110.73$ 330,000$ Multiplied Low Watana Qty by (31/49) = 0.635Access Tunnel to Gate Chambe-$ No Access TunnelRock0CY97.15$ -$ No Access Tunnel0.212Fill- Temp for Coffer Dam to Construct Upstream Portal23,000 CY11.66$ 270,000$ Copied from Low Watana Non Expandabl0.213 Surface Preparation \ grouting-$ Copied from Low Watana Non ExpandablUpstream Upper Portal-$ Copied from Low Watana Non ExpandablHorizontal 3,200 SF 2.30$ 10,000$ Copied from Low Watana Non ExpandablInclined8,600 SF3.33$ 30,000$ Copied from Low Watana Non ExpandablUpstream Lower Portal-$ Copied from Low Watana Non ExpandablHorizontal 1,300 SF 2.30$ -$ Copied from Low Watana Non ExpandablInclined14,900 SF3.33$ 50,000$ Copied from Low Watana Non ExpandablDownstream Upper Porta-$ Copied from Low Watana Non ExpandablHorizontal 6,100 SF 2.30$ 10,000$ Copied from Low Watana Non ExpandablInclined20,500 SF3.33$ 70,000$ Copied from Low Watana Non ExpandablDownstream Lower Porta-$ Copied from Low Watana Non ExpandablHorizontal 600 SF 2.30$ -$ Copied from Low Watana Non ExpandablInclined5,600 SF3.33$ 20,000$ Copied from Low Watana Non ExpandablGrout Upper Tunnel Plugs -$ Copied from Low Watana Non ExpandablDrill Holes 4,100 LF 26.76$ 110,000$ Copied from Low Watana Non ExpandablCement820 CF81.10$ 70,000$ Copied from Low Watana Non ExpandablGrout Lower Tunnel Permanent Plugs-$ Copied from Low Watana Non ExpandablDrill Holes 2,050 LF 26.76$ 50,000$ Copied from Low Watana Non ExpandablCement410 CF81.10$ 30,000$ Copied from Low Watana Non Expandabl0.214Concrete and Shotcrete-$ Combined Tunnels-$ Concrete Lining34,000 CY566.89$ 19,270,000$ Multiplied Low Watana Qty by 0.426Concrete Lining Overbreak 615,000 CY314.94$ 4,720,000$ Multiplied Low Watana Qty by 0.426Reinforcing Steel 21 TON2,887.51$ 60,000$ Multiplied Low Watana Qty by 0.426Concrete Lining for Plug6,200 CY428.32$ 2,660,000$ Copied from Low Watana Non Expandabl2" Shotcrete48,500 SF5.26$ 260,000$ Multiplied Low Watana Qty by 0.426Upstream Upper Porta-$ Copied from Low Watana Non ExpandablConcrete Headwall 3,200 CY651.93$ 2,090,000$ Copied from Low Watana Non ExpandablConcrete Lining 1,300 CY651.93$ 850,000$ Copied from Low Watana Non ExpandablConcrete Slab 750 CY651.93$ 490,000$ Copied from Low Watana Non ExpandablConcrete Piers800 CY651.93$ 520,000$ Copied from Low Watana Non ExpandablConcrete Overbreak 12" H/6"V300 CY472.41$ 140,000$ Copied from Low Watana Non ExpandablReinforcing Steel 400 TON2,887.51$ 1,160,000$ Copied from Low Watana Non ExpandablUpstream Lower Portal-$ Copied from Low Watana Non ExpandablConcrete Headwall 4,500 CY651.93$ 2,930,000$ Copied from Low Watana Non ExpandablConcrete Lining 3,000 CY651.93$ 1,960,000$ Copied from Low Watana Non ExpandablConcrete Slab 300 CY651.93$ 200,000$ Copied from Low Watana Non ExpandablConcrete Piers700 CY651.93$ 460,000$ Copied from Low Watana Non ExpandablConcrete Overbreak 12" H/6"V350 CY472.41$ 170,000$ Copied from Low Watana Non ExpandablReinforcing Steel 600 TON2,887.51$ 1,730,000$ Copied from Low Watana Non ExpandablDownstream Upper Porta-$ Copied from Low Watana Non ExpandablConcrete Headwall 500 CY651.93$ 330,000$ Copied from Low Watana Non ExpandablConcrete Slab 100 CY651.93$ 70,000$ Copied from Low Watana Non ExpandablConcrete Overbreak 12" H/6"V100 CY472.41$ 50,000$ Copied from Low Watana Non ExpandablReinforcing Steel 40 TON2,887.51$ 120,000$ Copied from Low Watana Non ExpandablDownstream Lower Porta-$ Copied from Low Watana Non ExpandablConcrete Headwall 2,500 CY651.93$ 1,630,000$ Copied from Low Watana Non ExpandablConcrete Slab 100 CY651.93$ 70,000$ Copied from Low Watana Non ExpandablConcrete Overbreak 12" H/6"V150 CY472.41$ 70,000$ Copied from Low Watana Non ExpandablReinforcing Steel 170 TON2,887.51$ 490,000$ Copied from Low Watana Non ExpandablDownstream Flip Bucke-$ No Flip BucketConcrete Slab 0 CY651.93$ -$ No Flip BucketConcrete Walls0CY651.93$ -$ No Flip BucketConcrete Invert0CY651.93$ -$ No Flip BucketConcrete Overbreak 12" H/6"V0CY42.41$ -$ No Flip BucketReinforcing Steel 0 TON2,887.51$ -$ No Flip BucketDownstream Retaining Wal-$ Copied from Low Watana Non ExpandablConcrete Slab 200 CY651.93$ 130,000$ Copied from Low Watana Non ExpandablPage 28 of 61
Page 29 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)Concrete Walls2,000 CY651.93$ 1,300,000$ Copied from Low Watana Non ExpandablConcrete Overbreak 12" H/6"V110 CY472.41$ 50,000$ Copied from Low Watana Non ExpandablReinforcing Steel 90 TON2,887.51$ 260,000$ Copied from Low Watana Non ExpandablEmergency Release Chambers-$ Copied from Low Watana Non ExpandablConcrete Plug5,500 CY755.86$ 4,160,000$ Multiplied Low Watana Qty by (13.5^2/22.5^2) = 0.364" Shotcrete 1,000 SF10.13$ 10,000$ Multiplied Low Watana Qty by (13.5^2/22.5^2) = 0.36Access Tunnel to Gate Chambe-$ No Access Tunnel2" Shotcrete 0 SF5.26$ -$ No Access Tunnel0.215Supports and Anchors-$ Copied from Low Watana Non ExpandablCombined Tunnels-$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Rockbolts 1" @ 12'3,100 EA528.34$ 1,640,000$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Rockbolts 1" @ 9'530 EA432.12$ 230,000$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Steel Mesh186,000 SF6.37$ 1,180,000$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Steel Support190 TON12,801.49$ 2,430,000$ Multiplied Low Watana Qty by (4100/7320)*(31/40) = 0.434Upstream Lower Porta-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 15'240 EA735.81$ 180,000$ Copied from Low Watana Non ExpandablAnchors 1" @ 25'290 EA1,234.86$ 360,000$ Copied from Low Watana Non ExpandablUpstream Upper Portal-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 15'-$ Copied from Low Watana Non ExpandablAnchors 1" @ 25'130 EA735.81$ 100,000$ Copied from Low Watana Non ExpandablDownstream Lower Porta-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 15'200 EA735.81$ 150,000$ Copied from Low Watana Non ExpandablDownstream Upper Porta-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 15'100 EA735.81$ 70,000$ Copied from Low Watana Non ExpandablRetaining Wall Anchors 1" @25100 EA1,234.86$ 120,000$ Copied from Low Watana Non ExpandablEmergency Release Chambers-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 25'63 EA1,234.86$ 80,000$ Multiplied Low Watana Qty by (31/49) = 0.633Rockbolts 1" @ 15'79 EA735.77$ 60,000$ Multiplied Low Watana Qty by (31/49) = 0.634Steel Mesh2,279 SF6.37$ 10,000$ Multiplied Low Watana Qty by (31/49) = 0.635Steel Support9 TON12,801.49$ 110,000$ Multiplied Low Watana Qty by (31/49) = 0.636Metal to Roof Anchors 3/4" @ 613 EA342.42$ -$ Multiplied Low Watana Qty by (31/49) = 0.637Access Tunnel to Gate Chambe-$ Copied from Low Watana Non ExpandablRockbolts 1" @ 12'0 EA528.34$ -$ No Access TunnelRockbolts 1" @ 9'0 EA432.12$ -$ No Access TunnelSteel Mesh0 SF6.37$ -$ No Access TunnelSteel Support0 TON12,801.49$ -$ No Access Tunnel0.218Structural- Misc Steelwork2,775 SF93.61$ 260,000$ Copied from Low Watana Non Expandabl0.21cMechanical-$ Copied from Low Watana Non ExpandablUpstream Lower Gates-$ Copied from Low Watana Non ExpandablGate Equipment2 EA5,073,120.00$ 10,150,000$ Copied from Low Watana Non ExpandablUpstream Upper Gates-$ Copied from Low Watana Non ExpandablGate Equipment2 EA2,840,080.00$ 5,680,000$ Copied from Low Watana Non ExpandablTrashracks1 LS1,777,500.00$ 1,780,000$ Copied from Low Watana Non ExpandablDownstream Lower Outlet-$ Copied from Low Watana Non ExpandablStoplog Guides 1 LS142,200.00$ 140,000$ Copied from Low Watana Non ExpandablStoplogs includes followe1 LS1,967,100.00$ 1,970,000$ Copied from Low Watana Non ExpandablDownstream Upper Outlet-$ Copied from Low Watana Non ExpandablStoplog Guides 1 LS82,950.00$ 80,000$ Copied from Low Watana Non ExpandablLow Level Release-$ Copied from Low Watana Non ExpandablSlide Gates Include Steel Line9 EA3,517,470.00$ 31,660,000$ Copied from Low Watana Non Expandabl0.22Upstream Cofferdam 0.221CofferdamRCC978,000 CY100.00$ (incorporated in the main dam0.222Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 23333 CY, calculated0.223 Cutoff Slurry Wal excavation5,100 CY4.88$ 25,000$ 4,850 CY from embankment dam slurry wal46,000 SF72.44$ 3,332,000$ 43,6000 SF from embankment dam0.22dDewatering (same as embankment damInitial Dewatering1 LS5,807,685.00$ 5,808,000$ Dewatering Maintenance1 LS22,377,990.00$ 22,378,000$ 0.23Down Stream Cofferdam0.231 Cofferdam RCC261,300 CY100.00$ (incorporated in the main dam0.232Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 0.233 Cutoff Slurry Wal Excavation5,100 CY4.60$ 23,000$ Slurry Wal46,000 SF72.44$ 3,332,000$ 0.3Main Dam0.31Main Dam0.311ExcavationOverburden above el. 1470367,381 CY11.53$ 4,236,000$ Overburden below el. 1470964,693 CY11.06$ 10,670,000$ Rock Usable above el. 1470233,739 CY43.03$ 10,058,000$ Rock Usable below el. 147086,677 CY43.72$ 3,790,000$ Rock Waste above el. 1470353,600 CY43.03$ 15,215,000$ Rock Waste below el. 1470157,669 CY50.18$ 7,912,000$ 0.312 DamRCC 7,600,000 CY100.00$ 760,000,000$ End Area CalculationsBase RCC0 CY100.00$ -$ Put all Volume in value above0.313Surface Prep/ GroutingSurface PreparationUnder Core/Filters above el. 1500911,200 SF3.11$ 2,834,000$ Multiplied Full RCC Qty by ratio of Base Length and Crest Width (915/1100)*(2380/3640) = 0.54Under Core/Filters below el. 1500613,000 SF3.11$ 1,906,000$ Left the same as Embankment and Full RCC Under Shell above el. 15002,821,184 SF2.15$ 6,066,000$ Multiplied Full RCC Qty by ratio of Base Length and Crest Width (915/1100)*(2380/3640) = 0.54Under Shell below el. 15001,405,696 SF2.15$ 3,022,000$ Multiplied Full RCC Qty by ratio of Base Length and Crest Width (915/1100)*(2380/3640) = 0.54Consolidation GroutDrill Holes 190,400 LF11.91$ 2,268,000$ 687,000 LF from embankment dam. Multiply Full RCC Qty by ratio of footprint area = 0.54Cement190,400 CF67.81$ 12,911,000$ 687,000 CF from embankment dam. Multiply Full RCC Qty by ratio of footprint area = 0.54Grout CurtainPrevious Study Calcs indicate the ratio of foot print area of RCC dam / Embankment dam = 0.321. Multiplied Full RCC Qty by ratio of Base Length and Crest Width (915/1100)*(2380/3640) = 0.544Page 29 of 61
Page 30 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)Drill Holes 252,960 LF26.76$ 6,769,000$ 465,000 LF from embankment dam. Multiply Full RCC Qty by ratio of footprint area = 0.54Cement101,184 CF81.10$ 8,206,000$ 186,000 CF from embankment dam. Multiply Full RCC Qty by ratio of footprint area = 0.54Dental Concrete(same as embankment damDental Concrete85,000 CY365.33$ 31,053,000$ 0.317 DrainageHoles73,984 LF51.32$ 3,797,000$ Multiply Full RCC Qty by ratio fo crest lengths (2380/3640) = 0.6540.318BridgePrecast Bridge Beams25,500 CY544.85$ 13,894,000$ Unit price from item 0.614Concrete Road Deck5,400 CY544.85$ 2,942,000$ Unit price from item 0.614Piers500 CY544.85$ 272,000$ Unit price from item 0.6140.32Grout Galleries/Portals (3 portals , multiply by 30.321 Excavation-$ Tunnels/ Shafts- Core Area-$ Rock Horizonta 0 CY394.80$ -$ No Excavation in Core Area of RCC Option. Tunnels will be formed integral to the daRock Inclined0CY552.93$ -$ No Excavation in Core Area of RCC Option. Tunnels will be formed integral to the daRock Vertical0CY536.19$ -$ No Excavation in Core Area of RCC Option. Tunnels will be formed integral to the daTunnels/ Shafts- Access -$ Rock Horizonta 1,300 CY394.80$ 510,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Rock Inclined200 CY552.93$ 110,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Portals -$ Overburden Rock2,900 CY17.16$ 50,000$ Keep the same as embankment. Conservative since portals are at dam face and excavation would be included w/ main dam eRock800 CY49.16$ 40,000$ Keep the same as embankment. Conservative since portals are at dam face and excavation would be included w/ main dam e0.323Surface Preparation-$ Portals -$ Horizontal 24 SF 2.30$ -$ Keep the same as embankment. Conservative since portals are at dam face and excavation would be included w/ main dam eInclined160 SF3.33$ -$ Keep the same as embankment. Conservative since portals are at dam face and excavation would be included w/ main dam e-$ 0.324 Concrete and Shotcrete-$ Tunnels- Core Area-$ Concrete Plugs267 CY428.32$ 110,000$ With RCC Dam, tunnel lining may reduce from avg of 12 in for embankment to estimated 4 in. (Probably conservatiConcrete Slab600 CY944.82$ 570,000$ With RCC Dam, tunnel lining may reduce from avg of 12 in for embankment to estimated 4 in. (Probably conservatiConcrete Overbreak 6"0CY755.86$ -$ Tunnels formed intergral to dam, so no overbreaReinforcing Stee21 TON2,887.51$ 60,000$ With RCC Dam, tunnel lining may reduce from avg of 12 in for embankment to estimated 4 in. (Probably conservati2" Shotcrete0 SF5.26$ -$ Tunnels formed intergral to dam, so no overbreaTunnels-Access-$ Concrete Slab160 CY944.82$ 150,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Concrete Overbreak 6"80 CY755.86$ 60,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Reinforcing Stee6 TON2,887.51$ 20,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately 12" Shotcrete538 SF5.26$ -$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately 1Shafts-$ 2" Shotcrete4,000 SF5.26$ 20,000$ Portals -$ Concrete16 CY406.36$ 10,000$ Reinforcing Stee2 TON2,887.51$ -$ 0.325Support and Anchors-$ Tunnels- Core Area-$ Rockbolts 3/4" @6'0 EA327.15$ -$ Not required in core area for the RCC optioSteel Mesh0 SF5.37$ -$ Not required in core area for the RCC optioSteel Support0 TON12,801.49$ -$ Not required in core area for the RCC optioTunnels- Access-$ Rockbolts 3/4" @6'120 EA327.15$ 40,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Steel Mesh110 SF5.37$ -$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately Steel Support2 TON12,801.49$ 30,000$ Galleries are accessed via surface roads in RCC option. Length of access tunnels reduced by approximately 1Shafts -$ Rockbolts 3/4" @6'280 EA327.15$ 90,000$ Steel Mesh800 SF5.37$ -$ Portals -$ Rockbolts 1" @15'24 EA735.81$ 20,000$ 0.329Architectural Portal Doors-$ Portal Doors1 LS33,900.00$ 30,000$ 0.33Instrumentation -$ 0.331Instrumentation1 LS8,657,610.00$ 8,660,000$ Used previous assumption of 50% embankment dam. Multiplied Low Watana by 00.4Relict Channel-$ Copied from Low Watana Non Expandabl0.41 Shore Protection -$ Copied from Low Watana Non Expandabl0.411 Excavation -$ Copied from Low Watana Non ExpandablOverburden Stripping 2' thick2,200 CY11.56$ 30,000$ Copied from Low Watana Non Expandabl0.412 Fill -$ Copied from Low Watana Non ExpandablDump and Spread-$ Copied from Low Watana Non ExpandablFilter Material - 2' laye2,200 CY31.93$ 70,000$ Copied from Low Watana Non ExpandablRock Spalls/ Rip Rap- 3' Ave3,300 CY9.86$ 30,000$ Copied from Low Watana Non ExpandablShore Protection -$ Copied from Low Watana Non ExpandablRip Rap24,000 CY24.26$ 580,000$ Copied from Low Watana Non ExpandablWaste Rock24,000 CY22.78$ 550,000$ Copied from Low Watana Non Expandabl0.44 Channel Filter Blanket-$ Copied from Low Watana Non Expandabl0.442 Fill-$ Copied from Low Watana Non ExpandablCoarse Filter 2,900,000 CY33.85$ 98,170,000$ Copied from Low Watana Non ExpandablFine Filter 2,180,000 CY43.65$ 95,160,000$ Copied from Low Watana Non ExpandablRip Rap182,000 CY24.26$ 4,420,000$ Copied from Low Watana Non Expandabl0.443 Surface preparation-$ Copied from Low Watana Non ExpandablFoundation Prep -$ Copied from Low Watana Non ExpandablClearing and Grubbing460ACRE3,963.11$ 1,820,000$ Copied from Low Watana Non Expandabl235,760,000$ Excavation2,236,000 CY15.62$ 34,930,000$ Copied from Low Watana Non Expandabl0.5 Outlet Facilities 0.51 Outlet Facilities- (Intake Civil Work Include in Power Intake(same as embankment dam0.511ExcavationInlet (Included in 332.611)Outlet (Included in 332.521)Tunnels Rock Horizonta 0 CY103.00$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse CalcRock Inclined 0 CY183.49$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc0.513Surface Preparation/ Grouting Inlet (Included in 332.613)Outlet (Included in 332.523)Page 30 of 61
Page 31 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)Tunnels0 SF 2.30$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse CalcContact Grouting0 LS569,428.05$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc0.514Concrete and ShotcreteInlet (Included in 332.614)Outlet (Included in 332.524)Tunnels Concrete Lining 0CY944.82$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse CalcConcrete Overbreak 6"0CY440.92$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc2" Shotcrete0 SF5.26$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc3" Shotcrete0 SF7.69$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc0.515Support and AnchorsInlet (Included in 332.615)Outlet (Included in 332.525)Tunnels Rock Bolts 1" @6'0 EA327.15$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse CalcSteel Mesh0 SF6.37$ -$ No Tunnels for Outlet. Excavation Volumes incl in Powerhouse Calc0.516Mechanical - Low Level OutleRevised name from "Mechanical" to "Mechanical - Low Level Outlet" as a LLO system for the RCC option will be similar to Embankment Outlet FaciliInlet Trash Racks/Guides 1 LS 1,540,500.00$ 1,541,000$ Keep same as emebankment, as these will be used for LLO StructuGate Equipment 2 EA 3,317,040.00$ 6,634,000$ Keep same as emebankment, as these will be used for LLO StructuStoplog Guides 2 SETS213,940.00$ 428,000$ Keep same as emebankment, as these will be used for LLO StructuOutletFixed Cone Valves 6 +1 Spare1 LS4,500,630.00$ 4,501,000$ Keep same as emebankment, as these will be used for LLO StructuRing Follower Gates6 EA1,936,494.80$ 11,619,000$ Keep same as emebankment, as these will be used for LLO StructuSteel Manifold Liner1,100 TON8,952.53$ 9,848,000$ Determined new required steel liner quantity to be 1000 tons, added 10% to get 1100 toMisc Mechanical Equipment1 LS948,000.00$ 948,000$ Keep same as emebankment, as these will be used for LLO StructuMisc Electrical Systems1 LS237,000.00$ 237,000$ Keep same as emebankment, as these will be used for LLO Structu0.52Main (Chute ) Spillway (Includes Civil Works for Outlet Facilities0.522Stepped SpillwayConventional Concrete - Steps55,300 CY544.85$ 30,130,000$ 55,300 CY, calculated, unit price from item 0.61Reinforcing Steel - Steps1,340 TON2,887.51$ 3,869,000$ 1,340 TON, calculated, unit price from item 0.614Conventional Concrete - Training Walls3,600 CY544.85$ 1,961,000$ 55,300 CY, calculated, unit price from item 0.61Reinforcing Steel - Training Walls90 TON2,887.51$ 260,000$ 1,340 TON, calculated, unit price from item 0.6140.523Stilling BasinConventional concrete8,400 CY544.85$ 4,577,000$ 8,400 CY, calculated, unit price from item 0.614 *Previous Estimate may have had error by inserting 85,000 cyd, not 8,400 cReinforcing Stee185 TON2,887.51$ 534,000$ 183 TON, calculated, unit price from item 0.614Excavation Rock13,000 CY50.18$ 652,000$ (03.31.311 Rock Waste)0.524Consolidation GroutingDrill Holes 7,000 LF11.91$ 83,000$ (caln for only stilling basin areaCement7,000 CF67.81$ 475,000$ Grout Curtain0.525Support and AnchorsDrainage Tunne(Assume drainage tunnel / gallery for spillway stillinSteel Support7 TON12,801.49$ 90,000$ basin, same as for embankment dam shemeSteel Mesh1,000 SF5.87$ 6,000$ Rockbolts Drainage Gallery3/4" @ 6'576 EA330.19$ 190,000$ Rockbolts Approach1" @ 15'275 EA741.28$ 204,000$ Rockbolts Chute and Structure1" @ 15'112 EA741.28$ 83,000$ Rockbolts Valve Block/Bucket1" @ 15'46 EA741.28$ 34,000$ Slab/Wall Anchors1" @ 10'9,300 EA474.06$ 4,409,000$ 0.527DrainageDrill Holes Box Drains (To Drain Tunnel)54,000 LF47.95$ 2,589,000$ 3" Relief640 LF49.50$ 32,000$ 0.52cMechanicalGate Equipment0 EA4,249,280.00$ -$ Eliminated as the RCC alternative is an uncontrolled weir crest at the spillway, where embankment option had (3) 44 ft wide radial gaStoplog Guides 0 SETS92,196.88$ -$ Eliminated as the RCC alternative is an uncontrolled weir crest at the spillway, where embankment option had (3) 44 ft wide radial gaStoplogs Includes Followe0 SET945,840.00$ -$ Eliminated as the RCC alternative is an uncontrolled weir crest at the spillway, where embankment option had (3) 44 ft wide radial gaMisc Electrical0 LS237,000.00$ -$ Eliminated as the RCC alternative is an uncontrolled weir crest at the spillway, where embankment option had (3) 44 ft wide radial ga0.6Power Intake (Inc Inlet exec and Inlet Structure Civil Works for Outle(same as embankment dam0.61Intake Structure and Approach0.611ExcavationOverburden68,000 CY14.87$ 1,011,000$ 272,000 Cyd calculated Excavation Volume. Assume 25% is overburdeRock Usable204,000 CY40.27$ 8,215,000$ 272,000 Cyd calculated Excavation Volume. Assume 75% is rock exc0.613Surface PreparationHorizontal 112,500 SF2.30$ 259,000$ Calculated 112,500 sq ftInclined60,300 SF3.33$ 201,000$ Calculated 60,300 sq ft0.614Concrete and ShotcreteStructureConcrete Structure 121,000 CY544.85$ 65,927,000$ Same as embankment, as power intake and outlet structure intake will be simConcrete - Apron Slab3,500 CY545.85$ 1,910,000$ Same as embankment, as power intake and outlet structure intake will be simConcrete Overbreak 12" H/6" V0CY336.99$ -$ No Overbreak if formed integral to damReinforcing Stee7,870 TON2,887.51$ 22,725,000$ Same as embankment, as power intake and outlet structure intake will be sim0.615Supports and Anchors- 1" @ 15400 EA735.81$ 294,000$ 0.61cMechanicalTrashracks and Guides4 SETS 1,080,960.00$ 4,324,000$ Revised Qty from 6 to 4Gate Equipment4 EA1,902,720.00$ 7,611,000$ Revised Qty from 6 to 4Bulkhead Gates Guides4 SETS225,200.00$ 901,000$ Revised Qty from 6 to 4Bulkhead Gates inc Followe1 SET698,120.00$ 698,000$ Shutter with Guides4 SETS720,640.00$ 2,883,000$ Revised Qty from 6 to 4Iceboom with Hois 4 SETS 1,238,600.00$ 4,954,000$ Revised Qty from 6 to 4Iceboom Guides4 SETS563,000.00$ 2,252,000$ Revised Qty from 6 to 4Intake Service Crane1 EA693,700.00$ 694,000$ Bubbler System1 LS948,000.00$ 948,000$ Misc Electrical1 LS237,000.00$ 237,000$ 0.61dIntake Building1 LS237,000.00$ 237,000$ 0.7Surge ChamberNo Surge Chamber for Surface Powerhouse Alternativ0.71Surge ChamberNo Surge Chamber for Surface Powerhouse AlternativPage 31 of 61
Page 32 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)0.711ExcavationNo Surge Chamber for Surface Powerhouse AlternativChamber Rock 0 CY90.12$ -$ No Surge Chamber for Surface Powerhouse AlternativVent Shaft Rock0CY601.04$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.713Surface Preparation0 SF2.30$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.714Concrete and ShotcreteNo Surge Chamber for Surface Powerhouse AlternativConcrete0CY513.35$ -$ No Surge Chamber for Surface Powerhouse Alternativ Concrete Overbreak0CY440.92$ -$ No Surge Chamber for Surface Powerhouse AlternativReinforcing Stee0 TON2,858.29$ -$ No Surge Chamber for Surface Powerhouse Alternativ4" Shotcrete0 SF10.13$ -$ No Surge Chamber for Surface Powerhouse AlternativVent ShaftNo Surge Chamber for Surface Powerhouse Alternativ2" Shotcrete0 SF5.26$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.715Supports and AnchorsNo Surge Chamber for Surface Powerhouse AlternativRockbolts 1" @25' HY0 EA1,234.86$ -$ No Surge Chamber for Surface Powerhouse AlternativRockbolts 1" @ 15'0 EA735.81$ -$ No Surge Chamber for Surface Powerhouse AlternativSteel Mesh0 SF5.81$ -$ No Surge Chamber for Surface Powerhouse AlternativSteel Support0 TON12,671.94$ -$ No Surge Chamber for Surface Powerhouse AlternativVent ShaftNo Surge Chamber for Surface Powerhouse AlternativRock bolts 3/4" @ 60 EA327.15$ -$ No Surge Chamber for Surface Powerhouse AlternativSteel Mesh0 SF6.30$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.717Drainage Holes (In Chamber0 LF47.95$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.71cMechanicalNo Surge Chamber for Surface Powerhouse AlternativStoplog Guides 0 SETS 709,380.00$ -$ No Surge Chamber for Surface Powerhouse AlternativStoplog Includes Followe0 SET3,558,160.00$ -$ No Surge Chamber for Surface Powerhouse Alternativ0.8Penstocks(same as embankment dam0.81Penstocks(same as embankment dam0.811Excavation(same as embankment damTunnels(same as embankment damRock Horizontal 53,400 CY144.77$ 7,731,000$ (same as embankment damRock Inclined54,000 CY286.15$ 15,452,000$ (same as embankment dam0.813Surface Preparation/Grouting(same as embankment damSurface Preparation(same as embankment damTunnels378,000 SF3.33$ 1,259,000$ (same as embankment damContact Grouting (same as embankment damContact Grouting1 LS574,582.80$ 575,000$ (same as embankment damConsolidation Grouting(same as embankment damConsolidation Grouting1 LS797,268.00$ 797,000$ (same as embankment dam0.814Concrete and Shotcrete(same as embankment damConcrete Liner37,200 CY970.01$ 36,084,000$ (same as embankment damConcrete Overbreak 6"10,600 CY692.87$ 7,344,000$ (same as embankment damReinforcing Steel 27 TON2,858.29$ 77,000$ (same as embankment dam3" Shotcrete34,000 SF7.69$ 261,000$ (same as embankment dam2" Shotcrete20,800 SF5.26$ 109,000$ (same as embankment dam0.815Support and Anchors(same as embankment damRockbolts 1" @ 25'150 EA1,234.86$ 185,000$ (same as embankment damRockbolts 1" @ 6'4,200 EA327.15$ 1,374,000$ (same as embankment damSteel Mesh193,000 SF6.37$ 1,229,000$ (same as embankment dam0.818Structural Misc Steelwork2,400 TON9,673.24$ 23,216,000$ (same as embankment dam0.9Tailrace Works (1 Portal with Combined Tailrace/Diversion Tunne0.91Tailrace Tunnels/Portals 0.911ExcavationTunnelsRock0CY103.00$ -$ Portals Overburden0CY17.14$ -$ Rock Usable0CY49.16$ -$ Rock Waste 0 CY49.16$ -$ 0.913 Surface PreparationTunnelsTunnels 0 SF 3.33$ -$ Portals Horizontal 0 SF 2.30$ -$ Inclined0 SF3.33$ -$ 0.914Concrete and ShotcreteTunnelsConcrete Lining0CY440.92$ -$ Concrete Overbreak 6"0CY314.94$ -$ 2" Shotcrete0 SF5.26$ -$ Reinforcing Stee0 TON2,887.51$ -$ Portals Concrete Base Slab0CY651.93$ -$ Concrete Walls0CY651.93$ -$ Concrete Overbreak 12" H/6" V0CY471.65$ -$ Reinforcing Stee0 TON2,887.51$ -$ 0.915Support and Anchors Tunnels Rockbolts 1" @ 12'0 EA528.34$ -$ Rockbolts 1" @ 9' 0 EA432.12$ -$ Steel Support 0 TONS12,801.49$ -$ Steel Mesh0 SF6.37$ -$ PortalsRockbolts 1" @ 15'0 EA735.81$ -$ 0.91cMechanical Stoplog Guides 0 SET112,600.00$ -$ Stoplogs Includes Followe0 SET751,200.00$ -$ 0.92Tailrace Outlet ChannelTailrace Outlet Channel Concrete - Slab4,190 CY544.85$ 2,280,000$ Calculated Qty. Unit price from item 0.614. New item for surface powerhouse alternatiTailrace Outlet Channel Concrete - Training Walll1,185 CY544.85$ 650,000$ Calculated Qty. Unit price from item 0.614. New item for surface powerhouse alternatiTailrace Reinforcing Stee440 TON2,858.29$ 1,260,000$ Calculated Qty based on original Ratio of reinforcing steel to concrete volume for draft tubes (660/8000). New item for surface powerhouse alterna1,701,500,000$ for embankment dam $ 3,202,800,000333Waterwheels, Turbines and Generators0.11Turbines and GovernorsCopied from Low Watana Non Expandabl0.111 SupplyCopied from Low Watana Non Expandabl0.112 InstallCopied from Low Watana Non ExpandablIncluded Qty in Item 331 - Powerplant ImprovementsPage 32 of 61
Page 33 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)0.2Generators and ExcitersCopied from Low Watana Non Expandabl0.21 Generators and Exciters (Supply and InstalCopied from Low Watana Non Expandabl0.211 Generators and ExcitersCopied from Low Watana Non Expandabl0.3 Total Bid From Vendor (includes all equipment in this categor4 EA74,200,000.00$ 297,000,000$ 297,000,000$ Copied from Low Watana Non ExpandablAverage from acquired quotesCopied from Low Watana Non ExpandablCopied from Low Watana Non Expandabl334Accessory Electrical Equipment0.1Connections, Supports and Structures0.11Structures0.111Structures (included Below0.12 Conductors and Insulators0.121Generator Isolated Phase Bus1 LS5,056,000.00$ 5,060,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.122HV Power Cables and Accessories1 LS2,054,000.00$ 2,050,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.123LV Power Cables and Accessories1 LS948,000.00$ 950,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.124Control Cables and Accessories1 LS1,738,000.00$ 1,740,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.125Grounding System1 LS237,000.00$ 240,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.13Conduits and Fittings0.131Conduits and Fittings1 LS632,000.00$ 630,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.2Switchgear and Control Equipmen0.21Auxiliary Transformers0.211Auxiliary Transformers4 EA83,811$ 340,000$ 0.22Circuit Breakers Generators-$ 0.221 Circuit Breakers Generators4 EA1,504,300$ 6,020,000$ 0.23Surge Protectors and Generator Cubicle0.231 Surge Protectors and Generator Cubicle1 LS726,800.00$ 730,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.24Switch boards0.241Switch boards1 LS1,232,400.00$ 1,230,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.25Auxiliary Power Equipmen0.251Auxiliary Power Equipmen1 LS347,600.00$ 350,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.3Cubicles and Appurtenances0.31Control, relay and meter board0.311 Control, relay and meter board1 LS1,422,000.00$ 1,420,000$ Multiply Full Watana Unit Cost by 4/6 due to turbine reductio0.32Computer Control System0.321Computer Control System(Included in Trans-Ems)0.33Supervisor and Telemeter System0.331Supervisor and Telemeter SystemIncluded in Trans EMS)0.4Power Transformers 0.41Power Transformers 0.411Power Transformers 7 EA2,000,000$ 14,000,000$ Copied from Low Watana Non Expandabl0.5Lighting SystemCopied from Low Watana Non Expandabl0.51 Powerhouse and Transformer GalleryCopied from Low Watana Non Expandabl0.511 Powerhouse and Transformer Gallery1 LS1,824,900.00$ 1,820,000$ Copied from Low Watana Non Expandabl0.52Access Tunnels and Roads0.521Access Tunnels and Roads0 LS402,900.00$ -$ Included in Site Roads0.6Misc. Electrical EquipmenCopied from Low Watana Non Expandabl0.61Misc. Electrical EquipmenCopied from Low Watana Non Expandabl0.611Misc. Electrical Equipmen1 LS625,680.00$ 630,000$ Copied from Low Watana Non ExpandablCopied from Low Watana Non Expandabl0.7Surface Accessory EquipmentCopied from Low Watana Non Expandabl0.71 34.5 kV and LV EquipmentCopied from Low Watana Non Expandabl0.711 Switchboard1 LS213,300$ 210,000$ Copied from Low Watana Non Expandabl0.712Cables1 LS450,300$ 450,000$ Copied from Low Watana Non Expandabl0.713Aux Transformers 1 LS284,400$ 280,000$ Copied from Low Watana Non Expandabl0.73Diesel Generator- StandbyCopied from Low Watana Non Expandabl0.731 Diesel Generator- Standby2 EA347,550$ 700,000$ Copied from Low Watana Non Expandabl0.74 Exterior Lighting Copied from Low Watana Non Expandabl0.741 Exterior Lighting 1 LS355,500$ 360,000$ Copied from Low Watana Non Expandabl0.75Mimic Board- Control BuildingCopied from Low Watana Non Expandabl0.751 Mimic Board- Control Building1 LS1,185,000$ 1,190,000$ Copied from Low Watana Non Expandabl40,000,000$ 335Misc Powerplant Equipment0.1Auxiliary Systems- UndergroundCopied from Low Watana Non Expandabl0.11 Station Water SystemsCopied from Low Watana Non Expandabl0.111 Station Water Systems 1 LS2,488,500.00$ 2,490,000$ Copied from Low Watana Non Expandabl0.12Fire Protection SystemsCopied from Low Watana Non Expandabl0.121 Fire Protection Systems1 LS1,422,000.00$ 1,420,000$ Copied from Low Watana Non Expandabl0.13Compressed Air SystemsCopied from Low Watana Non Expandabl0.131 Compressed Air Systems1 LS1,777,500.00$ 1,780,000$ Copied from Low Watana Non Expandabl0.14Oil Handling SystemsCopied from Low Watana Non Expandabl0.141 Oil Handling Systems1 LS1,185,000.00$ 1,190,000$ Copied from Low Watana Non Expandabl0.15Drainage & DewateringCopied from Low Watana Non Expandabl0.151 Drainage & Dewatering2 EA1,738,000$ 3,480,000$ Copied from Low Watana Non Expandabl0.16Heating, Ventilation and Cooling SystemCopied from Low Watana Non Expandabl0.161 Heating, Ventilation and Cooling System1 LS1,777,500.00$ 1,780,000$ Copied from Low Watana Non Expandabl0.17MiscellaneousCopied from Low Watana Non Expandabl0.171 Miscellaneous1 LS1,185,000.00$ 1,190,000$ Copied from Low Watana Non Expandabl0.2Auxiliary Systems- Surface FacilitiesCopied from Low Watana Non Expandabl0.21Auxiliary Systems- Surface FacilitiesCopied from Low Watana Non Expandabl0.211Auxiliary Systems- Surface Facilities1 LS711,000$ 710,000$ Copied from Low Watana Non Expandabl0.3Auxiliary EquipmentCopied from Low Watana Non Expandabl0.31 Powerhouse Cranes Copied from Low Watana Non Expandabl0.311 Powerhouse Cranes 2 EA 1,800,000$ 3,600,000$ Copied from Low Watana Non Expandabl0.32 Elevators Copied from Low Watana Non Expandabl0.321 Elevators 2 EA 181,700$ 360,000$ Copied from Low Watana Non Expandabl0.33 Miscellaneous Cranes and HoistsCopied from Low Watana Non Expandabl0.331 Miscellaneous Cranes and Hoists1 LS505,500$ 510,000$ Copied from Low Watana Non Expandabl0.34Machine Shop EquipmentCopied from Low Watana Non Expandabl0.341 Machine Shop Equipment1 LS2,022,000$ 2,020,000$ Copied from Low Watana Non Expandabl0.4General Station Equipment(Included in Mechanical And Electrical SystemsCopied from Low Watana Non Expandabl0.5 Communications Equipmen1 LS 106,650.00$ 110,000$ Copied from Low Watana Non ExpandablPage 33 of 61
Page 34 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)21,000,000$ 336Roads, Rails and Air Facilities 0.1Roads 0.11Pioneer Roads and Bridges0.111Gold Creek- Watana Road (58 mi)Clearing 0ACRE11,416.62$ -$ Rail Only Access to SiteWaste Excavation0CY9.51$ -$ Rail Only Access to SiteCommon Excavation0CY8.32$ -$ Rail Only Access to Site18" Culverts 0 LF62.55$ -$ Rail Only Access to Site36" Culverts0 LS32,760.98$ -$ Rail Only Access to SiteD-1 Base Materia0 TON45.47$ -$ Rail Only Access to SiteFabric0SY6.73$ -$ Rail Only Access to SiteMaintenance 0 MI/YR9,008.99$ -$ Rail Only Access to Site0.112Gold Creek- ParksRoad (41.25 Miles )Clearing 0ACRE11,416.62$ -$ Rail Only Access to SiteWaste Excavation0CY9.51$ -$ Rail Only Access to SiteCommon Excavation0CY8.32$ -$ Rail Only Access to Site18" Culverts 0 LF62.55$ -$ Rail Only Access to Site36" Culverts0 LS35,451.31$ -$ Rail Only Access to SiteD-1 Base Materia0 TON45.47$ -$ Rail Only Access to SiteFabric0SY6.73$ -$ Rail Only Access to SiteMaintenance 0 MI/YR9,008.32$ -$ Rail Only Access to Site0.113Devil Canyon Low Level CrossingCrossing (7.88 Miles) Clearing 0ACRE11,416.62$ Rail Only Access to SiteWaste Excavation0CY9.51$ Rail Only Access to SiteCommon Excavation0CY8.32$ Rail Only Access to SiteRock Excavation0CY28.45$ Rail Only Access to Site18" Culverts 0 LF62.55$ Rail Only Access to SiteBridge0 LS120,000,000.00$ Rail Only Access to SiteD-1 Base Materia0 TON45.47$ Rail Only Access to SiteMaintenance 0 MI/YR11,258.74$ Rail Only Access to SiteRail Only Access to Site0.114Gold Creek- Watana (41.25 miles0 LS28,132,000$ Rail Only Access to Site0.12Permanent Roads and Bridges0.124 Parks Highway to Watana (62 mi0 MI3,000,000.00$ -$ Rail Only Access to Site0.125 Susitna Bridge0 SF450.00$ -$ Rail Only Access to Site0.2Rail Facilities0.24Permanent Railroad (including railheads0.244Gold Creek to Watana- RaiR-1, (33 Mi)Clearing671AC11,416.62$ 7,662,183$ Left the same as Full RCC AlternativeWaste Excavation1687883 CY9.51$ 16,051,766$ Left the same as Full RCC AlternativeCommon Excavation3307678 CY8.32$ 27,519,880$ Left the same as Full RCC AlternativeRock Excavation9114 CY28.51$ 259,867$ Left the same as Full RCC AlternativeBorrow449500 CY11.88$ 5,340,060$ Left the same as Full RCC AlternativeSubballast711055 CY18.15$ 12,902,807$ Left the same as Full RCC AlternativeGrade "A" Base Materia6650 CY35.45$ 235,729$ Left the same as Full RCC AlternativeD-1 Base materia2400 TON43.20$ 103,680$ Left the same as Full RCC AlternativeA.C. Surfacing2200 TON198.00$ 435,600$ Left the same as Full RCC AlternativeDock Lumber16 MBF1,258.60$ 20,138$ Left the same as Full RCC Alternative18" Culvert20093 LF68.26$ 1,371,458$ Left the same as Full RCC Alternative36" + Culverts0 LS92,160.00$ -$ Left the same as Full RCC AlternativeFabric12930 SY9.00$ 116,369$ Left the same as Full RCC AlternativeThaw Pipes41843 LF95.04$ 3,976,745$ Left the same as Full RCC AlternativeTopsoil & Seed431AC10,800.00$ 4,653,257$ Left the same as Full RCC AlternativeRail Yard Control Devices1 LS1,800.00$ 1,800$ Left the same as Full RCC AlternativeBridges0 SF900.00$ -$ Left the same as Full RCC AlternativeTrackage325940 LF350.00$ 114,079,000$ Left the same as Full RCC AlternativeMaintenanceRail406 Mile-years10,000.00$ 4,060,000$ Left the same as Full RCC AlternativeRailhead7years75,000.00$ 525,000$ Left the same as Full RCC Alternative0.13Site Roads0.131Construction RoadsSite Roads20 Mile750,000.00$ 15,000,000$ Left the same as Full RCC Alternative. Revised Unit Price to $750,000 (Same as Low Watana Non Expandable, Full RCC $12,554,637.62 seems higMaintenance102 MI/YRS 223,092.85$ 22,755,000$ Reduced Full RCC Qty by ratio of Construction Time 4 yr / 5.5 y0.132Permanent RoadsPermanent Roads6 MILE1,287,997.42$ 7,728,000$ Left the same as Full RCC Alternative0.3 Airstrip0.31AirstripPermanent Airstrip1 LS12,798,000.00$ 12,798,000$ Left the same as Full RCC Alternative9 years maintenance savings1LSTemporary Airstrip1 LD2,133,000.00$ 2,133,000$ Left the same as Full RCC Alternative0.4Saved Maintenance1LS(5,067,889.52)$ (5,068,000)$ Left the same as Full RCC Alternative254,700,000$ Transmission Plant350Land and Land Rights Land and Land RightsTransmission33 MILE86,720.00$ 2,862,000$ Copied from Low Watana Non ExpandablSubstations (4 Sites)0 LS2,607,000.00$ -$ Left the same as Full Watana RCC2,862,000$ 352Substation and Switching StationPage 34 of 61
Page 35 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)0.1Switchyard0.11Switchyard2 LS14,000,000.00$ 28,000,000$ Left the same as Full Watana RCC28,000,000$ 353Substation/Switching Station EquipmentEster0 LS57,922,800.00$ -$ Willow0 LS3,613,020.00$ -$ Knik Arm0 LS29,838,300.00$ -$ University0 LS88,685,400.00$ -$ Devil Canyon0 LS35,585,550.00$ -$ Willow Energy Management System (EMSEquipment and System Costs0 LS27,326,100.00$ -$ Microwave Communication Equipmen0 LS11,660,400.00$ -$ EMS Control Center Building0 LS9,148,200.00$ -$ Watana and Devil Canyon In-plant Monitor and Control Equipmen0 LS8,619,690.00$ -$ -$ 354Steel Towers and FixturesTowers (Including Foundation and Hardware33 miles4,500,000.00$ 148,500,000$ Used same length as Transmission Land Right148,500,000$ 356Conductors and DevicesConductors0 MILE218,281.33$ -$ Submarine Cables0 EACH 15,808,340.56$ -$ -$ 359Roads and TrailsRoads and Trails200 MILE75,744.00$ 15,149,000$ Left the same as Full Watana RCCClearing and Roads340 MILE37,872.00$ 12,876,000$ Left the same as Full Watana RCC28,000,000$ 207,362,000$ General Plant389Land and Land RightsLand and Land Rights-$ 390Structures and ImprovementsStructures and Improvements-$ 391Office Furniture and EquipmentOffice Furniture and Equipmen-$ 392Transportation EquipmentTransportation Equipmen-$ 393Stores EquipmentStores Equipment-$ 394Tools Shop and Garage EquipmentTools Shop and Garage Equipmen-$ 395Laboratory EquipmentLaboratory Equipmen-$ 396Power-Operated EquipmentPower-Operated Equipmen-$ 397Communications EquipmentCommunications Equipmen-$ 398Miscellaneous EquipmentMiscellaneous Equipmen-$ 399Other Tangible PropertyOther Tangible Property1 LS16,000,000$ 16,000,000$ Copied from Low Watana Non ExpandablSaved Maintence1LS(231,220)$ (231,000)$ Copied from Low Watana Non Expandabl15,800,000$ Indirect Costs61Temporary Construction FacilitiesTemporary Construction Facilities62Construction EquipmentConstruction Equipment63Main Construction Camp 0.1Main Construction Camp1 LS316,340,280$ Reduce Unit price by ratio of Low Watana Volume to High Watana Volume = (7.6/15.Saved Maintence1LS(6,172,493.27)$ Site Preparation3270533Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0Buildings15019120Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0utilities12172667Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.030462320 5 152,311,600.00$ Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0MAIN CONSTRUCTION VILLAGEsite prep3540080Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0buildings10008187Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0utilities4914160Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.018462426.67 5 92,312,133.33$ 152,311,600$ 123,800,000$ Camp cost to reflect lower volume ( 0.8125) *Previous Estimate doesn't total Con. Camp Costs Correctly64Labor ExpenseLabor Expense(Included In Direct Costs)65SuperintendenceSuperintendence(Included In Direct Costs)Page 35 of 61
Page 36 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantityUnitsUnit Price Line PriceTotalNotes / RemarksDescriptionLow Watana RCC (Non Expandable) Alternative (4 Turbines)66InsuranceInsurance(Included In Direct Costs)68Mitigation Fishery, Terrestrial and RecrationalMitigation(Not included in 1982 study)-$ 69FeesFeesSubtotalDirect Construction Cost2,903,300,000$ Contingency21.313%618,800,000$ Used Same Contingency as Full RCCSubtotal71AEngineering (4%), Enviornmental (2%), Regulatory(1%) and Construction Management (7%203,200,000$ 71BConstruction Management (4%)4%116,100,000$ 72Legal Expenses0%75Taxes0%76Administrative & Gen. Expenses0%77Interest0%80Earnings/Expenses During Construction0%Total Project Cost3,841,400,000$ r of Years for Base Case20.5 yearsof Years for Full Watana16.5 yearsPage 36 of 61
Page 37 of 61Copied Full Watana DataDenotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / Remarks330Land and Land Rights0.1Land1 LS120,870,000.00$ 120,870,000$ 0.2Land RightsIncluded Above0.3Misc Charges in Credit AboveIncluded Above120,900,000$ 331Powerplant Structure Improvements0.1Powerhouse0.11Powerhouse and Draft Tube0.111ExcavationPowerhouse Rock1,336,761 CY43.72$ 58,443,000$ Multiply by ratio of increased structure length (485/365) = 1.329, Plus additional 10%Powerhouse Overburden891,174 CY11.53$ 10,275,000$ Multiply by ratio of increased structure length (485/365) = 1.329, Plus additional 10%Draft Tube Rock0 CY90.12$ -$ Total Total Estimate0.113Surface Preparation/ GroutingPowerhouse143,532 SF3.33$ 478,000$ Multiply by ratio of increased structure length (485/365) = 1.329Draft Tube0 SF3.33$ -$ Grout Curtain- Drill holes63,393 LF27.63$ 1,752,000$ Multiply by ratio of increased structure length (485/365) = 1.329Grout Curtain- Cement25,251 CF81.10$ 2,048,000$ Multiply by ratio of increased structure length (485/365) = 1.3290.114Concrete and Shot CretePowerhouse Concrete 82,871 CY544.85$ 45,150,000$ Multiply by ratio of increased structure length (485/365) = 1.329Powerhouse Concrete Overbreak0 CY447.21$ -$ Powerhouse Reinforcing Steel4,144 TON2,858.29$ 11,840,000$ Multiply by ratio of increased structure length (485/365) = 1.329Powerhouse 4" Shotcrete0 SF10.14$ -$ Draft Tube Concrete0 CY692.87$ -$ Draft Tube Concrete Overbreak0 CY447.21$ -$ Draft Tube Reinforcing Steel0 TON2,858.29$ -$ Draft Tube 2" Shotcrete0 SF5.45$ -$ 0.115Support and AnchorsPowerhouse Rockbolts 1" @ 25' Hy197 EA1,234.86$ 240,000$ Multiply by ratio of increased structure length (485/365) = 1.329Powerhouse Rockbolts 1" @ 15' 400 EA735.81$ 290,000$ Multiply by ratio of increased structure length (485/365) = 1.329Powerhouse Steel Mesh9,065 SF5.81$ 50,000$ Multiply by ratio of increased structure length (485/365) = 1.329Powerhouse Steel Support28 TON12,671.94$ 350,000$ Multiply by ratio of increased structure length (485/365) = 1.329Draft Tube Rockbolts 1" @ 25' Hy0 EA1,234.86$ -$ Draft Tube Rockbolts 1" @ 12'0 EA528.34$ -$ Draft Tube Rockbolts 1" @ 9'0 EA432.12$ -$ Draft Tube Steel Mesh0 SF6.55$ -$ 0.117Holes (U/S of Powerhouse)0 LF51.32$ -$ Holes (Powerhouse Crown)0 LF51.32$ -$ 0.118Structural- Misc Steelwork-$ Powerhouse and Draft Tube- Steel Crane Rails1 LS10,276,309.00$ 10,280,000$ *Same as Full Watana0.119Architectural- Powerhouse1 LS7,309,500.00$ 7,310,000$ Multiply by ratio of increased structure length (485/365) = 1.329y0.11cMechanical Draft Tube Gates6 SETS427,880.00$ 2,567,000$ Updated Qty for 6 total baysDraft Tube Gate Guides6 SETS202,680.00$ 1,216,000$ Updated Qty for 6 total baysDraft Tube Crane1 LS1,140,000.00$ 1,140,000$ 0.12Access Tunnels and Portals 0.121ExcavationMain Tunnel0 CY97.45$ -$ Transformer Gallery Tunnel0 CY97.45$ -$ Grouting Gallery Tunnel0 CY396.04$ -$ Surge Chamber Access Tunnel0 CY145.22$ -$ Penstock Access Tunnel0CY145.22$ -$ Penstock Elbow Access Tunnel0 CY145.22$ -$ Access Shaft Tunnel0 CY145.22$ -$ Connector Tunnel0 CY379.26$ -$ Portals Overburden0 CY17.14$ -$ Portals Rock0 CY49.31$ -$ 0.123Surface Preparation Main Tunnel Slab0 SF2.21$ -$ Penstock Access Slab0 SF2.21$ -$ Horizontal Portal 0 SF2.30$ -$ Inclined Portal0 SF3.33$ -$ 0.124Concrete and Shot CreteMain PortalConcrete Slab0 CY406.27$ -$ Concrete Walls0 CY406.27$ -$ Concrete Overbreak0 CY368.48$ -$ Reinforcing Steel0 TON2,887.51$ -$ TunnelsConcrete Slab Main Tunnel0 CY503.90$ -$ Concrete Plugs Penstock Elbow ACC0 CY755.86$ -$ Concrete Overbreak Main Tunnel 6"0 CY346.43$ -$ Reinforcing Steel0 TON2,887.51$ -$ DescriptionHDR/AEA Susitna Hydroelectric ProjectCost Estimates for 1982 quantities- AlternativesBy: DTABy: Leanne Andruszkiewicz, EIT Date: 1/25/09Reviewed By: David Elwood, EIT Date: 1/25/09, Modified by Hatch Acres_mb_061109, R&M 11/16/09Alternatives- 2008 DollarsLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Low Watana RCC (Non-Expandable) Estimate 10/28/10 used as basisModified by Hatch Associates Consultants, Inc._RST_10/28/10Page 37 of 61
Page 38 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)2 " Shotcrete Main Tunnel0 SF5.26$ -$ 2 " Shotcrete Transformer Gal0 SF5.26$ -$ 2 " Shotcrete Surge Chamber Acc0 SF5.26$ -$ 2 " Shotcrete Penstock Access 0 SF5.26$ -$ 2 " Shotcrete Penstock Elbow Acc0 SF5.26$ -$ 2 " Shotcrete Access Shaft0 SF5.26$ -$ 2 " Shotcrete Grout Gallery0 SF5.26$ -$ 2 " Shotcrete Connector Tunnel0 SF5.26$ -$ 0.125Support and AnchorsMain TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Main Tunnel Portal-$ Rockbolts 1" @15'0 EA735.79$ -$ Transformer Gallery Tunnel -$ Rockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF5.89$ -$ Steel Support0 TON12,801.49$ -$ Grouting Gallery Tunnel-$ Rockbolts 3/4" @ 6'0 EA327.15$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Surge Chamber Access Tunnel-$ Rockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Penstock Access TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Penstock Elbow Access TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Access Shaft TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Connector TunnelRockbolts 3/4" @ 6'0 EA327.15$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ 0.129Architectural- Main Portal Doors0 SETS158,371.90$ -$ 0.12cMechanical Ventilation System Included in (63.81 and 63.82)0.13Access Shaft0.131Excavation Rock0 CY227.67$ -$ 0.133Surface Preparation Shaft0 SF3.33$ -$ 0.134Concrete and Shot CreteConcrete Lining0 CY944.82$ -$ Concrete Overbreak 6"0 CY551.14$ -$ 0.135Support and Anchors - Rockbolts 3/4" @ 6'0 EA327.15$ -$ 0.138Structural Misc Steelwork0 TON7,395.00$ -$ 0.139Architectural- control Building 0.13cMechanical Elevators0 LS2,368,815.00$ -$ 0.14Fire Protection Head Tank0.141Excavation0 CY43.72$ -$ 0.143Surface Preparation0 SF2.30$ -$ 0.144Concrete & ShotcreteConcrete 208 CY963.72$ 200,000$ Concrete Overbreak 6"0 CY406.27$ -$ Reinforcing Steel8 TON2,858.29$ 20,000$ 0.145Support and AnchorsRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.30$ -$ Steel Support0 TON12,671.95$ -$ 0.148Misc Steelwork1 LS73,297.50$ 70,000$ *Same as Full Watana0.14cMechanical Piping/Valves 0.15Bus Tunnels (totals for 3 Bus Tunnels)0.151ExcavationRock Horizontal0 CY213.70$ -$ Rock Inclined0 CY601.04$ -$ 0.153Surface Preparation- Tunnels0 SF3.33$ -$ Page 38 of 61
Page 39 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)0.154Concrete and ShotcreteConcrete Slab0 CY818.84$ -$ Concrete Overbreak 12"0 CY472.41$ -$ Reinforcing Steel0 TON2,858.29$ -$ 2" Shotcrete0 SF5.26$ -$ 0.155Supports and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ Rockbolts 1" @ 12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.30$ -$ Steel Support0 TON12,671.94$ -$ 0.16Transformer Gallery Tunnel0.161Excavation- Rock 0 CY87.44$ -$ 0.163Surface Preparation0 SF2.30$ -$ 0.164Concrete and ShotcreteConcrete Base Slab0 CY544.85$ -$ Concrete Overbreak 12"H/6"V0 CY377.93$ -$ Reinforcing Steel0 TON2,858.29$ -$ 0.165Support and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ Rockbolts 1" @ 15'0 EA735.81$ -$ Steel Mesh0 SF5.81$ -$ Steel Support0 TON12,671.94$ -$ 0.167Drainage Holes 0 LF47.95$ -$ 0.17Cable Shafts 0.171Excavation Rock0 CY601.04$ -$ 0.173Surface Preparation Shafts0 SF3.33$ -$ 0.174Concrete and ShotcreteConcrete Lining0 CY1,763.66$ -$ Concrete Overbreak 6"0 CY881.83$ -$ 0.175Supports and Anchors- Rockbolts 3/4" @ 6'0 EA327.15$ -$ 0.178Structural Steel Support Towers12 TON15,602.00$ 190,000$ 0.179Architectural- Enclosures0 LS199,317.00$ -$ 0.17cMechanical Hoist0 EA476,960.00$ -$ 0.18Dewatering (during Construction)0.181Dewatering (Power Facilities)1 LS1,336,798.50$ 1,340,000$ *Same as Full Watana0.19Instrumentation0.191Instrumentation1 LS1,714,813.50$ 1,710,000$ *Same as Full Watana0.2Misc Buildings (Control Buildings)1 LS4,433,085.00$ 4,430,000$ *Same as Full Watana0.3Permanent Town(included in 63.5)161,389,000$ 332Reservoir, Dams and Waterways0.1Reservoir0.11Reservoir Clearing37,500 ACRE3,005.85$ 112,719,000$ Copied Full Watana Data0.2Diversion Schemes /Cofferdams0.21Diversion Tunnels /Portals-$ 0.211Excavation-$ Combined Tunnels-$ Rock203,285 CY92.33$ 18,770,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Combined Upstream Portals-$ Rock35,000 CY49.16$ 1,720,000$ Combined Downstream Portals-$ Rock Usable75,000 CY49.16$ 3,690,000$ Emergency Release Chambers-$ Excavate Concrete for Plugs1,139 CY101.98$ 120,000$ Gate Chamber 2,975 CY110.73$ 330,000$ Access Tunnel to Gate Chamber-$ Rock0 CY97.15$ -$ 0.212Fill- Temp for Coffer Dam to Construct Upstream Portals23,000 CY11.66$ 270,000$ 0.213Surface Preparation \ grouting-$ Upstream Upper Portal -$ Horizontal 3,200 SF2.30$ 10,000$ Inclined8,600 SF3.33$ 30,000$ Upstream Lower Portal -$ Horizontal 1,300 SF2.30$ -$ Inclined14,900 SF3.33$ 50,000$ Downstream Upper Portal-$ Horizontal 6,100 SF2.30$ 10,000$ Inclined20,500 SF3.33$ 70,000$ Downstream Lower Portal-$ Horizontal 600 SF2.30$ -$ Inclined5,600 SF3.33$ 20,000$ Grout Upper Tunnel Plugs -$ Drill Holes 4,100 LF26.76$ 110,000$ Cement820 CF81.10$ 70,000$ Grout Lower Tunnel Permanent Plugs-$ Drill Holes 2,050 LF26.76$ 50,000$ Cement410CF81.10$ 30,000$ 0.214Concrete and Shotcrete-$ Combined Tunnels-$ Concrete Lining37,060 CY566.89$ 21,010,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Page 39 of 61
Page 40 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Concrete Lining Overbreak 6"16,350 CY314.94$ 5,150,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Reinforcing Steel 23 TON2,887.51$ 70,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Concrete Lining for Plug6,200 CY428.32$ 2,660,000$ 2" Shotcrete52,865 SF5.26$ 280,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Upstream Upper Portal-$ Concrete Headwall 3,200 CY651.93$ 2,090,000$ Concrete Lining 1,300 CY651.93$ 850,000$ Concrete Slab 750 CY651.93$ 490,000$ Concrete Piers800 CY651.93$ 520,000$ Concrete Overbreak 12" H/6"V300 CY472.41$ 140,000$ Reinforcing Steel 400 TON2,887.51$ 1,160,000$ Upstream Lower Portal -$ Concrete Headwall 4,500 CY651.93$ 2,930,000$ Concrete Lining 3,000 CY651.93$ 1,960,000$ Concrete Slab 300 CY651.93$ 200,000$ Concrete Piers700 CY651.93$ 460,000$ Concrete Overbreak 12" H/6"V350 CY472.41$ 170,000$ Reinforcing Steel 600 TON2,887.51$ 1,730,000$ Downstream Upper Portal-$ Concrete Headwall 500 CY651.93$ 330,000$ Concrete Slab 100 CY651.93$ 70,000$ Concrete Overbreak 12" H/6"V100 CY472.41$ 50,000$ Reinforcing Steel 40 TON2,887.51$ 120,000$ Downstream Lower Portal-$ Concrete Headwall 2,500 CY651.93$ 1,630,000$ Concrete Slab 100 CY651.93$ 70,000$ Concrete Overbreak 12" H/6"V150 CY472.41$ 70,000$ Reinforcing Steel 170 TON2,887.51$ 490,000$ Downstream Flip Bucket-$ Concrete Slab 0 CY651.93$ -$ Concrete Walls0 CY651.93$ -$ Concrete Invert0 CY651.93$ -$ Concrete Overbreak 12" H/6"V0 CY42.41$ -$ Reinforcing Steel 0 TON2,887.51$ -$ Downstream Retaining Wall-$ Concrete Slab 200 CY651.93$ 130,000$ Concrete Walls2,000 CY651.93$ 1,300,000$ Concrete Overbreak 12" H/6"V110 CY472.41$ 50,000$ Reinforcing Steel 90 TON2,887.51$ 260,000$ Emergency Release Chambers-$ Concrete Plug 5,500 CY 755.86$ 4,160,000$ 4" Shotcrete 1,000 SF 10.13$ 10,000$ Access Tunnel to Gate Chamber-$ 2" Shotcrete 0 SF 5.26$ -$ 0.215Supports and AnchorsCombined Tunnels-$ Rockbolts 1" @ 12'3,379 EA528.34$ 1,790,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Rockbolts 1" @ 9'578 EA432.12$ 250,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Steel Mesh202,740 SF6.37$ 1,290,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Steel Support207 TON12,801.49$ 2,650,000$ Multiplied Non Expandable Qty by ratio of length increase (4,470/4,100) = 1.09Upstream Lower Portal-$ Rockbolts 1" @ 15'240 EA735.81$ 180,000$ Anchors 1" @ 25'290 EA1,234.86$ 360,000$ Upstream Upper Portal -$ Rockbolts 1" @ 15'-$ Anchors 1" @ 25'130 EA735.81$ 100,000$ Downstream Lower Portal-$ Rockbolts 1" @ 15'200 EA735.81$ 150,000$ Downstream Upper Portal-$ Rockbolts 1" @ 15'100 EA735.81$ 70,000$ Retaining Wall Anchors 1" @25'100 EA1,234.86$ 120,000$ Emergency Release Chambers-$ Rockbolts 1" @ 25'63 EA1,234.86$ 80,000$ Rockbolts 1" @ 15'79 EA735.77$ 60,000$ Steel Mesh2,279 SF6.37$ 10,000$ Steel Support9 TON12,801.49$ 110,000$ Metal to Roof Anchors 3/4" @ 6'13 EA342.42$ -$ Access Tunnel to Gate Chamber-$ Rockbolts 1" @ 12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ 0.218Structural- Misc Steelwork2,775 SF93.61$ 260,000$ 0.21cMechanical-$ Upstream Lower Gates-$ Gate Equipment2 EA5,073,120.00$ 10,150,000$ Upstream Upper Gates-$ Gate Equipment2 EA2,840,080.00$ 5,680,000$ Trashracks1 LS1,777,500.00$ 1,780,000$ Downstream Lower Outlet -$ Stoplog Guides 1 LS142,200.00$ 140,000$ Page 40 of 61
Page 41 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Stoplogs includes follower1 LS1,967,100.00$ 1,970,000$ Downstream Upper Outlet -$ Stoplog Guides 1 LS82,950.00$ 80,000$ Low Level Release-$ Slide Gates Include Steel Liner9 EA3,517,470.00$ 31,660,000$ 0.22Upstream Cofferdam 0.221CofferdamRCC978,000 CY100.00$ 0.222Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 0.223 Cutoff Slurry Wall excavation5,100 CY4.88$ 25,000$ slurry wall46,000 SF72.44$ 3,332,000$ 0.22dDewatering Initial Dewatering 1 LS5,807,685.00$ 5,808,000$ Dewatering Maintenance1 LS22,377,990.00$ 22,378,000$ 0.23Down Stream Cofferdam0.231 Cofferdam RCC261,300 CY100.00$ 0.232Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 0.233 Cutoff Slurry Wall Excavation 5,100 CY4.60$ 23,000$ Slurry Wall46,000 SF72.44$ 3,332,000$ 0.3Main Dam0.31Main Dam0.311ExcavationOverburden above el. 1470367,381 CY11.53$ 4,236,000$ Overburden below el. 1470964,693 CY11.06$ 10,670,000$ Rock Usable above el. 1470233,739 CY43.03$ 10,058,000$ Rock Usable below el. 147086,677 CY43.72$ 3,790,000$ Rock Waste above el. 1470353,600 CY43.03$ 15,215,000$ Rock Waste below el. 1470157,669 CY50.18$ 7,912,000$ 0.312DamRCC7,600,000 CY100.00$ 760,000,000$ Base RCC0 CY100.00$ -$ 0.313Surface Prep/ GroutingSurface PreparationUnder Core/Filters above el. 1500911,200 SF3.11$ 2,834,000$ Under Core/Filters below el. 1500613,000 SF3.11$ 1,906,000$ Under Shell above el. 15002,821,184 SF2.15$ 6,066,000$ Under Shell below el. 15001,405,696 SF2.15$ 3,022,000$ Consolidation GroutDrill Holes 190,400 LF11.91$ 2,268,000$ Cement190,400 CF67.81$ 12,911,000$ Grout CurtainDrill Holes 252,960LF26.76$ 6,769,000$ Cement101,184 CF81.10$ 8,206,000$ Dental ConcreteDental Concrete85,000 CY365.33$ 31,053,000$ 0.317DrainageHoles73,984 LF51.32$ 3,797,000$ 0.318BridgePrecast Bridge Beams25,500 CY544.85$ 13,894,000$ Concrete Road Deck5,400 CY544.85$ 2,942,000$ Piers500 CY544.85$ 272,000$ 0.32Grout Galleries/Portals 0.321Excavation-$ Tunnels/ Shafts- Core Area-$ Rock Horizontal0 CY394.80$ -$ Rock Inclined0 CY552.93$ -$ Rock Vertical0 CY536.19$ -$ Tunnels/ Shafts- Access -$ Rock Horizontal1,300 CY394.80$ 510,000$ Rock Inclined200 CY552.93$ 110,000$ Portals -$ Overburden Rock2,900 CY17.16$ 50,000$ Rock800 CY49.16$ 40,000$ 0.323Surface Preparation-$ Portals -$ Horizontal 24 SF2.30$ -$ Inclined160 SF3.33$ -$ -$ 0.324Concrete and Shotcrete-$ Tunnels- Core Area-$ Concrete Plugs267 CY428.32$ 110,000$ Concrete Slab600 CY944.82$ 570,000$ Concrete Overbreak 6"0 CY755.86$ -$ Reinforcing Steel21 TON2,887.51$ 60,000$ Page 41 of 61
Page 42 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)2" Shotcrete0 SF5.26$ -$ Tunnels-Access-$ Concrete Slab160 CY944.82$ 150,000$ Concrete Overbreak 6"80 CY755.86$ 60,000$ Reinforcing Steel6 TON2,887.51$ 20,000$ 2" Shotcrete538 SF5.26$ -$ Shafts-$ 2" Shotcrete4,000 SF5.26$ 20,000$ Portals -$ Concrete16 CY406.36$ 10,000$ Reinforcing Steel2 TON2,887.51$ -$ 0.325Support and Anchors-$ Tunnels- Core Area-$ Rockbolts 3/4" @6'0 EA327.15$ -$ Steel Mesh0 SF5.37$ -$ Steel Support0 TON12,801.49$ -$ Tunnels- Access-$ Rockbolts 3/4" @6'120 EA327.15$ 40,000$ Steel Mesh110 SF5.37$ -$ Steel Support2 TON12,801.49$ 30,000$ Shafts -$ Rockbolts 3/4" @6'280 EA327.15$ 90,000$ Steel Mesh800 SF5.37$ -$ Portals -$ Rockbolts 1" @15'24 EA735.81$ 20,000$ 0.329Architectural Portal Doors-$ Portal Doors1 LS33,900.00$ 30,000$ 0.33Instrumentation -$ 0.331Instrumentation1 LS8,657,610.00$ 8,660,000$ 0.4Relict Channel-$ 0.41Shore Protection -$ 0.411Excavation -$ Overburden Stripping 2' thick2,200 CY11.56$ 30,000$ 0.412Fill -$ Dump and Spread-$ Filter Material - 2' layer 2,200 CY 31.93$ 70,000$ Rock Spalls/ Rip Rap- 3' Ave 3,300 CY 9.86$ 30,000$ Shore Protection -$ Rip Rap 24,000 CY 24.26$ 580,000$ Waste Rock 24,000 CY 22.78$ 550,000$ 0.44Channel Filter Blanket-$ 0.442Fill-$ Coarse Filter 2,900,000 CY33.85$ 98,170,000$ Fine Filter 2,180,000 CY43.65$ 95,160,000$ Rip Rap182,000 CY24.26$ 4,420,000$ 0.443Surface preparation-$ Foundation Prep -$ Clearing and Grubbing 460 ACRE3,963.11$ 1,820,000$ Excavation2,236,000 CY15.62$ 34,930,000$ 0.5Outlet Facilities 0.51Outlet Facilities- (Intake Civil Work Include in Power Intake )0.511ExcavationInlet (Included in 332.611)Outlet (Included in 332.521)Tunnels Rock Horizontal0 CY103.00$ -$ Rock Inclined 0 CY183.49$ -$ 0.513Surface Preparation/ Grouting Inlet (Included in 332.613)Outlet (Included in 332.523)Tunnels0 SF2.30$ -$ Contact Grouting0 LS569,428.05$ -$ 0.514Concrete and Shotcrete Inlet (Included in 332.614)Outlet (Included in 332.524)Tunnels Concrete Lining 0 CY944.82$ -$ Concrete Overbreak 6"0 CY440.92$ -$ 2" Shotcrete0 SF5.26$ -$ 3" Shotcrete0 SF7.69$ -$ 0.515Support and AnchorsInlet (Included in 332.615)Outlet (Included in 332.525)Tunnels Rock Bolts 1" @6'0 EA327.15$ -$ Steel Mesh0 SF6.37$ -$ 0.516Mechanical - Low Level OutletInlet Trash Racks/Guides 1 LS1,540,500.00$ 1,541,000$ Gate Equipment 2 EA3,317,040.00$ 6,634,000$ Stoplog Guides 2 SETS213,940.00$ 428,000$ Page 42 of 61
Page 43 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)OutletFixed Cone Valves 6 +1 Spare 1 LS 4,500,630.00$ 4,501,000$ Ring Follower Gates 6 EA 1,936,494.80$ 11,619,000$ Steel Manifold Liner 1,100 TON 8,952.53$ 9,848,000$ Misc Mechanical Equipment 1 LS 948,000.00$ 948,000$ Misc Electrical Systems 1 LS 237,000.00$ 237,000$ 0.52 Main (Chute ) Spillway (Includes Civil Works for Outlet Facilities)0.522 Stepped SpillwayConventional Concrete - Steps 55,300 CY 544.85$ 30,130,000$ Reinforcing Steel - Steps 1,340 TON 2,887.51$ 3,869,000$ Conventional Concrete - Training Walls 3,600 CY 544.85$ 1,961,000$ Reinforcing Steel - Training Walls 90 TON 2,887.51$ 260,000$ 0.523 Stilling BasinConventional concrete 8,400 CY 544.85$ 4,577,000$ Reinforcing Steel 185 TON 2,887.51$ 534,000$ Excavation Rock 13,000 CY 50.18$ 652,000$ 0.524 Consolidation GroutingDrill Holes 7,000 LF 11.91$ 83,000$ Cement 7,000 CF 67.81$ 475,000$ Grout Curtain0.525 Support and AnchorsDrainage TunnelSteel Support 7 TON 12,801.49$ 90,000$ Steel Mesh 1,000 SF 5.87$ 6,000$ Rockbolts Drainage Gallery3/4" @ 6' 576 EA 330.19$ 190,000$ Rockbolts Approach1" @ 15' 275 EA 741.28$ 204,000$ Rockbolts Chute and Structure1" @ 15' 112 EA 741.28$ 83,000$ Rockbolts Valve Block/Bucket1" @ 15' 46 EA 741.28$ 34,000$ Slab/Wall Anchors1" @ 10' 9,300 EA 474.06$ 4,409,000$ 0.527 DrainageDrill Holes Box Drains (To Drain Tunnel) 54,000 LF 47.95$ 2,589,000$ 3" Relief 640 LF 49.50$ 32,000$ 0.52c MechanicalGate Equipment 0 EA 4,249,280.00$ -$ Stoplog Guides 0 SETS 92,196.88$ -$ Stoplogs Includes Follower 0 SET 945,840.00$ -$ Misc Electrical 0 LS 237,000.00$ -$ 0.6 Power Intake (Inc Inlet exec and Inlet Structure Civil Works for Outlet)(same as embankment dam)0.61 Intake Structure and Approach0.611 ExcavationOverburden19,100 CY14.87$ 284,000$ 764,000 Cyd calculated Excavation Volume. Assume 25% is overburdenRock Usable573,000 CY40.27$ 23,075,000$ 764,000 Cyd calculated Excavation Volume. Assume 75% is rock exc.0.613Surface PreparationHorizontal 125,000 SF2.30$ 288,000$ Calculated 125,000 sq ftInclined151,000 SF3.33$ 503,000$ Calculated 60,300 sq ft0.614Concrete and ShotcreteStructureConcrete Structure 121,000 CY544.85$ 65,927,000$ Same as embankment, as power intake and outlet structure intake will be similarConcrete - Apron Slab3,500 CY545.85$ 1,910,000$ Same as embankment, as power intake and outlet structure intake will be similarConcrete Overbreak 12" H/6" V0 CY336.99$ -$ No Overbreak if formed integral to damReinforcing Steel7,870 TON2,887.51$ 22,725,000$ Same as embankment, as power intake and outlet structure intake will be similar0.615Supports and Anchors- 1" @ 15'400 EA735.81$ 294,000$ 0.61cMechanicalTrashracks and Guides4 SETS 1,080,960.00$ 4,324,000$ Gate Equipment4 EA1,902,720.00$ 7,611,000$ Bulkhead Gates Guides4 SETS225,200.00$ 901,000$ Bulkhead Gates inc Follower1 SET698,120.00$ 698,000$ Shutter with Guides4 SETS720,640.00$ 2,883,000$ Iceboom with Hoist4 SETS 1,238,600.00$ 4,954,000$ Iceboom Guides4 SETS563,000.00$ 2,252,000$ Intake Service Crane1 EA693,700.00$ 694,000$ Bubbler System1 LS948,000.00$ 948,000$ Misc Electrical1 LS237,000.00$ 237,000$ 0.61dIntake Building1 LS237,000.00$ 237,000$ 0.7Surge Chamber0.71Surge Chamber0.711ExcavationChamber Rock 0 CY90.12$ -$ Vent Shaft Rock0 CY601.04$ -$ 0.713Surface Preparation0 SF2.30$ -$ 0.714Concrete and ShotcreteConcrete0 CY513.35$ -$ Concrete Overbreak0 CY440.92$ -$ Reinforcing Steel0 TON2,858.29$ -$ 4" Shotcrete0 SF10.13$ -$ Page 43 of 61
Page 44 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Vent Shaft2" Shotcrete 0 SF 5.26$ -$ 0.715 Supports and AnchorsRockbolts 1" @25' HY 0 EA 1,234.86$ -$ Rockbolts 1" @ 15' 0 EA 735.81$ -$ Steel Mesh 0 SF 5.81$ -$ Steel Support 0 TON 12,671.94$ -$ Vent ShaftRock bolts 3/4" @ 6' 0 EA 327.15$ -$ Steel Mesh 0 SF 6.30$ -$ 0.717 Drainage Holes (In Chamber) 0 LF 47.95$ -$ 0.71c MechanicalStoplog Guides 0 SETS 709,380.00$ -$ Stoplog Includes Follower 0 SET 3,558,160.00$ -$ 0.8 Penstocks0.81 Penstocks0.811 ExcavationTunnelsRock Horizontal 116,946 CY 144.77$ 16,930,000$ Increase by ratio of penstock length (2350/1075) = 2.19Rock Inclined 54,000 CY 286.15$ 15,452,000$ 0.813 Surface Preparation/GroutingIncrease by ratio of penstock length (2350/1075) = 2.19Surface PreparationIncrease by ratio of penstock length (2350/1075) = 2.19Tunnels 827,820 SF 3.33$ 2,757,000$ Increase by ratio of penstock length (2350/1075) = 2.19Contact Grouting Increase by ratio of penstock length (2350/1075) = 2.19Contact Grouting 1 LS 1,258,336.33$ 1,258,000$ Increase by ratio of penstock length (2350/1075) = 2.19Consolidation GroutingIncrease by ratio of penstock length (2350/1075) = 2.19Consolidation Grouting 1 LS 1,746,016.92$ 1,746,000$ Increase by ratio of penstock length (2350/1075) = 2.190.814 Concrete and ShotcreteIncrease by ratio of penstock length (2350/1075) = 2.19Concrete Liner 81,468 CY 970.01$ 79,025,000$ Increase by ratio of penstock length (2350/1075) = 2.19Concrete Overbreak 6" 23,214 CY 692.87$ 16,084,000$ Increase by ratio of penstock length (2350/1075) = 2.19Reinforcing Steel 59 TON 2,858.29$ 169,000$ Increase by ratio of penstock length (2350/1075) = 2.193" Shotcrete 74,460 SF 7.69$ 573,000$ Increase by ratio of penstock length (2350/1075) = 2.192" Shotcrete 45,552 SF 5.26$ 240,000$ Increase by ratio of penstock length (2350/1075) = 2.190.815 Support and AnchorsIncrease by ratio of penstock length (2350/1075) = 2.19Rockbolts 1" @ 25' 329 EA 1,234.86$ 406,000$ Increase by ratio of penstock length (2350/1075) = 2.19Rockbolts 1" @ 6' 9,198 EA 327.15$ 3,009,000$ Increase by ratio of penstock length (2350/1075) = 2.19Steel Mesh 422,670 SF 6.37$ 2,692,000$ Increase by ratio of penstock length (2350/1075) = 2.190.818 Structural Misc Steelwork 5,256 TON 9,673.24$ 50,843,000$ Increase by ratio of penstock length (2350/1075) = 2.190.9 Tailrace Works (1 Portal with Combined Tailrace/Diversion Tunnel0.91 Tailrace Tunnels/Portals 0.911 ExcavationTunnelsRock 0 CY 103.00$ -$ Portals Overburden 0 CY 17.14$ -$ Rock Usable0 CY49.16$ -$ Rock Waste 0 CY 49.16$ -$ 0.913 Surface PreparationTunnelsTunnels 0 SF 3.33$ -$ Portals Horizontal 0 SF 2.30$ -$ Inclined 0 SF 3.33$ -$ 0.914 Concrete and ShotcreteTunnelsConcrete Lining 0 CY 440.92$ -$ Concrete Overbreak 6" 0 CY 314.94$ -$ 2" Shotcrete 0 SF 5.26$ -$ Reinforcing Steel 0 TON 2,887.51$ -$ Portals Concrete Base Slab 0 CY 651.93$ -$ Concrete Walls 0 CY 651.93$ -$ Concrete Overbreak 12" H/6" V 0 CY 471.65$ -$ Reinforcing Steel 0 TON 2,887.51$ -$ 0.915 Support and Anchors Tunnels Rockbolts 1" @ 12' 0 EA 528.34$ -$ Rockbolts 1" @ 9' 0 EA 432.12$ -$ Steel Support 0 TONS 12,801.49$ -$ Steel Mesh 0 SF 6.37$ -$ PortalsRockbolts 1" @ 15' 0 EA 735.81$ -$ 0.91c Mechanical Stoplog Guides 0 SET 112,600.00$ -$ Stoplogs Includes Follower 0 SET 751,200.00$ -$ 0.92 Tailrace Outlet Channel Tailrace Outlet Channel Concrete - Slab 5,569 CY 544.85$ 3,030,000$ Multiply by ratio of increased structure length (485/365) = 1.329Tailrace Outlet Channel Concrete - Training Wallls1,185 CY544.85$ 650,000$ Tailrace Reinforcing Steel553 TON2,858.29$ 1,580,000$ Used same Ratio of reinforcing steel to concrete volume for draft tubes (660/8000).1,860,300,000$ for embankment dam $ 3,202,800,000333Waterwheels, Turbines and GeneratorsPage 44 of 61
Page 45 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)0.11Turbines and Governors0.111Supply0.112Install0.2Generators and Exciters 0.21Generators and Exciters (Supply and Install)0.211Generators and Exciters0.3Total Bid From Vendor (includes all equipment in this category)4 EA74,200,000.00$ 297,000,000$ 297,000,000$ *Still only purchase (4) 150 MW UnitsAverage from acquired quotes334Accessory Electrical Equipment0.1Connections, Supports and Structures 0.11Structures0.111Structures (included Below)0.12Conductors and Insulators0.121Generator Isolated Phase Bus1 LS5,056,000.00$ 5,060,000$ 0.122HV Power Cables and Accessories1 LS2,054,000.00$ 2,050,000$ 0.123LV Power Cables and Accessories1 LS948,000.00$ 950,000$ 0.124Control Cables and Accessories1 LS1,738,000.00$ 1,740,000$ 0.125Grounding System1 LS237,000.00$ 240,000$ 0.13Conduits and Fittings0.131Conduits and Fittings1 LS632,000.00$ 630,000$ 0.2Switchgear and Control Equipment0.21Auxiliary Transformers0.211Auxiliary Transformers4 EA83,811$ 340,000$ *Assumes 2 additional systems would be purchased at time of expansion.0.22Circuit Breakers Generators-$ 0.221Circuit Breakers Generators4 EA1,504,300$ 6,020,000$ *Assumes 2 additional transformers would be purchased at time of expansion.0.23Surge Protectors and Generator Cubicles0.231Surge Protectors and Generator Cubicles1 LS726,800.00$ 730,000$ *Assumes 2 additional systems would be purchased at time of expansion.0.24Switch boards0.241Switch boards1 LS1,232,400.00$ 1,230,000$ *Assumes 2 additional systems would be purchased at time of expansion.0.25Auxiliary Power Equipment0.251Auxiliary Power Equipment1 LS347,600.00$ 350,000$ *Assumes 2 additional systems would be purchased at time of expansion.0.3Cubicles and Appurtenances0.31Control, relay and meter boards0.311Control, relay and meter boards1 LS1,422,000.00$ 1,420,000$ *Assumes 2 additional systems would be purchased at time of expansion.0.32Computer Control System0.321Computer Control System(Included in Trans-Ems)0.33Supervisor and Telemeter System0.331Supervisor and Telemeter SystemIncluded in Trans EMS)0.4Power Transformers 0.41Power Transformers 0.411Power Transformers 7 EA2,000,000$ 14,000,000$ 0.5Lighting System0.51Powerhouse and Transformer Gallery0.511Powerhouse and Transformer Gallery1 LS1,824,900.00$ 1,820,000$ 0.52Access Tunnels and Roads0.521Access Tunnels and Roads0 LS402,900.00$ -$ 0.6Misc. Electrical Equipment0.61Misc. Electrical Equipment0.611Misc. Electrical Equipment1 LS625,680.00$ 630,000$ 0.7Surface Accessory Equipment0.7134.5 kV and LV Equipment0.711Switchboard1 LS213,300$ 210,000$ 0.712Cables1 LS450,300$ 450,000$ 0.713Aux Transformers 1 LS284,400$ 280,000$ 0.73Diesel Generator- Standby 0.731Diesel Generator- Standby 2 EA347,550$ 700,000$ 0.74Exterior Lighting 0.741Exterior Lighting 1 LS355,500$ 360,000$ 0.75Mimic Board- Control Building0.751Mimic Board- Control Building1 LS1,185,000$ 1,190,000$ 40,000,000$ 335Misc Powerplant Equipment0.1Auxiliary Systems- UndergroundUsed Full Watana Data0.11Station Water SystemsUsed Full Watana Data0.111Station Water Systems 1 LS4,977,000.00$ 4,977,000$ Used Full Watana Data0.12Fire Protection SystemsUsed Full Watana Data0.121Fire Protection Systems1 LS2,844,000.00$ 2,844,000$ Used Full Watana Data0.13Compressed Air Systems Used Full Watana Data0.131Compressed Air Systems 1 LS3,555,000.00$ 3,555,000$ Used Full Watana Data0.14Oil Handling SystemsUsed Full Watana Data0.141Oil Handling Systems1 LS2,370,000.00$ 2,370,000$ Used Full Watana Data0.15Drainage & Dewatering Used Full Watana Data0.151Drainage & Dewatering 1 LS5,214,000.00$ 5,214,000$ Used Full Watana Data0.16Heating, Ventilation and Cooling SystemUsed Full Watana Data0.161Heating, Ventilation and Cooling System1 LS3,555,000.00$ 3,555,000$ Used Full Watana Data0.17MiscellaneousUsed Full Watana DataPage 45 of 61
Page 46 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)0.171Miscellaneous1 LS2,370,000.00$ 2,370,000$ Used Full Watana Data0.2Auxiliary Systems- Surface FacilitiesUsed Full Watana Data0.21Auxiliary Systems- Surface FacilitiesUsed Full Watana Data0.211Auxiliary Systems- Surface Facilities1 LS711,000.00$ 711,000$ Used Full Watana Data0.3Auxiliary EquipmentUsed Full Watana Data0.31Powerhouse Cranes Used Full Watana Data0.311Powerhouse Cranes 2 EA1,783,800.00$ 3,568,000$ Used Full Watana Data0.32Elevators Used Full Watana Data0.321Elevators 1 LS545,100.00$ 545,000$ Used Full Watana Data0.33Miscellaneous Cranes and HoistsUsed Full Watana Data0.331Miscellaneous Cranes and Hoists1 LS505,500.00$ 506,000$ Used Full Watana Data0.34Machine Shop EquipmentUsed Full Watana Data0.341Machine Shop Equipment1 LS2,022,000.00$ 2,022,000$ Used Full Watana Data0.4General Station Equipment (Included in Mechanical And Electrical Systems)Used Full Watana Data0.5Communications Equipment1 LS213,300.00$ 213,000$ Used Full Watana Data32,000,000$ 336Roads, Rails and Air Facilities 0.1Roads 0.11Pioneer Roads and Bridges 0.111Gold Creek- Watana Road (58 mi)Clearing 0 ACRE11,416.62$ -$ Waste Excavation0 CY9.51$ -$ Common Excavation0 CY8.32$ -$ 18" Culverts 0 LF62.55$ -$ 36" Culverts0 LS32,760.98$ -$ D-1 Base Material0 TON45.47$ -$ Fabric0 SY6.73$ -$ Maintenance 0 MI/YR9,008.99$ -$ 0.112Gold Creek- ParksRoad (41.25 Miles )Clearing 0 ACRE11,416.62$ -$ Waste Excavation0 CY9.51$ -$ Common Excavation0 CY8.32$ -$ 18" Culverts 0 LF62.55$ -$ 36" Culverts0 LS35,451.31$ -$ D-1 Base Material0 TON45.47$ -$ Fabric0 SY6.73$ -$ Maintenance 0 MI/YR9,008.32$ -$ 0.113Devil Canyon Low Level CrossingCrossing (7.88 Miles) Clearing 0 ACRE11,416.62$ Waste Excavation0 CY9.51$ Common Excavation0 CY8.32$ Rock Excavation0 CY28.45$ 18" Culverts 0 LF62.55$ Bridge0 LS120,000,000.00$ D-1 Base Material0 TON45.47$ Maintenance 0 MI/YR11,258.74$ 0.114Gold Creek- Watana (41.25 miles)0 LS28,132,000$ 0.12Permanent Roads and Bridges0.124 Parks Highway to Watana (62 mi)0 MI3,000,000.00$ -$ 0.125 Susitna Bridge0 SF450.00$ -$ 0.2Rail Facilities0.24Permanent Railroad (including railheads)0.244Gold Creek to Watana- RailR-1, (33 Mi)Clearing671 AC11,416.62$ 7,662,183$ Waste Excavation1687883 CY9.51$ 16,051,766$ Common Excavation3307678 CY8.32$ 27,519,880$ Rock Excavation9114 CY28.51$ 259,867$ Borrow449500 CY11.88$ 5,340,060$ Subballast711055 CY18.15$ 12,902,807$ Grade "A" Base Material6650 CY35.45$ 235,729$ D-1 Base material2400 TON43.20$ 103,680$ A.C. Surfacing2200 TON198.00$ 435,600$ Dock Lumber16 MBF1,258.60$ 20,138$ 18" Culvert20093 LF68.26$ 1,371,458$ 36" + Culverts0 LS92,160.00$ -$ Fabric12930 SY9.00$ 116,369$ Thaw Pipes41843 LF95.04$ 3,976,745$ Topsoil & Seed431 AC10,800.00$ 4,653,257$ Rail Yard Control Devices1 LS1,800.00$ 1,800$ Bridges0 SF900.00$ -$ Trackage325940 LF350.00$ 114,079,000$ MaintenanceRail406 Mile-years10,000.00$ 4,060,000$ Page 46 of 61
Page 47 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Railhead7 years75,000.00$ 525,000$ 0.13Site Roads0.131Construction RoadsSite Roads20 Mile750,000.00$ 15,000,000$ Maintenance102 MI/YRS 223,092.85$ 22,755,000$ 0.132Permanent RoadsPermanent Roads6 MILE1,287,997.42$ 7,728,000$ 0.3 Airstrip0.31AirstripPermanent Airstrip1 LS12,798,000.00$ 12,798,000$ 9 years maintenance savings 1 LSTemporary Airstrip1 LD2,133,000.00$ 2,133,000$ 0.4Saved Maintenance1 LS(5,067,889.52)$ (5,068,000)$ 254,700,000$ Transmission Plant350Land and Land Rights Land and Land RightsTransmission33 MILE 86,720.00$ 2,862,000$ Copied from Low Watana Non ExpandableSubstations (4 Sites)0 LS 2,607,000.00$ -$ Left the same as Full Watana RCC2,862,000$ 352Substation and Switching Station0.1Switchyard0.11Switchyard2 LS14,000,000.00$ 28,000,000$ Left the same as Full Watana RCC28,000,000$ 353Substation/Switching Station EquipmentEster0 LS 57,922,800.00$ -$ Willow0 LS 3,613,020.00$ -$ Knik Arm0 LS 29,838,300.00$ -$ University0 LS 88,685,400.00$ -$ Devil Canyon0 LS 35,585,550.00$ -$ Willow Energy Management System (EMS) Equipment and System Costs 0 LS 27,326,100.00$ -$ Microwave Communication Equipment 0 LS 11,660,400.00$ -$ EMS Control Center Building 0 LS 9,148,200.00$ -$ Watana and Devil Canyon In-plant Monitor and Control Equipment 0 LS 8,619,690.00$ -$ -$ 354Steel Towers and FixturesTowers (Including Foundation and Hardware)33 miles4,500,000.00$ 148,500,000$ Used same length as Transmission Land Rights148,500,000$ 356Conductors and DevicesConductors0 MILE 218,281.33$ -$ Submarine Cables0 EACH 15,808,340.56$ -$ -$ 359Roads and TrailsRoads and Trails200 MILE 75,744.00$ 15,149,000$ Left the same as Full Watana RCCClearing and Roads340 MILE 37,872.00$ 12,876,000$ Left the same as Full Watana RCC28,000,000$ 207,362,000$ General Plant389Land and Land RightsLand and Land Rights-$ 390Structures and ImprovementsStructures and Improvements-$ 391Office Furniture and EquipmentOffice Furniture and Equipment-$ 392Transportation EquipmentTransportation Equipment-$ 393Stores EquipmentStores Equipment-$ 394Tools Shop and Garage EquipmentTools Shop and Garage Equipment-$ 395Laboratory EquipmentLaboratory Equipment-$ 396Power-Operated EquipmentPage 47 of 61
Page 48 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksDescriptionLow Watana RCC (Expandable) Alternative (4 Turbines + 2 Additional Bays)Power-Operated Equipment-$ 397Communications EquipmentCommunications Equipment-$ 398Miscellaneous EquipmentMiscellaneous Equipment-$ 399Other Tangible PropertyOther Tangible Property1 LS 16,000,000$ 16,000,000$ Copied from Low Watana Non ExpandableSaved Maintence1 LS (231,220)$ (231,000)$ Copied from Low Watana Non Expandable15,800,000$ Indirect Costs61Temporary Construction FacilitiesTemporary Construction Facilities62Construction EquipmentConstruction Equipment63Main Construction Camp 0.1Main Construction Camp1 LS316,340,280$ Reduce Unit price by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)Saved Maintence1 LS(6,172,493.27)$ Site Preparation3270533Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)Buildings15019120Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)utilities12172667Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)30462320 5 152,311,600.00$ Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)MAIN CONSTRUCTION VILLAGEsite prep3540080Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)buildings10008187Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)utilities4914160Reduce Qty by ratio of Low Watana Volume to High Watana Volume = (7.6/15.0)18462426.67 5 92,312,133.33$ 152,311,600$ 123,800,000$ Camp cost to reflect lower volume ( 0.8125) *Previous Estimate doesn't total Con. Camp Co64Labor ExpenseLabor Expense(Included In Direct Costs)65SuperintendenceSuperintendence(Included In Direct Costs)66InsuranceInsurance(Included In Direct Costs)68Mitigation Fishery, Terrestrial and RecrationalMitigation(Not included in 1982 study) -$ 69FeesFeesSubtotalDirect Construction Cost3,113,300,000$ Contingency21.313%663,500,000$ Used Same Contingency as Full RCCSubtotal71AEngineering (4%), Enviornmental (2%), Regulatory(1%) and Construction Management (4%7%217,900,000$ 71BConstruction Management (4%)4%124,500,000$ 72Legal Expenses0%75Taxes0%76Administrative & Gen. Expenses0%77Interest0%80Earnings/Expenses During Construction0%Total Project Cost4,119,200,000$ r of Years for Base Case20.5 yearsrof Years for Full Watana16.5 yearsPage 48 of 61
Page 49 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / Remarks330Land and Land Rights0.1Land1 LS120,870,000.00$ 120,870,000$ 0.2Land RightsIncluded Above0.3Misc Charges in Credit AboveIncluded Above120,900,000$ 331Powerplant Structure Improvements0.1Powerhouse0.11Powerhouse and Draft Tube0.111ExcavationPowerhouse Rock914,400 CY43.72$ 39,978,000$ Powerhouse Overburden609,600 CY11.53$ 7,029,000$ Draft Tube Rock0 CY90.12$ -$ Total Total Estimat 0.113Surface Preparation/ GroutingPowerhouse108,000 SF3.33$ 360,000$ Draft Tube0 SF3.33$ -$ Grout Curtain- Drill holes47,700 LF27.63$ 1,318,000$ Grout Curtain- Cement19,000 CF81.10$ 1,541,000$ 0.114Concrete and Shot CretePowerhouse Concrete 62,356 CY544.85$ 33,970,000$ Powerhouse Concrete Overbreak0 CY447.21$ -$ Powerhouse Reinforcing Steel3,118 TON2,858.29$ 8,910,000$ Powerhouse 4" Shotcrete0 SF10.14$ -$ Draft Tube Concrete0 CY692.87$ -$ Draft Tube Concrete Overbreak0 CY447.21$ -$ Draft Tube Reinforcing Steel0 TON2,858.29$ -$ Draft Tube 2" Shotcrete0 SF5.45$ -$ 0.115Support and AnchorsPowerhouse Rockbolts 1" @ 25' Hy148 EA1,234.86$ 180,000$ Powerhouse Rockbolts 1" @ 15' 301 EA735.81$ 220,000$ Powerhouse Steel Mesh6,821 SF5.81$ 40,000$ Powerhouse Steel Support21 TON12,671.94$ 270,000$ Draft Tube Rockbolts 1" @ 25' Hy0 EA1,234.86$ -$ Draft Tube Rockbolts 1" @ 12'0 EA528.34$ -$ Draft Tube Rockbolts 1" @ 9'0 EA432.12$ -$ Draft Tube Steel Mesh0 SF6.55$ -$ 0.117Holes (U/S of Powerhouse)0 LF51.32$ -$ Holes (Powerhouse Crown)0 LF51.32$ -$ 0.118Structural- Misc Steelwork-$ Powerhouse and Draft Tube- Steel Crane Rails1 LS10,276,309.00$ 10,280,000$ 0.119Architectural- Powerhouse1 LS5,500,000.00$ 5,500,000$ y0.11cMechanical Draft Tube Gates4 SETS427,880.00$ 1,712,000$ Draft Tube Gate Guides4 SETS202,680.00$ 811,000$ Draft Tube Crane1 LS1,140,000.00$ 1,140,000$ 0.12Access Tunnels and Portals 0.121ExcavationMain Tunnel0CY97.45$ -$ Transformer Gallery Tunnel0 CY97.45$ -$ Grouting Gallery Tunnel0 CY396.04$ -$ Surge Chamber Access Tunnel0 CY145.22$ -$ Penstock Access Tunnel0 CY145.22$ -$ Penstock Elbow Access Tunnel0 CY145.22$ -$ Access Shaft Tunnel0 CY145.22$ -$ Connector Tunnel0 CY379.26$ -$ Portals Overburden0 CY17.14$ -$ Portals Rock0 CY49.31$ -$ 0.123Surface Preparation Main Tunnel Slab0 SF2.21$ -$ Penstock Access Slab0 SF2.21$ -$ Horizontal Portal 0 SF2.30$ -$ Inclined Portal0 SF3.33$ -$ 0.124Concrete and Shot CreteMain PortalConcrete Slab0 CY406.27$ -$ Concrete Walls0 CY406.27$ -$ Concrete Overbreak0 CY368.48$ -$ Reinforcing Steel0 TON2,887.51$ -$ TunnelsConcrete Slab Main Tunnel0 CY503.90$ -$ Low Watana RCC Arch Alternative (4 Turbines)Low Watana RCC (Non-Expandable) Estimate 10/28/10 used as basisModified by Hatch Associates Consultants, Inc._RST_10/28/10DescriptionHDR/AEA Susitna Hydroelectric ProjectCost Estimates for 1982 quantities- AlternativesBy: DTABy: Leanne Andruszkiewicz, EIT Date: 1/25/09Reviewed By: David Elwood, EIT Date: 1/25/09, Modified by Hatch Acres_mb_061109, R&M 11/16/09Alternatives- 2008 DollarsPage 49 of 61
Page 50 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionConcrete Plugs Penstock Elbow ACC0 CY755.86$ -$ Concrete Overbreak Main Tunnel 6"0 CY346.43$ -$ Reinforcing Steel0 TON2,887.51$ -$ 2 " Shotcrete Main Tunnel0 SF5.26$ -$ 2 " Shotcrete Transformer Gal0 SF5.26$ -$ 2 " Shotcrete Surge Chamber Acc0 SF5.26$ -$ 2 " Shotcrete Penstock Access 0 SF5.26$ -$ 2 " Shotcrete Penstock Elbow Acc0 SF5.26$ -$ 2 " Shotcrete Access Shaft0 SF5.26$ -$ 2 " Shotcrete Grout Gallery0 SF5.26$ -$ 2 " Shotcrete Connector Tunnel0 SF5.26$ -$ 0.125Support and AnchorsMain TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Main Tunnel Portal-$ Rockbolts 1" @15'0 EA735.79$ -$ Transformer Gallery Tunnel -$ Rockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF5.89$ -$ Steel Support0 TON12,801.49$ -$ Grouting Gallery Tunnel-$ Rockbolts 3/4" @ 6'0 EA327.15$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Surge Chamber Access Tunnel-$ Rockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Penstock Access TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Penstock Elbow Access TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Access Shaft TunnelRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ Connector TunnelRockbolts 3/4" @ 6'0 EA327.15$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ 0.129Architectural- Main Portal Doors0 SETS158,371.90$ -$ 0.12cMechanical Ventilation System Included in (63.81 and 63.82)0.13Access Shaft0.131Excavation Rock0 CY227.67$ -$ 0.133Surface Preparation Shaft0 SF3.33$ -$ 0.134Concrete and Shot CreteConcrete Lining0 CY944.82$ -$ Concrete Overbreak 6"0 CY551.14$ -$ 0.135Support and Anchors - Rockbolts 3/4" @ 6'0 EA327.15$ -$ 0.138Structural Misc Steelwork0 TON7,395.00$ -$ 0.139Architectural- control Building 0.13cMechanical Elevators0 LS2,368,815.00$ -$ 0.14Fire Protection Head Tank0.141Excavation0 CY43.72$ -$ 0.143Surface Preparation0 SF2.30$ -$ 0.144Concrete & ShotcreteConcrete 208 CY963.72$ 200,000$ Concrete Overbreak 6"0 CY406.27$ -$ Reinforcing Steel8 TON2,858.29$ 20,000$ 0.145Support and AnchorsRockbolts 1" @12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.30$ -$ Steel Support0 TON12,671.95$ -$ 0.148Misc Steelwork1LS73,297.50$ 70,000$ Page 50 of 61
Page 51 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)Description0.14cMechanical Piping/Valves 0.15Bus Tunnels (totals for 3 Bus Tunnels)0.151ExcavationRock Horizontal0 CY213.70$ -$ Rock Inclined0 CY601.04$ -$ 0.153Surface Preparation- Tunnels0 SF3.33$ -$ 0.154Concrete and ShotcreteConcrete Slab0 CY818.84$ -$ Concrete Overbreak 12"0 CY472.41$ -$ Reinforcing Steel0 TON2,858.29$ -$ 2" Shotcrete0 SF5.26$ -$ 0.155Supports and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ Rockbolts 1" @ 12'0 EA528.34$ -$ Rockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.30$ -$ Steel Support0 TON12,671.94$ -$ 0.16Transformer Gallery Tunnel0.161Excavation- Rock 0 CY87.44$ -$ 0.163Surface Preparation0 SF2.30$ -$ 0.164Concrete and ShotcreteConcrete Base Slab0 CY544.85$ -$ Concrete Overbreak 12"H/6"V0 CY377.93$ -$ Reinforcing Steel0 TON2,858.29$ -$ 0.165Support and AnchorsRockbolts 1" @ 25' 0 EA1,234.86$ -$ Rockbolts 1" @ 15'0 EA735.81$ -$ Steel Mesh0 SF5.81$ -$ Steel Support0 TON12,671.94$ -$ 0.167Drainage Holes 0 LF47.95$ -$ 0.17Cable Shafts 0.171Excavation Rock0 CY601.04$ -$ 0.173Surface Preparation Shafts0 SF3.33$ -$ 0.174Concrete and ShotcreteConcrete Lining0 CY1,763.66$ -$ Concrete Overbreak 6"0 CY881.83$ -$ 0.175Supports and Anchors- Rockbolts 3/4" @ 6'0 EA327.15$ -$ 0.178Structural Steel Support Towers12 TON15,602.00$ 190,000$ 0.179Architectural- Enclosures0 LS199,317.00$ -$ 0.17cMechanical Hoist0 EA476,960.00$ -$ 0.18Dewatering (during Construction)0.181Dewatering (Power Facilities)1 LS1,336,798.50$ 1,340,000$ 0.19Instrumentation0.191Instrumentation1 LS1,714,813.50$ 1,710,000$ 0.2Misc Buildings (Control Buildings)1 LS4,433,085.00$ 4,430,000$ 0.3Permanent Town(included in 63.5)121,219,000$ 332Reservoir, Dams and Waterways0.1Reservoir0.11Reservoir Clearing23,000 ACRE3,005.85$ 69,135,000$ 0.2Diversion Schemes /Cofferdams0.21Diversion Tunnels /Portals-$ 0.211Excavation-$ Combined Tunnels-$ Rock171,580 CY92.33$ 15,840,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Combined Upstream Portals-$ Rock35,000 CY49.16$ 1,720,000$ Combined Downstream Portals-$ Rock Usable75,000 CY49.16$ 3,690,000$ Emergency Release Chambers-$ Excavate Concrete for Plugs1,139 CY101.98$ 120,000$ Gate Chamber 2,975 CY110.73$ 330,000$ Access Tunnel to Gate Chamber-$ Rock0 CY97.15$ -$ 0.212Fill- Temp for Coffer Dam to Construct Upstream Portals23,000 CY11.66$ 270,000$ 0.213Surface Preparation \ grouting-$ Upstream Upper Portal -$ Horizontal 3,200 SF2.30$ 10,000$ Inclined8,600 SF3.33$ 30,000$ Upstream Lower Portal -$ Horizontal 1,300 SF2.30$ -$ Inclined14,900 SF3.33$ 50,000$ Downstream Upper Portal-$ Horizontal 6,100 SF2.30$ 10,000$ Inclined20,500 SF3.33$ 70,000$ Downstream Lower Portal-$ Horizontal 600 SF2.30$ -$ Inclined5,600 SF3.33$ 20,000$ Page 51 of 61
Page 52 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionGrout Upper Tunnel Plugs -$ Drill Holes 4,100 LF 26.76$ 110,000$ Cement 820 CF 81.10$ 70,000$ Grout Lower Tunnel Permanent Plugs-$ Drill Holes 2,050 LF 26.76$ 50,000$ Cement 410 CF 81.10$ 30,000$ 0.214 Concrete and Shotcrete-$ Combined Tunnels-$ Concrete Lining 31,280 CY 566.89$ 17,730,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Concrete Lining Overbreak 6" 13,800 CY 314.94$ 4,350,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Reinforcing Steel 19 TON 2,887.51$ 60,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Concrete Lining for Plug 6,200 CY 428.32$ 2,660,000$ 2" Shotcrete 44,620 SF 5.26$ 230,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Upstream Upper Portal-$ Concrete Headwall 3,200 CY 651.93$ 2,090,000$ Concrete Lining 1,300 CY 651.93$ 850,000$ Concrete Slab 750 CY 651.93$ 490,000$ Concrete Piers 800 CY 651.93$ 520,000$ Concrete Overbreak 12" H/6"V 300 CY 472.41$ 140,000$ Reinforcing Steel 400 TON 2,887.51$ 1,160,000$ Upstream Lower Portal -$ Concrete Headwall 4,500 CY 651.93$ 2,930,000$ Concrete Lining 3,000 CY 651.93$ 1,960,000$ Concrete Slab 300 CY 651.93$ 200,000$ Concrete Piers 700 CY 651.93$ 460,000$ Concrete Overbreak 12" H/6"V 350 CY 472.41$ 170,000$ Reinforcing Steel 600 TON 2,887.51$ 1,730,000$ Downstream Upper Portal-$ Concrete Headwall 500 CY 651.93$ 330,000$ Concrete Slab 100 CY 651.93$ 70,000$ Concrete Overbreak 12" H/6"V 100 CY 472.41$ 50,000$ Reinforcing Steel 40 TON 2,887.51$ 120,000$ Downstream Lower Portal-$ Concrete Headwall 2,500 CY 651.93$ 1,630,000$ Concrete Slab 100CY651.93$ 70,000$ Concrete Overbreak 12" H/6"V150 CY472.41$ 70,000$ Reinforcing Steel 170 TON2,887.51$ 490,000$ Downstream Flip Bucket-$ Concrete Slab 0 CY651.93$ -$ Concrete Walls0 CY651.93$ -$ Concrete Invert0 CY651.93$ -$ Concrete Overbreak 12" H/6"V0 CY42.41$ -$ Reinforcing Steel 0 TON2,887.51$ -$ Downstream Retaining Wall-$ Concrete Slab 200 CY651.93$ 130,000$ Concrete Walls2,000 CY651.93$ 1,300,000$ Concrete Overbreak 12" H/6"V110 CY472.41$ 50,000$ Reinforcing Steel 90 TON2,887.51$ 260,000$ Emergency Release Chambers-$ Concrete Plug5,500 CY755.86$ 4,160,000$ 4" Shotcrete 1,000 SF10.13$ 10,000$ Access Tunnel to Gate Chamber-$ 2" Shotcrete 0 SF5.26$ -$ 0.215Supports and Anchors-$ Combined Tunnels-$ Rockbolts 1" @ 12'2,852 EA528.34$ 1,510,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Rockbolts 1" @ 9'488 EA432.12$ 210,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Steel Mesh171,120 SF6.37$ 1,090,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Steel Support175 TON12,801.49$ 2,240,000$ Multiplied Non Expandable Qty by ratio of length Decrease (3,770 / 4,100) = 0.92Upstream Lower Portal-$ Rockbolts 1" @ 15'240 EA735.81$ 180,000$ Anchors 1" @ 25'290 EA1,234.86$ 360,000$ Upstream Upper Portal -$ Rockbolts 1" @ 15'-$ Anchors 1" @ 25'130 EA735.81$ 100,000$ Downstream Lower Portal-$ Rockbolts 1" @ 15'200 EA735.81$ 150,000$ Downstream Upper Portal-$ Rockbolts 1" @ 15'100 EA735.81$ 70,000$ Retaining Wall Anchors 1" @25'100 EA1,234.86$ 120,000$ Emergency Release Chambers-$ Rockbolts 1" @ 25'63 EA1,234.86$ 80,000$ Rockbolts 1" @ 15'79 EA735.77$ 60,000$ Steel Mesh2,279 SF6.37$ 10,000$ Steel Support9 TON12,801.49$ 110,000$ Metal to Roof Anchors 3/4" @ 6'13 EA342.42$ -$ Access Tunnel to Gate Chamber-$ Rockbolts 1" @ 12'0 EA528.34$ -$ Page 52 of 61
Page 53 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionRockbolts 1" @ 9'0 EA432.12$ -$ Steel Mesh0 SF6.37$ -$ Steel Support0 TON12,801.49$ -$ 0.218Structural- Misc Steelwork2,775 SF93.61$ 260,000$ 0.21cMechanical-$ Upstream Lower Gates-$ Gate Equipment2 EA5,073,120.00$ 10,150,000$ Upstream Upper Gates-$ Gate Equipment2 EA2,840,080.00$ 5,680,000$ Trashracks1 LS1,777,500.00$ 1,780,000$ Downstream Lower Outlet -$ Stoplog Guides 1 LS142,200.00$ 140,000$ Stoplogs includes follower1 LS1,967,100.00$ 1,970,000$ Downstream Upper Outlet -$ Stoplog Guides 1 LS82,950.00$ 80,000$ Low Level Release-$ Slide Gates Include Steel Liner9 EA3,517,470.00$ 31,660,000$ 0.22Upstream Cofferdam 0.221CofferdamRCC978,000 CY100.00$ 0.222Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 0.223 Cutoff Slurry Wall excavation5,100 CY4.88$ 25,000$ slurry wall46,000 SF72.44$ 3,332,000$ 0.22dDewatering Initial Dewatering 1 LS5,807,685.00$ 5,808,000$ Dewatering Maintenance1 LS22,377,990.00$ 22,378,000$ 0.23Down Stream Cofferdam0.231 Cofferdam RCC261,300 CY100.00$ 0.232Pre-cofferdamRock Fill23,400 CY10.90$ 255,000$ 0.233 Cutoff Slurry Wall Excavation 5,100 CY4.60$ 23,000$ Slurry Wall46,000 SF72.44$ 3,332,000$ 0.3Main Dam0.31Main Dam0.311ExcavationOverburden above el. 1470257,167 CY11.53$ 2,965,000$ Overburden below el. 1470675,285 CY11.06$ 7,469,000$ Rock Usable above el. 1470163,617 CY43.03$ 7,040,000$ Rock Usable below el. 147060,674 CY43.72$ 2,653,000$ Rock Waste above el. 1470247,520CY43.03$ 10,651,000$ Rock Waste below el. 1470110,368 CY50.18$ 5,538,000$ 0.312DamRCC6,000,000 CY100.00$ 600,000,000$ End Area CalculationsBase RCC0 CY100.00$ -$ 0.313Surface Prep/ GroutingSurface PreparationUnder Core/Filters above el. 1500637,840 SF3.11$ 1,984,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Under Core/Filters below el. 1500429,100 SF3.11$ 1,335,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope) Under Shell above el. 15001,974,829 SF2.15$ 4,246,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Under Shell below el. 1500983,987 SF2.15$ 2,116,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Consolidation GroutReduce Low Watana Non Expandable by 0.7 (Downstream Slope)Drill Holes 133,280 LF11.91$ 1,587,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Cement133,280 CF67.81$ 9,038,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Grout CurtainReduce Low Watana Non Expandable by 0.7 (Downstream Slope)Drill Holes 177,072 LF26.76$ 4,738,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Cement70,829 CF81.10$ 5,744,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Dental ConcreteReduce Low Watana Non Expandable by 0.7 (Downstream Slope)Dental Concrete59,500 CY365.33$ 21,737,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)0.317DrainageReduce Low Watana Non Expandable by 0.7 (Downstream Slope)Holes51,789 LF51.32$ 2,658,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)0.318BridgePrecast Bridge Beams25,500 CY544.85$ 13,894,000$ Concrete Road Deck5,400 CY544.85$ 2,942,000$ Piers500 CY544.85$ 272,000$ 0.32Grout Galleries/Portals 0.321Excavation-$ Tunnels/ Shafts- Core Area-$ Rock Horizontal0 CY394.80$ -$ Rock Inclined0 CY552.93$ -$ Rock Vertical0 CY536.19$ -$ Tunnels/ Shafts- Access -$ Rock Horizontal1,300 CY394.80$ 510,000$ Reduce Low Watana Non Expandable by 0.7 (Downstream Slope)Page 53 of 61
Page 54 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionRock Inclined200 CY552.93$ 110,000$ Portals -$ Overburden Rock2,900 CY17.16$ 50,000$ Rock800 CY49.16$ 40,000$ 0.323Surface Preparation-$ Portals -$ Horizontal 24 SF2.30$ -$ Inclined160 SF3.33$ -$ -$ 0.324Concrete and Shotcrete-$ Tunnels- Core Area-$ Concrete Plugs267 CY428.32$ 110,000$ Concrete Slab600 CY944.82$ 570,000$ Concrete Overbreak 6"0 CY755.86$ -$ Reinforcing Steel21 TON2,887.51$ 60,000$ 2" Shotcrete0 SF5.26$ -$ Tunnels-Access-$ Concrete Slab160 CY944.82$ 150,000$ Concrete Overbreak 6"80 CY755.86$ 60,000$ Reinforcing Steel6 TON2,887.51$ 20,000$ 2" Shotcrete538 SF5.26$ -$ Shafts-$ 2" Shotcrete4,000 SF5.26$ 20,000$ Portals -$ Concrete16 CY406.36$ 10,000$ Reinforcing Steel2 TON2,887.51$ -$ 0.325Support and Anchors-$ Tunnels- Core Area-$ Rockbolts 3/4" @6'0 EA327.15$ -$ Steel Mesh0 SF5.37$ -$ Steel Support0 TON12,801.49$ -$ Tunnels- Access-$ Rockbolts 3/4" @6'120 EA327.15$ 40,000$ Steel Mesh110 SF5.37$ -$ Steel Support2 TON12,801.49$ 30,000$ Shafts -$ Rockbolts 3/4" @6'280 EA327.15$ 90,000$ Steel Mesh800 SF5.37$ -$ Portals -$ Rockbolts 1" @15'24 EA735.81$ 20,000$ 0.329Architectural Portal Doors-$ Portal Doors1 LS33,900.00$ 30,000$ 0.33Instrumentation -$ 0.331Instrumentation1 LS8,657,610.00$ 8,660,000$ 0.4Relict Channel-$ 0.41Shore Protection -$ 0.411Excavation -$ Overburden Stripping 2' thick2,200 CY11.56$ 30,000$ 0.412Fill -$ Dump and Spread-$ Filter Material - 2' layer2,200 CY31.93$ 70,000$ Rock Spalls/ Rip Rap- 3' Ave3,300 CY9.86$ 30,000$ Shore Protection -$ Rip Rap24,000 CY24.26$ 580,000$ Waste Rock24,000 CY22.78$ 550,000$ 0.44Channel Filter Blanket-$ 0.442Fill-$ Coarse Filter 2,900,000 CY33.85$ 98,170,000$ Fine Filter 2,180,000 CY43.65$ 95,160,000$ Rip Rap182,000 CY24.26$ 4,420,000$ 0.443Surface preparation-$ Foundation Prep -$ Clearing and Grubbing 460 ACRE3,963.11$ 1,820,000$ Excavation2,236,000 CY15.62$ 34,930,000$ 0.5Outlet Facilities 0.51Outlet Facilities- (Intake Civil Work Include in Power Intake )0.511ExcavationInlet (Included in 332.611)Outlet (Included in 332.521)Tunnels Rock Horizontal0 CY103.00$ -$ Rock Inclined 0 CY183.49$ -$ 0.513Surface Preparation/ Grouting Inlet (Included in 332.613)Outlet (Included in 332.523)Tunnels0SF2.30$ -$ Contact Grouting0 LS569,428.05$ -$ 0.514Concrete and Shotcrete Page 54 of 61
Page 55 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionInlet (Included in 332.614)Outlet (Included in 332.524)Tunnels Concrete Lining 0 CY 944.82$ -$ Concrete Overbreak 6" 0 CY 440.92$ -$ 2" Shotcrete 0 SF 5.26$ -$ 3" Shotcrete 0 SF 7.69$ -$ 0.515 Support and AnchorsInlet (Included in 332.615)Outlet (Included in 332.525)Tunnels Rock Bolts 1" @6' 0 EA 327.15$ -$ Steel Mesh 0 SF 6.37$ -$ 0.516 Mechanical - Low Level OutletInlet Trash Racks/Guides 1 LS 1,540,500.00$ 1,541,000$ Gate Equipment 2 EA 3,317,040.00$ 6,634,000$ Stoplog Guides 2 SETS 213,940.00$ 428,000$ OutletFixed Cone Valves 6 +1 Spare 1 LS 4,500,630.00$ 4,501,000$ Ring Follower Gates 6 EA 1,936,494.80$ 11,619,000$ Steel Manifold Liner 960 TON 8,952.53$ 8,594,000$ Req'd steel liner quantity approx 873 tons, added 10% to get 960 tonsMisc Mechanical Equipment 1 LS 948,000.00$ 948,000$ Misc Electrical Systems 1 LS 237,000.00$ 237,000$ 0.52 Main (Chute ) Spillway (Includes Civil Works for Outlet Facilities)0.522 Stepped SpillwayConventional Concrete - Steps 47,724 CY 544.85$ 26,002,000$ Reduced by ratio of spillway length, (671 / 778 ) = 0.863Reinforcing Steel - Steps 1,156 TON 2,887.51$ 3,339,000$ Reduced by ratio of spillway length, (671 / 778 ) = 0.864Conventional Concrete - Training Walls 3,107 CY 544.85$ 1,693,000$ Reduced by ratio of spillway length, (671 / 778 ) = 0.865Reinforcing Steel - Training Walls 78 TON 2,887.51$ 224,000$ Reduced by ratio of spillway length, (671 / 778 ) = 0.8660.523 Stilling BasinConventional concrete 8,400 CY 544.85$ 4,577,000$ Reinforcing Steel 185 TON 2,887.51$ 534,000$ Excavation Rock 13,000 CY 50.18$ 652,000$ 0.524 Consolidation GroutingDrill Holes 7,000 LF 11.91$ 83,000$ Cement 7,000 CF 67.81$ 475,000$ Grout Curtain0.525 Support and AnchorsDrainage TunnelSteel Support 7 TON 12,801.49$ 90,000$ Steel Mesh 1,000 SF 5.87$ 6,000$ Rockbolts Drainage Gallery3/4" @ 6' 576 EA 330.19$ 190,000$ Rockbolts Approach1" @ 15' 275 EA 741.28$ 204,000$ Rockbolts Chute and Structure1" @ 15' 112 EA 741.28$ 83,000$ Rockbolts Valve Block/Bucket1" @ 15'46EA741.28$ 34,000$ Slab/Wall Anchors1" @ 10'9,300 EA474.06$ 4,409,000$ 0.527DrainageDrill Holes Box Drains (To Drain Tunnel)54,000 LF47.95$ 2,589,000$ 3" Relief640 LF49.50$ 32,000$ 0.52cMechanicalGate Equipment0 EA4,249,280.00$ -$ Stoplog Guides 0 SETS92,196.88$ -$ Stoplogs Includes Follower0 SET945,840.00$ -$ Misc Electrical0 LS237,000.00$ -$ 0.6Power Intake (Inc Inlet exec and Inlet Structure Civil Works for Outlet)0.61Intake Structure and Approach0.611ExcavationOverburden68,000 CY14.87$ 1,011,000$ Rock Usable204,000 CY40.27$ 8,215,000$ 0.613Surface PreparationHorizontal 112,500 SF2.30$ 259,000$ Inclined60,300 SF3.33$ 201,000$ 0.614Concrete and ShotcreteStructureConcrete Structure 121,000 CY544.85$ 65,927,000$ Concrete - Apron Slab3,500 CY545.85$ 1,910,000$ Concrete Overbreak 12" H/6" V0 CY336.99$ -$ Reinforcing Steel7,870 TON2,887.51$ 22,725,000$ 0.615Supports and Anchors- 1" @ 15'400 EA735.81$ 294,000$ 0.61cMechanicalTrashracks and Guides4 SETS 1,080,960.00$ 4,324,000$ Page 55 of 61
Page 56 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionGate Equipment4 EA1,902,720.00$ 7,611,000$ Bulkhead Gates Guides4 SETS225,200.00$ 901,000$ Bulkhead Gates inc Follower1 SET698,120.00$ 698,000$ Shutter with Guides4 SETS720,640.00$ 2,883,000$ Iceboom with Hoist4 SETS 1,238,600.00$ 4,954,000$ Iceboom Guides4 SETS563,000.00$ 2,252,000$ Intake Service Crane1 EA693,700.00$ 694,000$ Bubbler System1 LS948,000.00$ 948,000$ Misc Electrical1 LS237,000.00$ 237,000$ 0.61dIntake Building1 LS237,000.00$ 237,000$ 0.7Surge Chamber0.71Surge Chamber0.711ExcavationChamber Rock 0 CY90.12$ -$ Vent Shaft Rock0 CY601.04$ -$ 0.713Surface Preparation0 SF2.30$ -$ 0.714Concrete and ShotcreteConcrete0 CY513.35$ -$ Concrete Overbreak0 CY440.92$ -$ Reinforcing Steel0 TON2,858.29$ -$ 4" Shotcrete0 SF10.13$ -$ Vent Shaft2" Shotcrete0 SF5.26$ -$ 0.715Supports and AnchorsRockbolts 1" @25' HY0 EA1,234.86$ -$ Rockbolts 1" @ 15'0 EA735.81$ -$ Steel Mesh0 SF5.81$ -$ Steel Support0 TON12,671.94$ -$ Vent ShaftRock bolts 3/4" @ 6'0 EA327.15$ -$ Steel Mesh0 SF6.30$ -$ 0.717Drainage Holes (In Chamber)0 LF47.95$ -$ 0.71cMechanicalStoplog Guides 0 SETS 709,380.00$ -$ Stoplog Includes Follower0 SET3,558,160.00$ -$ 0.8Penstocks0.81Penstocks0.811ExcavationTunnelsRock Horizontal 34,283 CY144.77$ 4,963,000$ Decrease by ratio of total penstock length (690/1075)Rock Inclined54,000 CY286.15$ 15,452,000$ 0.813Surface Preparation/GroutingDecrease by ratio of total penstock length (690/1075)Surface PreparationDecrease by ratio of total penstock length (690/1075)Tunnels242,676SF3.33$ 808,000$ Decrease by ratio of total penstock length (690/1075)Contact Grouting Decrease by ratio of total penstock length (690/1075)Contact Grouting1 LS368,882.16$ 369,000$ Decrease by ratio of total penstock length (690/1075)Consolidation GroutingDecrease by ratio of total penstock length (690/1075)Consolidation Grouting1 LS511,846.06$ 512,000$ Decrease by ratio of total penstock length (690/1075)0.814Concrete and ShotcreteDecrease by ratio of total penstock length (690/1075)Concrete Liner23,882 CY970.01$ 23,166,000$ Decrease by ratio of total penstock length (690/1075)Concrete Overbreak 6"6,805 CY692.87$ 4,715,000$ Decrease by ratio of total penstock length (690/1075)Reinforcing Steel 17 TON2,858.29$ 50,000$ Decrease by ratio of total penstock length (690/1075)3" Shotcrete21,828 SF7.69$ 168,000$ Decrease by ratio of total penstock length (690/1075)2" Shotcrete13,354 SF5.26$ 70,000$ Decrease by ratio of total penstock length (690/1075)0.815Support and AnchorsDecrease by ratio of total penstock length (690/1075)Rockbolts 1" @ 25'96 EA1,234.86$ 119,000$ Decrease by ratio of total penstock length (690/1075)Rockbolts 1" @ 6'2,696 EA327.15$ 882,000$ Decrease by ratio of total penstock length (690/1075)Steel Mesh123,906 SF6.37$ 789,000$ Decrease by ratio of total penstock length (690/1075)0.818Structural Misc Steelwork1,541 TON9,673.24$ 14,905,000$ Decrease by ratio of total penstock length (690/1075)0.9Tailrace Works (1 Portal with Combined Tailrace/Diversion Tunnel0.91Tailrace Tunnels/Portals 0.911ExcavationTunnelsRock0 CY103.00$ -$ Portals Overburden0 CY17.14$ -$ Rock Usable0 CY49.16$ -$ Rock Waste0 CY49.16$ -$ 0.913Surface PreparationTunnelsTunnels0 SF3.33$ -$ Portals Horizontal 0 SF2.30$ -$ Inclined0 SF3.33$ -$ 0.914Concrete and ShotcreteTunnelsConcrete Lining0 CY440.92$ -$ Concrete Overbreak 6"0 CY314.94$ -$ Page 56 of 61
Page 57 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)Description2" Shotcrete0 SF5.26$ -$ Reinforcing Steel0 TON2,887.51$ -$ Portals Concrete Base Slab0 CY651.93$ -$ Concrete Walls0 CY651.93$ -$ Concrete Overbreak 12" H/6" V0 CY471.65$ -$ Reinforcing Steel0 TON2,887.51$ -$ 0.915Support and Anchors Tunnels Rockbolts 1" @ 12'0 EA528.34$ -$ Rockbolts 1" @ 9' 0 EA432.12$ -$ Steel Support 0 TONS12,801.49$ -$ Steel Mesh0 SF6.37$ -$ PortalsRockbolts 1" @ 15'0 EA735.81$ -$ 0.91cMechanical Stoplog Guides 0 SET112,600.00$ -$ Stoplogs Includes Follower0 SET751,200.00$ -$ 0.92Tailrace Outlet Channel Tailrace Outlet Channel Concrete - Slab4,190 CY544.85$ 2,280,000$ Tailrace Outlet Channel Concrete - Training Wallls1,185 CY544.85$ 650,000$ Tailrace Reinforcing Steel440 TON2,858.29$ 1,260,000$ 1,463,500,000$ for embankment dam $ 3,202,800,000333Waterwheels, Turbines and Generators0.11Turbines and Governors0.111Supply0.112Install0.2Generators and Exciters 0.21Generators and Exciters (Supply and Install)0.211Generators and Exciters0.3Total Bid From Vendor (includes all equipment in this category)4 EA74,200,000.00$ 297,000,000$ 297,000,000$ Average from acquired quotes334Accessory Electrical Equipment0.1Connections, Supports and Structures 0.11Structures0.111Structures (included Below)0.12Conductors and Insulators0.121Generator Isolated Phase Bus1 LS5,056,000.00$ 5,060,000$ 0.122HV Power Cables and Accessories1 LS2,054,000.00$ 2,050,000$ 0.123LV Power Cables and Accessories1 LS948,000.00$ 950,000$ 0.124Control Cables and Accessories1 LS1,738,000.00$ 1,740,000$ 0.125Grounding System1 LS237,000.00$ 240,000$ 0.13Conduits and Fittings0.131Conduits and Fittings1 LS632,000.00$ 630,000$ 0.2Switchgear and Control Equipment0.21Auxiliary Transformers0.211Auxiliary Transformers4 EA83,811$ 340,000$ 0.22Circuit Breakers Generators-$ 0.221Circuit Breakers Generators4 EA1,504,300$ 6,020,000$ 0.23Surge Protectors and Generator Cubicles0.231Surge Protectors and Generator Cubicles1 LS726,800.00$ 730,000$ 0.24Switch boards0.241Switch boards1 LS1,232,400.00$ 1,230,000$ 0.25Auxiliary Power Equipment0.251Auxiliary Power Equipment1 LS347,600.00$ 350,000$ 0.3Cubicles and Appurtenances0.31Control, relay and meter boards0.311Control, relay and meter boards1 LS1,422,000.00$ 1,420,000$ 0.32Computer Control System0.321Computer Control System(Included in Trans-Ems)0.33Supervisor and Telemeter System0.331Supervisor and Telemeter SystemIncluded in Trans EMS)0.4Power Transformers 0.41Power Transformers 0.411Power Transformers 7 EA2,000,000$ 14,000,000$ 0.5Lighting System0.51Powerhouse and Transformer Gallery0.511Powerhouse and Transformer Gallery1 LS1,824,900.00$ 1,820,000$ 0.52Access Tunnels and Roads0.521Access Tunnels and Roads0 LS402,900.00$ -$ 0.6Misc. Electrical Equipment0.61Misc. Electrical Equipment0.611Misc. Electrical Equipment1 LS625,680.00$ 630,000$ Page 57 of 61
Page 58 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)Description0.7Surface Accessory Equipment0.7134.5 kV and LV Equipment0.711Switchboard1 LS213,300$ 210,000$ 0.712Cables1 LS450,300$ 450,000$ 0.713Aux Transformers 1 LS284,400$ 280,000$ 0.73Diesel Generator- Standby 0.731Diesel Generator- Standby 2 EA347,550$ 700,000$ 0.74Exterior Lighting 0.741Exterior Lighting 1 LS355,500$ 360,000$ 0.75Mimic Board- Control Building0.751Mimic Board- Control Building1 LS1,185,000$ 1,190,000$ 40,000,000$ 335Misc Powerplant Equipment0.1Auxiliary Systems- Underground0.11Station Water Systems0.111Station Water Systems 1 LS2,488,500.00$ 2,490,000$ 0.12Fire Protection Systems0.121Fire Protection Systems1 LS1,422,000.00$ 1,420,000$ 0.13Compressed Air Systems 0.131Compressed Air Systems 1 LS1,777,500.00$ 1,780,000$ 0.14Oil Handling Systems0.141Oil Handling Systems1 LS1,185,000.00$ 1,190,000$ 0.15Drainage & Dewatering 0.151Drainage & Dewatering 2 EA1,738,000$ 3,480,000$ 0.16Heating, Ventilation and Cooling System0.161Heating, Ventilation and Cooling System1 LS1,777,500.00$ 1,780,000$ 0.17Miscellaneous0.171Miscellaneous1 LS1,185,000.00$ 1,190,000$ 0.2Auxiliary Systems- Surface Facilities0.21Auxiliary Systems- Surface Facilities0.211Auxiliary Systems- Surface Facilities1 LS711,000$ 710,000$ 0.3Auxiliary Equipment0.31Powerhouse Cranes 0.311Powerhouse Cranes 2 EA1,800,000$ 3,600,000$ 0.32Elevators 0.321Elevators 2 EA181,700$ 360,000$ 0.33Miscellaneous Cranes and Hoists0.331Miscellaneous Cranes and Hoists1 LS505,500$ 510,000$ 0.34Machine Shop Equipment0.341Machine Shop Equipment1 LS2,022,000$ 2,020,000$ 0.4General Station Equipment (Included in Mechanical And Electrical Systems)0.5Communications Equipment1 LS106,650.00$ 110,000$ 21,000,000$ 336Roads, Rails and Air Facilities 0.1Roads 0.11Pioneer Roads and Bridges 0.111Gold Creek- Watana Road (58 mi)Clearing 0 ACRE11,416.62$ -$ Waste Excavation0 CY9.51$ -$ Common Excavation0 CY8.32$ -$ 18" Culverts 0 LF62.55$ -$ 36" Culverts0 LS32,760.98$ -$ D-1 Base Material0 TON45.47$ -$ Fabric0 SY6.73$ -$ Maintenance 0 MI/YR9,008.99$ -$ 0.112Gold Creek- ParksRoad (41.25 Miles )Clearing 0 ACRE11,416.62$ -$ Waste Excavation0 CY9.51$ -$ Common Excavation0 CY8.32$ -$ 18" Culverts 0 LF62.55$ -$ 36" Culverts0 LS35,451.31$ -$ D-1 Base Material0 TON45.47$ -$ Fabric0 SY6.73$ -$ Maintenance 0 MI/YR9,008.32$ -$ 0.113Devil Canyon Low Level CrossingCrossing (7.88 Miles) Clearing 0 ACRE11,416.62$ Waste Excavation0 CY9.51$ Common Excavation0 CY8.32$ Rock Excavation0 CY28.45$ 18" Culverts 0 LF62.55$ Bridge0 LS120,000,000.00$ D-1 Base Material0 TON45.47$ Maintenance 0 MI/YR11,258.74$ 0.114Gold Creek- Watana (41.25 miles)0 LS28,132,000$ Page 58 of 61
Page 59 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)Description0.12Permanent Roads and Bridges0.124 Parks Highway to Watana (62 mi)0 MI3,000,000.00$ -$ 0.125 Susitna Bridge0 SF450.00$ -$ 0.2Rail Facilities0.24Permanent Railroad (including railheads)0.244Gold Creek to Watana- RailR-1, (33 Mi)Clearing671 AC11,416.62$ 7,662,183$ Waste Excavation1687883 CY9.51$ 16,051,766$ Common Excavation3307678 CY8.32$ 27,519,880$ Rock Excavation9114 CY28.51$ 259,867$ Borrow449500 CY11.88$ 5,340,060$ Subballast711055 CY18.15$ 12,902,807$ Grade "A" Base Material6650 CY35.45$ 235,729$ D-1 Base material2400 TON43.20$ 103,680$ A.C. Surfacing2200 TON198.00$ 435,600$ Dock Lumber16 MBF1,258.60$ 20,138$ 18" Culvert20093 LF68.26$ 1,371,458$ 36" + Culverts0 LS92,160.00$ -$ Fabric12930 SY9.00$ 116,369$ Thaw Pipes41843 LF95.04$ 3,976,745$ Topsoil & Seed431 AC10,800.00$ 4,653,257$ Rail Yard Control Devices1 LS1,800.00$ 1,800$ Bridges0 SF900.00$ -$ Trackage325940 LF350.00$ 114,079,000$ MaintenanceRail406 Mile-years10,000.00$ 4,060,000$ Railhead 7 years 75,000.00$ 525,000$ 0.13 Site Roads0.131 Construction RoadsSite Roads 20 Mile 750,000.00$ 15,000,000$ Maintenance 102 MI/YRS 223,092.85$ 22,755,000$ 0.132 Permanent RoadsPermanent Roads 6 MILE 1,287,997.42$ 7,728,000$ 0.3 Airstrip0.31 AirstripPermanent Airstrip 1 LS 12,798,000.00$ 12,798,000$ 9 years maintenance savings 1 LSTemporary Airstrip 1 LD 2,133,000.00$ 2,133,000$ 0.4 Saved Maintenance1 LS (5,067,889.52)$ (5,068,000)$ 254,700,000$ Transmission Plant350Land and Land Rights Land and Land RightsTransmission33 MILE 86,720.00$ 2,862,000$ Substations (4 Sites)0 LS 2,607,000.00$ -$ 2,862,000$ 352Substation and Switching Station0.1Switchyard0.11Switchyard2 LS14,000,000.00$ 28,000,000$ 28,000,000$ 353Substation/Switching Station EquipmentEster0 LS 57,922,800.00$ -$ Willow0 LS 3,613,020.00$ -$ Knik Arm0 LS 29,838,300.00$ -$ University0 LS 88,685,400.00$ -$ Devil Canyon0 LS 35,585,550.00$ -$ Willow Energy Management System (EMS) Equipment and System Costs 0 LS 27,326,100.00$ -$ Microwave Communication Equipment 0 LS 11,660,400.00$ -$ EMS Control Center Building 0 LS 9,148,200.00$ -$ Watana and Devil Canyon In-plant Monitor and Control Equipment 0 LS 8,619,690.00$ -$ -$ 354Steel Towers and FixturesTowers (Including Foundation and Hardware)33 miles 4,500,000.00$ 148,500,000$ 148,500,000$ 356Conductors and DevicesConductors0 MILE 218,281.33$ -$ Page 59 of 61
Page 60 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionSubmarine Cables0 EACH 15,808,340.56$ -$ -$ 359Roads and TrailsRoads and Trails200 MILE 75,744.00$ 15,149,000$ Clearing and Roads340 MILE 37,872.00$ 12,876,000$ 28,000,000$ 207,362,000$ General Plant389Land and Land RightsLand and Land Rights-$ 390Structures and ImprovementsStructures and Improvements-$ 391Office Furniture and EquipmentOffice Furniture and Equipment-$ 392Transportation EquipmentTransportation Equipment-$ 393Stores EquipmentStores Equipment-$ 394Tools Shop and Garage EquipmentTools Shop and Garage Equipment-$ 395Laboratory EquipmentLaboratory Equipment-$ 396Power-Operated EquipmentPower-Operated Equipment-$ 397Communications EquipmentCommunications Equipment-$ 398Miscellaneous EquipmentMiscellaneous Equipment-$ 399Other Tangible PropertyOther Tangible Property1 LS 16,000,000$ 16,000,000$ Saved Maintence1 LS (231,220)$ (231,000)$ 15,800,000$ Indirect Costs61Temporary Construction FacilitiesTemporary Construction Facilities62Construction EquipmentConstruction Equipment63Main Construction Camp 0.1Main Construction Camp1 LS316,340,280$ Saved Maintence1 LS(6,172,493.27)$ Site Preparation3270533Buildings15019120utilities1217266730462320 5 152,311,600.00$ MAIN CONSTRUCTION VILLAGEsite prep3540080buildings10008187utilities491416018462426.67 5 92,312,133.33$ 152,311,600$ 123,800,000$ Camp cost to reflect lower volume ( 0.8125) *Previous Estimate doesn't total C64Labor ExpenseLabor Expense(Included In Direct Costs)65SuperintendenceSuperintendence(Included In Direct Costs)66InsuranceInsurance(Included In Direct Costs)68Mitigation Fishery, Terrestrial and RecrationalMitigation(Not included in 1982 study) -$ 69FeesPage 60 of 61
Page 61 of 61Denotes Qty Adjustment by RSTFERC Line # Sub CategoriesQuantity Units Unit Price Line Price Total Notes / RemarksLow Watana RCC Arch Alternative (4 Turbines)DescriptionFeesSubtotalDirect Construction Cost2,665,300,000$ Contingency21.313%568,100,000$ Used Same Contingency as Full RCCSubtotal71AEngineering (4%), Enviornmental (2%), Regulatory(1%) and Construction Management (7%186,600,000$ 71BConstruction Management (4%)4%106,600,000$ 72Legal Expenses0%75Taxes0%76Administrative & Gen. Expenses0%77Interest0%80Earnings/Expenses During Construction0%Total Project Cost3,526,600,000$ r of Years for Base Case20.5 yearsr of Years for Full Watana16.5 yearsPage 61 of 61