HomeMy WebLinkAboutHydaburg City Schools Wood Fired Boiler Project Feasibility Study - Nov 2013 - REF Grant 7081131Hydaburg, Alaska
Biomass Heat Feasibility Study
Prepared for: Haida Corporation
November 11, 2013
Prepared by:
Energy Action
Wynne Auld
Forest & Land Management, Inc.
Clare E. Doig, CF, ACF
With support from:
Alaska Village Initiatives
1231 W. Northern Lights #578
Anchorage, AK 99503
CONTENTS
Acknowledgements ...................................................................................................................................... iii
Executive Summary ....................................................................................................................................... 4
1.0 Introduction ............................................................................................................................................ 6
2.0 Objective ................................................................................................................................................. 6
3.0 Community Information ......................................................................................................................... 6
4.0 Community Meeting & Energy Planning ................................................................................................. 7
5.0 Forest Resources of the Hydaburg Area ................................................................................................. 8
5.1 Wood Fuel Alternatives for Hydaburg .................................................................................................... 9
6.0 Project Buildings ................................................................................................................................... 11
6.1 Building Energy Use & Cost ................................................................................................................... 14
6.2 Biomass Boiler Sizing ............................................................................................................................. 14
6.3 Biomass Energy Use & Cost .................................................................................................................. 15
7.0 Project Options ..................................................................................................................................... 15
8.0 Summary of Results .............................................................................................................................. 17
8.0 Project Analysis: ANB Hall ..................................................................................................................... 18
9.0 Project Analysis: Boys & Girls Club ....................................................................................................... 24
10.0 Project Analysis: VPSO Building .......................................................................................................... 30
11.0 Project Analysis: Hydaburg City School District .................................................................................. 36
12.0 Hydaburg MUF Building (in planning phase) ...................................................................................... 42
11. Conclusion ............................................................................................................................................. 43
APPENDIX A Site Photos
APPENDIX B Buildings not Surveyed
APPENDIX C Comprehensive Energy Audit for Hydaburg Head Start
APPENDIX D -- LED Light Payback Chart
ACKNOWLEDGEMENTS
The following individuals prepared the Hydaburg Biomass Heat Feasibility Study
Wynne Auld Energy Action, LLC
Clare E. Doig, ACF, CF Forest & Land Management Inc.
Assistance and guidance was provided by:
Lisa Lang, Hydaburg Corporation
Doreen Witwer, Hydaburg Cooperative Association
Anthony Christiansen, City of Hydaburg
Natasha Peele, City of Hydaburg
Lauren Burch, Hydaburg City School District
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EXECUTIVE SUMMARY
This report is a community-wide biomass assessment prepared for the community of Hydaburg. The
project scope was determined by community input, as well as specific building owner interest. The
report contains biomass resource assessment and feasibility analysis for specific biomass heat projects.
Conservation and efficiency are usually more effective cost-saving energy measures than renewable
energy projects, including biomass heat. Although energy efficiency analysis is outside the scope of this
report, we have developed a set of energy efficiency recommendations and resources that may be
helpful to the community of Hydaburg.
Prior to further considering biomass, we recommend:
1. Develop a community strategic energy plan based on community priorities, using affordability as
the starting point. Consolidation of City, Corporation, and Tribe offices may be a preferred
strategy.
2. Conduct energy audits for all priority community buildings, and implement key efficiency
measures. Key measures that are known to have fast payback include set-back thermostats,
lighting controls, and lighting upgrades.
3. Develop an energy policy and establish an Energy Conservation Manager to provide energy
conservation services to all community organizations. Such Managers have been found to be
effective in reducing energy-related building operating costs. This Manager can track energy
related operating costs, help owners make informed decisions about operating schedules and
facility usage, and implement efficiency measures. 1
4. Pool operator training dollars and professional capacity among community organizations by
sharing (an) operator(s).
It appears that the community of Hydaburg has significant existing local and regional human resources
upon which to draw. Jess Dilts, the director of housing at Hydaburg Cooperative Association, serves as a
board member for the Cold Climate Housing Research Center. Jess has been instrumental in developing
energy efficient housing prototypes for the Habitat Congress Building America program. Some of the
weatherization retrofits he has directed have decreased building energy use by 30 50%. Jess has
Weatherization Tech II and III certification and has considered becoming a certified energy rater. Mayor
Anthony Christianson is currently conducting a home energy survey and has begun upgrading all street
lights to LEDs. Certified energy raters are based in Sitka and Juneau.
The following are a list of known resources to assist the community of Hydaburg in enacting the above
recommendations:
1. Comprehensive Energy Audit for Hydaburg Head Start included as Appendix C
2. LED light payback chart included as Appendix D
3. Energy Efficiency Toolkit Loan Program offers a toolkit for checkout, to be mailed to anywhere in
Alaska. The tools available are: watt meters, light meters, ballast checker, occupancy light sensor
and data loggers, and temperature and humidity data loggers.
<http://www.akenergyauthority.org/eec-toolloankit.html>
4. Funding for community energy planning and project implementation US DOE START Program,
<http://energy.gov/indianenergy/resources/start-program/alaska-start>
5. Funding for energy efficiency Alaska Energy Authority Village Energy Efficiency Program,
http://www.akenergyauthority.org/programsalternativeVEEP.html
1 Alaska Housing Finance Corporation, A White Paper on (October 29, 2012),
3.
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With regard to biomass heat, the resource assessment recommends that harvest on Haida Corporation
lands be limited to 10 to 15 acres per year, which would produce 200 to 300 cords of firewood. This
volume would more than supply all projects examined in the report, excluding the Hydaburg City
Schools project. We recommend the Hydaburg City Schools project source semi-dry craft wood chips
from Viking Lumber Mills in Klawock. Utilizing the existing chipping and drying infrastructure in Klawock
is highly recommended for a project of this scale.
Projects have been modeled sourcing local cordwood at the prevailing market price of $250/cord,
although, an entrepreneur in Thorne Bay, who is manufacturing firewood using a firewood processor, is
selling firewood for $155/cord. Semi-dry craft chips are available delivered to Hydaburg for an estimated
$156/ton (20% moisture content), the equivalent of $1.61/ gallon.
The report assesses five potential biomass projects:
Project A: Cordwood heater serving the ANB Hall
Project B: Cordwood stove serving the Boys & Girls Club
Project C: Cordwood stove serving the VPSO building
Project D: Wood chip boiler serving the Hydaburg City School District High School, Elementary
School, and Gymnasium
Project E: Cordwood heater serving the Hydaburg MUF building (in the planning phase)
Of the projects evaluated, Projects B & C, serving the Boys & Girls Club and VPSO building, are
considered economically feasible.
Project D, serving the Hydaburg City Schools is marginally feasible, with a benefit / cost ratio of 1.01.
Project A, serving the ANB Hall, is not feasible at this time.
Project E, serving the MUF building (planning phase) was not economically evaluated because there are
no design parameters associated with the future project. However, an estimate of probable costs for a
given project scope was provided.
In addition to the aforementioned energy efficiency measures, we recommend the following steps to
develop biomass heat in Hydaburg:
1. Install wood stoves in the Boys & Girls Club and VPSO buildings, in addition to implementing
recommended energy efficiency measures (Appendix C).
2. Consider biomass heat in a future MUF building (planning phase).
3. Monitor local biomass fuel and fuel oil prices for ongoing consideration of a woodchip energy
project serving the Hydaburg Schools.
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1.0 INTRODUCTION
Energy Action, LLC, in collaboration with Forest & Land Management Inc, was retained by Alaska Village
Initiatives to assess the feasibility of biomass heat for the community of Hydaburg. The scope of the
project was determined by community input and technical factors.
Biomass heat is a well-established energy source on Prince of Wales Island for both commercial and
residential buildings. Several schools in the Southeast Island School District, as well as the City of Craig
Pool, are heated by commercial biomass energy systems.
Community input was offered during a community meeting, held October 8, 2013. Information on
building heating systems was collected during site visits October 7 9, with some information and data
provided by building managers. Groundwork for the resource assessment was completed during the
same site visit, using on-the-ground observations.
This analysis assumes that all existing heat systems stay in place, with biomass offsetting a certain
percentage of load. Cordwood systems were estimated to offset 80% of load, while the wood chip
system was estimated to offset 90% of load. The specific fuel determined to be available to the projects
is cordwood (15.3 MMBTU/ cord) at $250/cord and semi-dried wood chips (10.5 MMBTU/ ton) at
$156/ton delivered.
The specific buildings surveyed for biomass heat were the ANB Hall, Boys and Girls Club, VPSO building,
Hydaburg City School buildings. The City Hall was not included in the study due to its deteriorated
condition due to age and water leaks.
2.0 OBJECTIVE
The community of Hydaburg seeks to consider possibilities for reducing energy cost and creating other
local benefits through utilization of local renewable wood fuels. This report examines the feasibility of
community-scale biomass heat projects in Hydaburg.
3.0 COMMUNITY INFORMATION
Hydaburg is located on the west side of Prince of Wales Island in Southeast Alaska. Its history began
school for the children of the three Native villages. The residents, which are predominantly Natives of
Haida descent, actively pursue their subsistence life-style, and actively participate in the preservation
and promotion of their cultural heritage.
According to the 2010 Census, the population of Hydaburg was 376 people, with a total of 139 housing
units.
The community has four key entities Haida Corporation (the Native Village Corporation), City of
Hydaburg, Hydaburg Cooperative Association (the Tribal Government), and the Hydaburg City School
District.
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The area is a characterized by a cool, moist, maritime climate. Summer temperatures range from 49ºto
63 °F; winter temperatures range from 32ºto 42 °F. Average annual precipitation is 120 inches, with 40
inches of snow. Temperatures range between 32ºand 63 °F. The community logs about 7,600 heating
degree days per year2.
A two-lane paved State highway connects Hydaburg with the ferry terminal at Hollis, which links the
community to Ketchikan, the regional transportation hub and port, through which much of the materials
and supplies consumed in Hydaburg pass. The distance to Hollis is thirty-two miles. The ferry ride
between Hollis and Ketchikan is approximately three and one-half hours. Distances from Hydaburg to
other communities on the Island are: Craig 35 miles, Klawock -30 miles, and Thorne Bay 63 miles.
Prince of Wales Island has an extensive history with commercial and industrial timber harvesting. Most
of the Island is publically owned, managed by the Tongass National Forest. The productivity of its
temperate rain forests is relatively high; with four primary softwood species of trees: western hemlock,
Sitka spruce, western red cedar, and Alaska yellow cedar.
4.0 COMMUNITY MEETING & ENERGY PLANNING
A community meeting was held to learn from Hydaburg community members about preferences,
technical conditions, and knowledge pertinent to a biomass energy project.
The meeting was an agenda item at the United Front meeting, which is formed by four (4) key entities
Haida Corporation, City of Hydaburg, Hydaburg Cooperative Association, and the Hydaburg City School
District. The United Front was formed to promote economic development and address land protection
issues in Hydaburg. Ten community members were present, which included representatives of the
entities mentioned above, as well as the general public.
Key information that emerged from the meeting follows.
There is a strong awareness of the role energy plays in the current and future sustainability of
the community. The City Mayor expressed intent to create a community energy plan. Energy
audits have been completed for two City buildings the Firehall and Boys & Girls Club.
2 BizEE Degree Days, www.degreedays.net (October 1, 2013)
Figure 1: Community of Hydaburg
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Additionally, an energy audit of street lights was completed, and the City has started to install
LED lights in its boat harbor and streets. A home energy survey is underway to develop a
community emissions inventory and draft an air quality plan, thanks to an EPA IGAP grant. The
survey will inventory home heating fuel volumes and types (wood, electric, fossil fuel). The
community as a whole has been transition back to wood stoves for home heating3.
There is a strong awareness of structural and energy efficiency deficiencies in community
buildings, especially the City Hall and ANB Hall. The HCA and Corporation Office buildings, which
are newer, are more energy efficient than the City Hall and Boys and Girls Club.
Some planning is underway to house the United Front entities in a single building, i.e. a multi-
purpose building.
There is a strong consensus of the need for economic development and growth in Hydaburg.
The community is actively pursuing economic development through improvement of
infrastructure to support fisheries, tourism and local small business.
Representatives of the United Front expressed a strong desire to use local wood fuels for the
creation of jobs.
Representatives of the United Front also expressed the potential of collaboration to operate and
maintain multiple biomass energy units (i.e. cordwood boilers). A single person could operate
and maintain multiple boilers on a service circuit to minimize operating costs.
There is existing local portable sawmill equipment, which community members suggested would
be a good asset for in-kind contributions to energy projects. This effort would follow in the
footsteps of the totem carving shed, which was recently erected using local materials, in-kind
labor, and a small grant ($20,000) from the Rasmusson Foundation. There may be another small
sawmill purchased for milling local building materials and crafts.
There was some expressed interest in appropriately-scaled harvesting and processing
equipment, such as a firewood processor, to aid in community-scale biomass energy
development
There was some discussion of the availability of funding for these types of projects
5.0 FOREST RESOURCES OF THE HYDABURG AREA
Haida Corporation owns approximately 5,270 acres of land within three miles of the community, which
contains muskegs, scrub timber, and areas of second growth trees resulting from commercial harvest
operations in the period 1982 to 1995. To the east and north, the lands are owned by Sealaska
Corporation (the Native regional corporation) and the U.S. Forest Service. Due to prior commercial
timber harvest, the areas formerly occupied by commercial timber stands have mostly been harvested
and are currently in young growth timber less than 35 years old.
3 Anthony Christianson, stated in the public meeting, October 8, 2013.
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5.1 WOOD FUEL ALTERNATIVES FOR HYDABURG
The alternatives for wood energy fuels in this area include cordwood (firewood), green wood chips,
dried wood chips, and pellets. The locally available products (cordwood and green wood chips) would
involve harvesting trees from areas that were not previously harvested due to the low commercial value
of the trees
areas can be harvested with conventional equipment, the economic viability will depend on careful
planning, mi
be produced. In order to ensure sustainability of this resource, planting after harvest and future
silvicultural treatments to control stocking levels will be necessary. There is some potential for
increasing the available acreage for this type of harvest by acquiring harvesting rights from Sealaska
Corporation, which also owns significant acreage in this area.
e, western hemlock, Alaska yellow cedar,
western red cedar, and lodgepole pine trees. Growing conditions are generally poor, therefore the
resulting trees tend to be small, with high defect (rot), and often misshaped boles.
As a rough estimate, harvest on Haida Corporation lands should be limited to 10 to 15 acres per year;
this could yield 1,500 to 2,000 green tons per year (assuming chipping all wood harvested); or 200 to
300 cords per year of firewood (including all species); or 200 cords per year plus 5,000 to 10,000 board
feet of small sawlogs (spruce, cedar).
Figure 2: contains spruce, hemlock, yellow cedar, red
cedar, and lodgepole pine.
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To produce significant amounts of wood fuel from local lands, the following production factors would
need to be identified and in place: 1) a contractor to construct access roads and harvest the wood, 2) a
chipper to chip the logs, tops and limbs, and/or 3) a firewood processor to cut and split logs into
firewood.
Currently there is a market for firewood harvested. Firewood is harvested from stands along the road
system, logs left from right-of-way clearing, and logs occasionally delivered to Hydaburg by Sealaska
Timber Corporation. A loaded pickup truck of firewood (approximately ½ cord) sells for $150 if it is
hemlock and/or spruce; and $175 per pickup truck load if it is yellow cedar.
In Thorne Bay, on the east side of Prince of Wales Island, an individual entrepreneur is operating a
mechanical firewood processor and sells firewood for $155/cord.
Other sources of wood fuel readily available to Hydaburg include:
Viking Lumber Company in Klawock
o Green chips currently quoted at $50/Bone Dry Ton picked up at the mill.
o Dry chips (in the near future) $110/ ton (20% moisture content) picked up at the mill,
for an estimated delivered price of $156 to the community of Hydaburg
The delivered cost for chips will depend on 1) whether the chips are wet or dry, 2) size of truck, 3) total
time for loading, unloading , and travel.
Tongass Forest Products in Ketchikan.
o Pellets for $275 per ton FOB Ketchikan
Other sources of pellets
o Current pellet sourcing on Prince of Wales Island suggests bagged pellets can be
obtained for $375 per ton
Delivery cost for pellets will, to a large part depend on whether an enterprise on Prince of Wales Island
becomes a distributor on the Island, with suitable equipment for delivery to the storage container of the
pellet customer.
In summary, to maintain resource sustainability, Haida Corporation lands in the vicinity can likely supply
sufficient firewood for 200 to 300 cords per year, at a cost of $175 to $300 per cord. This volume could
be increased by arranging long term contracts for harvest on adjacent lands, such as those owned by
Sealaska Corporation.
Any local firewood or wood biomass harvest operation should be organized to achieve the highest value
from the logs of any trees harvested this would require cutting sawlog quality logs and selling them to
a purchaser at a fair market value.
For a project such as a chip fueled heating system for the Hydaburg Schools, the relatively small scale
harvesting and production of green wood chips would most likely be 150%+ the price of dry or green
chips purchased from Viking Lumber Company.
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6.0 PROJECT BUILDINGS
The buildings were selected for biomass heat evaluation dependent on building owner interest.
Surveyed Buildings were:
ANB Hall
Boys & Girls Club
VSPO Building
Hydaburg City School High School, Elementary School, and Gymnasium
Photos of surveyed buildings are included as Appendix A. The City Hall was surveyed but not considered
for biomass, as described in Appendix B.
Specifications of an MUF building (in the planning phase) that could be heated by biomass is also
considered in this section of the report.
ANB HALL
The ANB Hall is an approximately 4,000 square foot stick frame building, built in the 1940s. The building
is a very important community building, and is used regularly for bingo, weddings, funerals, meetings,
and other community events. In 2012, the building used about 2,674 gallons of fuel oil #1.
The building is heated by a 115,000 btu/hr Olsen HTL-100C oil furnace. The furnace is located on the
street-level floor and distributes heat via ducts in a false ceiling along the balcony of the Hall. According
to HCA personnel, this boiler is not able to keep the building at a comfortable temperature during
winter cold spells.
The ANB Hall also has a large daylight basement that is currently used to store tools and equipment. The
in some areas. The basement is accessible from a narrow gravel driveway which slopes down toward the
water.
The building is considered very inefficient. A recent weatherization training hosted in the ANB Hall could
not successfully perform the blower door test due to the poor air sealing throughout the building.4 Using
current fuel consumption figures, the EUI of the building was calculated to be about 180,000 btu/ sq. ft.
The Hydaburg Cooperative Association seeks to weatherize the Hall. Reducing the building energy cost
either by weatherization, replacing the building, or rendering the building obsolete by holding
community functions in a different community building is the first step toward efficient heating.
Implementing all cost-effective energy efficiency measures tend to reduce building energy cost by about
30%5. The potential for biomass heat cannot be accurately assessed for a highly inefficient building.
4 Jess Dilts, communication during site visit, October 9, 2013.
5 Katie Conway, email communication regarding general outcomes of village energy efficiency projects, October 7,
2013.
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BOYS & GIRLS CLUB
The Boys & Girls Club is about a 4,200 square foot stick frame building, built in the early 90s. The
building is used a few hours a day for youth after school activities. The Club used about 1,330 gallons of
fuel oil #1 in 2012 for space heating and domestic hot water.
The majority of the building space is a single large room with game activities and tables. There is also a
kitchen, office, closets, and boys and girls bathrooms.
The building is heated by a 104,000 btu/hr Olsen MPL-120 oil furnace in fair condition. Hot air is
dispensed throughout the building by floor vents.
The Boys & Girls Club underwent an energy audit in 2012. The audit determined three cost-saving
measures: install two set-back thermostats to reduce temperature to 60° F. when the space is
unoccupied, and air sealing. All three of these measures are estimated to cost about $510 and payback
in just 6 months6. It is recommended that this be implemented immediately. The audit is included with
this report as Appendix C.
VPSO BUILDING
The VPSO building, also known as the Headstart building, is approximately 3,500 square feet modular
two buildings. The buildings have been in place since at least a decade. The eastern half of the building is
used as a residence for the VPSO officer, while the western half is currently unoccupied but remains
heated. In 2012 the building used 1,292 gallons of fuel oil #1.
Both halves have a separate point-source heating device. The residence is heated by a Laser 56, with an
output of 22,000 btu/hr. The non-residence part of the building was not accessed during the site visit,
but was also assumed to be heated by a Laser 56 heater.
HYDABURG CITY SCHOOL DISTRICT
The Hydaburg City School District is made of three buildings the High School, Elementary School, and
Gymnasium. About 65 students are currently enrolled in the District. All buildings have hydronic boilers
coupled with air handling systems. In 2011, the three School buildings used 28,323 gallons of fuel oil.7
HIGH SCHOOL
The High School is an approximately 26,250 square foot building, comprised of classrooms and two
vocational shops. In 2011, the High School used 7,606 gallons of fuel oil.8 The School is heated by a Weil
McClain 976 boiler with 550,000 btu output. The boiler is 20+ years old.9 Heat is distributed throughout
the building through both hydronic baseboards and forced air ducts. An air handling system is located in
the attic of the metal shop. This building was constructed in 1977.
6
7 AEA Round 6 Application, Hydaburg City Schools.
8 AEA Round 6 Application, Hydaburg City Schools.
9 AEA Round 6 Application, Hydaburg City Schools.
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ELEMENTARY SCHOOL
The Elementary School is an approximately 73,000 square foot building, holding a media center, offices,
and elementary classrooms. The Elementary School is the oldest of the three District buildings. In 2011,
the Elementary School used approximately 13,038 gallons of fuel oil #1.10
The Elementary School is heated by two (2) Weil McClain 878 boilers with 770,000 btu output, and also
has an air handling system and an indirect hot water heater. The boilers are 20+ years old.11
The original school building was constructed in 1963. The Library and Office wing was added in 1975. An
addition was completed in 1992.
GYMNASIUM
The Gymnasium is an approximately 50,000 square foot building, with two classrooms and an air
handling system in the second story. In 2011, the Gym used 7,722 gallons of fuel oil. It is outfitted with 2
Burnham V36 fuel oil boilers, with 302,000 btu output and an indirect hot water heater. The boilers are
20+ years old12. It also has an air handling system. 13 The gymnasium was built in 1982 and the heating
system was renovated in 2004.
FUTURE MULTI-USE FACILITY (MUF) in planning phase
As discussed in the community meeting section, there is a strong interest in housing organizations of the
United Front under a single roof in a new, high efficiency building. Toward that end, a future MUF
building has been included in this study, modeled after the new Grayling MUF building. That building is
designed by CTA Architects Engineers and currently under construction by Lars Construction
Management Co.
The Grayling MUF building is 5,225 square feet, and is designed with a biomass primary heat source and
oil as the supplementary and back up heat source. For the purpose of this report, the future MUF
building is estimated to have an EUI of about 37,000 btus/ sq. ft14, requiring the equivalent of about
1,430 gallons of fuel oil per year.
10 AEA Round 6 Application, Hydaburg City Schools.
11 AEA Round 6 Application, Hydaburg City Schools.
12 AEA Round 6 Application, Hydaburg City Schools.
13 AEA Round 6 Application, Hydaburg City Schools.
14 Alaska Housing Finance Corporation,
Region 1 (non-Juneau) (October 29, 2012), 30.
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6.1 BUILDING ENERGY USE & COST
6.2 BIOMASS BOILER SIZING
Fuel Oil
Consumption
(gallons)
Annual Oil Cost
($4.32/gal)
ANB Hall 2,674 $ 11,552
Boys & Girls Club 1,330 $ 5,746
VPSO building 1,292 $ 5,581
High School 7,606 $ 32,858
Elementary School 13,038 $ 56,324
Gymnasium 7,722 $ 33,359
TOTAL 33,662 $ 145,420
ANNUAL FUEL OIL USE & COST
BUILDING ENERGY USE & COSTS
Building Current heat
capacity (MMBTU)
Biomass Heater
Type
Proposed biomass
capacity (MMBTU)
ANB Hall 0.115 cordwood furnace 0.20
Boys & Girls Club 0.104
cordwood stove 0.10
VPSO Building 0.044
cordwood stove 0.09
High School 0.550
Elementary School 0.770
Gymnasium 0.302
BIOMASS BOILER SIZING
1.0
Notes
Based on HDD model; sized to limit
stoking cost and store heat
100% of existing capacity
100% of existing capacity
Based on HDD modelchip boiler
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6.3 BIOMASS ENERGY USE & COST
7.0 PROJECT OPTIONS
Project A. A cordwood heating system serving the ANB Hall
LOCATION AND ACCESS: The biomass heat equipment would be located in the daylight
basement of the ANB Hall. Access is via a gravel driveway sloping down to the basement door.
The building is easily accessible to delivery trailers from the paved street.
BIOMASS SYSTEM CAPACITY: Weatherization is needed for this building. Prior to weatherization,
the heat load cannot be accurately sized. For the purpose of this report, the biomass heat
system was sized at 0.2 MMBTU to limit stoking costs and store heat.
BIOMASS FUELS: seasoned cordwood, cut to manufacturer specifications
APPLICABLE FUEL STORAGE INFASTRUCTURE: On site
APPLICABLE FUEL HANDLING INFRASTRUCTURE: manual handling
APPROXIMATE FOOTPRINT: 15 x 20 sq. ft. for biomass plant, 800 sq. ft. for cordwood storage
HEATING SYSTEM INTEGRATION: A water to air heat exchanger could be used to convert hot
water from the boiler into hot air, distributed in the existing heat ducts
COMPARISON OF FUEL COSTS
FUEL COST Fuel Oil
($4.32/ gal)
Cordwood
(@ $250/ cord)
Chips -- 20% MC
(@ 156/ ton)
Pellets
(@ $375/ton)
$ per gross mmbtu 32.00$ 16.34$ 14.77$ 27.57$
BIOMASS ENERGY USE & COST
BIOMASS ASSUMPTIONS MMBTU Price
Cordwood (per cord) 15.30 250$
Chips -- 20% (per ton) 10.56 156$
Fuel Oil Offset
(gallons)
Annual Wood
Consumption Annual Wood Cost
ANB Hall* 2139 19 cords 2,250$
Boys & Girls Club* 1064 9 cords 2,250$
VPSO building* 1034 9 cords 4,750$
High School**
Elementary School**
Gymnasium**
* assumes 80% fuel oil displacement
** assumes 90% fuel oil displacement
25,529 326 tons
( 20% MC chips)50,856$
Page 16 of 43
Project B: A cordwood stove serving the Boys & Girls Club
LOCATION AND ACCESS: The biomass heat equipment would be located inside the building in the
main room. Access is controlled via locked doors.
BIOMASS SYSTEM CAPACITY: 0.10 MMBTU
BIOMASS FUELS: seasoned cordwood, cut to manufacturer specifications
APPLICABLE FUEL STORAGE INFASTRUCTURE: Storage area behind the building or off site
APPLICABLE FUEL HANDLING INFRASTRUCTURE: manual handling
APPROXIMATE FOOTPRINT: 5 x 5 sq. ft. for biomass heater
HEATING SYSTEM INTEGRATION: This is a point source heater. No heating system integration
needed. A new stack will need to be installed.
Project C: A cordwood stove serving the VPSO building
LOCATION AND ACCESS: The biomass heat equipment would be located inside the VPSO residence.
BIOMASS SYSTEM CAPACITY: 0.044 MMBTU
BIOMASS FUELS: seasoned cordwood, cut to manufacturer specifications
APPLICABLE FUEL STORAGE INFASTRUCTURE: Storage area behind the building or off site
APPLICABLE FUEL HANDLING INFRASTRUCTURE: manual handling
APPROXIMATE FOOTPRINT: 5 x 5 sq. ft. for biomass heater
HEATING SYSTEM INTEGRATION: This is a point source heater. No heating system integration
needed. A new stack will need to be installed.
Project D. A semi-dry (20%) wood chip boiler serving the Hydaburg City School District High School,
Elementary School, and Gymnasium
LOCATION AND ACCESS: A prefabricated building placed on a slab behind the gymnasium
BIOMASS SYSTEM CAPACITY: 1.0 MMBTU
BIOMASS FUELS: semi-dry wood chips, 20% moisture
APPLICABLE FUEL STORAGE INFASTRUCTURE: wood chip silo
APPLICABLE FUEL HANDLING INFRASTRUCTURE: automated
APPROXIMATE FOOTPRINT: 350 sq. ft
HEATING SYSTEM INTEGRATION: The distribution piping runs through the gymnasium, then below
grade to each of the school buildings. Buildings are isolated by heat exchangers.
Project E: A cordwood boiler serving the MUF building (in planning phase).
LOCATION AND ACCESS: The heater would be integrated into new construction, with a wood
heater as the primary heat source and oil heat as supplementary/ back up
BIOMASS SYSTEM CAPACITY: 0.1 MMBTU
BIOMASS FUELS: tbd by building design load
APPLICABLE FUEL STORAGE INFASTRUCTURE: deck
APPLICABLE FUEL HANDLING INFRASTRUCTURE: manual
APPROXIMATE FOOTPRINT: tbd
HEATING SYSTEM INTEGRATION: new construction
Page 17 of 43
8.0 SUMMARY OF RESULTS
PROJECT OPTION A B C D E
COST 96,269$ 6,692$ 12,988$ 1,140,017$ 87,372$
ANB Hall Boys & Girls VPSO School MUF (planning)
Capital Cost 96,269$ 6,692$ 12,988$ 1,140,017$ 87,372$
Yr. 1 Operating Savings $2,021 3,693$ $1,036 $74,389 n/a
Simple Payback 47.6 1.8 12.5 15.3 n/a
Net Project Benefit ($66,009)$49,468 $1,461 $13,513 n/a
Benefit / Cost Ratio 0.29 8.6 1.12 1.01 n/a
CO2 Offset (tons/yr) 32,255 27,699 26,918 650,825 n/a
Stack Emissions (lbs /yr) 38 19 19 449 n/a
ESTIMATE OF PROBABLE COST
ECONOMIC PARAMETERS
Page 18 of 43
Figure 3: Proposed location of biomass boiler building, with controlled access gate, good
fuel delivery access, and close connection to Water Plant. Utility doors at the water plant
would require clearance.
8.0 PROJECT ANALYSIS: ANB HALL
Page 19 of 43
EXISTING ENERGY USE SUMMARY Notes
HDD Oil (gal)* Gallons, total (space + baseload, 2012)1 2,674
Jan 835 Peak heat demand (MMBTU / day)1.729
Feb 742
Mar 890 BIOMASS HEATER SPECIFICATIONS
Apr 729 Recommended heater size -- Cordwood (average MMBTU/ hr) 2 n/a
May 478 Modeled heater size (MMBTU/hr) 0.2
Jun 299 Number of heaters 1
Jul 247
Aug 190 Fuel oil offset per year (gallons) 3 2,139
Sep 319 Biomass fuel offset per year (%) 80%
Oct 716 Biomass per year (cords)19
Nov 774 Fuel oil per year (gal, supplement)535
Dec 963
TOTAL 7,182 2,674 O&M SPECIFICATIONS -- BIOMASS STOKIING
* AEA Round 6 Application Modeled heater size (MMBTU)0.2
Average stokings per day to cover 80% of heat load 4 2.66
Total stokings per year to cover 80% of heat load 1082
Annual stoking hours per year 180
Annual stoking cost 5 4,507$
NOTES
1 Record supplied by Hydaburg Cooperative
2 Weatherization is recommended prior to heater sizing
3 80% of annual
4 10 min per stoking
5 $25/hr loaded labor rate
HEAT LOAD ANALYSIS -- ANB Hall
2012 HEAT DATA
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Date
ANB Hall
Page 20 of 43
Page 21 of 43
AEA B/C Model
Project Description
Community
Nearest Fuel Community
Region
RE Technology
Project ID
Applicant Name
Project Title
Category
Results
NPV Benefits $27,456
NPV Capital Costs $93,465
B/C Ratio 0.29
NPV Net Benefit ($66,009)
Performance Unit Value
Displaced Electricity kWh per year -
Displaced Electricity total lifetime kWh -
Displaced Petroleum Fuel gallons per year 2,632
Displaced Petroleum Fuel total lifetime gallons 53,480
Displaced Natural Gas mmBtu per year -
Displaced Natural Gas total lifetime mmBtu -
Avoided CO2 tonnes per year 27
Avoided CO2 total lifetime tonnes 543
Proposed System Unit Value
Capital Costs $96,269$
Project Start year 2014
Project Life years 20
Displaced Electric kWh per year -
Displaced Heat gallons displaced per year 2,139
Displaced Transportation gallons displaced per year -
Renewable Generation O&M$ per kWh
Electric Capacity kW
Electric Capacity Factor %
Heating Capacity Btu/hr 200,000
Heating Capacity Factor %
Base System Unit Value
Diesel Generator O&M $ per kWh 0.075$
Diesel Generation EfficiencykWh per gallon 13.00
Parameters Unit Value
Heating Fuel Premium $ per gallon 1.05$
Transportation Fuel Premium$ per gallon 1.58$
Discount Rate % per year 3%
Crude Oil $ per barrel EIA Mid
Natural Gas $ per mmBtu ISER - Mid
Hydaburg
Hydaburg
Rural
biomass
ANB Hall
Page 22 of 43 ANB Hall Benefit Cost Analysis, Yrs. 1 10
Page 23 of 43 ANB Hall Benefit Cost Analysis, Yrs. 1120
Page 24 of 43
9.0 PROJECT ANALYSIS: BOYS & GIRLS CLUB
Figure 4: Outline of Boys & Girls Club building.
Page 25 of 43
EXISTING ENERGY USE SUMMARY Notes
HDD Oil (gal)* Gallons, total (space + baseload, 2012)1 1,330
Jan 835 Peak heat demand (MMBTU / day)0.860
Feb 742
Mar 890 BIOMASS HEATER SPECIFICATIONS
Apr 729 Recommended heater size -- MMBTU/hr 0.104
May 478 Modeled heater size (MMBTU) -- average over 12 hours 2 0.051
Jun 299 Modeled heater size (MMBTU/hr) HHV max 0.7
Jul 247 Fuel oil offset per year (gallons) 3 1,064
Aug 190 Biomass fuel offset per year (%) 80%
Sep 319 Biomass per year (cords)9
Oct 716 Fuel oil per year (gal, supplement)266
Nov 774
Dec 963 O&M SPECIFICATIONS -- BIOMASS STOKIING
TOTAL 7,182 1,330 Modeled heater size (MMBTU)0.051
* AEA Round 6 Application Average stokings per day to cover 80% of heat load 4 0.9
Total stokings per year to cover 80% of heat load 266
Annual stoking hours per year 44
Annual stoking cost 5 1,108$
NOTES
1 Record supplied by City of Hydaburg
2 Cordwood stove; average heat over 12 hours is 0.29 MMBTU/hr
3 80% of annual load
4 10 min per stoking
5 $25/hr loaded labor rate
HEAT LOAD ANALYSIS -- Boys & Girls Club
2012 HEAT DATA
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Date
Boys & Girls Club
Page 26 of 43
Cordwood stove + stack 4,729$
Integration to existing heating system -$
Subtotal: 4,729$
Overhead -- 7%. No profit (self-performance) 331$
Subtotal: 5,060$
Remote factor -- n/a -- labor and parts are readily available -$
Subtotal: 5,060$
Design fees, Building permit, miscellaneous expenses -- 15% 759$
Subtotal 5,819$
Contingency -- 15% 873$
Total Project Cost 6,692$
BOYS & GIRLS CLUB -- BIOMASS HEAT
ESTIMATE OF PROBABLE COST
Page 27 of 43
AEA B/C Model
Project Description
Community
Nearest Fuel Community
Region
RE Technology
Project ID
Applicant Name
Project Title
Category
Results
NPV Benefits $55,984
NPV Capital Costs $6,497
B/C Ratio 8.62
NPV Net Benefit $49,486
Performance Unit Value
Displaced Electricity kWh per year -
Displaced Electricity total lifetime kWh -
Displaced Petroleum Fuel gallons per year 1,330
Displaced Petroleum Fuel total lifetime gallons 26,600
Displaced Natural Gas mmBtu per year -
Displaced Natural Gas total lifetime mmBtu -
Avoided CO2 tonnes per year 13
Avoided CO2 total lifetime tonnes 270
Proposed System Unit Value
Capital Costs $6,692$
Project Start year 2014
Project Life years 20
Displaced Electric kWh per year -
Displaced Heat gallons displaced per year 1,064
Displaced Transportation gallons displaced per year -
Renewable Generation O&M $ per kWh
Electric Capacity kW
Electric Capacity Factor %
Heating Capacity Btu/hr 0.051
Heating Capacity Factor %
Base System Unit Value
Diesel Generator O&M $ per kWh 0.075$
Diesel Generation Efficiency kWh per gallon
13.00
Parameters Unit Value
Heating Fuel Premium $ per gallon 1.05$
Transportation Fuel Premium $ per gallon 1.58$
Discount Rate % per year 3%
Crude Oil $ per barrel EIA Mid
Natural Gas $ per mmBtu ISER - Mid
Boys & Girls Club Biomass
Hydaburg
Hydaburg
Rural
biomass
Page 28 of 43 Boys & Girls Club Benefit Cost Analysis, Yrs. 110
Page 29 of 43 Boys & Girls Club Benefit Cost Analysis, Yrs. 1120
Page 30 of 43
10.0 PROJECT ANALYSIS: VPSO BUILDING
Figure 5: Outline of VPSO Building.
Page 31 of 43
EXISTING ENERGY USE SUMMARY Notes
HDD Oil (gal)* Gallons, total (space + baseload, 2012)1 1,292
Jan 835 Peak heat demand (MMBTU / day)0.835
Feb 742
Mar 890 BIOMASS HEATER SPECIFICATIONS
Apr 729 Recommended heater size (MMBTU/hr)0.088
May 478 Modeled heater size (MMBTU) -- average 12 hours 0.582
Jun 299 Modeled heater size (MMBTU/hr) HHV max 0.6
Jul 247 Fuel oil offset per year (gallons) 3 1,034
Aug 190 Biomass fuel offset per year (%) 80%
Sep 319 Biomass per year (cords)9
Oct 716 Fuel oil per year (gal, supplement)258
Nov 774
Dec 963 O&M SPECIFICATIONS -- BIOMASS STOKIING
TOTAL 7,182 1,292 Modeled heater size (MMBTU/hr) HHV max 0.6
* AEA Round 6 Application Average stokings per day to cover 80% of heat load 0.9
Total stokings per year to cover 80% of heat load 289
Annual stoking hours per year 4 96
Annual stoking cost 5 2,410$
NOTES
1 Record supplied by City of Hydaburg
2 Building is divided into two parts; this model is for a stove installed in each part
3
4 20 min per stoking (10 min per heater x 2 heaters)
6 $25/hr loaded labor rate
HEAT LOAD ANALYSIS -- VPSO Building
2012 HEAT DATA
80% of annual load
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Date
VPSO Building Heat Load
Page 32 of 43
Two cordwood stoves and stacks 9,178$
Mechanical / Electrical within biomass building - -$
Integration to existing heating system -$
Subtotal: 9,178$
Overhead -- 7%. No profit (self-performance) 642$
Subtotal 9,820$
Remote factor -- n/a -- labor and parts are readily available -$
Subtotal 9,820$
Design fees, Building permit, miscellaneous expenses -- 15% 1,473$
Contingency -- 15% 1,694$
Total Project Cost 12,988$
VPSO --
BIOMASS HEAT SYSTEM CAPITAL COST
Page 33 of 43
AEA B/C Model
Project Description
Community
Nearest Fuel Community
Region
RE Technology
Project ID
Applicant Name
Project Title
Category
Results
NPV Benefits $13,704
NPV Capital Costs $12,242
B/C Ratio 1.12
NPV Net Benefit $1,461
Performance Unit Value
Displaced Electricity kWh per year -
Displaced Electricity total lifetime kWh -
Displaced Petroleum Fuel gallons per year 1,292
Displaced Petroleum Fuel total lifetime gallons 25,840
Displaced Natural Gas mmBtu per year -
Displaced Natural Gas total lifetime mmBtu -
Avoided CO2 tonnes per year 13
Avoided CO2 total lifetime tonnes 262
Proposed System Unit Value
Capital Costs $12,988$
Project Start year 2014
Project Life years 20
Displaced Electric kWh per year -
Displaced Heat gallons displaced per year 1,034
Displaced Transportation gallons displaced per year -
Renewable Generation O&M $ per kWh
Electric Capacity kW
Electric Capacity Factor %
Heating Capacity Btu/hr 0.058
Heating Capacity Factor %
Base System Unit Value
Diesel Generator O&M $ per kWh 0.075$
Diesel Generation Efficiency kWh per gallon
13.00
Parameters Unit Value
Heating Fuel Premium $ per gallon 1.05$
Transportation Fuel Premium $ per gallon 1.58$
Discount Rate % per year 3%
Crude Oil $ per barrel EIA Mid
Natural Gas $ per mmBtu ISER - Mid
Hydaburg
Hydaburg
Rural
biomass
VPSO Building
Page 34 of 43 VPSO Benefit Cost Analysis, Yrs. 110 VPSO Benefit Cost Analysis, Yrs. 10 20
Page 35 of 43
Page 36 of 43
11.0 PROJECT ANALYSIS: HYDABURG CITY SCHOOL DISTRICT
Page 37 of 43
HDD Oil (gal)*EXISTING ENERGY USE SUMMARY Notes
Jan 835 Gallons, total (space + baseload, 2012)1 28,323
Feb 742 Peak heat demand (MMBTU / day)20.06
Mar 890
Apr 729 BIOMASS BOILER SPECIFICATIONS
May 478 Recommended boiler size -- Chip (MMBTU) 2 1.0
Jun 299 Fuel oil offset per year (gallons) 3 25,491
Jul 247 Biomass fuel offset per year (%) 90%
Aug 190 Biomass per year (tons)326
Sep 319 Fuel oil per year (gal, supplement)2832
Oct 716
Nov 774
Dec 963
TOTAL 7,182 28,323
* AEA Round 6 Application
NOTES
1 AEA Round 6 Application, submitted by Hydaburg City Schools
2
3
Divided total MMBTU per day by 20 hours to estimate peak hourly load
90% of total fuel oil consumption
HEAT LOAD ANALYSIS -- HYDABURG CITY SCHOOLS
2012 HEAT DATA -- Hydaburg Schools
0
5
10
15
20
25
1/1/2012 2/1/2012 3/1/2012 4/1/2012 5/1/2012 6/1/2012 7/1/2012 8/1/2012 9/1/2012 10/1/2012 11/1/2012 12/1/2012
Date
Hydaburg City Schools Heat Load
Page 38 of 43
Containerized wood heating system including wood storage 356,000$
Boiler building foundation and silo foundation 20,000$
Additional mechanical/ electrical within boiler building 52,000$
Distribution and underground piping 75,000$
Integration in Gymnasium 22,900$
Integration in Elementary School 26,000$
Integration in High School 24,700$
Subtotal: 576,600$
15% Overhead & Profit 86,490$
Subtotal 663,090$
30% Remote Factor 198,927$
Subtotal 862,017$
Design Fees, Building Permit, Miscellaneous Expenses -- 15% 129,303$
Contingency 148,698$
Total Project Cost 1,140,017$
Hydaburg City Schools--
BIOMASS HEAT SYSTEM ESTIMATE OF PROBABLE COST
Page 39 of 43
AEA B/C Model
Project Description
Community
Nearest Fuel Community
Region
RE Technology
Project ID
Applicant Name
Project Title
Category
Results
NPV Benefits $1,120,325
NPV Capital Costs $1,106,813
B/C Ratio 1.01
NPV Net Benefit $13,513
Performance Unit Value
Displaced Electricity kWh per year -
Displaced Electricity total lifetime kWh -
Displaced Petroleum Fuel gallons per year 2,632
Displaced Petroleum Fuel total lifetime gallons 565,376
Displaced Natural Gas mmBtu per year -
Displaced Natural Gas total lifetime mmBtu -
Avoided CO2 tonnes per year 27
Avoided CO2 total lifetime tonnes 5,739
Proposed System Unit Value
Capital Costs $1,140,017$
Project Start year 2014
Project Life years 20
Displaced Electric kWh per year -
Displaced Heat gallons displaced per year 25,000
Displaced Transportation gallons displaced per year -
Renewable Generation O&M$ per kWh
Electric Capacity kW
Electric Capacity Factor %
Heating Capacity Btu/hr 1,000,000
Heating Capacity Factor %
Base System Unit Value
Diesel Generator O&M $ per kWh 0.075$
Diesel Generation EfficiencykWh per gallon 13.00
Parameters Unit Value
Heating Fuel Premium $ per gallon 1.05$
Transportation Fuel Premium$ per gallon 1.58$
Discount Rate % per year 3%
Crude Oil $ per barrel EIA Mid
Natural Gas $ per mmBtu ISER - Mid
Hydaburg Schools
Hydaburg
Hydaburg
Rural
biomass
Page 40 of 43 Hydaburg City Schools Benefit Cost Analysis, Yrs. 1 10
Page 41 of 43 Hydaburg City Schools Benefit Cost Analysis, Yrs. 11-20
Page 42 of 43
12.0 HYDABURG MUF BUILDING (IN PLANNING PHASE)
The Hydaburg MUF building is in the planning stage. Neither a project location nor design has been
selected.
This project was considered part of a larger new building construction project. Building costs associated
with the project was attributed to the general new building construction budget, rather than the
biomass project budget. The only costs included in this capital cost list were those that would be
incurred by the biomass heating system but not the oil heating system.
More design information would be needed to accurately assess any payback scenarios. The estimate of
probable cost has been created with a 200,000 btu cordwood boiler and wood storage.
0.2 MMBTU Cordwood boiler and wood storage area 32,711$
Mechanical / Electrical within boiler room 7,700$
Integration to to oil heating system 3,780$
Subtotal: 44,191$
Overhead & Profit -- 15% 6,629$
Subtotal 50,820$
Remote factor -- 30% 15,246$
Subtotal 66,066$
Design fees, building permit, miscellaneous expenses -- 15% 9,910$
Contingency -- 15% 11,396$
Total Project Cost 87,372$
MUF (in planning stage)-- BIOMASS HEAT SYSTEM
ESTIMATE OF PROBABLE COST
Page 43 of 43
11. CONCLUSION
The community of Hydaburg is actively seeking sustainable energy projects to reduce costs and provide
community benefits.
Five projects were evaluated for biomass heat:
Project A: Cordwood heater serving the ANB Hall
Project B: Cordwood stove serving the Boys & Girls Club
Project C: Cordwood stove serving the VPSO building
Project D: Wood chip boiler serving the Hydaburg City School District High School, Elementary
School, and Gymnasium
Project E: Cordwood boiler serving the Hydaburg MUF building (in the planning phase)
Resource assessments indicate local resources could easily supply Projects B & C, both of which are
economically feasible.
At this time, Projects A & D are not economically feasible. If fuel prices change dramatically, the
Hydaburg City School District may want to reevaluate the economic feasibility of the project, since the
benefit cost ratio is around 1.0.
At this time, we recommend taking the following actions to develop biomass heat in Hydaburg:
1. Install wood stoves in the Boys & Girls Club and VPSO buildings and implement recommended
energy efficiency measures (Appendix C).
2. Research biomass heat in a future MUF building (planning phase).
Additionally, we recommend the following steps to improve energy efficiency:
3. Develop a community strategic energy plan based on community priorities, using affordability as
the starting point. Consolidation of the City, Corporation, and Tribe offices may be a preferred
strategy.
4. Conduct energy audits for all priority community buildings, and implement key efficiency
measures. Key measures that are known to have fast paybacks include set-back thermostats,
lighting controls, and lighting upgrades.
5. Develop an energy policy and establish an Energy Conservation Manager position to provide
energy conservation services to all community organizations. Such Managers have been found
to be effective in reducing energy-related building operating costs. This Manager can track
energy related operating costs, help owners make informed decisions about operating
schedules and facility usage, and implement efficiency measures.
6. Pool operator training dollars and professional capacity among community organizations by
sharing (an) Operator(s).
APPENDIX A: SITE PHOTOS
ANB Hall
Figure 1: ANB Hall
Figure 2: Main room
ANB Hall
Figure 4: Daylight basement entry
Figure 3: Olsen HTL-100C oil furnace, 115,000 btu/hr
ANB HALL
Figure 5: Daylight Basement
BOYS AND GIRLS CLUB
Boys & Girls Club
Figure 6: Boys & Girls Club
Figure 7: Boiler room access
Figure 9: Main room
Figure 8: Kitchen
BOYS & GIRLS CLUB
Figure 10: Thermostat
VPSO RESIDENCE
Figure 11: VPSO Residence
Figure 12: Laser 56 heater, 44,000 btu output
HYDABURG CITY SCHOOLS
Figure 14: Totem Park and school buildings, with High School (left), Gymnasium (center, background),
and Elementary School (right)
HIGH SCHOOL
Figure 13: High School
HIGH SCHOOL
Figure 17: Totem Park and school buildings, with High School (left), Gymnasium (center, background),
and Elementary School (right)
HIGH SCHOOL
Figure 16: High School
Figure 18: High school boiler, Weil McClain 976, 550,000 btu
Figure 15: Hot water heater
HIGH SCHOOL
Figure 20: Air handling system
Figure 19: Baseboard
ELEMENTARY SCHOOL
Figure 22: Boilers Weil McClain 878 boilers with 770,000 btu
Figure 21: Air handling system
ELEMENTARY SCHOOL
Figure 23: Indirect hot water heater
Figure 24: Boiler room access
GYMNASIUM
Figure 26: Gymnasium
Figure 25: Burnham V36 fuel oil boilers
GYMNASIUM
Figure 28: Air handler
Figure 27: Domestic hot water
GYMNASIUM
Figure 30: Air handler
Figure 29: Heating system retrofit drawings
GYMNASIUM
Figure 31: Heating system retrofit drawings
Figure 32: Heating system retrofit drawings
APPENDIX B: BUILDINGS NOT SURVEYED
City of Hydaburg CITY HALL
This building has been leaking for at least 15 years. Observations of the interior and exterior of building
reveal extensive water damage. Conversations with City employees suggests the water damage has
severely impacted the integrity of the building structure, to an extent that it would not be suitable for a
20 year investment.
CITY HALL
CITY HALL
(There were no improvements
in this category)
4.5.1 Lighting Measures
(There were no
improvements in this category)
(There were no improvements in this
category)
(There were no improvements in this category)
(There were no improvements in this category)
(There were no improvements in this category)
(There were no improvements in this category)