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~vi •
Arctic Environmental Information
and Da:a Center
707 A Street
Anchorage, Alaska 99501
Attention: Mr. William J. Wilson
Principal Investigator
April ll, 1984
4. 3. l • 2142 • 2 • 2
Subject: Susitna Hydroel~ctric Project
Reservoir and lnstream Temp~rature
and Instream Ice ~odels
Dear Mr. Wilson:
Enclosed is a memorandum from Mr. E.J. Gemperline which outlines the
product ion runs of tbP DYRESM, SNTEMP and I CECAL models which will be
used to respond to ... •equest from FERC. This mem.Jrandum should be
provided to Mr. Voos for his use in developing the required SNTEMP
model production runs necessary to provide the information to FERC.
If you have questions, please ~ontact m~ ~r ~r. Gemperline.
hg
Enc. as noted
cc w/Enc:
t.l652
L. Gilbertson, HE
E. Gemperline, KE
'! yours,
~ Bizer, PhD
Contract Manager
'
UIZA·IMICI SUSI'n#A JOINT VENTlllfE
MEMORANDUM
Aocboraae OATE March 22. 1984 L.OCAT10N
L. PoliYka, W.!. Larson, J. Robinson, J. Thrall ----~~~~~~~~~~~~~~~~i~~·~W~·~C.olemanNUMBER --~~1~-~'-·~'---------------TO
FROM Page 1 of 3
Materia e supplied
SUBJECT _-!.r.s<e~g.)jutsie'-'~sl.lot..seilldL.....Ji~n...__.S...,c...,b"'e'"'d....,.u...,l.-e_..B.._..R..,e..,g~->y .. e._.s..,t.__f...,o......._r_
Supplemental Informat i on of April 12, 1983
FEiC, on April 12,
simulations of the
simulations of river
are attached hereto.
1983, requested information on DYRESM /HEA!SIM
reservoir and stream temperatures and ICESIM
ice processes. These requests and our responses
The requests and o ur responses c all for a large amount of information
to be compiled and transmitted to FERC. Basically we have promised:
1. Results of calibration of DYRESM , SNTEMP, and ICECAL, and
2. Production runs of 'c.'eekly longitudinal temperature profiles
for wet, dry and ~ve rage years and for various power
operation schemes.
The purpose of this memorandum is to outline how we intend to complete
o~r response to these r eq uests.
Calibrat ion
DYRESM and IC ECAL c alibration stud ie s have been comp le ted and the
reports have been f i nalized. These wil l be transm i tted to FERC as soon
aa they are printed. The SNTEMP model was documented in "Stream Flow
and Temperature Model in& in the Susitna Basin, Aiaska" by AEIDC and
this has been transmitted to FEiC.
Product i on Runs
The follovin& matrix represents the 23 cases whi c h would be simulated
···th reservflir (DYRESM) and stream temperature models (SNTEMP ) and the
instreaa ice model (ICECAL).
420193 1
'
11174· PAlCO SUSintA JOINT VENTUIIE
MEMORANDUM
L.OCATION Aac:horaae DATE Harc:h 22, 1984
L. Polivka, W.!. Laraoa, J. iobioaoa, J. Thrall
TO J. Biser 8.8. Wang, C.Y. Wei, H.W. ColeaanNUMBEA
FROM !.J. Gemperlioe Page 2 of 3
Material to be supplied to FERC aa
suEUECT --~r~e~q~u~e~s~t~e~d~L~·n~S~c~h~e~d~u~1~e~B~R~e~q~u~e~s~t~~ro~r 7 Supplemental Information of April 12, 1983
... • • c
~ c 0 >-. --........ ..-.... ~."' 1113 ... 0\
... Ill 0\
-~ "'--~-"-00 ......
.....
0 >-
... c c
• 0 0
~ ....
>-Ill ... = .. .... " ... Ill .... ~
" ~ Q, ...130
c
0 ... >-.. c c
Cl .. 0 >-u .... ... .... -. ~ ·-... ... > ~
·-~ Q, "-CO
Dry year (1974)
Wet year (1 982)
Avg. year
Average winter (1983) I
Warm winter (197&-77) I
Cold w1nter (1 971-72) I
For each of these cases the following in format io n must be supplied to
FERC:
1. Listings of i nputs used and assumptions mad e fo r ~ach
simulat ion,
2. Meteorological conditione used as model parameters,
3. Parameter values uaed in each simulation and sourc e of
valuea,
4.
5.
A chart ahovins reservoir outflow
c:o.pariaoa with pre-dam temperatures
reapective dam site (a), and
temperature• and a
10 the river at th e
Loasitudiaal
predicted if
temperatures
profiles of natural (measured if available ,
not) aad with project predicted weekly average
dovuatream of the pro j ect s).
Since production runs are nov begining the following guidelines a r e
suggested to allow o rder l y preparation of this response :
l.
2.
420193
Thorough l.y document runs of DY RESH, SNTI:.~P and IC ECAL as chey
are made,
Label input data files so that meteorologic and hydrologic
data are clearly marKed, and
2
'
&I_IZA•IMICf SUSI'nU. JOINT VENTUifE
MEMORANDUM
L.OCATIOH Ancbor!J! DATE March 22, 1984
L. PoliYka, W.E. Laraoa, J. Robinaoa, J. Thrall
TO J. Bizer B.B. Wana. C.Y. We i , H.W. ColemanNuM8£R
FROM E.J. Gemperline Page 3 of 3
SUBJECT
Material to be supplied to FERC aa
requested in Schedule B Request for
Supplemental Information of April 12, 1983
3. Prepare the requested material for each run as it ia made.
In order to limit the number of exhibit• required to show the weekly
locgitudinal temperature profiles it is sugested that they be grouped
by month. Thus each chart will show four or five simulated weekly with
project temperature profiles and the co rresponding number of measured
(or simulated if measurements are unava il able ) natural (pre-project)
temperature profiles.
As the requested material for each run becomes avai l able it should be
thoroughly reviewed and transmitted to Harza-Ebasco.
It is recognized that close c oordinati o n is required between the
reservoir temperature, stream temperature and in stream tce studies.
This 1s prov i ded in the following mann~r.
1. Reservoir ou tflows and temperatures a re si ~ulated with DYRESM
in Chicago and an output fi l e ts transmitted to AE IDC's
account at Boeing in Seatt le,
2. AEIDC generate• stream temperature us in g SNT EMP and provides
output on the location of the freez i ng point isotherm i n the
river to the ice study , and
3. Ice proce•••• are aimulat e d in Chicago and the output
tranamitted to AEIDC for use in their analyses of i mpacts.
Tbe location of the ice front leading edge provides the
upatreaa boundary of the open water temperature simulation
durin& break-up or melt-out.
The open water temperature profiles generated by AEIDC wi ll be modif i ed
1n the follow i ng manner.
1. During the freeze-up period the profiles will be truncated
where the water t~mperature reacnes the free~ing point
2 .
420193
During the break-up or melt-out period t he pro fi le• wi ll be
truncated at the location of the l eading edge of the ic e.
3
EXHIBIT E
2. W~ter Use and Quality
Comment 28 (p. E-2-87, para. 1)
Provide longitudinal orofiles of predicted weekly average temperatures oown-
stream of ~at ana Dam and Devi 1 Canyon/Watana using the DYRSEM and HEATSIM
models. Simulations for stations with pre-project temperatu·e data snould
be provided with Watana in operation and Devil Canyon/Watana in operation
using data for an average water year and for conditions of minirnum releases
(i.e., using data for a minimum flow year) from Watana and from Devil
Canyon. istings of inputs used and assumptions made in !ach simulation
should also be provided. O u~flow temperature from each reiervoir used i rr
the HEATSIM model should include the temperatures that would have to be
available at the multilevel intakes i n order to match pre-cam temperatures
that would have to be avai l abl~ at the 11ultilevel intakes in order to match
pre-dam temperat ures. M'=t eorologica l conditions used as m)del oanmete,.s
sr1ould be pro'lided. in ese si ;r u13ted average .t~eekly tempera::ures snou l d oe
com oared to ore-oroject :emoeratures rr eas :.;red du ring l ow-flow and average
f l ow years. ?r o\ioe parameter vc iu es JSed i n ~acn si ;n u l at i!:n and aocurrer.t
~ne source of tne values used.
Resoonse:
Daily simulations of reservoir and river temperatures had bet!n prepared to
provide the longitudinal profiles of temperatures downstream of ;latana oam
and Watana/Devil Canyon using the DYRESM and HEAiSIM mo dels for a wet year
(1981) condition (Acres Mlerican Inc., 1933a, .983b). Selected profiles
from the daily simulations are given as Figures 8.44 to 8.56 (attached ) in
..l.c res .983b. =-igu res S . .l4 tnr:JUg n 3.56 (see ::iages 2-23-6 to 2-23-lS)cc,.-
respond to Figu res E.2 .l7 6 t hr::>ugh E.2.178 , ::.2 .130 tnrough E.2.1 33, and
:.2.217 through E.2.2 22 of Exn i oit t, Cha pter 2 o f ~n e li cens~ doc u~ent.
2-28-1
To provide average weekly temper~tures, for comparisons wHh pre-project
temperatures during low-flow and average flow years, ad~itional studies will
be conducted in 1983. A work plan to carry out the studies and to prov id e
the updated parameter values and their sources is presented as follows:
1. The parameter values of OYR£SM used (in Acres 1983a) will be updated
through additional calibration using Eklutna Lake data, including jata
collected after January 1, 1983. This calibrtion effort will be com-
pleted by January 1, 1984.
2. Water temperature profiles downstream from Watana will be determined by
SNTEMP model.Y (Stream Network T~mperature Model). The calibrati on
of SNTEMP will be made using existing streamflow, stream temperat:;re,
and meteorological data.
3. The reservoir temperature profiles will be aetermined using tne OYRESM
mod el and the updated oanme!er values. Outflow t e"l'peratures from ~ e
reservoir temoerature rrodel will oe used as in puts fo r the Sr.E:-I P -oa el
to provide longituain a l Drof i l es of t::mperatures downstrea:n from tn e
reservoir. Thi s study ~i ll be :J ~~l eted by ~un e 30 , 1984.
~eekly s imulat ion s will be made for c~~oar i son ~i th ore-pro j ect t:moerat~res
measured during low-flow and average f 1ow years fo r tne foll ow in g cases :
l/AEIDC will perform river temp erature stud i es using SNTEMP mode l.
2-23 -2
'
(a) Filling of Watana reservoir
(b) Watana in operation
(c) Watana/Devil Canyon in ooeration
~lthough not soecifically requested case (a ), filling of Watana Reservoir i s
included because the cited paragraph (E-2-87, para. 1) is in the section
entitled "Impoundment of Watana Reservoir•.
Weekly simu l ations of the reservoir thermal behavior will be performed under
various power operation schemes for low-flow, average-flow, and high-flow
(1981) years. The resulting outflow temoeratures at the 1111ltilevel intak~s.
will be used as inputs to the jownstream temperature simulations using tn!"
SNTEMP model.
Th e co :n outed te11oeratures wi 11 be como ared with the measured pre-project
temoerltures. Results of the 1933 Study (A cres 1983b) for wet year
co ndit ions Nill a l so oe verif i ed .
7ne representative yeari for ow -f.ow (~ry ), av erage-flow {average ), and
high-f l ow (w et) years conditions are se l ected cased on the avai labl e s:r!:~
flow aata. From a frequency analysis of annual f l ow vo lum es at Gold Cr eeK,
water years 1974, 1982 and 1981 may be consiaered as dry, average, and Net
years, respectively.
At the completion of the study, a surrmary report will be prepared. The
report will include:
(a) A listing of inputs used i n tne st uay .
2-23-3
'
(b) The assumptions made in eac~ simulation.
(c) The parameter values used in each simulation and documentation of
their sources.
(d ) Tn e outf ow ~e mo erat ur es from each reservoir.
(e) A comparison of si mulated average weekly temperatures with .easured
pre-project temperatures.
Outflow temperatures wi 11 include the temperatures that would have to be
available at the multilevel ·ntakes i n order to match pre-dam temperatures.
The study will be c o pleted by June 30, 1984.
The parameter values used for the 1983 reservoir thermal simu lat i ons are
given in the following table:
PAR'"l:: ER
:onvective overturn, CK
:·:ech anica l stir ·ng, ::A
7emporal effects, CT
Shear production, CS
Diffusion constant
W = Wedderburn number
W > 1 {for general condition)
W ~1 (for high wind condition)
Drag coefficients
These oarameters values ~ere aeri ed f rom c ~l i ~r~t ·an of
::klu tna ake (A cres 1983b).
2-29-4
. 25
l. ~ 30
.:.o
0 .2 0
. 48
.096
. 15
e
I
References
Acres American Incorporated, "Susitna Hydroelectric Project, License Appli-
cation, Volumes SA, and 58," prepared for Alaska Power Authority,
1983 ( (1 ).
Acres Anlerican ncorporated, "S usitna Hydroelectric Project Feasib;l i ty
Reoort -Supplement, Chapter 8: Reservoir and River Temperature
Studies," preoared for Alaska Power Authority, l983(b).
2 -29 -::>
EXHIBIT E
2. Water Use and Quality
:011111ent 40 {p. £-2-121, oara. 5, fig. £.2.1 79)
Provide parameter va l ues used i n the DYRESM/HEATSIM s 1mula tion of riv er t em-
peratures in Fig. E.2.179 and document the source of parameter values used.
Response
The parameter va l ues used in the DYRESM simulation of reservoir temperatures
can be found i n the "Susitna Hydroelectric Project, Feasibility Report -
Supplement" {Acres, 1983) and are given in Tab le 1.
Table 1
OYR ESM Par1meters for ~atana Reservoir
PARAMETER VALUE
Convective overturn, CK 0.125
Mechanical stirring, ETA
Temporal effects, CT
Shear production, CS
Shear instability, AKH
Diffusion constant
W • Wedderburn number
W > 1 (general condition)
W ~ 1 {high wind condition)
Drag Coefficients
1.~30
0. 51 0
0.200
0 .300
0.048
0.096
0.015
These parameter values were determined tnrough the calibration of the ov ~:SM
model us ing £k lu tna ake data {~&M Con s ul tants 1982).
The parameter va l ues used in HEATSIM are aocumented i n the "Sus i tna 'iy dro-
~lectr : ... p,·oject, Feasibility Report -Volu me 4, Appendix A-Hyaro log i c a l
Studies, Final Dr aft" {Acres, 1982) and are shown i n Table 2.
2-40-1
Table 2 .
HEATSIM Parameters for Susitna River
PAAAME ER
I nsolation Coefficient
Emissivity Coefficient
Albedo for Water
Ratio of bright sunshine to maximum possible sunsnine
VAL UE
0. 97
0.97
0.10
Clear Days 0.9
Partly Cloudy Days 0.5
Cloudy Days 0.2
Long term c l imatic recoras at Ta l keetna and Surrmit stations, operated by
NOAA, were used as inputs i n the analysis. The principal climatic pa-
rameters used were: average daily air temperature, rat i o of recorded sun-
shine to maximum possib l e sunshine, wind speed, precip i tation, barometric
pressure, and relative humid i ty. Ai r temperature and the sunsh i ne rat i o
were the two most i mportant parameters of tn i s Clata set.
However, as stated in the response to !'later Qua li ty Question No. 28, tne
Eklutna Lake study will be updated using tne addit i onal data ava il ab l e af ter
January 1, 1983, and the SNTEMP mode 1 (Stream ~etwork Temperature Moae 1)
will be used for the river temperature studies. Therefore, ref i ned para-
meter values in the IIIOdels and documentation of the source of parameter
values used wil1 be presented at the completion of a study outlined in the
work plan.
2-40-2
EXHIBIT E
2. Water Use and Quality
Ca.~Rftt 41 (p. E-2-124-p•rl. 2)
Prev i ae ao cument3t ion fo r rc :SIM mode l . Prov ide validation of ~::sr~ moa e l
oy comparing model predictions wi th i ce observations on the Susitna ~iver.
Response
Documentation for ICESIM is not ava i lable because the model is proprietary.
nowever, as part of the on-going env i ronmental stud i es, a comprehens i ve ice
simulation model will be emp l oyed to verify resu l ts given in the
application. This :nodel will be fully available for documentation and wnl
be ver if i ed for pre-project winter f i ow regimes on the Susitna, and, i f
suff icir•t: i nformat ion can be obta ·ned, for other rivers with wi11 ter flow
regimes s i milar to the post-project cond i tions.
Tne proposed work plan for the ic e simulation mode ing i s giv e n be l ow :
~ork ? l an
The proposed work plan will be accomp li shed i n three steps: mode l vert ifi -
cation, preliminary studies, and final studies.
Model Verification: A state-of-the-art mathematical model wi 11 oe used to
estimate ice production and ice cover progress i on and thickening . The
mathematical model wi l l first be caliorated wit h i ce observation data on the
Susitna River. In previous studies us i ng IC ES I M, it became apparent t hat
the model c ould not simulate the ic e regime at numerous cross sections . ..,nere
critical or near critic a l ve l ocit ·es occur in the riv er during ow f l ow
2-·H -1
conditions. However, s i nce the po~t-project winter d i scharge wi 11 be s i g-
nifi cantly h i gher than pre-project tfinter flows, th i s verif i cat i on to the
avai table ice observation data would be useful only to demonstrate tne
accuracy of the mode 1 for extreme l ow wi nter releases. Therefo r e. o t he r
rivers with hi gher wi nter f l ow r ates and stages wi l l be c ons i d ered i f
suff i cient d ata can be obta i ned .
Pre li mi nary Stud i es : Prev i ous st ud i es wi ll be rev i ewed with an assess:ne nt
of neces s ary changes to the scope of work. These studies wi 11 proceed as
fol l ows :
a. Review reservoir d i scharge quantity and t emperature presented i n
the Li cense App lic at i on f or compar i son wit h results from the most
recent stud i es. Also c ompare open-river water profi l es presented -
in the Li cense App li cat i on with the latest available res u l t s.
b. Use av ~'l ~b l e o pen-w4ter surface and temperature profi l es t o pro-
ceed wi th pre li minary ic e-model r uns. Compare res ul ts to r un s
c ommon to bot h Li cense Ap p lic at i on l eve l stud i es and cu r r ent
stud i es. The ic e mode l wi 11 i nc l ude an ope n -wate r temperat u re
a i gorit nm wh ic h will be used to determ in e both the temoor a l an d
spat i a l di str i bution of i ce product i on . Wh en t he r i v e r tem per a-
ture profiles from the i nstream temperat ure mode lin g u s 1ng the
SNTEMP model are ava il ab l e (see r esponse to Coownen t J Q ), th e
starting location and t i ming of i ce produc t ion may be ad j u sted.
c. Review the adequacy of Li cense Appl i cat i on i ce s i mul at ion ru ns
especially in view of the J i fficulty i n ca l i orat i ng the mode l .
d. Rev i ew the adequacy of lim it i rg hydra u li c an d ·c e s t ud i es to the
reach upstream of Ta l keetna.
2 -·U -2
e. Review the adequacy of assumpt i ons made with regard to tr i butar i es
of the Susitna River between Watana dam s i te and Talkeetna.
F i nal Stud i !s : r ollowing verificat i on of the model and pre l im i nary r uns,
f i na l r uns will commence. Fi na l runs •i ll reQuire temperature outJut data
at Watana and Dev i 1 Canyon f rom th e reservo i r operat i on and reservo i r temp-
erat ure mode l s and water profi l e da t a from the r i ver hydrau l i c moae l .
Resu l ts of 1nstream temperat ure mode l ing us i ng SNTEMP model wi 11 be c ons i d -
ered and adjustment of the location of ic e product i on may be reQuired.
Typical production runs wou ld i nc l ude t he fo ll ow i ng :
a . Open-wa t er surface and temperat ure prof il es downstream from the
dam( s), for var i ous power d i scharge hydrographs and for average
and extreme win ter weather conditions. These runs wi 11 estimate
the i n iti a l lo ca t ~o n and t im ing of i ce product io n in tne r i ver for
the study cond t ;~n~ descr i bed.
b. Ice deve l opmen t ru ns fo r the ti me and ocat i on of i ce product i on
downstream fr om t he dam (s ) duri ng the winter, i ncluding i ce th i c k-
en i ng, area l ex t ent, "stag 1n g ," and ce-c over break-J p.
The expected sc hedu l e for complet i on of tn e new s t ud i es i s as f o ll ows:
Model Verif i cation
Preliminary Runs
F ina 1 Runs
~ec . 1983
Mar. 1984
J une 1984
All documentation, model verif i cation, and study r esu lt s wi 11 be s upp l i ed as
they become avai l able.
2-4 1-3
•
•
•
-"-•' .... ~01 ·,
Arctic ~nvironmental Information
and Data Cent<!r
University of Alaska
707 A Street
Anchorage, Alaska 99501
Attention: Mr. William J. ~ilson
Principal Investigator
Subject: Susitna Hydroelectric Proj~ct
Evaluation of Impacts on Aquatic
Resources due to Changes in
Ice Processes
Dear Mr. Wilson:
April 10, 1984
4.3.1.2/42.2.5
T EL t9 0 71 2 2 5585
We have read your letter of Mar c h 12, 1984 .tnd agree that a concerted
effort utilizing perscnnel from ADF&C St ;Hydro, Harza-Ebasco, R&M Con-
su cants, E. Woody Trihey and Associa r es and AEIDC will Ge required to
accomplish the subject evaluation. We oelieve that AEIDC should take
the lead in this assessment and we suggest the approach to the scudy
o utlined in Encl o sure ! would most efficiently uti l ize the availab l e
resources.
we do not oelieve the memorandum called fot in Encl.:>sure 1 should be a
lengthy document. We prefer that it contain concise definitions o f
impacts and brief explanations of how these impacts can be addressed.
The finalized memorandum will guide future ice studies and will be ver y
useful to the instream ice processes simulation study being carried out
in Chicago. We anticipate that the physical processes which wou l d
result in impacts to aquatic resources will be discussed in the Harza-
Ebasco report documenting our inst ream ice study. AEIDC aod other
Aquatic Study Team Members identified in the memorandum would evaluate
the impacts of the ice processes on aquatic resour c es. The fina 1
report would be prepared by AEIDC f o r the Harza-Ebasco Susitna Joint
Venture and reviewed by the Aquatic Study Team.
We have also enclosed the following material to -:ssist Ln the devel o p-
ment of the ~emorandum :
Enc l osure 2 -.-\las ka Power Authority "Susirna Hydroelectric
?r.:>j ect-Issues L ist" Mar:h 6, 1984
Enclosure 3 -Harza-Ebasco interoffice memorandum from E.J.
Gemperline to H.W. Coleman on Presentation of
results from Instream Ice Simulation Model, ~arch
12 ' 1984.
Mr. Williaa J. Wilson
April 10, 1984
Paae 2
We would appreciate your c omments on this methodology and we look f o r-
ward to meeting with you to discuss them at the ~arliest opportunity.
hg
Enc : as noted
cc w/ Enc :
!.2020 3
J. Th r a 11 , HE
E. Woody Trihey, EWT
W. Oyok, HE
E. Gemperline, HE
T. Trent, ADF&G
S. Bredthauer, R&M
H. Coleman, HE
V~ry tr uly you~s,
Larry Gilbertson
Aquatic Gr oup Leader
Suggested Approach for
Evaluation of Ice-Related I•pacts
To Aquatic Resource•
A. AEIDC would prepare a comprehensive list of potential ice-related
impacts to aquatic resources with concise explantions. For each c f the
issues AEIDC would propose a method of analysis.
We suggest that this 1 ist of potential impacts be drawn frca the
following documents:
1. Alaaka Paver Authority, "Application for License for Major
Project, Susitna Hydroelectric Project" Exhibit E, Vol 5A, Chapter
2, Vols. lOA and lOB, Chapter 11, February 1983.
2. Alaska Power Authority, "Susitna Hydroelectric Project -Isaues
List", March 6, 1984.
3. Alaska Power Authority, "Application for License of Major Project,
Susitna Hydroelectric Project, Responses to Agency Comment!: on
License App ~ication" January 19, 1984 and Vol s . I and II, February
15, 1984.
4. AEIDC, "Methodological Approach to Quantitative Impact AssesslDent
For The Propoaed Susitna Hydroelectric Project", for the Alaska
Power Authority, March 12, 1983.
5. R&H Consultants Inc., "1982-1983 Susitna River Ice St u dy", for
the Alaska Power Authority, January, 1984
6.
420203
R&H Consultants Inc.,
82 Ice Observations
December , 1982.
"Susitna Hydroelectric Pr oj ect Winter 1981-
Report", for the Alaska Power Authority ,
•
•
•
7. R&M Consultants Inc., "Susitna Hydroelectric Project Ice
Obeervationl 1980-81", for the Alaska Power Authority, August,
1981.
Other documents may also provide information but we believe t h at a
review o f these should suff i ce t o generate a c omprehensive i mpacts
1 i s t.
AEIDC should draw on the experience of the Aquatic Study Team when
proposing methods of analyses.
AEIDC should consider:
In compi 1 ing the methods of ana lyses
1. The capabilities and limitations of the !CECAL model as documented
1n Harza Ebasco Susitna Joint Venture, "Susitna Hydroelectric
Project-Instream Ice, Calibration of Computer Model" draft report
for the Alaska Power Authority, January, 1984.
2 • n ... ~ !CECAL runs which have been req a ested by FERC identified in
t ta e follo'=ting matrix:
~
l1i 4 ~ ~~ ~~ )~-t ~~ ~ 1 ~, ·~ ~ ~ ~ ~ ~ ~~ ~{ '~ t .)~ ( ~ ~ t ~ ~~ "' ., ~1 ~]o ~~ () ~~
Wet Year (1981-82)
Dry Year (1974)
Avg. Year and
Ava. Winter Teme (1982-83)
Cold Winter Temp. (1971-i2) NA
Warm Winter Temp • (1976-77) NA
420203 2
E. Woody Trihey and Wayne Dyok have also identified aeveral other
ruaa which would provide e~treme conditions as followa:
a. cold winter and low flows (1971-72) to give maximum upstream
progression of the ice front.
b. warm winter (1976-77) and synti1esized outflows from reservoir
to determine m1n1mum progression of leading edge under
possible maximum weekly flows
c. cold winter (1971-72) and very low flow (1979 drought) to
determine extreme maximum upstream progression of ice
3. The proposed method for analyzing ice stageing impacta on slougha
documented in the attached memorandum from E.J. Gemperline to B.W.
Coleman and discussed with AEtDC and ADF&G.
B. Upon completion cf this draft memorandum it would be transmitted to the
Ice Study Team ~o~ review.
C. tee Study Team members would transmit review comments to AEtDC
D. AEtDC would prepare a revised draft memorandum which would be
transmitted to tee Study Team members for final review.
E. A meeting of the tee Study Team would be held to finalize the
memorandum and to define the list of potential issues and method of
analyaea.
420203 3
Fisherv Iss~es (F)
Alaska Power Authority
Susitna Bydr~ele~tri~ Proje~t
Iuuu List
!'tuch 6, 1984
F-1. Significance of ~ltered flow resime on salmon and resident fish
h~bitats and populations downstream of the dams, including effects on
miJration/access, spawniaa, and rearina durin& summer months, and
effects oa incubation and rearina durin& winter montbe.
F-2. Si10ificance of chana•• in water quality paraaetere (turbidity. pB,
heavy metals, diuol ved nitrogen, temperature, nutrients) on ealmoo
aDd resident fish habitat• and population• dowostreaa of the daat.
F-3. Si10ificance of altered ice pro~euu on salmon and resident fish
habitats and populations downstream of the dams, includina effectl on_
fish acces1 and changes due to ttaaina.
F-4. Si10ificanc:e of changes in stream morpholo11 on salmon and resident
fish habitats and populations dovastream of the dame.
F-5. Si10ificance of impo~~ment effects on retident fish habi tat and
populations upstreua of the dnas.
F-6. Significance of physical effects of access corridor• on fish
h~bitats.
F-7. Significance of physical effects of tr~nsmission line corridors on
fish habitats.
F-8. Significance of water quality and quantity effects of construction
camp and pe~nent villaae on fisb habitats.
F-9. SiiDificance of water quality and stream morpholosy effects of borrow
aad 1poil area• on fith habitats.
F-10. SiiDificanc:e of disturbance effects of human instream activities on
fiab.
F-11. Feaaibility and detirability of specific: ~t11ation options, includins
structural modification•, flow allocation, physical habit~t
modification, hatcberiet, and management options.
F-12. Forllulation and i:Dplementation of post-construction plan to monitor
signifi:ant impacts and the efficacy of specific: mitigation measures.
40836
•
•
•
Wildlife I11ue1 (W)
w-1. Sipifieance of reduction ia moon carryina capacity directly
attributable to the project.
w-2. Sianificance of reduct i on in black bear dennina and foraRina h abitat.
W-3. Significance of reduction in browu bear sprina foragina ha b itat.
W-4. Sianificance of habitat reduction for middle basin furbearers and
birds.
w-5. Siaaificance of Dall sheep habitat modification at Jay Creek lick.
w-6. Sipificance of increase in accidents and inbi bit ion of movements of
bia aame mAmmals due to reservoir open water and ice conditions.
w-7. Sipificance of inundation or other disturbance to bald ••ale, aolden
eaale, and other raptor nests.
w-8. Sipific:ance of change• in wildlife habitat and movements downstream _
of the da~ due to changes in flow and ice cover.
W-9. Sipifi c:ance of reduc: t ion in vi ldli fe habitat due to cons true: tioa
camps/villages, pe~nent tovn, and airstrips •
w-10. Sipificaace of accesa road p resence and uae effects oa caribou
movements and behavior.
w-11. Significance of increased accidental bia game deaths from vehicle
collisions due to increased access.
~-ll. Significance of reductions in big game and furbearer populations from
increased hunting/trappina pressure due to increased accessibility of
project area.
~-13. Siauificaac:e of other disturbances to vi ldlife due to human
ac:tivities, auc:h aa aircraft overflights and c:onltruc:tion noise.
W-14. Forwulatioa and implementation of construction worker transportation
plan.
W-15. Foraulation and implementation of post-construction access policy.
W-16. Fu1ibility and duirability of refinement of timina of construc:tion
and operation ac:civitiel to reduce wildlife impacts.
W-17. Feasibility and desirability of specific mitigation options, including
moose and bear habitat enhancement , Jay Creek lick expansion, raptor
nest habitat enhancement, revegetation of disturbed areas, downstream
beaver habitat enhancement.
40836 2
w-11. raaaibility and deairability of typea of ~itiaation optiont, iaeludina
deai,a G~ ttructural modification•, replae~ent landa/babitat,
enbaac .. ent ol lands/habitat, rehabilitatioa of ditturbed laadt,
~•n•a .. ent optiona (acbedulina or rettrie~ions) to reduce disturbance
or direct iapacta, preventive ~•asuret.
w-19. Fonaulation and illlplnentation of post-construction plan to monitor
sianificant impacts and the efficacy of specific ~itiaatiou aaeaaures.
Recreation Issues (1)
R-1. Sipificance of impact• on fithin&, includina availability of fish,
accesa, and quality of experience.
R-2. Sipificance of impacts
ineludinc availability
experience.
oa huatiaa and recreational trappiaa,
of resource, aceesa, and quality of
R-3. Siaaificaace of losa of whitewater resource.
R-4. Siaaificaace of iapacts to boatina dovust-rea~ of Devil Canyon Daa,
includiaa aecesa to the water aad on tbe water (iapediaeata to
naviaatioa).
R-S. Siaaificaace of iapacts oa non-consumptive activitiea (e.,., bird-
watch in& and hikiaa), includinc availability of the reaource, aceeaa
to tbe reaource, aDd quality of experience.
R-6. Sianificance of -recreational activities of project conatructioa work-
ers oa fisb and wildlife resources in the Sutitna River watershed.
R-7. Formulation and implementation of a specific
opportunities/recreation plan.
R-8. Featibility aad deairability of restrictions of
opportunitiea in order to reduce impacts to fish
retources ia tbe Suaitaa liver watershed.
Aettbetic Iaauea (AI)
rec-reational
recreational
aad wildlife
AE-1. Siraificance of Lapacta of borrow and spo il areaa, trantaissioa lines,
acceaa road• and rail lines, construction campa aad villaaes, aad dams
oa acenic reaources.
AE-2. Faaaibility aad desirability of incorporatin& specific aesthetic
~itiaation measures into project plans.
40836 3
. ,
Cultural leaource Issues (C) .
c-1. Ueotificatioo anli siJilificanc:e of lou of affected cultunl/
historical sites.
c-2. For.ulation and impleMentation of cultural resources mitiaat i on pl~n .
Air Quality Issues (AQ)
AQ-1. Sianificance of ambient ~1r quality i:p~cts dur i n& pro j ect
construction.
AQ-2. Formulation ~nd implementation of air quality mitiaation measures.
D .. Safety Issues (D)
D-1. Determination of siroificance of risk and effects of catastrophic daa
failure.
D-2. Formulation of emer1ency warnina plan.
Socioecoaoaic Issues (S)
s-1. Siroificaac:e of changes io subsistence opportunities relatin& to fisb
and wildlifE resources io tbe Susitna liver watershed.
s ~2. Siroificance of project impacts ou life styl& in area communities •
S-3. Siroificance of chanaes in commercial opportunities related to
fisbina, huntina, trappina, etc.
S-4. Siroificance of ch~nges in employment in ~rea communities.
S-5. Siroificance of increased burden on Mat-Su Borough and affected
c~uaitiu for providina public: services and facilities in response
to project-related demands.
S-6. Siroificance of secondary development impacts on Native corporation
undeYeloped lands.
s-7. Feaaibility and desirability of specific m1t11atioa options, includina
worker traasportation plan, worker housina plaa, local aid plan, local
hire plan.
S-8. Foraulatioo aad implementation of a constructioo and post-construction
plaa to moaitor siroificaat impacts and the efficacy of specific
mitiration measures.
Land Acauisition Issues (~)
L-1. Development of a feasi~le and ~esirable land acquisition ?rogram.
~0836 4
•
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I
ffP~RlP.. £[)AS(;(} SUSITNA JOINT VENTURE
MEMORANDUM
Anchoraae March 12, 1984
LOCATION ------------------------------------~----DATt --------------------------
TO
FROM
H.W.
Nl:IMBER
E.J. Page 1
Based on my conversation with Wayne Dyok, represtativee of AEIDC and
ADF&G, I recommend that result• of the ice simulation studiee be
presented in the manner and at location• described below.
Manner of Presentation
It appears that the most useful manner of presenting the results would
be a plot of the time history of stage at significant locations. A.a
shown in Figure 1.
jt-Ice Cov•ret;/ ---..J
/,'"~
It is suggested that this plot can be generated in the following
manner:
A. For important habitat locations which are between two cross-
sections in the ice model and for which an open water rating
curve (see data from ADF&G) exists:
420162
1. Compute the ice induced staging at both upstream and
downstream cross sections and linearly interpolate to
estimate the staging at the significant location.
2. Add this staging to the open water rating for the given
discharge at the significant location to determine the
water surface elevation at the significant location.
3. Plot the water surface computed in 2. above as a
function of time.
1 •
Alternate 2
If for hydraulic reasons, it is not considered
appropriate to interpolate staging between cross
sections -then based on judgement estimate the staging
..
,
' ~ARZt. • ra.t~s co SUSITNA JOINT VENTURE
MEMORANDUM
Anchor•&• March 12. 1984
LOCATION DATE -----------------------------
TO H.W. Coleman
NUMIIE ..
FROM !.J. Ceruperline Paae 2
SUBJECT Presentation of results from Instream
Ice S1mulat1on Hodel
·.
at the significant location to be equal to the stagina
at either the upstream or downstream cross sectioa.
2-3 Continue as in Alternate 1 steps 2 and l.
Alternate 3
1. Linearly interpolate the staged water surface elevations
at cross sections upstream and downstrea• of the
significant location to obtain the water surface
elevation at the significant location
2 . A J,~st the water surface elevation obtained in 1. above
~; t he difference between the computed and observed open
~atcr surface elevations.
3. Plot the water surface computed in 2.
function of time, or plot the water surface
1. above and provide an adjustment factor.
above as a
computed 1n
B. For important habitat locations which are at a cross section
in the model simply plot the time history of water surface
elevation at the location.
C. For important habitat locations which are not at a cross
section in the model and for whicb a rating curve does not
exist estimate the water surface at the significant
location by linearly interpolating between the nearest
upstream and downstream cross sections and plot this time
history of water surface elevation.
Superimpose on the plots the control elevation for the significant
location if this is known or the open water surface elevation
corresponding to the berm overtopping flow if this is known.
It ~o~ould also be
temper atures at
temp erature ~o~i 11
Addi tional data
/.'lnt L1
useful to add information on these plots to show water
the given locations. This should be simple since
be at the freezing point for most of the period.
which should be plotted include:
..
ffflRlf!. • Ea~sco SUSITNA .JO I NT VENTURE
MEMORANDUM
Anchoraae March 12, 1984
LOCATION ------------------------------------------OATE
II.W. Cole .. aa
TO N\JMBE ..
FROM
E.J. Cemperline Page 3
SUBJECT
Presentation of result• fro .. Inatream
Ice Stmulat1on Hodel
1. The time history of progression of the ice front.
2. The profile of the stream showina the maximum water
surface attained and the ice thicknesa.
Significant Locations
Based on analyses carried out by W. Dyok the sloughs which we believe
it would be most beneficial to present resulta for are denoted 11
21, 8A, 9, 8 and 9A. Sufficient hydraulic information is available for
these sloughs to allow a quantitive estimate of ice related impacts due
to benD overtopping • Whis.kers Slough, Slough 20 and Slough 22 are not
nearly as produ ct ive all !"h ~ above 6 sloughs, but since sufficient
infortuatioa is availa ~. ~ •• we could present resulta for these
locations.
Results can also be presented for the side channels shown in Attachment
2 since sufficient data are available.
Storage of Resulta
Result• of all final !CECAL runs should be saved oa tape so that
additional analyses of results can be made at a later date.
In addition, FERC haa shown a tendency to request input and output
files of PHF runs. It would be prudent, therefore, to save input and
output files and to label them in such a manner that FERC does not ask
us a lot of questions.
Please also discuss this last point with C.Y. ~ei regardina his DYRESH
runs.
•
..
Attachme nt 1
.. l'hysieal . Dsta tlccdcd for I111pact St udiee
Sloll&h•
LEGEND
X -de-note• data r c qucs ted be provid e d ~:y ADF&C
ia · -·denote• data 10~ich we understand w.J:; 111..1 t ubt.:~iued and 1s not
avai table
If .:~ny ·hta marked NA is available please supply this also
Location ~~a instera Mains tea Bena
(river ,.,. .. ff Contro} Cross Crose Overt»pina
Slough Mile) 1/ :l ~/ El ev 1 Section !I Section Flow
Sll 136.4 136.2H2 X LRX-44 X 40,000-42,000
S21 142.2 142.1Ml X LRX-56 X 26,000
SSA 126.1 125.3M3 X LRX-29 X 26,000
S8A 127.1 125.3f-!6 X LRX-29 X 30,000
:;9 129.7 12 9.7 ~:1 "{ ::A X 20,000
SB 11 '•.1 :{\ -~ ·_:._\-13.1 X 25,000
59 A 133.7 NA HA NA NA 19,600
':oo se 123 .3 NA NA NA NA NA
Sl7 123.5 NA i~/. NA NA NA
581 123 NA Nl. NA NA NA
SA' 124.7 NA NA NA NA NA
S91 129.2 NA NA NA NA NA
520 140.5 140.6M1 X NA X 20,000
S2 100.2 NA NA NA NA NA
sse 121.9 NA NA NA NA NA
Sl 126.3 NA NA NA NA NA
522 144.8 144.3M1 X NA X 21,000
Whiskera 101.5 101.5M6 X LRX-7 X 18,000
11 at upstreaiD end
1.1 at berm subject to overtopping
11 water level at which berm is l>Vertopped
!J Susitna Rivf!r discharge at which berm is overtopped
}./ at bern l cc.it ioa
420162
•
. •
LEGEND
Attachment 2 /
Physical Oata .Needed for I~pact Studies
---· Side.,Channels
X -denotes data reque~ted be provided by ADF&C
NA -denotes data which we und e rstand was not obtained and is not
available
If any data marked NA is available please supply this also
Location Mainstem Mains tea Bena
Side (river Staff Control Cross Cross OvertoP.pina
Channels Mile) 11 Cage 1.1 E!.ev 11 Section !!/ Section Flov ~7
HS II 118.9 119. SH2 X LRX18.2 X 26,000
HS II 115.5 115. 5M4 X LRX18.2 X 14,000
RM 120 120 .0 X X NA NA "NA
S.C. u/s 59 130.6 130.5Ml X LRX34 X NA
S.C. u/s 510 134.3 134.3M1 X LRX40 X 16,200
S.C. d/s 511 135.3 135.3M1 X LRX42 NA NA
..
.....
s. c. u/s Sll 136.5 135. 3M1 X LRX44 X 12,200-18,500
S.C. u/s S21 141.7 141.6!11 J LRX55 X 24.200
s. c. u/s 4th
of July Cr. 131.8 131. 8!11 X LRX37 NA NA
S.C. at head
Gash Cr. 112.1 112 .1!11 X NA NA NA
l/ at upstream end
1.1. at berm subject to overtoppina
11 water level at which berm is overtopped
M Susitna River discharge at which berm is overtopped
'if at berm location
420162
MEMORANDUM
Chicago Office DATE April 3, 1984
E.J. Gemperline
TO --------------~----~----------------
NUMIEA 1563.142.42-0 10-04
-C.crJ' --~ ~
: "' 4--Y Moot •."" c.-./
C.Y. Wei, M.F. Rogers
FROM ------------~--------~~-----------
SUBJECT
Transfer o f DYRESM Results to AEIDC
Please find enclosed two copies of the DYRESM results for
the study periods of May 1981 to May 1982 and May 1982 to May
1983. These results represent Run Id's ~8196E and ~8296E
respectfully. The file ~8l96E was sent to Boeing Computer
Services (BCS) for AEIDC on 29 March 1984 and file ~8296E was
sent on 2 April 1984. The file names on BCS are also ~8l96E and
~8296E respectfully which represent the following simulation
conditions: -
Watana Reservoir Simulation Only
Weekly Reservoir Operation
Energy Demand = 4712 GWh (1996)
Case C downstream flow requirements
4 or 6 units in the powerhouse
Rule curve per memo by N.Pansic (17 feb ?.4)
Reservoir allowed to surcharge to 2193 f t.
Frazil Ice inflow from 1 Nov (5%) to 1 uec (0%) for 80 and 81
Powerhouse multilevel intake design per Acres
Spillway Crest 2148 ft. (654. 71 m)
Spillway Approach Channel Elev. 2125 ft. (647.7 m)
Powerhouse Approach Channel Elev. 2025 ft. (617.2 m)
Offtake No.1 Elevation 21 5 1 ft. (655.6 m)
Offtake No. 2 Elevation 2114 ft. (644.3 m)
~ Offtake No. 3 Elevation 2077 ft. (633.1 m)
Offtake No. 4 Elevation 2040 ft. (621.8 m)
Cone Valve Elevation 2040 ft. (621.8 m)
These results have also been forwarded to N. Paschke for the river
ice simulation (ICECAL).
E.T4
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A-ll ICE ~TH
MEMORANDUM
Ch ic .. • ··off ice
l <CATION ------...-.,.~-----------
l .·-
DATE April 6, 1984
TO
E. J. Gemperline NI:IMBER _1_5_6_3_. _1_4_2_._4_2_-_0_1_0_-_0_4_
FROM
C.Y. Wei, M.F. Rogers
SUBJECT
Transfer of DYRESM Results to AEIDC
Please find enclosed two copies of the DYRESM results for
the study period of May 1974 to May 1975. These results represent
Run Id WA7496A and was sent to Boeing Computer Services (BCS)
for AEIDC on 6 April 1984. The file name on BCS is also WA7496A
which represents the following simulation conditions:
Watana Reservoir Simulation Only
Weekly Reservoir Operation
Energy Demand = 4712 GWh ( 1996)
Case C downstream flow requirements
4 or 6 units in the powerhouse
Rule curve per memo by N.Pansic (17 feb 84)
~eservoir allowed to surcharge to 2193 ft.
Fr·az~l Ice inflow from 1 Nov (5%) to 1 Dec (0%) for 73 and 74
-~~erhouse multilevel intake design per Acres
~ ~ Spillwa~·crest 2148 ft. (654.71 m)
Spillway Approach Channel Elev. 2125 ft. (647.7 m)
Powerhouse Approach Channel Elev. 2025 ft. (617.2 m)
Offtake No. 1 Elevation 2151 ft. (655.6 m)
Offtake No. 2 Elevation 2114 ft. (644.3 m)
Offtake No. 3 Elevation 2077 ft. (633.1 m)
Offtake No. 4 Elevation 2040 ft. (621.8 m)
Cone Valve Elevation 2040 ft. (621.8 m)
These results have also been forwarded to N. Paschke for the river
ice simulation (!CECAL).
c .1 . )1)-~-
C. Y. Wei
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MEMORANDUM
LOCATION _C_h_i_c_a..:gc....o_O_f_f_i_c_e _________ _ DATE Apr il 1 0 , 1 9 8 4
TO E.J. Gemperline N~MIEA 1563.142.42-010-04
FROM C.Y. Wei, M.F. Rogers
SUilJECT Transfer of DYRESM Results to AEIDC
Please find enclosed two copies of the DYRESM results for
the study period of May 1974 to May 1975. These results represent
Run Id WA7401A and was sent to Boeing Computer Services (BCS)
for AEIDC on 10 April 1984. The file name on BCS is also WA7401A
which represents the following simulation conditions:
Watana Reservoir Simulation Only
Weekly Reservoir Operation
Energy Demand z 5164 GWh (2001)
Case C downstream flow requirements
4 or 6 units in the powerhouse
Rule curve per memo by N.Pansic (17 Feb 84)
Reseruoir allowed to surcharge to 2193 ft.
Fr"azil Ice infl<>'fi r_ .. ~-:Al!-1 Nov (5%) to 1 Dec (0%) for 73 and 74
Powerhouse multileve-l. 'intake design per Acres
Spillway Crest 2148 f~. (654.71 m)
Spillway Approach Channel Elev. 2125 ft. (647.7 m)
Powerhouse Approach Channel Elev. 2025 ft. (617.2 m)
Offtake No. 1 Elevation 2151 ft. (655.6 m)
Offtake No. 2 Elevation 2114 ft. (644.3 m)
Offtake No.-3 Elevation 2077 ft. (633.1 m)
Offtake No. 4 Elevation 2040 ft. (621.8 m)
Cone Valve tlevation 2040 ft. (621.8 m)
These results have also been forwarded to N. Paschke for the river
ice simulation (!CECAL).
C. h). ))}-~
c. Y. Wei
M. F. Rogers
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