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DATE DUE
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Demeo,Inc_38-293 --
ARLIS
Atas\<.a Resources
1.ibraJ'Y &Infcnn~rion SefV 1ces,Ju1('",~8g~,A\fl'X~
AUG 2 3 198J
BEFORE THE
FEDERAL ENERGY REGULATORY COMMISSION
APPLICATION FOR LICENSE FOR MAJOR PROJECT
SUSITNA HYDROELECTRIC P,ROJECT
VOLUME 5B
EXHIBIT E
Chapter 2
(Figures)
FEBRUARY 1983
360
L-__ALASKA POWER AUTHORITY _
LOWER DRAINAGE BASIN
(
'\JEKLUTNA
LAKE
STREAMFLOW GAGING AND WATEF
NOTES:
I.CONTINUOUS WATER QUALITY MONITOR
INSTALLED.
2.DATA COLLECTION(JUL-SEP 1981 AND JUN-SEP 1982.)
3.THE LETTER BEFORE EACH STATION NAME IN
THE TABLE IS USED ON THE MAP TO MARK THE
APPROXIMATE LOCATION OF THE STATIONS.
(!)w w
a::(!)N
Z W ::l a:(!)
(!)(!)~<l::!:
<l:<l:>-:I:...J
(!)(!)t:a::u a..
~w w en ::!E
(!)W ...J a..i:i <l:9 i=!(!)<l:::!E en
LL <l:::l W I-
::!E en (!)a I-z ~ww~<l:l-LL a::a::::!E gwenLLw w ::!Ea::w i=!t::r ti 0 0
I-a::w w :JSTATIONenuen~~en ID u
(A)SUSITNA RIVER NEAR DENALI X X X X X
(B)SUSITNA RIVER NEAR CANTWELL X X X X X
(VEE CANYON)
(C)SUSITNA RIVER NEAR WATANA DAMSITE X X Xl X X
(D)SUSITNA RIVER NEAR DEVIL CANYON X X X
(E)SUSITNA RIVER AT GOLD CREEK X X X X X
(F)SUSITNA RIVER NEAR SUNSHINE X X X X
(G)SUSITNA RIVER AT SUSITNA STATION X X X X
(H)MACLAREN RIVER NEAR PAXSON X
(I)CHULITNA RIVER NEAR TALKEETNA X X X X
(J)TALKEETNA RIVER NEAR TALKEETNA X I~X X X
(K)SKWENTNA RIVER NEAR SKWENTNA X X X X
(L)YENTNA RIVER NEAR SUSITNA STATION X X X
-.........
""\
\
I
I
I
II c::?
/
I
I
--
<>
---/--/
./
./
",/
MIDDLE
\
\
\
\
'7 \
\
\
\
\
\
\
o J
.".,..------~./
./
,/
/
./
./
,//
//
"-/'
........_--'"
O~~~~IOiiiiiiiiiiiiiiiiiiiiiiiiiiii~20 MILESSCALE<=:
I~QUALITY MONITORING STATIONS
I
FIGURE E.2.I
SOURCE'R a 11II 1982
RIVER MILE 103.2
SINGLE CHANNEL:
-STABLE
-NON-ERODIBLE BANKS;CONTROLLED BY VALLEY WALLS,BEDROCK OR ARMOR
LAYER CONSISTING OF GRAVEL/COBBLES.
-CHANNEL MAY BE EITHER STRAIGHT OR MEANDERING;IN STRAIGHT CHANNELS,
THALWEG OFTEN MEANDERS ACROSS CHANNEL.
-OCCASIONAL FRAGMENTARY ALLUVIAL DEPOSITS IN FLOODPLAIN.
SINGLE-CHANNEL RIVER PATTERN
FIGURE E.2.2
SOURCE'RaM 1982
RIVER MI LE 124.4
SPLIT CHANNEL:
-MAIN CHANNEL BEHAVES SIMILAR TO SINGLE CHANNEL AT LOW FLOW.
-SIDE CHANNELS PROVIDE FLOOD RELIEF AT HIGH FLOWS (GREATER THAN
20,000 CFS).
-ISLANDS WELL ESTABLISHED WITH VEGETATION.
-GRAVEL/COBBLE BED MATERIAL.
-MEAN ANNUAL FLOOD CORRELATES WITH BANKFULL FLOW.
-CHANNELS ARE MODERATELY STABLE.
SPLIT-CHANNEL RIVER PATTERN
FIGURE E.2.3
SOURCE'RaM 1982
CHULITNA RIVER NEAR CONFLUENCE WITH SUSITNA RIVER
BRAIDED CHANNEL:
-FLOODPLAIN IS VERY WIDE AND SHALLOW EVEN AT FLOOO FLOW.
-MULTIPLE AND INTERLACING CHANNELS IN UNVEGETATED GRAVEL FLOODPLAIN
-MOVE LARGE QUANTITIES OF BED MATERIAL DURING FLOWS GREATER THAN
BANKFULL
-RESULTS FROM COMBINATION OF HIGH RATES OF BEDLOAD TRANSPORT,LOW
CHANNEL STABILITY,HIGH SEDIMENT SUPPLY,HIGH GRADIENTS AND LOW
UPSTREAM FLOW REGULATION.
BRAIOEO-eHANNEL RIVER PATTERN
FIGURE E.2.4
SOURCE'R 8 M 1982
DELTA ISLANDS
MULTI-CHANNEL (DELTA ISLANDS):
-VERY BROAD FLOODPLAIN WITH LITTLE LATERAL CONTROL.
-MULTIPLE CHANNELS CONSIST OF A MIX OF BRAIDED,S~IT CHANNEL AND
SINGtE CHANNELS WITHIN FLOODPLAIN.
-RELATIVELY UNSTABLE.SUBJECT TO MAJOR LOCAL CHANGES DURING SINGLE
FLOOD EVENTS.
-LARGE AMOUNT OF FINE SUSPENDED SEDIMENT HELPS STABILIZE BANKS;
DENSE VEGETATION EFFECTIVE IN TRAPPING SEDIMENT.
-BED MATERIAL CONSISTS OF GRAVEL/SAND WITH POCKETS OF SILT.
MUL TI-CHANNEL RIVER PATTERN
FIGURE £.2.!5
·
1400
~
~w
W
LL.
~
z 1350
0
i=~
W
....J
~w
1300
1550
1500
1450
_~WATER SURFACE
V FORQ~8,100CI
/WATANA""........,,;/
1250 ~-----+-----,,-+~-,,----'."""""~=-----+-----------+-----+-------+-I
~
1200
1150
160 162 164 166 168 170 172
SOURCE:R •M 1982
....J
:>
1LIo
NOTES:
I.WATER SURFACE PROFILES
ON PRELIMINARY DATA.
2.URX ~UPPER RIVER CROSS
SECTION (ABOVE DEVIL
CANYON ).
BASED
SUSITNA RIVER THALWEG
DEADMAN CREE
I
~x 102
~..~~
~l"'''''~THALWEG PROF I LE
E PROFILE
:FS AT
FIGURE E.2.6
lll:
~
~a::u
z«
~o«
l<Jo
186 188184182180178176174
RIVER MILEI
i
I
lAND WATER SURFACE PROFILES
tK 10 DEVIL CREEK
I
I
950
900
850
800
WAl~
100I-W
W
lL..
~
Z
0 750i=<t>W
WATER SURFACE PROFI LE FOR ~...J -W
PROBABLE MAXIMLIM FLOOD "",r-IY',.,---./
'-"700 ~/V::'.............."~
v~~V //~~LRX 45
~650 ~V~"
//?/-
-""~~~....."/7600~,~~L'X 35~--.........."'"~LRX 29
550
136 138126128130132134
Z O:.t:WZ za::NOTES:<t ...JW(!)O «wOW<t--:;.~(!)CI::(!)I-o-J.WATER SURFACE PROFILES BASED CI::u j5 za::WONPRELIMINARYDATA.:I:enen2.LRX =LOWER RIVER CROSS SECTION
(BELOW DEVIL CANYON).
SUSITNA RIVER THALWE~
DEVIL CA~
SOURCE:RaM 1982
I
!
/
.....
,,'",
/'~
~:;;;f,,/
_./~LRX68,..
l,0/,..//
,,/V.,-/'~~TER SU RFACE :~/~2bYR,FLOOD
V'".,-"-"LRX 59~/~V,/Y V
"./.,-
!'--THALWEG~",,'PROFILE
'/\
WATER SURFACE PROFILE
FOR Q=13,400 CFS AT
GOLD CREEK
i
140 142 144 146 148 150 152 15
~RI VER MI LE :II::z
W 0W>-0::ZU«u
4
~AND WATER SURFACE PROFILES
~YON TO RM 126
w
(,!)«t-o::o
!I..
-l;;:
wo
FIGURE E.2.7
650
600
550
I-500
LLl
LLl
~
zo
~>LLl
u1 450
400
350
LRX 3
WATER SURFACE PROFILE FOR
PROBABLE MAXIMUM FLOOD
300
98 100 102 104 106 108 110
SOURCE:RaM 198Z
ctLLlzuI-z
:::::iLLl
:::l:::l
:I:...Ju~,z
«0
ZU
!=en
:::len
NOTES:
I.WATER SURFACE PROFILES BASE D
ON PRELIMINARY DATA.
2.LRX::LOWER RIVER CROSS SECTION
(BELOW DEVI L CANYON l.
LLlen
ct
:I:
U
SUSITNA RIVER THALWEG
RM 126 l
,.~,.,.-_"V
WATER SURFACE PROFILE .~..~~".- -~
FOR IQOYR.FLOOD \_~......,~-;;;-__
\._J·_·:::--~/Y
iE PROFILE
jCFS AT
112
RIVER'MILE
114 116 118 120
>-cr
cr
;:)
u
122 124 126
lAND WATER SURFACE'PROFILES
Iro TALKEETNA
f-
I
I
I
FIGURE E.2.8
1 ~·······l 1 )------1 1
PARKS HIGHWAY
BRIDGE (SUNSHINE)
~
V
KASHWITNA CREEK r
CONFLUENCE
/S\)S
SUSITNA -YENTNA RIVER /"CONFLUENCE
------~
~COOK ----INL:
~-~
500
400
~w
W
l!..
Z
o 300
~>W
...J
W
200
100
o o 10 20 30 40 50 60 70
RIVER MILE
80 90 100 110 120
SOURCE'RaM 1982
SUSITNA RIVER THALWEG PROFILE
SUNSHINE TO COOK INLET
FIGURE E.2.9
1 1 1 1 1 1 1 J
5000400020003000
DISTANCE (FEET)
1000·o
l-
I-
l-
I-
f-
e-
l-
f-
l-
f-
e-
l-
I-
f-
e-
e-.~--
-'"--
-
---
-~0:52000
-I ·0:34500 -
-1J'r,A Q:23400
-1\0:17.000
-Q:13,400-\"-
-U '\.Q:9700
c-o:6000Cell-
I--
l-
I-
l-
f-
l-
f-
l-
I-
h II1I1111 I I I I I II II .I I " " I I I
I I I I I I I I I I I I II I II I II I I I I I I I I I I I I I I I I
620
590
-1000
630
B 600
I-
:Ja..
~o
(,)
z
0
~oct>W
..J
W
W
(,)
~610
a::
:J
Cf)
a::w
~
~
I-
W
W
LL.
NOTES:
Q -=FLOW (CFS)
(e)-::ESTIMATED
SOURCE'RaM 1962
CROSS -SECTION NUMBER 32
NEAR SHERMAN (RIVER MILE 129.7)
FIGURE E.2.10
1 1 1 --1
sus/rNA RIVER
SUSITNA RIVER PLAN INDEX MAP
J
E.2.12 ,.
DEVIL
CANYON -~-J
FIGURE E.2.11
LEGEND:
+RIVER MILE
~LRX CROSS SECTION
100 YEAR FLOOD PLAIN
BOUNDARY
•@9
THERMALLY INDUCED OPEN LEAD
DURING WINTER
BERM
STAFF GAGE SITE
SUSITNA
RM 152
IVER PLAN
o RM 145
FIGURE E.2.12
NOTE FOR LEGEND SEE FIGURE E.2.12
SUSITNA
RM 145
•
RIVER PLAN
TO RM 139
FIGURE E.2.13
NOTE:FOR LEGEND SEE FIGURE E.2.12.
SUSITNA
RM 138
RIVER PLAN
TO RM 132
FIGURE E.2.14
NOTE.FOR LEGEND SEE FIGURE E212.
SUSITNA
RM 131
RIVER PLAN
TO RM 125
FIGURE E.2.15
NOTE;FOR LEGEND SEE FIGURE E.2.12.
SUSIT~
RM I~
RIVER PLAN
TO RM 118
FIGURE E.2.16
,...
,...
NOTE FOR LEGEND SEE FIGURE E.2.12.SUSITNJ
RM Iii
~RIVER PLAN
TO RM "I FIGURE E.2.17
NOTE:FOR LEGEND SEE FIGURE E.2.IZ.
SUSITN
RM III
RIVER PLAN
TO RM 104
=
FIGURE E.2.18
NOTE:FOR LEGEND SEE FIGURE E.2.12.
SUSITNJ
RM IO~
RIVER PLAN
TO RM 101
FIGURE E.2.19
NOTE FOR LEGEND SEE FIGURE E.2.12.
SUSITI
RMI<
A RIVER PLAN
o TO RM 97
FIGURE E.2.20
55+00
HEAD OF SLOUGH
AT STATION 62 fo 27
NOTE:WATER SURFACE PROFILE IS
REPRESENTATIVE OF AUGUST 24,1982
CONDITIONS;MAIN STEM DISCHARGE AT
GOLD CREEK 12,500 CFS,SLOUGH
DISCHARGE 3 CFS.
DISTANCE (FEET)
SLOUGH 9
62t27
-----/--c
6 FT IMI
GRAOIENT =5.
N
/
o
610
605
~w 600w
lJ..
Z
0
i=ex>595w
-lw
590
SLOUGH 9 THALWEG PROFILE
SOURCE:TRIHEY 1982 FIGURE E.2.21
605
600
~595ww
lL.
Z
0
i=
~
W
...J 590w
LEFT
'"BANK
\kHT
BANK
~J,-------,...--
L AUG.I WATER SURFACE ELEVATION
(MAINSTEM DISCHARGE 26,400CFS )
NOTES:
I.CROSS SECTION #128.853 APPROXIMATELY 2400
FEET UPSTREAM OF SLOUGH MOUTH.
2.CROSS SECTION REPRESENTS VIEW LOOKING
DOWNSTREAM.
3.MAINSTREAM DISCHARGE MEASURED AT
GOLD CREEK.
585
580
-30 o 30 60 90
DISTANCE (FEET)
SLOUGH 9 CROSS SECTION
120 150 180
FIGURE E.2.22
50
40
30
20
(/)
l.Lo
ooo
6
4
••••• •••....._-
~.--~•--------r------·WY1969 ---~
2
1.01 1.25 2 5 10 20
RECURRENCE INTERVAL (YEARS)
50 100 500 1,000 10,000
LOW-FLOW FREQUENCY ANALYSIS
OF MEAN ANNUAL FLOW
AT GOLD CREEK
FIGURE E.2.23
I I I r I r II I ,II I I II I I II I J
-LEGEND:
~~......CANTWELL FLOW---WATANA FLOW~
GOLD CREEK FLOW
~
~~
"l'
~I I
r ', I
~I ,,~-I I
\,
",
I ::.l~
'--I ::\
l·\i ~,~.,..:II
'"","t ':I', I
~:~.,
" ","..'
V::
~:,,'.\;..-I
I
I
-~
·
·-
·:
"..
-
I I I "-''T'I I
88
80
72
64
56
II)
u..u
o 48o
Q
W
<9a:«
~40
en
o
32
24
16
8
o
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1964 NA
CANTWELL,WAt
I,
E
MONTH
JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
rURAL FLOWS
ANA AND GOLD CREEK
FIGURE E.2.24
88 ,.....---r,-"""-'-_'I"""-"T'",-"T",-"T"I-"'T"I-""T"--"ll"""-""T',--"I--",r--I-",-"""'T,-"""'T'_I-'''''''-'''''I
.....LEGEND:
..........CANTWELL FLOW
80 I--- ---WATANA FLOW
GOLD CREEK FLOW
721------------------------------------
641-------------------------------------
-
561------------------------------------
(i)u..u§48
w
~n::
~401------------------------------------uen
o
-
JANUARY FEBRUARY MARCH APRIL MAY
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1967 NA
CANTW.ELL,WATj
I I I I I I I I I I I I I I I I 'I I I I I I , ,
-
-
-
-
I
II ,
I ,
I \
I I
II I
I II.,
I:::~,,: :::
i \Y':./:,::/. .\~;\..\~
.......'.".\
......'."
..••.'",
!••••"
-
-
-
-
-
-
.......~.~.~:\..
-.-.....................'-
I I I I I I I I I I I I I I I ··~··~~7;;;:··-:-::;l~..·~~,:::::·.;:::.'::;'I-?"'=-="~'r:-:'~:=f'·r--I -I --.-
~JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEr.eER
!MONTH
I
~TURAL FLOWS
i
rANA AND GOLD CREEK
I
AIJASKA:RF~OTW~~T'm1'-A..'R'tl
us.DE'''r (',;
FIGURE E.2.25
88 J I 'I I I I I I II I I II I I I I I r
I-LEGEND:......'".......CANTWELL FLOW----WATANA FLOW
80 ~
GOLD FLOW
I-
72
I-
64
~
56
~lo-
U)
1L.
U
0 48
0
Q-w ~
CJa::«40:r:uen
0
~
32
I-
24
I--A I~\J\16 .\
J\V;/\"',Y \..IV
'--
1 \r ~\,):\-"\
:.\I.•..:~\.I'J.,..,J ...........~i'·,:"......:~
8
:....:...........-J!.....•...
l-
I I .1
I I I I I0
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE;
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1970 Nt(
CANTWELL,WAT
I I I I I I I I I I I I I I I I I I I I I I I I I
-
-
-
-
-
-
-
:/1 !...:;.\(-'i....'..::vv..,.J ~I ·~:....•.•..•.. \.'.~.'"1}\j:'.\............i ..\IA
. ":'.''\v'-"...."".. \'/'.1 A
-
-
-
MONTH
JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
:
,rURAL FLOWS
rANA AND GOLD CREEK
FIGURE E.2.26
1 1 1 --1 1 J
~
./'
./'~~
/.",~./
~~I~~
~A./~--~~~......--
..-~
~~..-----~~
~~
.~V
l""""
200 50050100201025
RECURRENCE INTERVAL (YEARS)
ANNUAL FLOOD FREQUENCY CURVE
SUSITNA RIVER NEAR CANTWELL
1.251.05
LEGEND
A OBSERVED DATA
o ESTIMATED DATA
•95%CONFIDENCE LIMITS
10
1.005
THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95%CONFIDENCE LIMITS
PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD
100
90
80
70
60
50
rn
l.L
0 40
0
0
0-
LLI
C)300::«
:J:
0rn
c
20
SOURCE:R e.M 1981 FIGURE E.2.28
1 1 ...)~-I ..}
../'
./
/
/"V
//'/
///~
~~
~~....-A.-------.-A --~..~....__-e-............~
30
40
20
THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95 %CONFIDENCE LIMITS
PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD
100
~8
l8
50
ffu
ooo=-10w
C,!)9
0::8~7uen6
B
5
4
3
2
LEGEND:
•OBSERVED DATA
o ESTIMATED DATA
•95%CONFIDENCE LIMITS
1.005 1.05 J.25 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50 100 200 500
ANNUAL FLOOD FREQUENCY CURVE
MACLAREN RIVER NEAR PAXSON
SOURCE'RaM 1981 FIGURE E.2.30
1 1 )-j ----1 1 J -'J 1 1 1 ---J --1 1 )-)
--
......!l/'
~V
:/V
-"/
~~..,...-
~-'---'
~•~
~......-----~----_.--4..--
V--~~~,.-----....-
.---"~
~.~~--
•[J"
50020010050201025
RECURRENCE INTERVAL (YEARS)
"1.251.05
LEGEND:
•OBSERVED DATA
o ESTIMATED DATA
•95%CONFIDENCE LIMITS
10
1.005
THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95 %CONFIDENCE LIMITS
PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD
1000
90g80
700
600
500
400
300
en 200
lL.
U
8
0
~
UJ 100
C)
II::90«~8::J:u
(f)
0 60
50
40
30
20
ANNUAL FLOOD FREQUENCY CURVE
TALKEETNA RIVER NEAR TALKEETNA
SOURCE:RaM 1981 FIGURE E.2.32
"j 1 1 J 1 1 J 1 ]1 )]--J J
I I I
NOTES:
//I.THE MEAN ANNUAL INSTANTANEOUS FLOOD PEAK
IS DETERMINED BY THE FOLLOWING FORMULA /--
Q:7.06 (D.A.)-46.3 (L)+697.14 (GH·200.15 (MAP)-49.55(MAS)-2594.00
/
WHERE:V/Q:MEAN ANNUAL INSTANTANEOUS PEAK FLOW (CFS)
~D.A.=DRAINAGE AREA (SQ.MI.)./L=STREAM LENGTH (MI.)~
G=PERCENT OF DRAINAGE AREA COVERED BY GLACIERS V./MAp:MEAN ANNUAL PRECIPITATION (IN.)/~FLOOD
MAS:MEAN ANNUAL SNOWFALL (IN.)/',,/
PEAK
ESTIMATE
2.THE FLOOD PEAK FOR A GIVEN RETURN PERIOD IS ///'--DETERMINED BY MULTIPLYING THE MEAN ANNUAL .VPEAKBYTHEDIMENSIONLESSCURVERATIOFOR/'--.--~-........THE RETURN PERIOD OF INTEREST.~...-'\COMPOSITE 95 %.,....,.."CONFIDENCE '>~",...,'"\
INTERVAL "\.,....,......-::~~.......\~....---
~'....-~',
-f--~...........--"..--,..,..."-....--.-.-------,..,...'.,....,..
.,....,../
.,....,..
.....
7.0
6.0
5.0
4,0
3.0
0
I-2.0<l:
0:::
(f)
(f)
lJ.J
...J
Z
Q
(f)
Z
lJ.J
:::!:1.0
Cl
0.9
0.8
0.7
0.6
0.5
0.4
0.3
1.005 1.05 1.25 2 5 10 20
RECURRENCE INTERVAL (YEARS)
50 100 200 500 10POO
SOURCE'RaM 1981
DESIGN DIMENSIONLESS REGIONAL FREQUENCY CURVE
ANNUAL INSTANTANEOUS FLOOD PEAKS
FIGURE E.2 34
-
......180
165-,
150
f"""135
120
(I)u.
0 105
0
0,....52
90
lIJ
(J)
c::«75:I:
0
(I)
Q
60
45
~30
15
r-
0
j
/v
/v
1//IJ
~V "7
)J
ANNUAL----<~/
/~v
v v
/~SUMMER
~
1.005 2 5 10 20 50 100 1,000 10,000
RECURRENCE INTERVAL (YEARS)
WATANA
NATURAL FLOOD FREQUENCY CURVE
FIGURE E.2.35
-
"...
,-180
165
150-135
120-I en
LJ..u 105
0
0
Q
90w
C)
a:::
<r 75:I:
~Uen
0
60
45
-30
I
15-0
J
/
/
J
/v
i/
J
/
Jv
1/
/
1.005 2 5 10 20 50 100 ~OOO 10,000
-
-
RECURRENCE INTERVAL (YEARS)
DEVIL CANYON
NATURAL FLOOD FREQUENCY CURVE
FIGURE E.2.36
200 t------+-------+-----t-------/-----___I_----___1
\
\
I \
I \I ,
/"/,
./".//-,40 t-="---,=;;;;;o--='--+---------::;;;..-"'9------t-------+---------"o,....-:--f------::-;.,;.----=......l--
en
~120 t------+-------+--+----j'--t-~.___\_-_+_----___I_----___1
ooo
160 t------+-------+-------iL-t---\-----_+_----___I_----___1
LJJ
(!)
0:::«G 80
~c
-5 PEAK
TIME (DAYS)
5 10 15
LEGEND
FLOOD VOLUME
(FT 3)
PEAK DISCHARGE
(CFS)
100 YR.122.3 X 10 9
500YR.178.2 X 10 9
---10,000 YR.269.2 X 109
104,550
131,870
171,200
SUSITNA RIVER AT GOLD CREEK
FLOOD HYDROGRAPHS
MAY -JULY
SOURCE'R 8 M 1981 FIGURE E.2.37 ,
,....
I
200t------+------+-----t------+------+--------l
r-
160
,.....
(/J
u.
0
0120
0
Q
~w
(!)
a:
<l:
~
0
(/J
0 BO
40
-
-----
'\
"\
""\
"
PEAK
TIME (DAYS)
5 10 15
LEGEND:
FLOOD VOLUME
(FT3)
100YR 53.8 X 10 9
500YR 78.8 X 10 9
10,000 YR 119.5 X 109
PEAK DISCHARGE
(CFS)
90,140
119,430
163,.960
SU SITNA RIVER AT GOLD CREEK
FLOOD HYDROGRAPHS
AUG -OCT
SOURCE:RaM 198\FIGURE E.2.38
10
5 ~!§~~~~§~~§!§§81=
6J----+--+----+--+----+--+---+--+--+---I
41----+-+---+..,..-+---+-+--+-+--+---1
10 5
8
6
4
2
10 4-8en6lL
~4
LLJ
C)
0=:
~2 ......
0 ........r---en --is 10 3 .........
8
6
4 ----2
10 2
0 10 203C
%OF TIME DISCI
10 5
8
6
4 \.\""-----2 \"'--,
10 4 '----8en6lL
~4
LLJ
C)
0=:«2x
0en
is
10 3
8
6
4
2
21----+-+---+-+---+-+---+-+--+---1
2 ,____,
..------'\
10 4 ......-......."
8 ~~E§~-Ei~E
6 I---+-+--+-+--+-+--+-+-~~...---I,'
4 I---+--+--+-+---+-+--+---+--+~'
21---+-+---+-+---+-+----+--1---+---1
10:E~3EI§~I3~E~~E3
41---+-+--+-+--+-+--+-+--+--1
4 I---+--I---+--+---+--+---+-+--"+-"-=-~----":"""---2 1---+-----,--I__-t--+__-F-.......~....-_-+-+--+----1
2 FE BR~A~Y ....-...........
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10:§~~~!~~~~~~~~~~
61---+--+---+--1---+-+---+-+--+----1
4 ~,~I---+--+---+--+---+-+--+--+---1
......""......
21---+-+--+-+--+-+--+-+--+--1
LLJ
C)
0=:«xoen
is
10:~~~Ei3~~3~E3~~3
61---+-+---+-+---+-+---+-+--+---1
41---+-+---+-+---+-+----+-+--+---1
en
lLo-
21----+-+---+--+---+-+---+-+---+--1
21----+-+---+-+--+--+--+-+--+---1
._-"'-2 J----+--+----+--+----+---l----=""""h...,,--+----+-----I
,2 J~N~A~Y ................~
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10:~~~~~3~E~3E~~3
61----+-+--+-+---+-+--+--+--+----1
4J----+--+----+--+----+--+----+--+----+-----I
10 5
8
6 \.
4 '\"."',............-...............------~2 '-,--"-----:'\..-10 4 .............--.en 8
lL 6 --~-......
'"LLJ 4 Kw "~«2z
0en
is
10 3
8
6
4
en
lLo-
2I__--+------j..,..---+--I----+--I__--+--I__-+-----t
'"21---+--+__-+--+---+--+---+--+---+----:.tt
,
10
2
0'10 20 30
%OF TIME DISCI
10:§!§~~
6 1----+---+-4-4
4 \,
2',""-~'""".'10:Ei,2:E~
6 1__--+---lIr,,-+-1
4 1---+---+-\.:>,-+-1,
2 I---I---+-H
en
lLo
LLJ
C)
0=:
~2 1__--+---+-+-1
oen
is 10 38aH
6 1----+---+-+-1
4 1----+---+-+-1
---
-..-......-
"-'-"-
------f--___--__........
..........-....
.JU1LY
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10:~!~~!~~!~~~~~E~
41---+--+---+--+---+-+---+-+--+---1
2
10 4-8en
lL 6
0--4
LLJ
C)
0=:
~2
0en
is 10 3
8
6
4
2
JUINE
102 L-.....l...-.J_....J....---l._...L....---l._....L....,.....l._..L..-......o 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10:§!§~f§~~~~~~~§~
61---+---If------+--f----+--f----+--f-----+---1
41__-t------j---+--I---t--I----+--I---t-----t
--10
4 ~aaaaaaaaaen8~~61---I--+----+--+---+--+--+--+---+----1
'\.UJ 4 ......_
~--.....-----z 2 f------+--=-1 __-+-_-f------+--f-------P........,+--f----l
~---..................,
is -..._"
10:~~~~E§~gg~§~~~~
6 1----+--1-""""'..-J,,;;;-....=--I----+--I----+--I---t--'~.
4 I---+---I--+--f------+-----f=-.....-........~+---+------1-.........
2 N~VE~BfR
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2 D~CE~BfR
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 3C
%OF TIME DISC
lOS lOS
8 8
6 6
4 4 \.
"~~.............2 2 ..................~,"-
10 4 10 4 '..."-
en 8 -..8 \........"6 m 6 '"IL.IL.'""I"-~0 \"""'"4r\.
.....4 r.
U.I U.I ........--""(!)"'-(!)....'I'1\a::a::~..c(2 ~c(2
"
::J:1\,---r--::J:1'..'....\0 0
-I"--m -...
r-----m ~\,r--r-...2i
10 3 ..-.I"---2i 10 3---..8 ...........8 '""--"6 '\.......6 -.....---.--..........
4 "4 ..........
..........,~--1"-._-..\-2 2-'-"'........-.""",IMA~CHI·..........AP~IL .""",M~Y
10 2 .....10 2
i30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
~CHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
I
lOS lOS
8 8
6 6
4 4
1\-r----'"r--.2 "..........-.....-2
'-----r-......--"i
r-_r-.......1'\"',--r--10 4 .-.10 4
en 8 .......-..8 1""00..-...........I"-m '"r-...IL.6 IL.6,\................'\."--100-.
"\~...................,~"""--~"',U.I 4 ............1'....4 -...1"--...........U.I
\(!)\(!)..-I"-........"a::--I-.a::"',"'........c(c(
::J:2 ..::J:2 ..............,
0 0(/)
"I'
m 1""'00-..~"\2i
10 3 2i
10 3 -.ro-
8 8
6 6 -......
4 4 "I
i
2 2
,UG,UST
10 2
SE1PTI ~M~ER
10'2
O\CT4 )8~R
o 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
I·NOTES;i LEGEND:
\I.FLOW DURATION CURVES BASED ON MEAN GOLD CREEK
DAI LY FLOWS.----CANTWELL
'\2.PERIODS OF RECORD:DENALI-----\DENALI:MAY 1957-SEPI966,"\.1\\.NOV 1968 -SEP 1981,CANTWELL:MAY 1961-SEP 1972
1\\""-MAY 1980-SEP 1981
GOLD CREEK:AUG 1949-SEP 1981"1','"r--........~"-r-.........
"-.....MONTHLY AND ANNUAL
I ....FLOW DURATION CURVES!.'"......'"1""...SUSITNA RIVER NEAR DENALII1'0 ..SUSITNA RIVER NEAR CANTWELLI......
!"
[~N~UA~'"SUSITNA RIVER AT GOLD CREEK
o 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED FIGURE E.2.39
-
~~~
~
"----I'--
4
2
lOS
en 8
IL 6
0
4
IIJ
C)
0:::ct 2:J:
0en
5 10 4
8
6
4
2
10
3
0 10 203(
%OF TIME DISC
2 1---+----+----+
10:~E~~
6 1---+--+--1
4 1---+--+--+
2 I---+--__+___+_
310 0L....-...I.10-2.....0---l.3(
%-OF TIME DISC
10
3
0 10 20 3(
%OF TIME DISC
10 6
8
6
w
(!)
It:
j!2 1---+----+--+
oen
C 10:~~~~
6 1---+----+--+
4 1---+----+--+
10 6
8
6
4
2
10 5
8en6ILe4w
C)
0:::
ct 2:J:
0en
5
10 4
8
6
4
2
10:E:=E=t==t
~6 1---1-_+_---+
o
4 1---+----+----+
80 90 100
OR EXCEEDED
I'..~...........----
D~CEIMB~R
I\..
-,...."""-...
F~8R~A~Y ,
~r------.....-
dUllY
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
10
3
0 10 20 30 40 50 60 70
%OF TIME DISCHARGE EQUALLED
10 6
8
6
4
2
10 5
en 8
IL 6
0
4
IIJ
(!)
It:
ct 2:x
0en
C
10 4
8
6
4
2
106
8
6
4
2
lOS
8en6IL
~4I.LI
C)
It:ct 2~
0en
0
10 4
8
6
4
2
2
10 5
en 8
IL 60
w 4
C)
It:
ct 2~
0en
C
104
8
6
4
2
~
'\.
~-~~~r--..........
.......
*1VE~B~R
.........r--~-~
.......
dU1NE
I---I-----'-
I'--..~
--
d~N~A~Y
10
3
0 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
I.LI
~
~2
~o
10 4
8
6
4
2
3
10 0 10 20 30 40 50 60 10 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EOUALLED OR EXCEEDED
10 6
8
6
4
2
10 5
en 8
IL 6~
IIJ 4
C)
0:
ct 2%
0
U)
0
10 4
8
6
4
2
__lOS
U)8
~6
4
10 6
8
6
4
2
lOS
en 8
IL 60
w 4
C)
0:ct 2%
0en
0
10 4
8
6
4
2
-
~....--"",.....
"\
1'\
'\
MAY
I
.....
~
.....~---10-.....--.""1\
II 0ICT?8~R
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 3
o 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
106
8
6
4
2
lOS
8
C/)
6LL
U
4au
(!)a::«2:I:
U
C/)
i5 10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
C/)
LL 6
~
4au
(!)a::
~2u
C/)
i5
10 4
8
6
4
2
""'"-
~-....
AP~IL.
~--i"""ooo...
...........
"'
SEIPT~M~ER
MONTHLY AND ANNUAL
FLOW DURATION CU RVES
SUSITNA RIVER AT SUSITNA STATION
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
10 5
en 8
LL 6~
au 4
(!)a::«2:I:
U
C/)
i5
10 4
8
6
4
2
10 6
8
6
4
2
lOS
en 8
LL 6u
4au
(!)a::«2:I:
U
C/)
i5
10 4
8
6
4
2
NOTES:
I.FLOW DURATION CURVES BASED ON
MEAN DAllY FLOWS.
2.PERIOD OF RECORD:OCTOBER 1974 -SEPTEMBER 1981.
o
ED
00
ED
I
I
i
.......--i
i
IIMA~CHI
)()40 50 60 70 80 90 10
CHARGE EQUALLED OR EXCEED
-------'"
,UG1UST
~O 40 50 60 70 80 90 I
CHARGE EQUALLED OR EXCEED
,
"""-\.,\
,~
--...r"ooo..
'"
~N~UA~
!O 40 50 60 70 80 90 100
HARGE EQUALLED OR EXCEEDED FIGURE E.2.40
10 4 10 4 10 4
8 8·8
6 6 6
4 4 4
2 2 2
10 3 10 3 10 3
en 8 .-.8 .-.8
&a.6 (I)6 (I)60&a.&a.-~~
1&.1 4 4 41&.1 1&.1
(!)(!)(!)a::a::a::
c[2 c[2 ~2~"~
0 0 0
(I)..........(I)~(t)
C
10 2 r---is
10 2 ..........is
10 2 ~~
8 --8 --8
6 ......6 ....6......"'
4 ...........4 ...........4
2 2 2
10 1 d~N~A~Y
10 1 F~BR~A~Y
10'
0 10 20 30 40 50 60 70 80 90 100 ·0 10 20 30 40 50 60 70 80 90 100 0 10 20 3(
%OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISC
10 4 10 4 10 4
8 8 8
6 6 ......6..............
4 .........4 .........4 "--......---......."""'--"~...........---............
......................2
............
2 .........2
10 3 "-10 3 10 3
.-.
(I)8 en 8 .-.8
&a.(I)
~6 &a.6 &a.60~4 -41&.1
41&.1 lU
(!)(!)(!)a::a::a::
c[2 c[2 c[2~~~
0 0 ~(t)(I)
is
10 2 is
10 2 is
10 2
8 8 8
6 6 6
4 4 4
2 2 2
10 1
dU1NE
10 1
dUllY
I
0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 10 O·10 20 3C
cv.·OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCI
10 4 10 4 10 4
8 8 8
6 6 6
4 4 4 ",
2 2 2 "'\N
.-.10 3 10 3 10 3
(I)8 .-.8 en 8
&a.(I)
~6 IL.6 IL.6
0 ~4 -4 4
1&.1 "'-lU 1&.1
(!)...........(!)(!)a::...........-a::~a::c[2 ~2 c[2~-..........."""'--~
0 .............0 ----0
(I)(I)--(t)
C
10 2 ............2i 10 2 -.................C 10 2
8 8 8.....--.
6 6 6.......
4 4 4
2 2 2
10 1 N~VE~BfR I D~CEIMBfR I
0 10 20 30 40 50 60 70 80 90 100 10 0 10 20 30 40 50 60 70 80 90 100 10 0 10 20 3C
%OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TI ME DISC
!\
""'""""'"..............................
........
"'\
\
\.
'\
'\
M~Y
.....
"-........-I'--.----"""'--.........~"-
"
OCT~)BER
I I II
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 1
o 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 4
8
6
4
10 4
8
6
4
2
10 3
8en6IL
0
4
1aJ
fi~2
~
C 10 2
8
6
4
2
2
10 3
en 8
IL 6
~
1aJ 4
(!)a:::
c(2~
0en
C
10 2
8
6
4
2
MONTHLY AND ANNUAL
FLOW DURATION CURVES
MACLAREN RIVER AT PAXSON
..........i'--..........-"""""'-..........
r--.
AP~IL
I"..
"-~I
~
-......
...........
~
"\
I
I
SE1PTI~M~ER
NOTES:
I.FLOW DURATION CURVES BASED ON MEAN
DAILY FLOWS.
2.PERIOD OF RECORD:JUNE 1958 -SEPTEMBER 1981.
I
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 4
8
6
r
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
4
2
10 3
en 8
IL 6~
1aJ 4
(!)a:::
c(2~
0en
C
10 2
8
6
4
2
10 4
8
6
4
2
10 3
en 8
IL 6
0
41aJ
(!)a:::
c(2~
0en
C
10 2
8
6
4
2
o
ED
00
ED
-...--t'o...
IMA~CHI
30 40 50 60 70 eo 90 10
CHARGE EQUALLED OR EXCEED
I
:
r-r-.--.......,,~
\
I
I
I
i
i
,u8
1
usT
~O 40 50 60 70 80 90 I
CHARGE EQUALLED OR EXCEED
r\
I "
I "-i \
r \
I ,
I\.
"'-....
!"'-"
~N~UA~
~o 40 50 60 70 80 90 100
ICHARGE EQUALLED OR EXCEEDED FIGURE E.2.41
I'
I\."-\\~~
".,
\,,
I\."",,-
\......1""'---1-
"
'...._-
....................r--...--.
10 2
0 10 20 30
%OF TI ME DISCI
10 2
0 10 20 30
%OF TIME DISCI
105
8
6
4
10 2
0 ,1020 30
%OF TIME DISC.
105
8
6
4
2
10 4
8U)6&L
~4
kI
(!)
0::«2:z:u
f/)
0 10 3
8
6
4
2
2
10 4
8en6&Le 4
kI
(!)
0::«2:z:u
(/)
C
10 3
8
6
4
2
105
8
6
4
2
10 4
8
(/)6&L
~4
kI
(!)
0::
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(,)
f/)
C
10 3
8
6
4
2
.........-..........I--...........---.........
---.....
~CE~B~R
\.
"""--"-I--I--r--10-...-,
.........".....-...........
dUlLY
,---------10----
F~8R~A~Y
2
2
105
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
105
8
6
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
105
8
6
4
2
10 4
(i)8
&L 6u
4kI
(!)
0::«2:z:u
f/)
is
10 3
8
6
4
2
4
2
10 4
f/)8
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4
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0
10 3
8
6
4
2
"'"........!"'o....
1',...........~~
"-....................--..........-""'---I ....
"'"
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f""'..,--"""-~........
.........-----""-----.......----1--.......
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"----r--I--r------
"--
I'"'-
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-....-..
"~N~A~Y
10
2
0 10 20 30 40 SO 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
i0
2
0 10 20 30 40 50 60 7080 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
lOS
8
6
4
10 2 o 10 20 30 40 eo 60 70 80 90 100
'".OF TIME DISCHARGE EQUALLED OR EXCEEDED
105
8
6
4
2
10 4
f/)8
&L 6~
4kI
(!)
0::«2:z:
(,)
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10 3
8
6
4
2
2
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f/)8
&L 6~
4
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(!)
0::«2:z:u
U)
0
10 3
8
6
4
2
lOS
8
6
4
2
104
(i)8
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4kI
(!)
Q:«2:z:u
f/)
0
103
8
6
4
2
1"-""-~,"'.r--.....
....
".........
"..................-,"-...."-'..
"'-"..i"'.....
..
M~Y
'"--.
"-..-...
"'----..
I'.....-...............---~.......-.....~........................ro.....
°ICT~)B~R
2
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
8en6IL
0
4
~
(!)
0:~2::I:
0
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0 10 3
8
6
4
2
10 5
8
6
4
2
104
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IL 6
~
4~
(!)
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0
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0
10 3
8
6
4
2
~
\'--.roo----\roo----....---.......
1"'---..1---
APr LL
..
",""roo--,--,-............-............_-.......
-'-'"".....""'"
'",
SEIPTI~M~ER
10 5
8
6
4
2
10 4
en 8
IL 6~
~4
(!)
0:
~2::I:
0en
0
10 3
8
6
4
2
10 5
8
6
4
2
10 4
en 8
IL 6
0
4~
(!)
0:~2::I:
0en
0
10 3
8
6
4
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
o
ED
00
rCHARGE EQUALLED OR EXCEEDED
:
-
-......---..10_
:-...
IMA~CHI'
30 40 50 60 70 eo 90 10
~CHARGE EQUALLED OR EXC EED
r---....-~
1-t\---"
""'"...
--"I
:\
!\
,U8IUST
30 40 50 60 70 80 90 I
CHULITNA RIVER
- ---TALKEETNA RIVER
LEGEND:
FIGURE E.2.42
MONTHLY AND ANNUAL
FLOW DURATION CURVES
CHU LITNA RIVER NEAR TALKEETNA
TALKEETNA RIVER NEAR TALKEETNA
NOTES:
I.FLOW DURATION CURVES BASED ON
MEAN DAILY FLOWS.
2.PERIODS OF RECORD:
CHULITNA RIVER NEAR TALKEETNA:
FEBRUARY 1958 -SEPTEMBER 1972
MAY 1980 -SEPTEM BER 1981
TALKEETNA RIVER NEAR TALKEETNA:
JUNE 1964 -SEPTEMBER 1981
00
ED
-
......
""I "1\,I ..
'"""-..........
.......----'-
~N~UA~
o 40 50 60 70 80 90 I
CHARGE EQUALLED OR EXCEED
Ul
II..
0
0
0
Q I
~0.9(!)a:0.8~....:J:
0 0.7(/)
Q 0.6
.....0.5
0.4-
0.3
~
-
-
4
3
2
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
.....
"""
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
JANUARY
FIGURE E.2.43
-
4
-3
/
/
~
2
.-
!
(/)
LL.
0
I""'"0 1,3,7 AND 15-DAY HIGH FLOW
0
0 I
0.9~
(,!)0.8.-.It:
<l:
:I:0.7
0
(/)
0 0.6
t-
0.5
0.4
0.3
"'"'
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
.....NOTE;PERIOD OF RECORD WY 1950 -WY 1981.
-
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
FEBRUARY
FIGURE E.2.44
-
4
....,
2
1,3,7 AND 15 -DAY HIGH FLOW
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 19BI.
-
GOLD CREEK
CURVES
AT
FREQUENCY
MARCH
SUSITNA RIVER
HIGH-FLOW
-
FIGURE E.2.45
-
I"""
4
f"""3
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 1981
-
CREEK
CURVES
AT GOLD
FREQUENCY
APRIL
SUSITNA RIVER
HIGH-FLOW
-FIGURE E.2.46
100
r
I
1-DAY -~~
50 HIGH FLOW......I -~~
40 3-DAY ~-
HIGH FLOW
en ~~~
1L 30u
0
0-0
w
~20a::«
,,-~
uen 15Ci
,-
10
9r-
RECURRENCE .INTERVAL (YEARS)-
5
1.05 1.1 2 5 10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
-
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
MAY
FIGURE E.2.47
100
"...
1-DAY
HIGH FLOW ....
50
r-3-DAY
If)HIGH FLOWl.L.40u
0
~0
0-30~
w
(!)
0::
<C,-::cu
If)
0 20
15
10
1.05 1.1 2 5
RECURRENCE INTERVAL(YEARS)
10 20 50
-
-
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
JUNE
FIGURE E.2.48
r-.70
60 I-DAY
HIGH FLOW
r-50
3-DAY
40 HIGH FLOW-)'
30
.,-.
7-DAY
20 HIGH FLOW
......15-DAY
HIGH FLOW
JULY-en
IJ..
()
0 10
0
0-
w
(!)
0:::«100
J:90()
~
0 80
70 I-DAY
60 HIGH FLOW
50
F'"
40
30
,....
I
20-AUGUST
10
1.02 1.05 2 5 20 50
-
RECURRENCE INTERVAL (YEARS)
NOTE:PERIOD OF RECORD WY 1950 -WY 1981
-SUSITNA RIVER AT GOLD CREEK
HIGH-FLON FREQUENCY CURVES
JULY AND AUGUST
FIGURE E.2.49
50201.25 2 5
RECURRENCE INTERVAL (YEARS)
40
30
SEPTEMBER
en
1.J..20u
0
0
Q
1LI
(,l)
a:::«
:I:u 10en
[5 9
8
7
6
5
1.02
-
20
,I""'"OCTOBER""
_...
enr-1.J..
I U
0 10
0 952
8
1LI 7(,l)a:::«6:I:
r-uen
[5 5
r 4
3
r 1.03 1.1 2 5 10 20 50
RECURRENCE INTERVAL (YEARS)
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
SEPTEMBER AND OCTOBER
FIGURE E.2.50
7-6
5
4
--3 7-DAY HIGH FLOW
2
(I'J
l.L
U
0
0
Q
w
(!)a:I«
::I:0.9u
~O.B0
0.7
0.6r
0.5
r 0.4
0.3,....,
0.2
I.05 I.I 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE~PERIOD OF RECORD WY 1950 -WY 19BI.
GOLD CREEK
CURVES
SUSITNA RIVER AT
HIGH -FLOW FREQUENCY
NOVEMBER
FIGURE E.2.51
-.
5
I
-.4,
,....3
2
r-en
lL.u
0
0
0
Iw
~0.9
~0.8u
~07o.
0.6
0.5
0.4
0.3
0.2
./"011---1,3,7 AND 15-DAY HIGH FLOW
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:
PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
HIGH-FLOW FREQUENCY CURVES
DECEMBER
FIGURE E.2.52
I~
4
3
2
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
JANUARY
FIGURE E.2.53
r
I
4r----.-----,----------,r------,---.---,-----,
3
2
-
-
(J)
IL.
U
ooo 1
~09w.
fio;8
~
~0.7
(J)
o 0.6
0.5
0.4
0.3
0.2
1,3,7 AND J4-DAY
LOW FLOW
1.05 1.1
-
2 5
RECURRENCE INTERVAL (YEARS)
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
10 20 50
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
FEBRUARY
FIGURE E.2.54
-
4
3
".,..
2
",..
(f)
l.L.
U I,3,7 AND 14-DAY LOW FLOW-.0
0
2 I
0.9
l.LI
(!)0.8a:::«
I 0.7u
(f)
0 0.6,-
0.5
0.4
0.3
I""'"
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE·PERIOD OF RECORD WY 1950 -WY 1981.
-,
..-
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
MARCH
FIGURE E.2.55
-
F
I 4.-------.,.--...----------.-----------,------.---...------,
3
2
f~
(f)u.
()
0
~0
0 I-
~0.9w
(!)0.8a::
c:l::r:0.7 --()
(f)
Cl 0.6
0.5
0.4
0.3-
0.2 L..--.....l..--L...-..J....---I.__.....l..__L...-_.....J
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
APRIL
FIGURE E.2.56
20 r-------r--.-------------.---------,---,---.---------,
-
10
9
8
en 7
u.
u 6
ooQ 5
w
(!)
a::4«
:I:uen
C 3
2
3-DAY
LOW FLOW
1.05 1.1
7-DAY
LOW FLOW
2 5
RECURRENCE INTERVAL .(YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
MAY
FIGURE E.2.57
50201025
RECURRENCE INTERVAL (YEARS)
50
40
30
(/lu.u
0 20
0
0
IJJ
CDa::<:I:
U
(/l
0
10
9
8
7
6
5
1.05 1.1
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
JUNE
FIGURE E.2.58
-
40
~
30
--
20
15
50201025
RECURRENCE INTERVAL (YEARS)
10
9
8
7
6
5
~~1.05 1.I
NOTE:PERIOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
JULY AND AUGUST
FIGURE E.2.59
502010
SEPTEMBER
2 5
RECURRENCE INTERVAL (YEARS)
1.05 1.1
NOTE:PERIOD OF RECORD WY 1950-WY 1981
2
15
20
10
9
8
7
6
5
~4(I)
LL.
U
0
0
0
IJJ
(!)
a:7<t
:I:
U 6(I)
0 OCTOBER
5
4
3
SUS ITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
SEPTEMBER AND OCTOBER
FIGURE E.2.60
....
....
4
3
2
....
en
LYLOW
LL.
u,...0
0 FLOWQI
0.9
1LI
~
C!)0.8a::
<t:c 0.7uen
c 0.6
~
0.5
....0.4
0.3,..
0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
r
I
.....
NOTE:PERfOD OF RECORD WY 1950 -WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
NOVEMBER
FIGURE E.2.6 I
.....
4r----.---,r--------r-----....----,.....--....-----,
3
2
(/)
LL
U
o8 1
=.0.9
~.0.8
a::
~0.7u
(/)
Ci 0.6
0.5
0.4
0.3
I,3,7 AND 14-DAY LrNI FLOW
.....0.2
1.05 1.1 2 5
RECURRENCE INTERVAL (YEARS)
10 20 50
NOTE:PERIOD OF RECORD WY 1950-WY 1981.
SUSITNA RIVER AT GOLD CREEK
LOW-FLOW FREQUENCY CURVES
DECEMBER
FIGURE E.2.62
18.00
17.00
16.00
15.00
14.00
13.00
12.00
I-w
W
LL 11 ..00
I
I-a..w 10.000
0::
W
~9.00~
8.00
7.00
6.00
5.00
4.00
3.00
•
n
•
.6-
D
/:).•
.6-
b..0
•.6-
•
0•b..o·I•.6-•0
b..•.6-0
I
h .6-•n -••.6-/:)..6-
~0 06.1:::.
u ..
b..6.•.6-D •.6-0
.6-6.0 •/:).
.6-
6..6-•0 •6.
•0 .6-0
6.
6.0 .6-
.6-.6-
1\
D.--f---
0 6.
/:).
.6--
\
6.
2.00
126 128 130 132 134 136 138
LEGEND:
GOLD CREEK FLOW;
•23 ,'400 CFS
o 17,000 CFS
.6-13 ,400 CFS
6.9,700 CFS
z«
:!:
0::
W
Ien
NOTE:
WATER DEPTHS COMPUTED
BY U.S.ARMY CORPS OF
ENGINEERS H EC n COMPUTER
PROGRAM.
MAINSTEM
DEVIL CAN
4
•WATER DEPTHS AT RIVE R
MILE 150.2:
-•24.13 FEET-
0 22.88 FEET
0 •21.95 FEET
0 D..20.68 FEET
•
•
D..
•••~--
0
•D 0
D
••••--••
0 0 •
II ~0 ~~D.....•D..••0 0
0 ••
....~.L::>.••
•0 0
n
•~•~f:!"
•0
u £::,L..>.
~••
~~
,
I
38 140 142 144 146 148 150 152 15
zo:::RIVER MILE ::ll::Z<rw w 0->w ,..c_o:::zzo::()«
()
w
(!)...J«:>I-
0:::W
0 Cl
a..
WATER DEPTHS
NYON TO RM 126
I
1--F_IG_l_JRE E020631
18.00
17.00
16.00
15.00
14.00
13.00
12.00
I-
LaJ
LaJ
LL.11.00
::I:
I-
D..
LaJ
0 10.00
a::
LaJ
!i 9.00~
8.00
7.00
6.00
5.00
4.00
3.00
2.00
•
!
I
•0
0 ...
...
L:::.•L:::.
•
0 •0......
•0
c..L:::.
...•[]
...•
••L:::.
h L:::.-~.....
0 0~......-
L:::.
L:::.
L:::.
NOTE:
WATER DEPTHS COMPUTED BY
U.S.ARMY CORPS OF ENGINEERS
H EC -.IT COMPUTER PROGRAM.MA'INSTEM
RM 126 1
<x:z
I-
W
W
~
...J
i:!
98 100
LEGEND:
GOLD CREEK FLOW:
•23,400 CFS
o 17,000 CFS
...13 ,400 CFS
L:::.9,700 CFS
102 104 106 108
LaJ
(f)
<x:::I:
()
110
•
0
.&
••/::;.
0
0
.&
/::;.•J;.
•
/::;.0-•-
J;.
.....
0 0 J;.•••J;./::;.J;.A •r
••/::;./::;...0 0•
0 J;.1:J00J;.
0 •J;.
J;.!J.
J;.
!J.J;.
6.•!J.•A
0
0
J;.....0
J;.
/::;./::;.
D.
0 112 114 116 118 120 122 124 12
RIVER MILE >-
0::
0::
::::::>u
II WATER DEPTHS
~TO TALKEETNA
6
FIGURE E .2.64
1 1 ~l 1 --~l "')1 J J
WSEL=592.1
SLOUGH FLOW =3 CFS
WSEL=592.15
MAINSTEM =22,500 CFS
WSEL=59t.25
2.0 *MAINSTEM =18,000 CFS
-------~---------------------_../~-".;;.~:~.:"
'\...-WSEL=590.85 ..;::.~:~:,;:.
\.0 MAINSTEM=16000CFS .:-:....
,••'0·*:
WSEL AUG 241 1982=590.00 .~.>~~./>~o
MAINSTEM =12,500 CFS :'.;..~:..~:.
SLOUGH =3 CFS .}.:::"Ct f.::,.....
.''.:'.;.:~::<:;:~~.,'.-:";~':>"i.:~.;;~':''::.:;,:.:;",?~:...::/':,'.",:'lf~~~~~~'~~~t~~j~hf .".;-',.'.'I..~~~~~G~
WSEL=594.1
1"MAINSTEM =32,500 CFS
4.0
---
ADF8G
STAFF GAGE
>::'.<>/;~};;~:"/"
...;.:..;,";'PASSAGE I".1
REACH A
594
593
592
~
~591u.-z
Q 590
~>~589
UJ
588
587
-5+00 0+00
(MOUTH)
5+00 10+00
NOTES:
\.MOUTH OF SLOUGH AT STATION 0+00.
2.SELECT MAINSTEM DISCHARGES
MEASURE,D AT GOLD CREEK.
DISTANCE (FEET)
BACKWATER PROFILES AT THE
MOUTH OF SLOUGH 9
SOURCE:TRIHEY 1982 FIGURE E.2.65
401520253035
MAINSTEM DISCHARGE AT GOLD CREEK (1000 CFS)
-/
l-V
f-/,
l-V
)
l-I
f-V
J
-/
-V
.J
f-I
~I
I
I
/
590.0
589.5
10
594.0
I-w
W
IL.
en 593.0
:::r:
C,!)
~
9en
u..o
:::r:....
~o
~
w:::r:592.0....
!;i
z
Q....
~w
~w
w
()
~591.0a::
~en
a::w
~~
OBSERVED WATER SURFACE ELEVATIONS AT
MOUTH OF SLOUGH 9 FOR ASSOCIATED
MAINSTEM DI,SCHARGES AT GOLD CREEK
DATA SOURCE:ADF a G 1982 FIGURE E.2.66
1 1 -,1
LEGEND:
-..-DAILY AVERAGE AT DENALI
~DAILY AVERAGE AT VEE CANYON
A DAILY AVERAGE AT SUSITNA
STATION (S.ELECTED DATES)
OCT.
..
..
SEP.
..
..
AUGUST
..
JULY
..
,f(
\
~~
I I'\
I M \
I I "~.'~'"f~It 1 I If'~II
" ,1 I I I"\'l..I '''','"~,",I r \I"I 1 I l',l,II '-I .,I I r ,,'""-"-'",,,,"~'"-'\jlt.J Ii ,,',I " I 'I +1~"
Ii I"\,,,I I \"~·10 \:\'\
~I ,f \'I "
I ,I 11 \ ,I J'
I I'll •I f \'1"
I j ,I \•I \,.
I r 'l...l ~.'I ,;It
I I W ~JIIIII~J \
oJ ~
14
13
12
II
10
-9u
0-8
w ~..f ~0:f I=>7 I I
l-I I
<{,
a::6 I
W ,
a.T4
~5 ,i,
W I
l-I
4 •I
3+~IfII
"III"II
2+/~J
f
I
I
J
I
0
MAY JUNE
SUSITNA RIVER WATER TEMPERATURES
SUMMER 1980
DATA SOURCE:USGS FIGURE E.2.67
'I J
LEGEND:
--e--DAILY AVERAGE AT DENALI
............DAILY AVERAGE AT WATANA
T II ~r ~..fIlt'I ~1\II , I
r II,+\'...t I ~
(I : I ~I ~~I ~~!I I~~~
II,1\il Ill..I 'I I ,f ~r~I,',~f ~~I ~1 f I 'NJ~I\lilt I,~M \I I'\""~I I M I ~\I I fU I I
'I \,,,~.;;;\I ¥~,~I I I I I I
"\,1 II I I 1 Il'W '.f I~,~I ~!~~'~/~\ ,T f,'l{\I"I"'~/,'11M~II ~I 'tr I ,I \'~¥\I\~I II ~
,~\;\"~~I ,.~\,~~I I I ...~~\
,I U \
I ~
\,
~,
I
\
I
~,
\
\..:
14
13
12
II
10
9-u
0 8-LLJ
0:::
::J 7....ex
0:::w 6
a..
::IEw 5....
4
3
2
MAY JUNE JULY AUG.SEP.
SUSITNA RIVER WATER TEMPERATURES
SUMMER 1981
DATA SOURCE:USGS AND R8 M FIGURE E.2.68
J J ~]OJ ~l J 1
121 I I I I I
101 I I I I --4
LEGEND:
•WEEKLY AVERAGE TEMPERATURE
81 ~liii~~i~~fiI::l!J ENVELOPE OF WEEKLYo'::::::::::::,::::::::MAXIMA AND MINIMA
o
I&Ja::~61 l'r---t----+---l--cr I
a::
I&J
Q.
2
I&J~41 1 I I I U
21 I I I I I
01 I
AUG.SEP.JUL.JUN.FEB.JAN.DEC.OCT.NOV.
,,I I ,,,,!,,,,,,
o 4 8 12 16 20 24 28 32 36 40 44 48 52
WEEK
MAR.APR.MAY
MONTH
SUSITNA RIVER AT WATANA
WEEKLY AVERAGE WATER TEMPERATURE
1981 WATER YEAR
FIGURE E.2.6 9
15 15
(.)
o =:------------...........................
...............
=:-------
OL...--==------"""":":!'=----...-o::'-:-:---"":"":!~26 137 224
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE)-6/1/80
o.....-:2:-1:6~-----1:-=3:"i:7:------"":"":!~--~
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE)-6/IS/80
---------~~-~,...
',~,..."........
",
""
--------
0 ............L...l..-....L...~
26 137 224 291
SUSITNA GOLD CK.VEE CYN.DENALI
LOCATION (RIVER MILE)-7/15/80
15
(.)
o----------------~------------....,--~
......................-....;
OL...-~-----~.I.......---~~--.......,j~26 137
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE)-7/1/80
15
15 r---,....------or-------~--___,~ISr--~-------r--...........----r----"'I""'I
(.)
o
a.:
~
1IJ
I-
----~---~
----------~--.....'...................,
'...,....,
.....
(.)
o
a.:
::!:w
I-
OL...-......."'--...r....-__---'~
26 137 224
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE)-8/1/80
OL...-~-----~----..I----.I-I26137
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE)-8/15/80
15 15
(.)
o
a.:
~
W
I-
O __~-----~==----__:~--""""="~26 137 224
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE )-9/1/80
(.)
o
a.:
::!:w
I-
O.....~~----~-=----~~--""""="~26 137
SUSITNA GOLD CK.VEE CYN.
LOCATION (RIVER MILE )-9/15/80
LEGEND
----MAXIMUM
----MEAN
-------MINIMUM
NOTES
I.)ALL TEMPERATURES WERE RECORDED BY THE USGS WITH SINGLE
THERMOGRAPHS AT EACH SITE.
2.)GOLD CREEK'S TEMPERATURES WE RE INFLUENCED BY TRIBUTARY
INFLOW AT THE SITE AND THEREFORE WERE NOT INCLUDED.
3.)DAILY MEAN TEMPERATURES COMPUTED AS AVERAGE OF MINIMUM
AND MAXIMUM FOR THE DAY.
SUSITNA RIVER -WATER TEMPERATURE GRADIENT
SOURCE:USGS FIGURE E.2.70
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
•MAXIMUM
I
I /
I
\
I-~••....•..
..
--..
I ......
u
....-
49 49 054 21 65 9 25 3 5 17 5 27 3 22 6 4 10 2 12 I 7 --
D V G C T 8 85 D V G C T 8 88 0 V G C T 8 88 --
I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
u
~
wa:::
::l
~a:::w
'l.5.0
2:w.....
0.0
10.0
I.A.~13.0
I .A.-----'15.0
SUMMER WINTER t3REAKUP
2.MAXIMUM VALUES OF f2°C AT DENALI ON JUNE 4 AND 5 1 1980;
15.0 OC AT GOLD CREEK ON JULY 3 AND 4,1979;AND 16.5 °c
AT SUSITNA STATION ON JULY 9,1976 HAVE BEEN RECORDED
BY USGS CONTINUOUS RECORDINGEQUIPMENT1 HOWEVER
THESE WERE NOT INCLUDED IN THE ABOVE COMPILATION.
ONLY DISCRETE OBSERVATIONS WERE UTILIZED SINCE
CONTINUOUS RECORDERS ARE NOT PRESENT AT EACH STATION
THROUGHOUT THE BASIN.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 8-SUNSHINE S8-8USITNA STATION
NOTES:
I.A.CRITERIA:SHALL NOT EXCEED 20°C AT ANY TIME.THE
FO'LLOWING MAXIMUM TEMPERATURE SHALL NOT BE
EXCEEDED WHERE APPLICABLE:MIGRATION ROUTES AND
REARING AREAS--150C,SPAWNING AREAS AND EGG
AND FRY INCUBATION--13°C (ADEC,1979).
I.B.o ESTABLISHED TO PROTECT SENSITIVE IMPORTANT FISH
SPECIESl.JAND FOR THE SUCCESSFUL MIGRATION..l SPAWNING,L
EGG-INC BATIONJ.FRY-REARING,.J AND OTHER REI"'ROOUCTIVt.
FUNCTIONS OF IMPORTANT SPt.CIES.
SOURCE:USGS
DATA SUM MARY -TEMPERATURE
FIGURE E.2.71
\7.o.o.
SLOUGH 21 •
• 0o.
NOTE:RM =RIVER MILE
---"-----L...L~M..;.;.;.ATCHLINE
YSI SURFACE - -\l
.YSI INTERGRAVEL -•
h,RECT,ONtOFFLOW
.4 DEVIL CANYON:
/~10 RIVER MILES
INSTRUMENT LEGEND:
RYAN SURFACE - - -0
RYAN INTERGRAVEL--.
DATAPOD SURFACE - -0
DATAPOD INTERGRAVEL-.
SLOUGH 8A \7 •
•SLOUGH 9 o.
'0.
SHERMAN CREEK
MATCH L1NE-~-
FOURTH OF
JULY CREEK
DIRECTION
OF FLOW
RM 130
LOCATION MAP FOR 1982
MIDWINTER TEMPERATURE STUDY SITES
SOURCE:TRIHEY 1982 FIGURE E.2.72
SLOUGH 21
(RM 142)
SUSITNA RIVER AT PORTAGE CREEK
(RM 149)
1000 1600 2200
TIME
AUG 31-SEP 6
400
I I I I I I
I I
~--..........
t--
f--
I I r I I I I4
10
08
~
0.:
~w 6
I-
1000 1600 2200
TIME
AUG 31-SEP 6
400
o 8 1----+-----+-----+---+__----1
~
0.:
~w 6 I-----+----t-----,,...----'-/------'"Iild---t
~
8
<.>o
~6
~w
~
4
I I I I I I I
I
,....
/~-
_V ""'-....-
"""-
I I I I I I I I
8
<.>o
~6
~w
~
4
,I I I I I I I-r-----.---
.--
I I I I I I I I
400 1000 1600 2200
TIME
SEP 7 -13
400 1000 1600 2200
TIME
SEP 7-13
8
~
0.:6
~w
~
4
I I J I I 1 I I
""""-
/
-./,"'-I'---
I I I I I I 1 I
8
~
~6
~w
I-
4
I I I I I I I I
--
--
I I I I I I I I
400 1000 1600 2200
TIME
SEP 14-20
400 1000 1600 2200
TIME
SEP 14-20
1000 1600 2200
TIME
SEP 21-27
400
I I ,I I 1 I I
r--
--_...
....-
1 1 I I I I I I2
<.>6
~
a.:
~4
I-
8
1000 1600 2200
TIME
SEP 21-27
400
<.>6 t----+----'----'-/-----+---+-----I~
cL
~
~4 r-+-lIIIIiiiii;;;;;;;;;;;;....~-----t-----F=--__1
FIGURE E.2.73
COMPARISON OF WEEKLY DIEL SURFACE WATER TEMPERATURE
VARIATIONS IN SLOUGH 21 AND THE MAINSTREAM
SUSITNA RIVER AT PORTAGE CREEK
1981
SOURCE:ADAPTED FROM ADF a G 1981
OJ 1 1
SUSITNA RIVER DAILY AVERAGE
TEMPERATURE,RM 126.1
(BASED ON PRELIMINARY
DATA FROM ADF8G)
INDIAN RIVER DAILY AVERAGE
TEMPERATURE NEAR MOUTH
(BASED ON PRELIMINARY
DATA FROM ADF a G)
- ---PORTAGE CREEK DAILY AVERAGE
TEMPERATURE NEAR MOUTH
(BASED ON PRELIMINARY
DATA FROM ADF a G )
LEGEND:
,"\
\
)\.v~\
. L j 1\\~
f
-V : \/.""-J!I \,.r
r................\F\1~.1 """'v ~~.\,./•I \I \
1,;
'"\1 ,
.I \
",...,~"I
\
.~~V"I \",\\I1/'i'I Y"\\I
,--'/',,\I \oJ
1 \1 ,I
J \'\'/'~-'\I 'I
15
14
13
12
II
10
9
ta
w
Il::
~7
c:r
Il::
W
£1.6~wr-
5
4
3
2
301020
SEPTEMBER
311020
AUGUST
31
JULY
10 20301020
JUNE
o 'I I ,,I ,I I ,!I !
I
SUSITNA RIVER,PORTAGE CREEK AND INDIAN RIVER
WATER TEMPERATURES SUMMER 1982 FIGURE E.2.74
15
13 '.\\.,
\
1 I
SUSITN
BELOW
(.)
~
L&J 9a::\I!,
::),..-\.«I .,~VI ,
a::,NOL&J I ('0 I ---a...\:,--~•\I ,----L&J "'--"-..-,'..
V
7
"-......
"-"-......
......
5
:3
I
8 16
JUNE
24 2 10
JULY
18
SOURCE:ADF 6G 1982
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 8 DAYS.
2)CHULITNA DATA FOR JULY PROVIDED BY USGS
FROM -CHULITNA GAGE 18 MILES UPSTREAM
OF CONFLUENCE.
COMPARISON OF 19E
AND SUSITNA RIVE
SUSITNA RIVER ABOVE CONFW~NCE
---
CHULITNA RI ER
ABOVE CONF UENCE
DATA
26 3 II 19
AUGUST
27 4 12
SEPTEMBER
20
MONTH
82 TALKEETNA,CHULITNA,
ER WATER TEMPERATURES
LEGEND:
_.-SUSITNA RIVER ABOVE CONFLUECE
(RM.103.0)
----SUSITNA RIVER BELOW CONFLUENCE
(RM.83.9)
-••..!...TALKEETNA RIVER IMMEDIATELY
ABOVE CONFLUENCE
CHULITNA RIVER IMMEDIATELY
ABOVE CONFLUENCE
----NO DATA
FIGURE E.2.75
-
20
18
16
i="w
W
lL..
(!)w
3:
...J«::r:14~
w
~
([)«
z
0
~>12w
...J
W
...J
W
>W
...J
0:::
W
~«103:
/
~
I
///
/
/V
/1/v
/
/,
V/
rf
/
0
)(4
I
0
0
-
8
6
o 10 20 30
DISCHARGE (1000 CFS)
40 50
LEGEND:
X FIELD MEASUREMENT OCT.7,1980
(RaM 1982d>'
o FIELD MEASUREMENTS ADF8G 1982.
-HEC -2 COMPUTED RATING CURVE.
FIELD MEASUREMENT DEC.3,1980
EJ DURING ICE COVER PROGRESSION
(R8M (982d).
HYPOTHETICAL ICE COVER RATING CURVE
- - -WITH FREEZEUPAT DEC.1980 DISCHARGE.
NOTE:ICE COVER RATING CURVE IS AN ILLUSTRATtON
ONLY AND IS NOT INTENDED TO REFl-ECT ACTUAL
CONDITIONS.
ICE AND OPEN WATER STAGE-
DISCHARGE RELATIONSHIP,LRX-9,RM 103.2
FIGURE E.2.76
J 1 1
FINE GRAVEL MEDIUM GRAVEL
VERY FINE COARSE GRAVEL
GRAVEL 60 VERY COARSE GRAVEL SMALL COBBLES LARGE COBBLES
0/6 050 084
~(MM)(MM)
25 54 113
19 43 100
13 31 68
32 59 110
33 64 122 1 I
28 49 84
19 43 100
LRX~29LRX-31
CROSS-SECTION
LRX-26
LRX-27
LRX-28
LRX-29
20 I I }/I :I I ILRX-30
LRX-31
LRX-32
50 1 I I }'I I 7 L I /I I I I
40 1 I } I ,L'I7"7 I I I I
en
LL
U
§
::.301
w
(!)
~1~I~I~ICl I
I
10 I QLf I v-'I I I I I I I I
0'I ,!!!,
o 20 40 60 80 100 120 140 160 180
MEDIAN DIAMETER OF BED MATERIAL MOVED (MM)
SOURCE:RaM 1182
BED MATERIAL MOVEMENT CURVES LRX-28.29.31.35 FIGURE E.2.77
1 1 -1 -,
o
6000
,
D
~4000
en
~zw
2owen
c
~2000z
tAl
Q.en=>en
...Jg
~
)
,
u
,
4
.,.
t
-.-~t "'I n
_II..~n It 4t ••~n
•••...........0 ~•~~
,
45 46 72 20 54 5 21 2 !5 16 6 24 2 19 8 :3 15 3 12 1 5 1->-
D V G C T S
S:;D V G C T S SS 0 V G C T S SS r-r-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTE:
I.A.CRITERION:NO MEASURABLE I NCREASE ABOVE NATURAL
CONDITIONS (ADEC 1979).
I.B.ESTABLISHED TO PREVENT DELETERIOUS EFFECTS ON AQUATIC
ANI MAL AND PLANT LIFE,THEIR REPRODUCTION AND HABITAT.
2.AT GOLD CREEK,2 WINTER OBSERVATIONS WERE LESS THAN THE
DETECTION LIMIT OF 1.0 mg./I.
DATA SUMMARY-TOTAL SUSPENDED SEDIMENTS
SOURCE:USGS AND RaM FIGURE E.2.78
~)1 ~.~..J )1 J
50
40
30
20
enLL 10(.)
0 9
0 80-7-w
(!)6a:::<r
:J:5uen
a 4
3
2
.-"V ~
V v ".,..
~~
~~~~
",.-"'~......
./-V~~...1'.......V .......
l---"",..
SUSITNA RIVER AT ,........,..."""""""~".,..~",..~SUSITNA RIVERGOLDCREEK~.....-",..NEAR DENALIV~",..
.",-.......~~;'
..io""
~~f'-SUSITNA RIVER V VV
V NEAR CANTWELL
",.
,/~(VEE CANYON),/.....
V V !"""""~.....
V V ~/1-'"...1000".....
.L...~"~.-""""V"......./',,'~-
L ....-L'~MACLAREN RIVER~--""NEAR PAXSON,...,.....~V'",.,...
./
V V V
/'/""/V
~V V-
~
~
I
IPOO
SOURCE.R 8 M 1982
2 3 4 5 6 7 8 9 10,000 2 3 4 5 6 7 8 9 100,000
SUSPENDED SEDIMENT DISCHARGE (TONS /DAY)
SUSPENDED SEDIMENT RATING CURVES
MIDDLE AND UPPER SUSITNA RIVER BASINS
2 3 4567891
FIGURE E.2.79
)1 -1 -J 1
,.,I~
V
LEGEND:
,~V §-----SUSITNA NEAR DENALI ,,~
------SUSITNA NEAR CANTWELL ~V ~V
SUSITNA AT GOLD CREEK
~.~
------MACLAREN NEAR PAXSON /,1#V
~!-,~~'lr1
l/V ,ioo"""....oC1
L..,..oo Io~...1-0
~r;::~...
-C...._:.
~to;;....-::..l ~-..
--~
L..c ~~~~....
~-e:-,..-
~~a..::to"".,----~...
E~..._......
10---
99.5
99
99.9
99.8
98
95
90w
Nu;
c 80w
5 70
5 60~
z 50<X
J:
I-40
a:::
~30
ii:
I-20zwua:::w 10a..
5
2
I
0.5
0.2
0.1
0.001 0.01 0.1
PARTICLE SIZE (MILLIMETERS)
1.0
SUSPENDED SEDIMENT SIZE ANALYSIS
SUSITNA RIVER
SOURCE:ALASKA DISTRICT CORPS OF ENGINEERS 1975 FIGURE E.2.80
1 -1 1 1 1 ])1 J
1500
S 1000
t-z.....
>-I-
0
m
D::
~500
I-
o
,~'I ~~b
--
4~
•••.,.
•....
~~t 0 ~O·•-
-_1.--_..
0 18 27 13 15 21 18 0 4 !5 0 0 3 13 0 I 3 0 0 0 5 1--......
D V G C T 5 55 D V G C T S 5S D V G C T S 55 r-r-
I I I J I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 55 -SU51TNA STATION
NOTES:
I.A.CRITERION :SHALL NOT EXCEED 25 NTU ABOVE NATURAL
CONDITIONS (ADEC 1979 ).'
I.B.ESTABLISHED TO PREVENT THE REDUCTION OF THE
COMPENSATION POINT FOR PHOTOSYNTHETIC ACTIVITY,
WHICH MAY HAVE ADVERSE EFFECTS ON AQUATIC LIFE.
DATA SUMMARY -TURBIDITY
SOURCE:USGS AND R8 M FIGURE E.2.81
200~----...,...---.....,.....---r--...,...----,-----,.-......,....-------r---r---.,....----,-...,....-~----t
-
NOTES:
T =0.185 (SC )0.998
r 2 =0.92
T=TURBIDITY
SC =SUSPENDED SEDIMENT
CONCENTRATION
A/
150 1-------+----+----+--+----+---+-----I------+----+-----I--+-0='".-+~_.-A-7If------4
/~100~-----+----+----+---+---+----+---+--------:;0....--t---H~~--+-~/'---t--t----4
/~80 t------_+_---+--__+_-_+___+-___+-__+_------t---t----+-r-----t--t-----+-----f
A/0
60 I------_+_---+----+--+---+-----+---+--------+---h£---+-----tr----t-----+-~
/
v
40t------_+_---+--__+_-+---+-----+--+-----=A=-----+-7iC-----+----+---+---+--t-----I/
/~
30 t------+----+----+-------+-----+-----+----+--~J""_x__+-------l---+--__+__--+--____f_____I/8
-20 I--------+------+----+---+----+-----+---+-+-------+---+---+------Ir----+------I---I~~(
~.~~
~10 I--------+----t-----+--.;-;IA-"'/L-t-----+---+--------t
&/V'
8 t------+-----t-----+-/+--+----+---+---+--------+---I---+-----+--+-----+------I
6 I------+-------+--:.I'/"----------I---+-----+-----+-----+-------+---~-+---__+__f---_+_____I//
41-------+-/-.I'----+----+--+---+----+---+-------+-----+-----Ir-----+--l---+----1
3 /
2 !---7'/t...-----+-----t-----+--+----+---+-__+_LEG END:
V &-SUSITNA RIVER NEAR CANTWELL
G -SUSITNA·RIVER NEAR CHASE
X -SUSITNA RIVER AT GOLD CREEK
I ~---L..--..L------L.....----L...--....L----l------l_-L...-I------l.....1------I---1---L-I.....l.....--..----J.I
\0 20 30 40 50 60 80 100 200 300 400 500 600 800
SUSPENDED SEDIMENT CONCENTRATION (mg/1)
TURBIDITY VS.
SUSPENDED SEDIMENT CONCENTRATION
SOURCE;PERATROVICH.NOTTINGHAM AND DRAGE 1982 FIGURE E.2.8 2
')
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
15.8
.~
)u t
-~
•••n
.~
.~
I ~-".
-....
4
U
I
t·
I
-.
0 7 19 0 29 5 13 0 4 8 0 15 3 14 0 I 3 0 4 0 4 1-1-
0 V G C T 5 55 0 V G C T S 55 0 V-G C T 5 55 1-1-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
8.0
10.0
12.0
14.0
zw
(!)
>-xo
Clw
~o
CJ)
CJ)
Cl
..........
Ct
E
I.A.-----.
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S -SUNSHINE S5 -SU51TNA STATION
NOTES:
I.A.CRITERIA:GREATER THAN 7mg./1.,BUT IN NO CASE SHALL DISSOLVED
OXYGEN EXCEED 17mg./I.(ADEC 1979).
I.B.ESTABLISHED FOR THE PROTECTION OF ANADROMOUS AND
RESIDENT FISH.
DATA SUMMARY-DISSOLVED OXYGEN
SOURC E:USGS AND RaM FIGURE E.2.8 3
1 )1 1
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
-t
H
~
-l-
I";..
-I--,U
l U
I -I-l~
-~
t
n
•
-
-~--~-
a 7 15 a 8 2 9 a 4 8 a 6 3 7 0 I 3 a I a 2 1--
0 V G C T 5 55 D V G C T 5 SS 0 V G C T S SS t-t-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
80
100
120
zw
(!)
>-xo
cw
~o 60enen
o
zo
~
0::
::::>
~en
~o
I.A.
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 55 -SUSITNA STATION
NOTES:
I.A.CRITERION:THE CONCENTRATION OF TOTAL DISSOLVED GAS SHALL NOT
EXCEED 110 %SATURATION AT ANY POINT.lADEC,1979).
I.B.ESTABLISHED FOR THE PROTECTION OF ANADROMOUS AND
RESIDENT FISH.
DATA SUMMARY -DISSOLVED OXYGEN %SATURATION
SOURCE:USGS AND R Ii M FIGURE E.2.84
-10
CO
(\J
W
•W
0:
:::)
(!)
i:i:
r-
0ro-
•--w
w •(!)(!)
0:a::«0:r:8 «(,)
F"'"(J):::c
0 u--(/)
in
"!0
0 10
+(\J (/)co
.0 >
0 •••-II ZIIl'l"""i='«0
(J)~':l!.~a::
::::>-tien....(/)u
0
0 I-0•o~Z
(\Jw W
(!)U0:«a:::r:
(,)W~a..0
•-en«
•(!)
•cw
•~•0
~••en
••~(/)
•-•0
••....J
•~•• •••0
••••l-•••••••
Q
Q
(NOlol\f~nol\fS olN3~~3d)SV9 03AlOSSIO 'VolOol
10o
1 j )J J 1 J
-
":-
01
E-n:-
(J)
:Ja::oza..
~za..
...J
~
~
I.A.
1.1
I
•
U •
4.
4.
!..~
.....nu..lr 4'~4 .1-.r 0 ••~I~"U ~
0 10 23 0 23 6 23 0 4 II 0 17 4 20 0 I 3 0 6 0 7 1-1-
0 V G C T 5 S::i D V G C T S 55 0 V G C T 5 55 1-1-
I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I rl~TJ I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
4.AT SUNSHINE)2 WINTER OBSERVATIONS WERE LESS THAN 0.01 mg./1.
5.AT SUSITNA STATION)2 WINTER OBSERVATIONS WERE LESS THAN
O.Olmg./l.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES:
I.A.CRITERION:LESS THAN 0.01 mg./1.FOR ELEMENTAL PHOSPHORUS (EPA
1976).
LB.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
2.AT VEE CANYON ,4 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS,
AND THE I BREAKUP OBSERVATION WERE LESS THAN 0.05 mg./1.
3.At GOLD CREEK)6 SUMMER OBSERVATIONS,3 WINTER OBSERVATIONS)
AND I BREAKUP OBSERVATION WERE LESS THAN 0.05 mg./I.
S-SUNSHINE 55 -SUSITNA STATION
DATA SUMMARY -TOTAL PHOSPHORUS
SOURCE:USGS AND RaM FIGURE E.2.86
J J 1
0.6
..
........
0
E-a-
(J)0.4
<t
LLJ
tixa..
(J)
0
~a-
0 0.2
x
I-
0:::
0
0.0
:1
til
~,"'J~••....U "!Ito I ."
~
0 9 27 0 II 3 I 0 4 8 0 4 I 2 0 I 3 0 0 0 I 1-1-
D V G C T S S5 D V G C T 5 SS 0 V G C T S 55 1-1-
I I I I I J I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
3.AT GOLD CREEK,13 SUMMER 'OBSERVATIONS WERE LESS THAN 0.02 mg./1.
2 WINTER OBSERVATLONS AND 2 BREAKUP OBSERVATIONS WERE LESS
THAN THE DETECTION LIMIT OF 0.01 mg./I.
4.AT SUSITNA STATION,THE 2 WINTER OBSERVATIONS WERE LESS THAN
0.02 mg./I.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES;
I.NO CRITERION ESTABLISHED.
2.AT VEE CANYON,7 SUMMER OBSERVATIONS WERE LESS THAN 0.05 mg./1.
2 WINTER OBSERVATIONS AND THE I BREAKUP OBSERVATION WERE LESS
THAN THE DETECTION LIMIT OF 0.01 mg./I.
S-SUNSHINE ss -SU51TNA STATION
SOURCE:USGS AND R8 M.
DATA SUM MARY-ORTHOPHOSPHATE
FIGURE E.2.87
1 -)·-~l I J
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
)
)
,
II
U
U •-I-.~.n ..~..~H ..oil-~,Il'
I OiJo •<I1i1o •...U •~
'-----
II 19 71 6 31 0 I 3 4 30 4 II 0 I I 2 9 0 10 0 0 1-1-
0 V G C T S SS 0 V G C T S SS 0 V G C T S SS 1-1-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
2.0
3.0
1.0
0.0
z
en
<C
Z
IJJ
CDoa:
~
z
IJJ
~
<Ca:
~
z
..........
o
E
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 5S -SUSITNA STATION
NOTES:
loA.CRITERION:LESS THAN 10mg./I.(EPA 1976).
LB.ESTABLISHED TO PROTECT WATER SUPPLIES.
2.AT VEE CANYON,5 SUMMER OBSERVATIONS,3 WINTER OBSERVATIONS,
AND I BREAKUP OBSERVATION WERE LESS THAN THE DETECTION
LIMIT OF 0.10 mg'/I:
3.AT GOLD CREEK,6 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS
AND 2 BREAKUP OBSERVATIONS WERE LESS THAN THE DETECTION
LIMIT OF 0.10 mg./1.
DATA SUMMARY -NITRATE NITROGEN
SOURCE:USGS AND RaM FIGURE E.2.88
1
300
-
~
Ct
.§.
en
0 200:J
0en
0
UJ>...J
0enen
0 100
...J
~
0
~
o
It ....
-l-•It -..,
~r-..•,....~
.~".-~...
.!n
-
0 \0 59''6 39 8 24 0 4 23 0 19 4 20 0 I 8 0 10 0 7 --
0 V G C T S SS 0 V G C T S S8 0 V G C T S SS --
I I I I I I IJ I I I I I J I I I I I I I I I I I I I I I I I I I I I I J I J I I I I I I I I I J J I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.A.CRITERION:1,500 mg./1.(ADEC 1979).
I.B.ESTABLISHED TO PROTECT NATURAL CONDITIONS OF
FRESHWATER ECOSYSTEMS (500 mg./1.IS THE CRITERION
FOR WATER SUPPLIES).
DATA SUMMARY -TOTAL DISSOLVED SOLlDS
SOURCE:USGS AND RaM FIGURE E.2.89
1 1 "1 1 »
400
uo
10
C\J
~300
E
~
IIIo.s:::.
E
:::J->-
t:200~
I-
U
::::>
Clzou
100
467
•
•~.
0 ••••..
.~,
I.-~
U
I.~4
•~..,.,4~.--I-t ..,"•t•
.~411-
~•..
•
32
18 29 81 14 73 9 27 3 5 37 5 31 3 22 I 3 9 2 18 0 7 --
D V G C T 5 55 D V G C T 5 55 0 V G C T S 55 --
I I I I I I I J I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
DATA SUMMARY -CONDUCTIVITY
SOURCE:USGS AND R6 M FIGURE E.2.90
)J )1 1
60
40..
........
0
E-
I.LJ
I-
ft
~20:::>en
o
.,
n
~~
•I
•-..."'"o!~......-n It
.~
I-••U •0
,.,....
••••,,
~
II 19 78 6 62 9 25 3 4 33 4 29 4 21 I 2 9 0 16 0 7 f-r-
0 V G C T 5 5S 0 V G C T S SS 0 V G C T 5 S5 f-r-
I J I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.A.CRITERION:SHALL NOT EXCEED 200mg./1.(ADEC 1979).
\.B.ESTABLISHED TO PROTECT WATER SUPPLIES.
2.AT GOLD CREEK,I SUMMER OBSERVATION AND I BREAKUP OBSERVATION
WERE LESS THAN 5.0 mg./I.
3.AT TALKEETNA)I SUMMER OBSERVATION WAS LESS THAN 1.0 mg./1.
DATA SUMMARY-SULFATE
SOURCE:USGS AND R6 M FIGURE E.2.91
30
20
.......
C.
E-10LLJ
0
a:::
0
..J
:::I:
U
0
I._-\
-ll".
l·~
•l'l
r-.~I-I-I ...
I·,.l'j'4'1"1"'".j l
4t ..~
I ~,I olio I1·,-
-III19746629243433429421 I 2 9 0 16 0 7 r-r-
0 V G C T S S5 0 V G C T S SS 0 V G C T S S5 r-r-
I I I I I I I I I II I I I I I I I I ~iLJ I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.A.CRITERION-.LESS THAN 200 mg /I (ADEC 1979).
I.B_ESTABLISHED TO PROTECT WATER SUPPLIES.
2.AT VEE CANYON,3 SUMMER OBSERVATIONS WERE LESS THAN
THE DETECTION LIMIT OF 1.0 mg/I
3.AT GOLD CREEK,2 SUMMER OBSERVATIONS WERE LESS THAN
THE DETECTION LIMIT OF 1.0 mg II,
DATA SUMMARY-CHLORIDE
SOURCE:USGS AND R8 M FIGURE E.2.92
60
-
'"400.
E-Q
LiJ>..J
0
f/)
~20Q.-"0-2
=>
0..Jex 00
•
t •U
l
I-~
n It
t .~-It•.~
t -••1-"".~..n I l•....-~••It
~~n
l U ..••...
U n
l
n ~
II I~74 6 61 9 25 3 4 33 4 32 4 21 I 2 9 0 16 0 7 1--
0 V G C T S Sti D V G C T S SS D V G C T S SS --
I I I I I I I I I I I I I I I I I I I
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
2.(d)=DISSOLVED
DATA SUMMARY -CALCIUM (d)
SOURCE:USGS AND RaM FIGURE E.2.93
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
)
.~
4
•t •••I·~
l •,
•..".~•4 .~4~•••••••..l
4 4 •U 4r •••
I •,
..
II 19 74 6 61 9 25 1 3 4 33 4 32 4 21 I 2 9 0 16 0 1 1-1-
D V G C T S SS,D V G C T S SS D V G C
T S SS 1-1-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I
5.0
0.0
-=
15.0
a
~10.0
...Jo
C/)
C/)
a
........
0.
E
at
2:-2
=>
Cii
L&I
Z
(!)
~
~
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE SS -SUSITNA STATION
NOTES:
I.NO'CRITERION ESTABLISHED.
2.(d)-DISSOLVED.
DATA SUMMARY-MAGNESIUM (d)
SOURCE:USGS AND R8 M FIGURE E.2.94
30
-
~20aae-c
lLl
~
0
rJ)
rJ)
~10a
~
~
:2c
0
rJ)
0
!-l-
~..
-I-
.1'-
•..
-......io ••.,..,...~~~n
••U r'~H •I
.r,,~,•-
I
I '---
II 19 ·64 6 61 9 25 3 4 27 4 29 4 21 I 2 7 0 16'0 7 1--
D V G C T 5 55 D V G C T 5 5S·e V G C T 5 55 f---
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I J I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 5-5UNSHINE S5-SU5ITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
2.(d)-DISSOLVED
DATA SUMMARY-SODIUM (d)
SOURCE:USGS AND R 8 M FIGURE E.2.95
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
•MAXIMUM
I
I
4
~..
I .
"..,
.~"","n u
n n •'"'~.~•.~.,
"II
I
II 19 64 6 61 9 25 3 4 26 4 29 4 21 I 2 7 0 16 0 7 1-1-
D V G C T S SS D V G C T S 55 D V G C T 5 55 f--f--
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I J I I I I I I I I I I I I I I I I I I I
0.0
2:
:::>
enen
<I
ba.
15.0
cw
~oenen
C
'Q'5.0
........oE 10.0
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE SS -SUSITNA STATION
NOTES:
I.NO CRITERIoN ESTABLISHED.
2.AT VEE CANYON I I SUMMER OBSERVATION AND I WINTER OBSERVATION
WERE LESS THAN THE DETECTION L1MrT OF 1.0 mg./I.
3.(d)=DISSOLVED
DATA SUMMARY-POTASSIUM (d)
SOURCE:USGS AND Ril M FIGURE E.2.96
170
........o
E-
'pi)120ou
"u
U)
<I
U)
U)
UJ
Z
o 70a:
<I:x:
20
•
..~
.~•I ••
n
4
4 4-.-It
.~••U •4 ,.~-4'4'.~•.~,.
4
":II
•••
4 4
-'--..
19 9 73 6 62 9 25 4 0 33 4 29 4 21 2 I 9 0 16 0 7 1-1-
D V G C T 5 5~D V G C T 5 55 0 V G C T 5 55 I-~
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 5S -SUSITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
2.SOME METALS HAVE VARIABLE SYNERGISTIC EFFECTS WITH HARDNESS,DEPENDENT
ON THE PREVAILING HARDNESS IN THE WATER.THE CRITERIA FOR CADIUM J FOR
EXAMPLE,ARE 0.0012 mg./1.IN HARD WATER AND 0.0004 mg./1.IN SOFT WATER.
DATA SUMMARY -HARDNESS
SOURCE:USGS AND RaM FI GURE E.2.97
9.0
8.0-Ien
~
~IA.
::t:a.-
:I:I 1.0a.
6.0
\
,
.
.
II 19 74 6 65 7 2~3 4 34 4 29 3 20 I 2 9 0 16 0 1 --
D V G C T 5 55 0 V G C T 5 55 D V G C T 5 55 --
I I I I I I I I I II I II I I I I I I I I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE SS -SUSITNA STATION
NOTES:
r.A.CRITERIA:NOT LESS THAN 6.5 OR GREATER THAN 9.0 pH UN ITS.SHALL
NOT VARY MORE THAN 0.5 pH UNITS FROM NATURAL CONDITION (ADEC 1979).
I.B.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
DATA SUMMARY-pH
SOURCE:USGS AND RaM FIGURE E.2.98
175
...:
........
o 125E
JOou
~
en«
~75
z
:J«
:lil::
...J
c(
25
1.A;-----"20
a
,
.n
••
-""..
I-~•
•n ~
•-u a n•0 ..
I ••
......c-
II 16 67 6 60 6 21 3 3 33 4 29 2 19 I I 7 0 14 0 6 1-1-
D V G C T S SS 0 V G C T S SS 0 V G C T S SS 1-1-
I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER t3REAKUP
D-DENALI V-VEE CANYON G-GOLO CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.A.CRITERION:20 mg./1.OR MORE EXCEPT WHERE NATURAL CONDITIONS
ARE LESS (EPA 1976).
I.B.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
DATA SUMMARY -ALKALINITY
SOURCE:USGS AND RaM FIGURE E.2.99
-"-1
30
~
........20
Cl
E
LaJ
CI
X
0
£5
z
0 10m
0:::<t
(.)
LaJ
LaJ
0:::
l.L.
0
•
.~
.~...•,....U ...•It U
...
-l-·10 •,
4 II •••~
It
.-..
II 16 62 6 55 3 15 ·3 3 29 4 24 0 15 I I 6 0 14 0 5
1-......
D V G C T 5 Sti -0 V G C T 5 55 0 V G C T 8 88 I-f-
I I I I I I I I I I I I II I-I I I I
I I I I I I I I I I I I I I I I I I I I I I I III I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER ~REAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTE:
I.NO CRITERION ESTABLISHED.
DATA SUMMARY -FREE CARBON DIOXIDE
SOURCE:USGS AND Ra M FIGURE E.2.100
"-a.
E
zom
It:ct
U
(.)
Z
ct
C)
It:o
-I
ct
b2...
30
20
10 •
••.~
u ..--I...U I ..io.
~...1-4~..•.,
0 .~:..41·a
0 0 10 0 3 2 7 0 I 4 0 2 2 9 0 0 2 0 I 0 4 1-1-
D V G C T 5 S~D V G C T 5 55 D V G C T S 58 1-1-
I I I I I I I I I IIIII III I I I I I 1 1 •••••1 I I I II I I I I I I I I I 1 I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 5-SUNSHINE 58 -SU8ITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
2.WATERS CONTAI NI NG LESS THAN 3.0 mgJI.HAVE BEEN
OBSERVED TO BE RELATIVELY CLEAN (McNEELY ,t 01.1979).
DATA SUMMARY-TOTAL ORGANIC CARBON
SOURCE:USGS AND RaM FIGURE E.2.101
60
~
Cl
.§.40
0z«
~
IJ.J
0
Z
IJ.J
(,!)>-x 200
....J«
~
~
IJ.J
:I:
U
0
•
,
~,
.~
0 8 16 0 0 0 0 0 4 5 0 0 0 0 0 I 2 0 0 0 0 --
D V G C T S S~D V G C T S SS D V G C T S SS --
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
SOURCE:RaM
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.NO CRITERION ESTABLISHED.
2.AT GOLD CREEK t 2 SUMMER OBSERVATIONS
WERE LESS THAN 1.0 mg./I.
DATA SUMMARY-CHEMICAL OXYGEN DEMAND
FIGURE E.2.102
150
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
~
I
.,
-to-,--~fo
~
....--
14 17 62 6 30 3 4 3 4 25 4 13 I 4 I 2 8 0 8 0 0 --
D V G C T S SS D V G C T 5 SS 0 V G C T 5 5S f--f---
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
o
100
a::
9o
(.)
w
::>a::
I-
-en
t:z
::>
~
C(
CDo
(.)
:E
::>z
i=~I.A~50-
SUMMER WINTER t3REAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 5-5UN5HINE SS-5USITNA STATION
NOTES:
I.A.CRITERION:SHALL NOT EXCEED 50 UNITS (ADEC 1979).
LB.ESTABLISHED TO PREVENT THE REDUCTION OF PHOTOSYNTHETIC
ACTIVITY WHICH MAY HAVE DELETERIOUS EFFECTS ON AQUATIC LIFE.
2.AT DENALI t I SUMMER OBSERVATION WAS LESS THAN 5 UNITS.ONE
SUMMER OBSERVATION WAS GREATER THAN 5 UN ITS.
3.ATSUSITNA STATION 12 SUMMER OBSERVATIONS AND 2 WINTER OBSERVATIONS
WERE LESS THAN 5 UNITS.
4.AT TALKEETNA 1 I W1NTER OBSERVATION WAS LESS THAN 5 UNITS.
SOURCE:USGS AND RaM
DATA SUMMARY-TRUE COLOR FIGURE E.2.103
2.A
3.0
-"':-\
C'
E 2.0
Clw
~
0
(/)
(/)
£5 I~
~
«1.0-
~
~z
~=>..J
<l t I...,.,~,
0.0
0 10 '6 0 0 0 0 0 3 3 0 0 0 0 0 I 2 0 0 0 0
I--f-
0 V G C T 5 55 0 V G C T 5 55 0 V G C T 5 55 1-1-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES;
I.NO CRITERION ESTABLISHED.4.
2.A.A LIMIT OF 0.073 mg./I.HAS BEEN SUGGESTED BY EPA (SITTIG 1981).
2.8.THIS SUGGESTED LIMIT IS BASED ON THE EFFECTS OF ALUMINUM ON
HUMAN HEALTH.5.
3.AT VEE CANYON,7 SUMMER OBSERVATIONS WERE LESS THAN 0.10 mg./I.
TWO WINTER OBSERVATIONS AND THE ONE SUMMER OBSERVATION WERE
LESS THAN THE DETECTION LIMIT OF 005 mg./I.
S-SUNSHINE 55 -SUSITNA STATION
AT GOLD CREEK,4 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS
AND THE 2 BREAKUP OBSERVATIONS WERE LESS THAN THE
DETECTION LIMIT OF 0.05 mg./I.
(d)=DISSOLVED.
SOURCE~R8 M
DATA SUMMARY-ALUMINUM (d)FIGURE E.2.104
30
.........
dl
E-UJ
...J
II)«ffi 20
>oo
UJ
0::
...J
~
12
~10
2:
::::>z
i
:3<t
2A..,0
..
t -
0 0 "3 0 I 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 --
D V G C T S S~D V G C T S SS D V G C T S SS --
I I I I I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.NO CRITERION ESTABLlSHED.
2.A.A LIMIT OF 0.073 mg./1.HAS BEEN SUGGESTED BY EPA (SITTIG 1981).
2.B.THIS SUGGESTED LIMIT IS BASED ON THE EFFECTS OF ALUMINUM ON HUMAN
HEALTH.
3.(t)=TOTAL RECOVERABLE.
DATA SUMMARY -ALUMINUM (t)
SOURCE:USGS FIGURE E.2.105
0.30
2.A·~0
...,;
"-
Cl
E
o
UJ
:ioeneno
m
::I:
l-=>
~en
m
0.20
0.10
.
0 10 7 0 0 0 0 0 3 3 0 0 0 0 0 I 2 0 0 0 0 .....-
0 V G C T 5 55 0 V G C T 5 55 0 V G C T 5 55 .....-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II I I I I I
•MAXIMUM
-MEAN
•MtNIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
4.AT GOLD CREEK,6 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS,
AND THE 2 BREAKUP OBSERVATIONS WERE LESS THAN 0.05 mg./I.
5.(d)=DISSOLVED.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES:
I.NO CRITERION ESTABLISHED.
2A.EPA HAS SUGGESTED AN AMBIENT LIMIT OF 0.0035 mg'/I.{SITTIG 1981).
2.B.THIS SUGGESTED LIMIT FOR BISMUTH IS BASED ON HUMAN HEALTH
EFFECTS.
3.AT VEE CANYON,9 SUMMER OBSERVATIONS,THE 3 WINTER OBSERVATIONS,
AND THE I BREAKUP OBSERVATION WERE LESS THAN 0.05 mg./I.
S-SUNSHINE SS -SUSITNA STATION
SOURCE:R 8 M
DATA SUMMARY-BISMUTH (d)FIGURE E.2.106
0.003
-"-~0.002
E
~
0w
~
0
(J)
(J)o I.~
-:c 0.001
2
~
::::>-~1.---....0
<t
u 2.--'"
0.000
0
::>~
0
::>~
-_.-
0 0 3 0 4 3 13 0 0 I 0 5 I 9 0 0 0 0 2 0 6 1-;-
D V G C T S SS D V G C T S SS D V G C T S SS r-r-
I I I I I I I I I I I I I I I I I I I
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER .WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION
NOTES:
I.CRITERIA:0.0012 mg./1.IN HAR D WATER AND 0.0004 SOFT WATER (EPA 1976).
2.CRITERION:LESS THAN 0.0002 rng./1.(McNEELY et 01.1979).
3.THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC
ORGANISMS.
4.AT GOLD CREEK,I SUMMER OBSERVATION WAS LESS THAN 0.001 mg./I.
THE I WINTER OBSERVATION WAS LESS THAN 0.003 mg./I.
5.AT TALKEETNA,2 SUMMER OBSERVATIONS AND 2 WINTER OBSERVATIONS
WERE LESS THAN 0.001 mg.fL
6.AT SUNSHINE,2 SUMMER OBSERVATIONS AND THE I WINTER OBSERVATION
WERE LESS THAN 0.001 mg./I.
7.AT SUSITNA STATION,12 SUMMER OBSERVATIONS WERE LESS THAN 0.002
mg.lJ.THE 9 WINTER OBSERVATIONS AND THE 6 BREAKUP OBSERVATIONS
WERE LESS THAN 0.003 mg./I.
8.(d):DISSOLVED
SOURCE:USGS
DATA SUMMARY-CADMIUM(d)FIGURE E.2.107
-~-,1
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
0.0100.005._---.--"-
,0030
.0020
,
:>.0010
----JII"
,0000
~~..
0 0 6 0 10 6 13 0 0
I 0 5 I 9 0 0 0 0
3 0 6 f-I-
0 V G C T 5 55 0 V G C T 5 55 0 V G C T 5 SS ,...1-
I I I I I I I I I I I I II I I I I I J I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I III I I I I I'
o
......
0-
S
~0
CD<ta:::w>ou
UJa:::
...J I.
j:!
~
'0
~
:E I.
~
:IE 2o
<J 0
SUMMER WINTER BREAKUP
D-DENALI V-VEE OANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES
I.CRITERIA:0.0012 IN HARD WATER AND 0.0004 mg / I IN SOFT WATER (EPA 1976).
2.CRITERION:LESS THAN 0.0002 mg./1.(McNEELY et 01.1979).
3~ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
4.AT GOLD CREEK,3 SUMMER OBSERVATIONS WERE LESS THAN O.OIOmg/1.THE I
WINTER OBSERVATION WAS LESS THAN 0.001 mg./I.
5.AT TALKEETNA,5 SUMMER OBSERVATIONS,I WINTER OBSERVATION AND
2 BREAKUP OBSERVATIONS WERE LESS THAN 0.010 mg./!.
6.AT SUNSHINE,4 SUMMER OBSERVATIONS WERE LESS THAN 0.010 mg./1.
7.AT SUSITNA STATION,7 SUMMER OBSERVATIONS,7 WINTER OBSERVATIONS
AND 5 BREAK UP OBSERVATIONS WERE LESS THAN 0.020 mg./I.
8.(t)=TOTAL RECOVERABLE.
DATA SUMMARY -CADMIUM (t)
SOURCE:USGS FIGURE E.2.1 08
~2.a.a.ou
£:)
UJ
~
~~
~0
'--j
o
~
..........
~O.
:J
U
O.
030
020
.010
~
000 .
~
--
0 0 '3 0 3 3 13 0 0 I 0 5 I 9 0 0 0 0 2 0 6 ......1-
D V G C T S SS D V G C T S SS D V G C T S SS r-r-
I I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
i
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 5S -SUSITNA STATION
NOTES:
I.CRITERiON:0.01 OF THE 96-HOUR LC50 DETERMINED THROUGH BIOASSAY (EPA 1976).
2.CRITERION:0.005 mg/I (McNEELYet 01.1979 L
3.THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
4.AT TALKEETNA.THE 3 SUMMER OBSERVATIONS WERE LESS THAN 0.010 mg/1.
5.AT SUSITNA STATION,6 SUMMER OBSERVATIONS.2 WINTER
OBSERVATIONS AND 2 BREAKUP OBSERVATIONS WERE LESS
THAN 0.002 mg /1.
6.(d)=DISSOLVED.
SOURCE:USGS
DATA SUMMARY COPPER (d)
FIGURE E.2.109
-
':
Cl
E-W
-Jm«
0:::w>0
(.)
W
0:::
-J
~
0
1---='(.)
0:::
Wa..a..
0
(.)2
0
0
!.
D
-.
...
U -'"n
0
~.
-
-'---'--~
0 0 6 0 IL 6 13 0 0
I 0 5 I 9 0 0 0 0 :3 0 6 --
D V G C T 5 55 0 V G C T 5 55 0 V G C T 5 SS -""""
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I J I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER 8REAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-5UN5HINE SS-5U5ITNA STATION
NOTES:
I.CRITERION:0.01 OF THE 96 -HOUR LCSO DETERMINED THROUGH BIOASSAY
(EPA 1976).
2.CRITERION:0.005 mg./!.(McNEELY et 01.1979).
3.THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC
ORGANISMS.
4.AT GOLD CREEK 1 I SUMMER OBSERVATION WAS LESS THAN 0.010 mg./1.
5.AT SUSITNA STATION,I SUMMER OBSERVATION AND 2 WINTER OBSERVATIONS
WERE LESS THAN 0.020 mg./I.
6.AT TALKEETNA,I BREAKUP OBSERVATION WAS LESS THAN 0.020 mQ./I.
7.(t)=TOTAL RECOVERABLE.
SOURCE:USGS
DATA SUMMARY-COPPER (t)FIGURE E.2.1I0
60
zo
~I.A·-'O
-j
.........
Cl
E
l.IJ
...Jm«
D:
W
~
(.)
W
D:
...J
~o.....
-lU
lL.
40
20
~-~-1
~
.
•.I IJ~..._.
.J.~
0 0 6 0 13 6 13 0 0 I 0 5 I 10 0 0 0 0
4 0 6 '--r-
D V G C T 5 5S D V G C T 5 55 D V G C T S 5S f--f--
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION
NOTES:
I.A.CRITERION:LESS THAN 1.0mg./1.(EPA 1976;SITTIG 1981).
LB.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
2.(t)=TOTAL RECOVERABLE.
DATA SUMMARY -IRON (t)
SOURCE:USGS FIGURE E.2.III
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
•MAXIMUM
\
I
I
..",
0
.~
.~
.....~
4
0 •I....."'.i~
~
L.~.~-_.
0 0 6 0 10 6 13 0 0
I 0 5 I 9 0 0 0 0 2 0 6 f-r-
0 V G C T S SS 0 V G C T S SS 0 V G C T S SS f-r-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
0.1
0.20
0.30
til
E
I.LJ
...Jm«a:
I.LJ>o
(,)
I.LJa::
...J
~o
~
:g
0..
-1.---'o«
I.LJ 0.0...J
"
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 5S -SUSITNA STATION
NOTES:
I.CRITERION:LESS THAN 0.03 mg./I.(McNEELY et 01.1979).
2.CRITERION:0.01 OF THE 96-HOUR LC50 DETERMINED BY BIOASSAY
(EPA 1976).
3.ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
4.AT GOLD CREEK,3 SUMMER OBSERVATIONS WERE LESS THAN 0.100 mg./I.
5.AT TALKEETNA,6 SUMMER OBSERVATIONS AND I WINTER OBSERVATION
WERE LESS THAN 0.100 mg./I.
6.AT SUNSHINE,2 SUMMER OBSERVATIONS WERE LESS THAN 0.100 mg./I.
7.~SUSITNA STATION r 5 SUMMER OBSERVATIONS,3 WINTER OBSERVATIONS,
AND 2 BREAKUP OBSERVATIONS WERE LESS THAN 0.200mg./I.
8.(0 =TOTAL RECOVERABLE.
SOURCE:USGS DATA SUMMARY-LEAD (t)FIGURE E.2.112
-.
.........c;.
E
c
lIJ
~eneno
E:
2
lIJen
lIJz I.A
4:(
C)z
4:(
2
0.30
0.20
0.10
~..-•
0.00
.,~"",..IL "1
0 0 '7 0 13 5 13 0 0 I 0 7 2 9 0 0 0 0 I 0 6 --
0 V G C T 5 5~0 V G C T
5 55 0 V G C T S 55 --
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I tl I II II I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER aREAKUP
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 5-SUNSHINE S5-SUSITNA STATION
NOTES:
I.A.CRITERION:LESS THAN 0.05 mg./I.(EPA 1976)
I.B.ESTABLISHED TO PROTECT WATER SUPPLIES.
2.AT SUSITNA STATION.6 SUMMER OBSERVATIONS,I WINTER OBSERVATION
AND 6 BR EAKUP OBSERVATIONS WERE LESS THAN 0.010 me;,./I.
3.(d)=DISSOLVED
DATA SUMMARY-MANGANESE
SOURCE:USGS
(d)
FIGURE E.2.113
W-lm
ct
0:::
W
~
frl
0:::
-l
~0......
c
~-wenwz
ct
(!)I.Azct
~
1.50
l.00
•
0.50 •I-iii
•
•••lit
H
0.00 II 1.1 -l-
0 0 6 0 "12··6--13 0 0
I 0 5 I 9 0 0 0 0 4 0 6 I--f-
0 V G C T 5 5::t 0 V G C T S 55 0 V G C T S S5 f-f--
I I I I I I I I I I I I II I I I I I I I I I I II I I I I I I I I I I I I
I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S -SUNSHINE 55 -SUSITNA STATION
NOTES:
I.A.CRITERION:LESS THAN 0.05 rng./I,(EPA 1976).
LB.ESTABLISHED TO PROTECT WATER SUPPLIES.
2.AT SUSITNA STATION.I BREAKUP OBSERVATION WAS LESS THAN 0.01 rng./1.
3.(t)=TOTAL RECOVERABLE.
DATA SUMMARY-MANGANESE (t)
SOURCE:USGS FIGURE E.2.114
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
003
1002
001
.-
JOOO ~
°0 "3 °3 3 13 0 °I 0 2 2 9 0 0 0 0 0 0 6 f--r-.
D V G C T S SS D V G C T S SS 0 V G C T S SS r-r-;
I I I I I I I I I I I I I I I I I J I I I I I I I I I I I I I I I I I I I I 111 I I I I I I I I I I I I I I I I
O.
0.
';-O.
Cl
.E-
ow
~o
(I)
(I)o
-;;0.0
:z:->-a::
~I.A
a::w
2:
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA
NOTES:
I.A.CRITERION:LESS THAN 0.00005 mg./1.(EPA 1976).
LB.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
2.AT GOLD CREEK,I SUMMER OBSERVATION AND THE I WINTER
OBSERVATION WERE LESS THAN 0.001 mg./I.
T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
3.AT SUSITNA STATION,8 SUMMER OBSERVATtONS,7 WINTER OBSERVATIONS,
AND THE 6 BREAKUP OBSERVATIONS WERE LESS THAN 0.0005 mg./I.
4.(d):DISSOLVED
DATA SUMMARY -MERCURY (d)
SOURCE'USGS FIGURE E.2.115
"'-CC---C-'-'l
0.0
"o
E.
wffi 0.00
«a::::w
~uwa::::
....J«b 0.0
I-
CI
:I:
>-a::::
~u
0:::
W
:Ii
I.A
0.0
-b.106b8 I
I
.
-
----_~-
0 0 6 0 9 6 13 0 0 I 0 5 I 9 0 0 0 0 3 0 6 I-f-
D V G'C T 5 55 D V G C T 5 S5 D V G C T S 55 I-f-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER I3REAKUP
4.AT GOLD CREEK I THE I WINTER OBSERVATION WAS LESS THAN
0.0005 mg./!.
5.(t)=TOTAL RECOVERABLE.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES:
I.A.CRITERION:LESS THAN 0.00005mQ./1.(EPA 1976).
LB.ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS.
2.AT TALKEETNA,I SUMMER OBSERVATION WAS LESS THAN 0.0005 mQ./1.
3.AT SUSITNA STATION,7 SUMMER OBSERVATIONS,7 WINTER OBSERVATIONS
AND 4 BREAKUP OBSERVATIONS WERE LESS THAN 0.0005 mg./I.
S-SUNSHINE 55 -SUSITNA STATION
SOURCE:USGS
DATA SUMMARY -MERCURY (t)
FIGURE E.2.116
1 l
z:1.
w
:lI:::
U
Z o.
MEAN
•MINIMUM
•MAXIMUM
NO.OF OBSERVATIONS
LOCATION
USO
.100
050
--•n n
.~
000 ••('-
0 0 6 0 I 6 5 0 0 I 0 0 I 3 0 0 0 0 0 0
I I-~
D V G C T S SS D V G C T S SS 0 V G C T S SS r-r-
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
o
.........
t-wcfi 0
eXa:::
W
~
Uwa:::
..J
!et50
~
SUMMER WINTER BREAKUP
D-DENALI V-VEE CANYON 'G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION
NOTES:
I.CRITERION:LESS THAN 0.025 mg./1.(McNEELY It 01.1979).
2.CRITERION:0.01 OF THE 96-HOUR LC50 DETERMINED THROUGH
BIOASSAY (EPA 1976).
3.THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC
ORGANISMS.
4.AT GOLD CREEK,2 SUMMER OBSERVATIONS WERE LESS THAN 0.05 mg./I.
5.AT TALKEETNA,THE I SUMMER OBSERVATION WAS LESS THAN 0.05 mg./I.
6.AT SUNSHINE,2 SUMMER OBSERVATIONS WERE LESS THAN 0.05 mg./I.
7.(t)=TOTAL RECOVERABLE.
SOURCE:USGS
DATA SUMMARY-NICKEL (t)FIGURE E.2.117
-"-cit
.E-
o
UJ>..J
0
CJ)
~
0
c
N-
(.)
z
N
I.
0.30
0.20
0.10
..
.
..n ...
0.00 ..u t .~j loIII~•~
-..
0 0 ;,0 3 3 13 0 0 I 0 5 I 9 0 0 0 0 2 0 6 -"'-
D V G C T 5 55 D V G C T 5 55 0 V G C T 5 SS 1--1--
I I I I I I I I I I I I I I I I I I ,I I I I I I I I I I I I I I I I I I I I I I I I I I I II I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
O-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA S-SUNSHINE 55 -SU5ITNA STATION
NOTES:
I.CRITERION:LESS THAN 0.03 mg./I.(McNEELY et 01.1979).
2.CRITERION:0.01 OF THE 96 -HOUR LC 50 DETERMINED THROUGH
BIOASSY (EPA 1976).
3.THE ABOVE CRITERIA BASED ON HUMAN HEALTH EFFECTS.
4.AT SUSITNA STATION,8 SUMMER OBSERVATIONS,8 WINTER
OBSERVATIONS AND 4 BREAKUP OBSERVATIONS WERE LESS THAN
0.020 mg./I.
5.AT GOLD CREEK THE I WINTER OBSERVATION WAS LESS THAN 0.012 mg./1.
6.(d)=DISSOLVED
SOURCE:USGS DATA SUMMARY -ZINC (d)FIGURE E.2.118
0.00
0.30
"Cl
E
-0.201.IJ
...Jm«a::
1.IJ>o
(.)
1.IJa::
...J 010« .
5
I--c:
N-(.)1.----"
z
N
..
-II>
.~-..
~
0 0 6 0 II 6 13 0 0 I 0 5 I 9 0 0 0 0 3 0 6 --
D V G C T S SS D V G C T 5 55 0 V G C T 5 55 --
I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
•MAXIMUM
MEAN
•MINIMUM
NO.OF OBSERVATIONS
LOCATION
SUMMER WINTER BREAKUP
4.AT SUSITNA STATION,I SUMMER OBSERVATION AND 2 WINTER
OBSERVATIONS WERE LESS THAN 0.020 mg./1.
5.(t)=TOTAL RECOVERABLE.
D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T -TALKEETNA
NOTES:
I.CRITERION:LESS THAN 0.03 mg./I.(McNEELY et 01.1979).
2.CRITERION:0.01 OF THE 96-HOUR LC50 DETERMINED THROUGH
BIOASSAY (EPA 1976).
3.THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC
ORGANISMS.
S-SUNSHINE SS -SUSITNA STATION
SOURCE:USGS
DATA SUMMARY-ZINC (t)
FIGURE E.2.119
SLOUGH SA GRO
8-3Ae
a-4A e
\
~
~
)UND WATER CONTOURS
LEGEND:
•GROUND WATER OBSERVATION WELL(ego 8-10.)
NOTES:
I)ELEVATIONS ON SEPTEMBER 3,1982 WITH
DISCHARGE AT GOLD CREEK =14,600 CFS.
2)CONTOURS IN FEET ABOVE MEAN SEA LEVEL.
FIGURE E.2.120
---"---
9-12~
SLOUGH 9 GROU
9-10.
I"
roO\
/&01-
/
9-3.
9-2.
FLOW
Q
9-IA.
ALASKA RAILROAD
LEGEND:
•GROUND WATER OBSERVATION WELL (eg.9-15.)
NOTES:
I.ELEVATIONS ON SEPTEMBER 6,1982 WITH
DISCHARGE AT GOLD CREEK:12,200 CFS.
2.CONTOURS IN FEET ABOVE MEAN SEA LEVEL.
~D WATER CONTOURS
FIGURE E.2.121
"-./V
'"/'
'/
~
'"/
"'-/VOLUME
I
"/')
/\
/\
\
/\
/\
/SURFAT AREA-.\
\
/I
\
\J
/"-
"\
/'\
\
/\
I \
\
\
\
-
-
,.,..
"""'
-
-I
26
24
22
20
I-
IJJ
~18
::Eo
I-16....o
CD
::IEo 14a::
IL
z
~12....-
~w
~10
8
6
4
2
70 60
2
AREA (ACRES)
50 40 30
3 4 5
VOLUME (ACRE-FEET x 100)
20
6
10
7
o
8
-SALLY LAKE
AREA-CAPACITY CURVES
FIGURE E.2.122
LJ )
~'",',~IA":~
.DELUSION'...••.6\d ".~~~,j~.-aoo~~jj;rk.-----+/1:.~AS X ';:F!?IDeadmanCree~,"i;..'.'.<:...10 ..:
LEGEND:
NORMAL MAXIMUM
--....--~~-OPERATI'lIG LEVEL
EL.218S
CONTOURS ARE IN-----2300-----FEET ABOVE MSL
----SLOUGH
--'.-TRI BUTARY
WATER BODIES TO BE INU
2 MILES
!
(
!
.../21
~./-
i 3
V kKosinaCree
WATANA RESERVOIR
Portage Creek .J7 0\v=
LEGEND:
,-------NORMAL MAXIMUM
OPERATING LEVEL
El.1455
--2000 CONTOlJRSIN FEET
ABOVE MSL
-'-- - - -SLOUGH
•.-..-TRIBUTARY
WATER BODIES TO BE INUNDATE
o
I
rDBY DEVIL CANYON RESERVOIR
I
I
t
SUSITNA RIVER
WalanaDam
o
SCALE ~..~~~2_MILES
/-.............
/
I
/
/
/
I
/
SUSITNA RIVER //
DRAINAGE BASIN 'v
/
/"
/"
,,/
./®..-..-"-//'
.,.----.,.-
,//
,,/
/'
/"
/'
/
/
I
/
I
/
/
/
I
/
/
/
I
/
/
I
I
I
\
\
\--\/,
/""-"/""/"-,/'""---_/"'-
"-
"
TOWNSH IP GRIDS I
RIGHTS IN THE
SOURCE:DWIGHT 1981
--
LEGEND:
TOWNSHIPS
I.SUSITNA
2.FISH CREEK
3.WILLOW CREEK
4.LITTLE WILLOW CREEK
5.KASHWITNA
6.SHEEP CREEK
7.MONTANA CREE K
8.TALKEETNA
9.CHULINA (CHUNILNA)
10.SUSITNA RESERVOIR
II.CHULITNA
12.TOKOSITNA
13.KROTO -TRAPPER CREEK
14.KAHILTNA
15.YENTNA
16.SKWE NTNA
17.HAPPY
18.ALEXANDER CREEK
t?
o 10 20 MILES
SCALE ~~~~iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiil
o
I
'-•CANTWELL _,/~~,/----,/--~",/,
,./",/\,~/,---
I
J
I
/0>
/
/
/
(
\
\
\
6&V \
\
\
~\
Q \
\
I
I
./.....-------
/'
/'
/'
//'/'
......,//
""",--..,..."
INVESTIGATED FOR WATER
!SUSITNA RIVER BASIN
FIGURE E.2.125
1 )]')))l
SELECT LOCATIONS OF COOK INLET
SALINITY ESTIMATES
~
LEGEND:
~SALINITY ESTIMATE
LOCATIONS
~
.~...
~
~
ANCHORAGE
KENAI
PENINSULA
BLrlNG
SOUND
o 20 40
FIGURE E.2.126
30,000
25,000
20,000
~15,000
z
::::i
<l:en
10,000
5,000
o
~
~.
~~~~~~.......-........
,.....~.......,........
""~.........
~10--""-/./'/..
1-0-•.......:./
/~./.'
/..~
?,,/
.'
:?~,t'.~~
OCT NOV DEC JAN FEB
SOURCE;RMA 1983
NOTES:
I.CURVES PLOTTED USING END OF THE
MONTH SALINITIES FOR NODE 27.
2.I PPT=1000 mg/I.
TEMPORAL 51
COOK INLET NEAR
~~.----~..
~_....~.~-'".1.-.-',,
.""..,'.,","~~,
\',~.~.,\,,~
~'...,~".,'".:\."':-~:-
_.....
'"".....................~~"":".:::--'~-......'
-
;,...-"'"
MONTHS
APR MAY JUN JUL AUG SEP
ALINITY ESTIMATES FOR
:THE SUSITNA RIVER MOUTH
LEGEND:
PRE -PROJECT
---WATANA FILLING (WY 1992)
_.-.WATANA OPERATION (WY 1995)
FIGURE E.2.127
~~i--'"
">/
/'
VOLUME 1/'\SURFACE AREA
/1\
V \/\
/\
I \
\
.....
-
-
r'"
I
-
2600
2500
2400
2300
2200
2100
l-
I.LJ
I.LJ
IL.
Z eooo0
~>I.LJ
~
I.LJ
1900
1800
1700
1600
1500
1400a
6
2
SURFACE AREA (ACRES x 10 4 )
5 4 :5 2
4 6 8 ~
VOLUME (ACRE-FEET x 10 6 )
12
o
14
.....
WATANA RESERVOIR VOLUME
AND SURFACE AREA
FIGURE E.2.I 28
I
I~1 /
/
l ~/
V
!VOLUME /
/~/f-SURFACE AREA
V 1\/
V \
1\
/1
1\
/I \
I \
I
1 I
-
.....
1500
1400
1300
r --.....ww,....l4.
Z
Q
!c(
l~:>1200w
!-J
ILl
.~
1100
1000
900 o
12
2
SURFACE AREA (ACRES x 103 )
10 8 6 4
4 6 8 10
VOLUME (ACRE-FEET x 10 5 )
2
12
o
14
DEVIL CANYON RESERVOIR VOLUME
AND SURFACE AREA
FIGURE E.2.129
20
18
16
14
-;;;12
LLo
ooo
~10
uJ
C)
a::«
:I:rn
o 8
~------+----_----.Jf----------j----------jl---~-----f-----
6
ALL CASES
4
2
o I
OCT NOV DEC JAN FEB MAl
OPERATIC
ALTERNATIV
NOTES:
I)LETTERS DESIGNATE THE VARIOUS
SCENARIOS CONSIDERED (ie.A=CASEA).
2)FLOW REPRESENTS GOLD CREEK FLOWS.
3)Three additional flow regimes were
investigated with respect to project
economics.These regimes are discussed
in Exhibit B,pages B-2-l23 thru B-2-128 .
&are identified as cases E,F,&G.MINI MUM
FOR
D
-
C2--~-
CI
-
C
A2
\
AI
C,e,e,D A
AI A2 I I \
A
,-
i
-
,
APR MAY JUN JUL AUG SEP
~L TARGET FLOW
iFLOW SC ENARIOS
FIGURE E.2.130 :
POTENTIAL Wj
,
".LOCATION MAP
o 4 8 MILES
SCALE ~i~~5iiiiiiiiiiiiiiiiiiiii!
TANA BORROW SITES
LEGEND
E~~:=J BORROW I QUARRY SITE LIMITS
o 2 MILES
SCALE ;!
FIGURE E.2.131
I
-
-
-
1700
1600
SUSITNA RIVER FLOW -
(
N 3 228 000
"'-1
/
N 3 228 500
REFERENCE:BASE MAP FROM COE,1978 "'~200'WATANA TOPOGRAPHY
SHEETS 8 B 9 OF 26,COORDINATES IN FEET,ALASKA STATE PLANE (ZONE 4)
WATANIJ
QUARRY 51
APPROXIMATE QUARRY SITE LIMIT
QUARRY SITE L
~
TE L
LEGEND
___BORROW SITE LIMIT
l.ENTIRE QUARRY SITE LIES WITHIN PROPOSED WATANA RESERVOIR
LIMITS
2.MATERIAL LIMITS INFERRED FROM PRELIMINARY MAPPING
AND ARE SUBJECT TO REFINEMENT AND VERIFICATION IN OESIGN
LEVEL INVESTIGATION.
3.SURFACE ELEVATIONS FROM I"~200'TOPOGRAPHY -COE,1978,
TRACED AT 25'CONTOUR INTERVAL.
4.PHOTO TAKEN AUGUST,1981.
0~~~~~2~0;ii0iiiiiiiiiiiiiiiiiiii400iiil FEETSCALE~,
FIGURE E.2.132
N ~O 000
-
BORROW SITE 0
(
. I
-I
.-4 ,
L t -,
-----~~._-----------_.-------,---'---..;--------'---------
REFERENCE:BASE MAP FROM 1978,COE -I".200'OAMSITE TOPOGRAPHY,
SHEETS 13-15,18-20 OF 26
r L r i------
l'i
I I
//
/
/
"
"/
"
,
/
"/
)
/
"/
/
/
LEGEND
---BORROW SITE LIMIT
NOTES
MOST OF BORROW SITE LIES OUTSIDE OF PROPOSED
WATANA RESERVOIR LIMITS.
2.BORROW MATERIAL IS COMPRISED OF UP TO 600 FEET OF
GLACIAL TILL,OUTWASH,AND ALLUVIUM.
3.CONTOUR INTERVAL 25 FEET,REDUCED AND TRACED FROM
REFERENCED BASE MAPS.
4.PHOTO TAKEN AUGUST,1981.
~0~~~4~00iiiiiiiiiiiiiiii8iiil?0 FEETSCALEi:,
WATANAIBORROWSITE D
FIGURE E.2.133
·~
-...--
••
o
ClO
--_/
1&.
REFERENCES:BASE MAP FROM COE ,1978 -I"•200'WATANA TOPOGRAPHY,SHEET 6 a II OF 26
R aM,1981-1".400'DEVIL CANYON RESERVOIR MAPPING,FLIGHT
5 (6-8),MANUSCRIPT 2
COORDINATES IN FEET,ALASKA STATE PLANE (ZONE 4)
/'
LEGEND
-----BORROW SITE LIMIT
NOTES
PORTIONS OF BORROW SITE LIE WITHIN THE PROPOSED
DEVIL CANYON RESERVOIR LIMITS.
WATANA
BORROW SITE E
2.MATERIAL LIMITS BASED ON FIELD EXPLORATION,MAPPING
AND AIR PHOTO INTERPRETATION.FINAL LIMITS OF
BORROW MATERIALS SUBJECT TO RESULTS OF DESIGN
INVESTIGATIONS.
3.CONTOUR INTERVAL 25',TRACED AND/OR REDUCED FROM
REFERENCED BASE MAPS.
4.PHOTO TAKEN AUG UST,1981.
o 400 800 FEET
SCALE ~i~~~iiiiiiiiiiii~!
FIGURE E.2.134
-i
REFERENCE:BASE MAP FROM R8M,1981-1"'2000'RESERVOIR MAPPING,
COORDINATES IN FEET,ALASKA STATE PLANE (ZONE 4 l.
/----.~---.
/~.
/'
/'/----"j'!..-----
//
I I (
I')
,I ,.'/
J
I ,('
//
/'f'I~
1/i
I ,I ,J
,.'I J~j r!",I)
,//1,'1
(~)
I ,
I.I./,/.~NATURAL FLOW RESTRICTION
),~WEIR
/11 1./
!'(~-)r:')
,-_~Ii /
I r~
L~~'
..l.,.,000
LEGEND
---BORROW SITE LIMIT
NOTES
ENTIRE BORROW SITE AS ORAWN LIES WITHIN PROPOSEO
OEVIL CANYON RESERVOIR LIMITS.LOCAL DEPOSITS ARE
INFERRED TO CONTINUE UP SLOPE BEYOND LIMITS SHOWN.
BORROW SITE I
WATANA
BORROW SITE I
2.MATERIAL LIMITS BASED ON FIELO MAPPING AND AIR PHOTO
INTERPRETATION.FINAL MAPPEO LIMITS OF BORROW SITE
SUBJECT TO RESULTS OF DESIGN INVESTIGATIONS.
3.CONTOUR INTERVAL 100',TRACED FROM 1"'1000'ENLARGEMENT
OF REFERENCED BASE MAP
4.PHOTO TAKEN AUGUST,I9B1.
0~~~'~OOO~iiiiiiiiiii20~PO FEETSCALEl:,
FIGURE E.2.135
13
12
"
10
9
CJ)u...8(.)
8
Q
~
w 7
<.!)
a::
<l:
:I:
(.)
CJ)6
15
5
4
3
2
I I I I I I I I I I I I I
f--
f--
f--
f--
f--
r--
f-....,-r,I
_____________-.J L ___....
--
--
..NATURAL.:•
I I I I I I I I I I I I I
LEGEND:
MINIMUM FLOW
REQUIREMENT DURING
FILLING OF WATANA
---MINIMUM FLOW
REQUIREMENTS DURING
OPERATION OF WATANA
AND WATANA/DEVIL
CANYON.
OCT NOV DEC JAN FEB MAR APR MAY JUN
TIME OF YEAR
JUL AUG SEP OCT NOV
MINIMUM FLOW REQUIREMENTS AT GOLD CREEK
FIGURE E.2.136
100
9
8
7
6
5
4
3
en
I!..
U
o 2oo
UJ
(!)
a:«:x:uen
o 10
~9
~8
a:7«
~6
UJ
~5
:x:.....
4
-----ii'""--P--......
~~..-.-.-•----•
2
I
I 2 5 10 20 50 80 90 95 98 99
PROBABILITY OF EXCEEDANCE
NOTE:PERIOD OF RECORD IS WY 1950 -WY 1981.
THREE -YEAR MEAN DISCHARGE
AT GOLD CREEK
FIGURE E.2.137
2200
WATANA DAM CREST ELEVATION
2000
I-w
W
I.L
zo
~>
lLJ
-I
lLJ
1800
1600
1400
40
J
~------
/~
.,-
---_/~-
30
CJ)
LL
()
0
0
0-
w 20·
C)
ll::c:r
:I:
()
~
I::)
10
a
LEGEND:
10 %EXCEEDENCE
50%EXCEEDENCE
90 %EXCEE DENCE
M J J
1990
PROBABIL ITY
PROBABILITY
PROBABILITY
WATANA WATER LE'
GOLD CREEK FLOWS DURING I
-
--tIO
%-...'----
-~/~..,./,,:::::--'------------~~.::--~-------\---50%
//
;','{/90%
~
'I
~
WATANA WATER LEVELS
M A D
~M
I
~ELS AND
~ESERVOIR FILLING
I
I
GOLD CREEK·
FLOWS
o
NOTES:
I.NATURAL STREAM FLOWS UNTIL
MAY 1991 WHEN FILLING BEGINS.
2.AVERAGE MONTHLY VALUES PLOTTED
IN MIDDLE OF MONTH.
FIGURE E.2.138
50
40
---CD
Cf)'\
LL \(,.)30
0
0 \0
LaJ
(,!)
D::
<t
::I:
(,)20Cf)c
®
10
o
5 10 15 20 25 30
LEGEND:
AUGUST
NOTES:
AUGUST 1958 FLOWS
FILLING SEQUENCE II AUGUST 1958
FLOWS -WATANA MINIMUM STORAGE
CRITERIA VIOLATED
FILLING SEQUENCE 2,AUGUST 1958
FLOWS -WATANA CAPABLE OF
ABSORBING HYDROGRAPH
I.WATANA FLOW ASSUMED TO BE 84 %OF
GOLD CREEK FLOW.
?RESERVOIR FILLING CRITERIA EXCEEDED
WITH SEQUENCEQ)
3.NEGLIGIBLE CHANGE .IN DAM HEIGHT
DURING FLOOD EVENT
4.MAXIMUM RELEASE AT WATANA 31,000 CFS
(COMBINED POWERHOUSE AND OUTLET
FACILITY DISCHARGE).
FLOW VARIABILITY AT GOLD CREEK
DURING WATANA FILLING
FIGURE E.2.139
1 1 1 1
NOTE:THE ELEVATIONS AND DISTANCES PRESENTED
IN THIS SCHEMATIC ARE NOT INTENDED TO
PROVIDE QUANTIFICATION OF PROJECT EFFECTS.
CD PERCHED TRIBUTARY BED
(UNAFFECTED BY LOWERED
LEVEL OF SUSITNA RIVER)
COBBLE ~
~.........
I
BACKWATER AREA
(PRE-PROJECT CONDITIONS
I--------J.~.~GRAVEL DEPOSITED BY TRIBUTARY
-~''W\fUi8iiiiilt ""-"""WATER LEVEL
........(POST-PROJECT CONDITIONS)
~~-------
..................7 <SUSITNA RIVER WATER LEVEL
(PRE-PROJECT CONDITIONS)
TRIBUTARY WATER LEVEL
TRIBUTARY
THALWEG
®DEGRADATION OF TRIBUTARY BED
(UPSTREAM PROGRESSION OVER TIME)
o
12
4
2
10
14
i=
w
~8-zo
i=
~~6
IJ..I
o 20 40 60 80 100
DISTANCE (FEET)
120 140 160 180
SCHEMATIC OF THE POTENTIAL EFFECTS OF THE SUSITNA RIVER
ON A TYPICAL TRIBUTARY MOUTH
FIGURE E.2.140
4.0
3.5
3.0
2.5
0
0
w r0::
::)
!:i:
0::2.0w
Q.
~
W
I-
1.5
1.0
0.5
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
I.MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY NATURAL FLOWS.
2.GOLD CREEK DISCHARGE (CFS):
OCT 4280
NOV 2560
DEC 1790
JAN 1460
WATANA FILLING:DOWNSTREt
49.00 155.00 161.00 167.00 173.00 179.00 185.00
~M TEMPERATURES -OCT TO JAN
FIGURE E.2.141
4.0
3.5
3.0
2.5
------------~
APR30 ~
(.)
o
wa::
::::>
!;:(
ffi 2.0
ll...
:::!:w
I--
1.5
1.0
0.5
APR 15
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
I.MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY NATURAL FLOWS.
2.GOLD CREEK DISCHARGE (CFS);
JAN 1460
FEB 1240
MARI120
APR 1240
WATANA FILLING:DOWNSTREA~
49.00 155.00 161.00 167.00 173.00 179.00 185.00
~TEMPERATURES -JAN TO APR
FIGURE E.2.142
4.0
3.S
3.0
2.S
u
0
wa::
:J
~2.0a::wa..
:::!:w
I-
I.S
1.0
os
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
I.MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
LOW FLOW DISCHARGE.
2.GOLD CREEK DISCHARGE (CFS):
OCT 2020
NOV 1460
DEC 1320
JAN 1260
WATANA FILLING:DOWNSTREA
LOW WIN
'9.00 155.00 161.00 167.00 173.00 179.00 185.00
~TEMPERATURES -OCT TO JAN
1rER FLOWS
FIGURE E.2.143
4.0
3.5
3.0 --~APR 30 _-----....~--------------
--
1.0
05
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
I MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA
AND LOW FLOW DISCHARGES.
2.GOLD CREEK DISCHARGE ( CF S);
JAN 1260
FEB 1220
MAR 1120
APR 1240
WATANA FILLING DOWNSTREA~
LOW WIN~
49,00 155.00 161.00 167.00 173.00 179.00 185.00
TEMPERATURES-JAN TO APR
"ER FLOWS
FIGURE E.2.144
9.0
8.5
8.0
7.5
7.0
u
0
w 6.50::
::::>
t:c
0::
Wa.
::!Ew
I-6.0
5.5
--..
______SEP 15
---.___AUG 15.-.-.........--.......-.-.-....-._.-.............-.--.""'-._._..--.......4.5
5.0
-------------
4.0
SEP 30
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143
NOTES:
I.MODEL ASSUMES 1981 METEOROLOGICAL
DATA RECORDED AT WATANA AND MEDIAN
FILLING FLOWS.
2.GOLD CREEK DISCHARGE (CFS):
JUN 6000 AUG 12000
JUL 6700 SEP 9000
RIVER MILES
WATANA:SECOND YEAR OF F
...---.:-.------..--.0-0-0-0-°-0_0-0-
.00 149.00 155.00 161.00 167.00 173.00 179.00 185.00
ILUNG DOWNSTREAM TEMPERATURES -SUMMER
FIGURE E.2.145
9.0
8.5
8.0
7.5
7.0
u
~
w 6.50::
::j
f--
<[
0::
Wa..
:::!:w
I-6.0
5.5
5.0
-.....AUG 15--.-'-.-.--.----."""'-.---._...........
.----."""'-.--'--._...........
.----.........-
-----...._-------..
_____
SEP 15----------------------
4.5
4.0
SEP 30
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143
NOTES:
I.MODEL ASSUMES 1981 METEOROLOGICAL
DATA RECORDED AT WATANA AND MEDIAN
FILLING FLOWS WITH AUGUST FLOW
REDUCED TO 6,000 CFS
2.GOLD CREEK DISCHARGE (CFS),
JUN 6000 AUG 6000
JUL 6700 SEP 9100
RIVER MILE
WATANA:SECOND YEAR OF FILL
6,000 C·
-0-0_.---..-...,.-.....'--.-...,
o~.-......-......----.---=:.:::4..........._._.
1.00 149.00 155.00 161.00 167.00 173.00 179.00 185.00
.ING DOWNSTREAM TEMPERATURES-SUMMER
FS IN AUGUST
FIGURE E.2.146
J 1 ]]]
a
2
CJ)
D::
W
~
~
~:3
0-
Wo
4
5
~..~/~~..~-'~/~.-,v'I/r
VP'''::r·d ..ff l/IT",..,..".."....,..,.V.~'"..~~-.,..................,
~/lJ'V,J V~~/~/~~v ./V~;:f /'
....I/""/./~
~',//'~:r</-/~',/
.,..~v~./I/V~,~V ~V
........~,~~'//~~~V~~'~V/-~~,../
,:/~/
,.I'///V/""/
~~~.~
/
~/
/
/'
/',,,'
\f'
.2 .3 .4 .5 .6 .7.8 .9 I 2 3 4 5 I 6 7 8 9 10 2 3 4 5 6 7 8 9 100
MICRO EINSTEINS PER SQUARE CENTIMETER PER SECOND
2 3 4 5 6 7 8 9 1000
LEGEND:
DATA
--a---
-0-
---0--------fr-a---
DATA SOURCE:RaM 1982
STATION
STA.II
STA.II
STA.II
STA.II
DATE
JULY 15,1982
JULY 28,1982
SEPT.la,1982
AUG.10,1982
EKLUTNA LAKE
LIGHT EXTINCTION
IN SITU MEASUREMENTS
FIGURE E.2.147
17,060
01 SCHARGE ( C FS)
9,500 13,3005100
86 t----fl----ff---_t_----+--------I-------+------+----II
74 t---t-----_+_------I------_+_-------I--------I---1
90 t------t-'--1f--+-~l---_t____\:li~--+--------I------_+_---....>r-_+____I1
78 t---+------+-------I-------+------+--------I---1
1,500 2,000
94 --+-r-----....,------...,....-----....,.-----------I~-
~o
>-u
~82 r-_t_-----+-----+-------+------+-------+------I
<3
~
lL.
W
70 L.....-.....L-.....I........l...-....L...-......L...""""'--....J
100 300 500 700
PLANT OUTPUT (MW)
900 1,100
WATANA-UNIT EFFICIENCY
AND DISCHARGE OPERATING RANGE
(AT RATED HEAD)
FI.GURE E.2.148
/
/
MAX.YEAR
(WY 1956)
""",/---
,I"/
\/
\I
\I,
\I,/"/,I
,I
,I"/
\f"4--MI N.YEAR
\/(WY 1970)
\/
\/,/,,//,/'.,/
2190
2180
2170
2160
i="w
W
LL 2150
-.Jw>W
-.J 2140a::
0>a::wen 2130wa::
e::{
z
e::{2120l-
e::{
~
2110
2100
2090
2080-
2070 --.........--L..-...-.........-_L..-..._.........._----ll....-_........._----ll....-_.........._----ll....-_.........._.....-I
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
WATANA RESERVOIR WATER LEVELS
(WATANA OPERATION)
FIGURE E .2.149
'"l0-
U
r---r---r---r---r---T----
140f-----'----f-----f-----f-----f-----f-----t----,---
I
I
30 f-------j----o-I--t-----j---j----+---+
I,
i
"
I~19!!1
LEGEND'
~=JINFLOW
OUTFLOoV
19!!Z 19!13 19!!4 19M 19!!6 19S7 19!!8 19!!9 1960 1961 196Z 1963
ZZOO ,-----.---.----,------.-----r---,---r-------r-----,------r-----r-----r-----r--
i
~2100
~
..J
III
2000 '-----1-~----l--1-9!!-1-1--1-9-52-'-----1-9-!!3-'------19!l4----'--1-9M----'--1-9!!-6-'-----~-7---19-!l8--'----19ll-9---'---196-0---'--19-6-1----'-19-6-Z----'--I96-3
!!O 1----1----+---I---+--+--+---t-
~
'I!I40f---t---t---t---t---t---t---t----t----t---+---+---+---+,7-
1
+--
"II
GOLD CR
196Z 19631961196019!!919!!719!16
'I
,
n ,
":':'1 ~
I,
"'I
.,II I
"'I 'I 'I 'I
"
I
'I II r.I--~I "
II,,I
"
-}-i,'--4-1--+-,
I I~
:I
I l II'"I'I lI, I
, I,,,I,, I ,!"I I I,,f--t-\--~"t -4 ~,I ,,1 ~l ' ' I
I',,,,,I I I,,),
I ,1 1 ,I rJ r I I I
JUL ,I : I ~,l
Jl,~~~/I rl :Br~r f!.n.:n~'in)\"\~U ~1\1i 1'+~V.·c '""'i'i •I
i ~l\J • !\j ~'".\J .~u '-'
19!!!!19!!419!1319!!2
G
30 I----+---+--¥II+--+--+--,.,I:-I---j-H---!"t"+--+---+i+---I----;:;-j-----t'-t-~
I''L
liT ~[1 :~
II ,I ,',I
n I I "1',1
,II':~:~:U:ZO f----;t',-I--t-it-I--:-i-I--i-"7I--j-=+I--f-'-I--t-tI--r-'t--+-It--t
r I ' : I ~:" :I I I I I:rJ I ,
I I : I I l':'
'"l0-
U
§
III..
II::..o
'"o
WATANA SIML
~
11 --,--_~~-+_--f___-_+--+
+
I
"~l _.0
II II I II 1 IIII)~II II lUI
~Lj
1 1 1
11:1 I I
IU I
1964 1965 1966
WATER YEAR
1961 1968 1969 1910 1911 191Z 1913 1914 1915 1916 1911 1978 1919 Ino 1981
WATANA INFLOW AND OUTFLOW
1964 1965 1966
WATER YEAR
1967 1968 1969 1971 197Z 1973 1914 1915 1916 1911 1918 1919 1911O 1981
WATANA RESERVOIR ELEVATION
n
!
L -r.---+---+---+----+--
I
.\J.U l)LJ U U tJ \J "J.U U LJ U \.J \..'lo \J 'l
1964 1965 1966 1961 1968 1969 1910 1911 197Z 1913 1914 1915 1916 1911 1918 1919 1980 1981
WATER YEAR
EEK PRE-AND POST-PROJECT FLOW
LATED RESERVOIR OPERATION FIGURE E.2.150
LEGEND:
-----PRE-PROJECT
- - -WATANA OPERATION
1=:;1 ELEVATION CHANGE
••••.•.EXTRAPOLATED
v
V
./···..
..
···
:
:
.
VCHANN'L BOTTOM
-
10,000 20,000 30,000
LRX 57 RATING CURVE(2)
GOLD CREEK DISCHARGE (CFS)
o
756
748
754
746
MAY JUN JUL AUG SEP
MINIMUM FLOWS
MAY JUN JUL AUG SEP
MEAN FLOWS
WATANA OPERATION:MONTHLY AVERAGE WATER
SURFACE ELEVATIONS AT RIVER M ILEI42.3
MAY JUN JUL AUG SEP
MAXIMUM FLOWS
756
754
746
748
752 752
~
f-f-
W
W
W W
lJ..lJ..
~
~
z z
~750
0
f-
i=750
««
>>
w W
...J ...J
W W
NOTES:
I.WATER SURFACE ELEVATION ABOVE
RATING CURVE.
2.RATING CURVE BASED ON GOLD
CREEK DISCHARGE AND OBSERVED
1982 WATER LEVELS (ADF6G 1982).
FIGURE E.2.151
LEGEND:
PRE -PROJECT
---WATANA OPERATION
(:::::::::1 ELEVATION CHANGE
•••••••EXTRAPOLATED
618 ......~:-~.....618
~
t-t-
W W
W Wu..u..
~~
z zo616o 6i6
i=t-;=;;=;w W--J --JWw
614 614
/
/
/
/
.I···:
:
···.
:CHANNFl BOTTOM AT
-:El.60P-5 I -..
o 10,000 20,000 30,000
lRX 35 RATING CURVE(2)
GOLD CREEK DISCHARGE (CFS)
612
620
622
MAY JUN JUL AUG SEP
MINIMUM FLOWS
MAY JUN ,IUl AUG SEP
MEAN FLOWS
WATANA OPERATION:MONTHLY AVERAGE WATER
SURFACE ELEVATIONS AT RIVER MILE 130.9
MAY JUN JUL AUG SEP
MAXIMUM FLOWS
612
620
622
NOTES:
I.WATER SURFACE ELEVATION ABOVE
RATING CURVE
2.RATING CURVE 8ASED ON GOLD
CREEK DiSCHARGE AND OBSERVED
1982 WATER LEVELS (ADF8 G 1982).
FIGURE E.2.152
LEGEND:
PRE-PROJECT
---WATANA OPERATION
Imtl ELEVATION CHANGE
•••••••EXTRAPOLATED
WATANA OPERATION:MONTHLY AVERAGE WATER
SURFACE ELEVATIONS AT RIVER MILE 124.4
10,000 20,000 30,000
LRX 28 RATING CURV~2)
GOLD CREEK DISCHARGE (C FS )
........
V
/
V
.I
~
:.
f
.'
VCHANNE BOTTOM
~548
o
550
554
556
5563
.....w
W
lJ...
zo
f=552
~w
...J
W
MAY JUN JUL AUG SEP
MINIMUM FLOWS
MAY JUN JUL AUG SEP
MEAN FLOWS
548
MAY JUN JUL AUG SEP
MAXIMUM FLOWS
550
554
55'8'_ .
556
zoi=552
~w
...J
W
.....w
W
lI..
NOTES:
I WATER SURFACE ELEVATION ABOVE
RATING CURVE.
2.RATING CURVE BASED ON GOLD
CREEK DISCHARGE AND OBSERVED
1982 WATER LEVELS (ADF 8G 1982).
FIGURE E.2.153
5oo
~J20 I---_+_-
U
ooo 100 I~-_+_-
160 I---_+_-
180--......--
w
~80 I----+--
«
:I:u
~601-------"!IIJlo
1401----+--
353010152025
TIME (DAYS)
1:50 YEAR FLOOD
(SUMMER)
5
1\
I \
~INFLOW
\
II .~l ____l~U!~LOW
~'N
~\ L OUTLET FACILITIES AT FULL CAPA-
CITY (ASSUMED POWERHOUSE FLOW
I 7000 CFS)
1--"\POWERHOUSE AND OUTLET
FACILITIES OPERATING
(MATCHING INFLOW)
20
10
70
90
00
80
w
~40«
I
U
~30
~60
u
o
8 50
\MAX WSEL =2193.0
\
I/"~
I \
\
OUTLET ~/\FACILITIES
~AT FULL
CAPACITY r/1 1
71...I
VPOWERHOUSE AND OUTLET FACILITIES
OPERATING (MATCHING,INFLOW)
2202
2200
-2198I-w
W
l.L
-2196z
0
~~2194
~ILl
..J
ILl
Q;;2192
0>0:::
ILl
~2190
0:::
2188
2186
2184 o 5 10 15 20 25 30
TIME (DAYS)
I:50 Y EAR FLOOD
(SUMMER)
35
2202--..,.--
22001---+--
~~198 1----4---w
W
I.L
i 2196 1----4---
o
~~2194 I---_+_-
..J
ILl
6 2192 1----+--
>0:::
ILlf3 2190 1---+--1-
0:::
2188 1---+-1--
2186 I------".~-
2184 ......._...r....._
o
FLOOD DISCHA
SURFAC
360 ,.....--~--r------;'--,..---.,.....-.....,--......,
35
--+---+----.-(\--..........pr--=OUTFLOW +---1
IJ
I /"-'OUTFLOW"...JII MATCH ING ~-
'i INFLOW
I .......MAIN SPILLWAY4"'"OPERATING -+----+--1•r-'POWERHOUSE AND OUTLET
!FACILITIES AT FULL CAPACITY
~RHOUSE AND OUTLET FACILITIES
ATING (MATCHiNG FLOW)
I I I I I
10 15 20 25 30 35
TIME (DAYS)
I:10,000 YEAR FLOOD
320 I---+---+---At--..---+----+--t----Ir-'j.~/OUTFLOW2801---+--~-f---t,...."------.______-_,_-__+_---1
INFLOW __~r~240 I-----,----~rl--t__\_\__\_--+_-__+_-__l~.:\'A-g 200 I----+-----"lf---*II--+--V~_+I-'t__+_-__+_-__lI'\,w ,.EMERGENCY ~\~160 1--+--/1---:'-/1---SPILLWAY --+-\"I<or-"--+----1
~"OPERATING "
~120 I----+--+-f!--I---+----+---+-~~--Ir___-.--.--
o i '
!80 1----+--Jr~-+-__=_=_=_::_::_:_.I.::-=-~-:-'-:-:-_:_:__-+-___1I--___II:MAIN SPILLWAY
II/OPERATING
40 !M"POWERHOUSE AND OUTLET -IJ--~,//FACILITIES AT FULL CAPACITY
WI6--0UTLET FACILITIES OPERATINGo
o 5 10 15 20 25 30
TIME (DAYS)
PROBABLE MAXIMUM FLOOD
2202 r----r---"""T""-~--~-....,....-~--_,
353025
2200 I-------I__+l-If'-/_--+-~___=""..,.........,.-__+---+-_____t~'EMERGENCY~~
~2198 I---+---ft--SPILLWAY _-+1-+-'_+--_---1~I OPERATING \
5 2196 1---+----If-+----I---f---+-\--\-+-----1
6 ,
->'lJ.J 2194 1---+---+-+----+---t---+---------+-----1
....J I \w ,
0::2192 1---+---+--+----+---t---+--------:-'---+-----1~~\
~0 ~,~219 1---+-f--~\-M-A-IN2...-SP-IL-L-Wl-A-Y-,O-U...l-T-L-ET----I...I----1
FACILITIES AND POWERHOUSE
2188 I--_+---I_--+--_O_P_ER-,-A_T_I_N_Gr----,-------,------I
1 I
2186 I---t-+j+-~OUTLET FACILITIES AT --+------1
~FULL CAPACITY
2184 10....-----'-_......11_---:....1 __.l.....-I----L.._----L...._.-J,
o 5 10 15 ,20
TIME (DAYS)
PROBABLE MAXIMUM FLOOD
fERHOUSE AND OUTLET FACILITIES
iRATING (MATCHING INFLOW)
10 15 20 25 30 35
TIME (PAYS)
I:10,000 YEAR FLOOD
/~II~NFLOW EXCEEDING _
/\
OUTFLOW CAPACITY
MAIN SPILLWAY OPERATING
(MATCHING INFLOW)
r MAX WSEL 2193.3
WATANA
~RGES AND RESERVOIR
CE ELEVATIONS
FIGURE E.2.154
J )1 -1 ]--1 1 ).1 .1 ))J ~-l --J
100
90
80
70
60
..50en
lL.uo 40
oo
~30
a:
<t
:I:
Uen
15 20
-
r /
//
~""'"
10
1.02 1.11 1.25 2 5 10 20 50 100
RECURRENCE INTERVAL (YEARS)
NOTE:BASED ON WEEKLY RESERVOIR
SIMULATIONS.
GOLD CREEK ANNUAL FLOOD FREQUENCY CURVE
WATANA OPERATION
FIGURE E.2.155
I I II I I II I I II I I II I I II I I
r-LEGEND:
GOLD CREEK PRE -PROJECT FLOW........WATANA OUTFLOWf------GOLD CREEK POST-PROJECT FLOW
r-
r-~
r-
r-
-~
-
-1
1\
1\•\~\-I \~
\ J \1\1\
~J ""'-I \
~"~\-,":-,.'T":""'.-r"l1\
\I
L..w-..~.--r-r ,..--.~~................,
'r"r.~~.--r"?..........,.....~....."
_....-,.,...r"'P .........._'\...~~:-:-:::-!\
-.....
I I I I III I I
88
80
72
64
56
In
LLu
048oo
UJ
(!)
0::«
~40en
r:::l
32
24
16
8
o
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1964 WATANA AND
SIMULATION U
. ..............:
DECEMBER
r'~
~."",-.JI---,
~..,
NOVEMBEROCTOBERAUGUST
r",,.""..,....../\/
,..."'"'..,'V,..."."."...'...'".'"...'"
JULY
MONTH
I GOLD CREEK FLOW
SING 1995 DEMAND
FIGURE E.2.156
I I 'I I I I I I JI I I II I I I I I I
-LEGEND:
GOLD CREEK PRE-PROJECT FLOW--.......•WATANA OUTFLOW----GOLD CREEK POST-PROJECT FLOW
-
-
-
-
-
~i-
'"I-rJ\A ~
~
r-
~A,
II..I'
::-:.":\i V I \/\.1\j'v'\,"1
'::-.-::.,:,:.~\I\"
I-\/"'.••..~J I'::.:-:.,:,:.~.':":.-:'.:":.':"),f.....•••••·••••••••••..•........1'::.";".~~~.-:-.~':":~.-:-:~~--!J i"OO\_.oJ
i-.........
I
I IIIIIIIIIIIII I I
88
80
72
64
56
32
24
16
8
o
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1967 WATANA AN
SIMULATION U~
II ,I I I I I I I I I r I I I ,I I
,I I I r I
-
-
-
-
-
-
~-
~\i u~,,\~1 -
.....
W \J i\~iJ'J '-.jE -J'I !
~J ~,,_-..J i j\"Jr·..·:
J'r ..~I \I ..p.'::.~
I \~",,/"\./
.;~r::----------_..J{......J ..................................-
'"I \.,J I ".~.....I1\J \i ..--It'\I .........~......_--..,yvy \.....,1 ~.......~..........~;:~
............_....-............:-
I I I I I I I I I I I I I I I I I I I I I 1 I I I
MONTH
JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
10 GOLD CREEK FLOW
31NG 1995 DEMAND
FIGURE E.2.157
.....
88
80
72
64
56
(Jl
"-U
o 48
oo
w
(!)
0:
<CG 40
lI)
a
32
24
16
8
o
I ,,)I ,r I I II I ,I)I 1 I I 1 I
-LEGEND:
GOLD CREEK PRE-PROJECT FLOW
...........WATANA OUTFLOW
~- - -GOLD CREEK POST-PROJECT FLOW
~
f--
f--
-
~
-
r-
-
-A~I
V .....,•\,.JV
-
A ~.I\A......f\/\...,...j------7,'~---------~--.....,.....-------.-----~-----.....,-..................-.....................-.
I I .1 I I I II r~
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE·.
TIME SCALE IS IN I NCREMENTS OF 10 DAYS.
1970 WATANA ANC
SIMULATION W
~!...
..........................
MONTH
GOLD CREEK FLOW
liNG 1995 DEMAND
SEPTEMBER OCTOBER NOVEMBER DECEMBER
FIGURE E.2.158
~
""~~'...
.................
~,r--
"-
j
--
............""""'-
10
2
0 10 20 30 ~
0/0 OF TIME DISCHA
10
2
0 10 20 30 ~
%OF TIME DlSCHAI
10 5
8
6
4
10
2
0 10 20 30 oli
%OF TIME DISCHAI
10 5
8
6
4
2
10 4
(/)8
aa.6
~4
I&J
~
It:«2:::t:
0(/)
C 10 3
8
6
4
2
2
10 4
8
(/)
6aa.
~4I&J
~
It:«2:::t:
0
(/)
25
10 3
8
6
4
2
-----~.--I--
.....----r----r---.r-....
D~CEr'B~R
-----------r---...
~~......-----r---
.JU1LY
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
F~BR~AI~Y
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
2
10 4
U;8
aa.6~
4I&J
~
It:«2:::t:
0
(/)
25
10 3
8
6
4
2
10 5 10 5
8 8
6 6
4 4
2 2
10 4 10 4
8 -....8
(/)6 -(/)6aa.aa.
~4 ~4
l&J l&J
~~It:It:
c(2 ~2:::t:
0 0
(/)~(/)
C
10 3 ---.....C 10 3
8 8
6 6
4 4
2 2
4
2
10 4
(/)8
aa.6,0
4
I&J
~
It:«2:::t:
0
(/)
C
10 3
8
6
4
2
---
~
~~-r-...---r-............
N~VE~B~R
"'-.---~"r---...r-.........,r-.........
'..--
.IU
1
NE
""""'-.--------.........
"~N~A~Y
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
l&J
~It:
~2
~
C
10 3
8
6
4
2
10 4
(/)8u..6~
l&J 4
~
It:
c(2:::t:
0
(/)
C
10 3
8
6
4
2
lOS
8
6
4
2
104
U;8
aa.60
l&J 4
~
It:
c(2:::r:
0
(/)
C
103
8
6
4
2
~r--.Ir--_
-.
""-r---'\
\
..~y
-1'00....--.-1---
~--r--.
"""""
OCTOBE R
I I
PRE-PROJECT FLOWS
WATANA OPERATION FLOWS
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
8en6~
0
4
LLI
<!la::
c(2~
0en
0 10 3
8
6
4
2
10 5
8
6
4
2
104
8en6~
~
LLI 4
<!la::
c(2~
0en
0
10 3
8
6
4
2
LEGEND:
,
'--..--~
..........
'"
SEPTI~"BER
I I I
-----
'--I--"--I---
.......
~
AP~I~
MONTHLY AND ANNUAL
FLOW DURATION CURVES
SUSITNA RIVER AT WATANA
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
en 8
~6~
LLI 4
<!la::
c(2~
0en
0
10 3
8
6
4
2
10 5
8
6
4
2
10 4
en 8
~6
~4LLI
<!la::
c(2~
0en
0
10 3
8
6
4
2
NOTE:
I.CURVES BASED UPON AVERAGE MONTHLY
FLOWS FOR 32 YEARS OF SYNTHESIZED
RECORDS DERIVED FROM HISTORICAL AND
FILLED DATA.
00
ED
o
DED
'-
r-_
r---.
~A~CHI
40 50 60 70 80 90 10
ARGE EQUALLED OR EXCEE
I
I
-r---,
r-....~
"'
,UI1Usr
40 50 60 70 80 90 I
ARGE EQUALLED OR EXCEED
-!--\.-.\'-\
i\.
"\~I""--
"\.
tN~UA~
40 50 60 70 80 90 100
ARGE EQUALLED OR EXCEEDED FIGURE E.2.159
\
\.',-
\.,".....--
............
'...
.........i'--
'.
1',
~....
-
"-"-~
10
2
0 10 20 ~
%OF TIME DIS'
10 5
8
6
4
10 2
0 10 20~
%OF TIME DIS
10 2
0 ,10 20 ~
%OF TIME DISI
10 5
8
6
4
2
10 4
U)8
IL 6
~4
IIJ
(!)
D::
~2:I:
0en
0 10 3
8
6
4
2
2
10 4
8en6IL
~4IIJ
(!)
D::
~2:I:
0en
0
10 3
8
6
4
2
10 5
8
6
4
2
10 4
8en6IL
~4
IIJ
(!)
D::
~2
0en
0
10 3
8
6
4
2
-----_.---..
""----~---......
..............
D~CE~8'R
~i'oo.....
~r--1"---1-
--.,"'.....-
dUllY
I--
"'"........."-100-.------
F~8R~A'Y
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TI ME DISCHARGE EQUALLED OR EXCEEDED
2
10 5
8
6
4
2
10 4
U)8
IL 60
4IIJ
(!)
D::
~2
0en
0
103
8
6
4
2
en
IL
3
IIJ
(!)
D::
~2oeno
10 3
8
6
4
2
10 4
en 8
IL 6
0
4
IIJ
(!)
D::
~2
0en
0
10 3
8
6
4
2
"-..........100-.
"r--r--~-~-1\'....-------
JUINE
~---
.........'-----r--r--....................
""
N~VE~8'R
~--....--
.........
"---r--~
......
J~N~A~Y
2
2
10
2
0 10 20 30 40 50 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 eo 60 70 80 90 100
'"·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10 5
8
6
4
2
104
en 8
IL 63
IIJ 4
(!)
D::~2:I:
0
U)
0
10 3
8
6
4
2
10e
8
6
4
2
104
U)8
IL 60
IIJ 4
(!)
D::
~2:I:
0en
0
103
8
6
4
2
IIJ
~
1 2
~o
103
8
6
4
........
"'-~---.~----------
'\.
"
I
MfY
----....--------....-....i"'--...
OCTC )BER
I I
PRE-PROJECT FLOWS
WATANA OPERATION FLOWS
2
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
.-8en6IL
0
4
ILl
(!)a:
c(2~
0en
i5 10 3
8
6
4
2
10 5
8
6
4
2
10 4
en 8
IL 6~
ILl 4
(!)a:
c(2~
0en
i5
10 3
8
6
4
2
LEGEND:
-------
"'--~--~r--r-------
AP~IL
~-....I'-....
1'_t--r--..-....,.,
r-..
",
I
I
SEIPTI~M8ER
I I
MONTHLY AND ANNUAL
FLOW DURATION CURVES
SUSITNA RIVER AT GOLD CREEK
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
en 8
IL 6~
1LI 4
(!)a:
c(2~
0en
i5
10 3
8
6
4
2
10 5
8
6
4
2
104
en 8
IL 6
0
41LI
(!)a:
c(2~
0en
i5
10 3
8
6
4
2
NOTE:
l.CURVES BASED UPON AVERAGE MONTHLY
FLOWS FOR 32 YEARS OF SYNTHESIZED
RECORDS DERIVED FROM HISTORICAL DATA.
00
ED
00
ED
---
-I---1--...--
IMA~CHI
30 40 50 60 70 80 90 I
SCHARGE EQUALLED OR EXCEED
....1-,
-~
'...--1-0 _
~
,UGjUST
30 40 50 60 70 80 90 I
~CHARGE EQUALLED OR EXCEED
"l\.
-1---'\.
'\.
~
"-"-r---...i'-...
I ~N~UA~
30 40 50 60 70 80 90 100
~CHARGE EQUALLED OR EXCEEDED
[FIGURE E.2.160
1""-...-
~......r--
~
'.................I"..
1'-'....
~-...
10
3
0 10 20 ~
%OF TIME DISI
10 6
8
6
4
3
10 0 10 20 3
%OF TIME DISI
3
10 -0 10 20 3
%OF TIME DIS(
10 6
8
6
4
2
10 5
en 8
&L 6
~4
IIJ
C)
It:4(2::E:
0
U)
0 10 4
8
6
4
2
2
10 ~
8
U)
6&L
~4
IIJ
C)
It:«2::E:
0
U)
is
10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
U)6&L
~4
IIJ
C)
It:~2
0
U)
is
10 4
8
6
4
2
--.1'--1'-...1"--I--
"'"'"
"""-......................-lo000o....
D~CEIMB~R
.......~-100----
.........~-~i'oo..
F~BR~A~Y
---~..-r-_"'"-
dUllY
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
2
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
U)
&L
~
IIJ
C)
It:~2o
U)
is 10 4
8
6
4
2
10 6
8
6
4
2
10 5
en 8
LL 6~
4IIJ
C)
It:«2::E:
0
U)
is
10 4
8
6
4
2
4
2
10 5
U)8
&L 6
0
4
IIJ
C)a::«2::E:
0
U)
is 10 .
8
6
4
2
-~...-.....-I""-...i""""o-o.-....:
JU1NE
~I-•--~-~------
--....-.....~--.................
JANUARY
I i I
~,.....---------~-............
N~VE~B~R
2
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
IIJ
C)
It:
~2
~o
10 4
8
6
4
10 6
8
6
4
2
10 5
U)8
LL 6~
IIJ 4
C)
It:
4(2::E:
0
U)
0
10 4
8
6
4
2
10 6
8
I
4
2
lOS
en 8
&L 60
IIJ 4
C)
It:
4(2::E:
0
U)
0 10 4 .
8
6
4
2
10 6 10 6
8 8
6 6
4 4
2 2
10 5 10 5
en 8 .....8
6 U)6II..II..
0 0 """.....4 .....4I&J I&J ..............
(!)(!)--~a::a::~-~«2 «2:::t::::t:~0 0U)U)~2i
10 4 ~...1'--2i 10 4---88
6 6
I 4 "'-4!r--.I--
r-----.....
2 ...........2
IMA~CHI
10 3
AP~IL
10 3
M~Y
30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
SCHARGE EQUALLED OR EXCEEDED lifo OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6 10 6
8 8
6 6
4 4
2 2
10 5 10 5.....8 .....8
r--.en U)
II..6 ...........II..6--I"'---ii_---.£~........."'-£-...I&J 4 -r--:----...4I&J(!)-r--=r:::::(!)a::~--.a::««:::t:2 ~:::t:2 --..:F::....:::0 0 ~--en U)10._-2i 2i ----10 4 10 4 -8 8
6 6
4 4
2 2
,U8IUST SE1PTI ~M~ER OCTC)B~R
10 3 10 3 I I _
30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
$CHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
NOTES LEGEND
I.CURVES BASED UPON AVERAGE MONTHLY PRE -PROJECT FLOWS
FLOWS FOR 32 YEARS OF SYNTHESIZED ---WATANA OPERATION FLOWSRECORDSDERIVEDFROMHISTORICAL
AND FILED DATA.
'~
1\'."....""--
"""-
'"MONTHLY AND ANNUAL"'""'---FLOW DURATION CURVES
~N~UA~SUSITNA RIVER AT SUNSHINE
0405060708090 100
~CHARGE EQUALLED OR EXCEEDED FIGURE E.2.161
~~
....
--1---
:::::--~t:-o
3
10 0 10 20 ':
0/0 OF TIME DIS
10
3
0 10 20 ~
%OF TIME DIS
3
10 ··0'10 20 ~
%OF TIME DIS'
10 6
8
6
4
2
10 5
en 8
I&-6
~4
UJ
C)
II:
c(2~
0
(I)
C 10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
(I)
6u..
~4LLI
C)
II:
c(2~
0
(I)
C
10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
(I)6I&-
~4
UJ
C)
II:
~2
0
(I)
C
10 4
8
6
4
2
.......~---....-......--"1----~....~
-""-
D~CEIMB'R
-.....0 -.-.1---'--I-----::::r--:::::e:-......
dUlLY
----~-----'"--
--
F~BR~A~Y
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
2
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
10 5
en 8
I&-60
UJ 4
C)
II:
c(2~
0en
C
10 4
8
6
4
2
(I)
I&-
~
UJ
C)
II:
~2o
(I)
C
10 4
8
6
4
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10 5
en 8
I&-6
·0
4
LLI
C)
II:
c(2~
0
(I)
C
10 4
8
6
4
2
~.-..~..-
...........--..-I--1---r---....r----......---
~VE~8'R
~:::-:::-::t:::r:-r---
~~
dU1NE
1'-......----r-1--.1---~--..........i'ooo..---
d~N~A~Y
3
10 0 10 20 30 40 50 60 70 80 90 100
'"OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
3
10 0 10 20 30 40 !SO 60 70 80 90 100
'".OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
2
LLI
C)
II:
~2
~
C
10 4
8
6
4
2
10 5
(I)8
I&-6~
UJ 4
C)
II:
c(2~
0
(I)
C
10 4
8
6
4
2
.....10 5
(I)8e6
4
10 6
8
6
4
2
10 5
en 8
I&-60
UJ 4
C)
II:
c(2~
0
(I)
C
10 4
8
6
4
2
10 6 10 6
8 8
6 6
4 4
2 2
10 5 10 5
en 8 ....8 -6 U'J 6 -LL LL -.........~0 ~-r'\....4 ~4 "\IA.I IA.I
(!)(!)0:::0:::c(2 c(2 r1 ;%:%:
~--0 --..0---en ~-r-l------en
I---2i 1--.-2i---10 4 1'00...~10 4
8 -8
6 6r--_-I--.
4 4
2 2
IMA~CHI
10 3
AP~IL .
10 3
M~Y
30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
SCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6 10 6
8 8
6 6
4 ..4
2 2
1'-1---10 5 r--.-_10 5
en 8 ....8r-_.enLL6-1""00...LL 6 ......~---I'....~.......~
IA.I 4 -4 --..;;::~IA.I .._-
(!)(!)-I""-•0:::0:::---..---..1"-....c(c("'---%:2 %:2 ---~0 0enen
2i
10 4 is
10 4
8 8
6 6
4 4
2 2
,U8
t
UST
10 3
SE1PTI t"~ER
10 3 °ICT«)B~R
130 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100~CHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
-
NOTES:LEGEND:i
I.CURVES BASED UPON AVERAGE MONTHLY PRE -PROJECT FLOWS
FLOWS FOR 32 YEARS OF SYNTHESIZED ---WATANA OPERATION FLOWSRECORDSDERIVEDFROMHISTORICAL
AND FILED DATA.
;1'.
"-'..:'-
i"\..."1\'.........
i
......--MONTHLY AND ANNUAL
."-FLOW DURATION CURVES.......
SUSITNA RIVER AT
SUSITNA STATION
'N~UA~
o 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED FIGURE E.2.162
100102030405060708090
PERCENT OF TIME DISCHARGE EQUALLED OR EXCEEDED
\
"'"•
'"\,
'.....~........-\,1""'----
\-............----"""""-,-i'--............~""""""-........
\--~,
\
\
'"~~
\
\
\06
0.4o
40
2
80
0.8
10
20
60
~u 8
ooo
:::6
lLl
(!)a::<t
~
~4
Ci
f'i""l
I
-
LEGEND:
-PRE -PROJ ECT
----WATANA OPERATION -1995 DEMAND
NOTE:FLOW DURATION CURVES ARE BASED
ON MEAN WEEKLY DISCHARGE.
ANNUAL FLOW DURATION CURVE
SUSITNA RIVER AT GOLD CREEK
PRE -PROJECT AND WATANA OPERATION FIGURE E.2.163
10846
WATER TEMPERATURE (OC)
2
,~V-
12/12/80 9/29/80 /131/80
J
\\'/,
\\V4/30/8~
~:-----\r--
60
80 o
20
o
(f)a::
LLJ...
LLJ
~
-40
:I:...a..
LLJo
.-
-
WATER TEMPERATURE PROFILES
BRADLEY LAKE,ALASKA
SOURCE:CORPS OF ENGINEERS 1982 FIGURE E.2.164
1 -I 1 1
i
UJ
~
:a~
i
UJ
~
CDc:r
~
%
(!)
LLi
%
60
:~
50 •,x .J ----~-_..---c?J
~.-x X l\:------,."._..--C:J,..x ----""0 0
/""",0r:x .;0,X "",""'"0(0x/ 0
~
40 ~'11:'\r x p
(X 0 /
•1:o "
I "",.
0 "/'
30'/
!' X
e::/
X )
I X 0/
X I
20·)(0f
X I
X 0 1
):;I LEGEND:~
)0 I ---JUNE I -PREDICTED
10 I X JUNE 18 -MEASURED
~I -0 JUNE 18-PREDICTED
•X I 0 JULY 14-MEASURED
I X I - - - J ULY 14-PREDICTED
I 1982 DATA I~I I0
4 5 6 7 8 9
TEMPERATURE (Oe)
10 II 12 13 14
EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES JUNE-JULY FIGURE E.2.165
~~~']J ._))
141312II109
TEMPERATURE (Oc)
8765
<:1 x
I V
1 X
fD x ..J ~x
I x ~-I10X1'''''
",.,.....--
I ~
I ~-,/~
l.:)~vL"J:._-1-~
I ~/~-~B
I
.X,~8/
,
V l":'1 I
J
j .~~'
~/I
~I
r-1 -I......\:J I
I LEGEND:
El
I 8 AUGUST II -MEASURED
•I ---AUGUST 11-PREDICTED8rJ0IXSEPTEMBER9 -MEASURED)~:I SEPTEMBER 9 -PREDICTED,
0 SEPTEMBER 21 -MEASUREDI- - -SEPTEMBER 21 -PREDICTED
8<0 I 1982 DATA."---J I.
m /-
)~
I
'
0x1 •
I
:I
50
0 4
10
20
60
~
Ui
I-
Ui
!40
~o
I-
.~
I.Ll>g
<t 30
l-
X
(!)
W:r:
EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES AUG -SEP FIGURE E.2.166
1 1
10
-
98
GJ
GJ
fa
GJ
GJ
7
I
6
X
5
TEMPERATURE (OC)
43
o
200
601--_.__~__~+.I
<::.p -----X'
o ~--~I
o ~I x ·
I I
50 1 I I,...I •
-I I I I I
o I
en 0 1 X I'~0 I
w 0 I ·~40 G I I I~01 X I
5 ~I~~.
>Io~~30 i I~I x •1°I~I I~I .
:I:I ·
!x I
201 I I 1 I ",I .LEGEND'
I )G OCTOBERI4-MEASURED
I X,GJ ---OCTOBER 14-PREDICTED
10 I I I I I /'X NOVEMBER 4 -MEASURED
I I I (NOVEMBER 4-PREDICTED
I I'0 JANUARY 31-MEASURED
I X GJ - - -DECEMBER 31-PREDICTED
I i 1982 DATA
L ___~~~~l
EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES OCT -DEC FIGURE E.2.167
SOURCE:BC HYDRO 1982 UNPUBLISHED DATA
4
FIGURE E.2 .168
32
TEMPERATURE (0 C)
o
""\'...,,...~,
'\
\~
"t~,
~PRILI4
?\~:\,\
\\~\\
~..\
'~\APRIL 15 \\'\
\\.,,"\\\
"""'r-,\\\
\"
\"\\\
\"'"\\\
\\,.\APRIL 14 \ \
\\,,
\\,,
\\
\\
"\\\,
\'.\\
\
\\\
\
LEGEND:
-~SITE I FOREBAY
--SITE 2 UPSTREAM OF FOREBAY
------SITE 3 FINDLAY FORKS(APPROXIMATELY 60 MILES UPSTREAM)
LAKE WILLISTON
TEMPERATURE PROFILES
APRIL 14-15,1982
150
160
140
130
120
110
100
90
t-
W
W
~
I..L
~80
t-o..
W
0
70
60
50
40
30
20
10
0
NORMAL MAXIMUM OPERATING
RESERVOIR LEVEL (EL.2185FT.)
EL.2151 FT.
El.2114 FT.---
El.2077 FT....;..._
MINIMUM OPERATING
RESERVOIR lEVEL {EL.2065FT.)
EL.2040 FT.---
20 FT.(TYPICAL)
WATANA MULTILEVEL INTAKE
FIGURE E.2.169
14
12
4
10
u
0
ilJ 80::
::l If0-
e:(I0::~ilJ
D...":::!:,...
ilJ (f0-
G
2
a
II 21 II 21
JUNE JULY
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2)BASED ON 1982 DATA
EKL
RESERVOIR TEM
JU
'\I 1 ~
""~~lJ'vv ,fvJ r"jJV 11/:\'1 t\0rt',
1\~J L~--..~"\.------r...._I \--I --...._1 \.__~
\I--J -.---L-...1-,--SIMULATED OUTFLOW-SIMULATION RESTARTED --TEMPERATURE
,
I I I
31
MONTH
9
AUGUST
19 29 8 18
SEPTEMBER
28 8
JTNA LAKE
)ERATURE SIMULATION
N TO SEP
FIGURE E.2.170
14
12
10
u
~8
wa:
::>
I-
<[
a:w
0-
::Ii:w
I-6
4
2
o
/""RECORDED OUTFLOW TEMPERATURE
1-..--./
1---,~..............
'~V,\
',-vv'""
~........"'..
SIMULATED-
OUTFLOW
TEMPERATUI
I
8 18
OCTOBER
28 7
NO
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2)BASED ON 1982 DATA.
EKLUT
RESERVOIR TEMPE
OCT
\
\A..
---~Y __1
C ~--A pAl---7
RE
,
I I
17 27
VEM86R
MONTH
NA LAKE
HATURE SIMULATION
TO DEC
7 17
DECEMBER
27
FIGURE E.2.171
-
r~
-
-
2200
2150
2100
2050
~2000
~::;;
l&J
...J
l&J
1950
1900
1850
1800
17~0
,
,
_I
I
I
I
I
I
_J ,
I
(
V--1 /
I /
,,/
L~....~Io'
~-~::;i"":i'"
k--:::;;'-
~-
I,
II
I
LEGEND:
JUNE 1,1981
---JULY 1,1981
---AUGUST',1981
II
•
-
2 3
NOTE:TEMPERATURE PROFILES
SIMULATED USING 1981 DATA.
4 5 6 7 8
WATER TEMPERATURE (Oe)
9 10 II 12
WATANA RESERVOIR TEMPERATURE PROFILES
JUNE TO AUGUST
FIGURE E.2.172
'"'"'
-
.....
.....
2200
2150
2100
2050
i='w
l.LJ
.!=.
~2000
ti:>
l.LJ
..J
l.LJ
1950
1900
1850
1800
1750
,...u
\I
I,
'"I......I
'..:"!'I..
I
I
~//'
~~
~,~
/~
I ,
~Vi"
~
\~-'l~
~~~~
I ,I\~f/
R
=1
I
I
I
:1
·1 LEGEND:
II ----SEPTEMBER 1,1981_
II OCTOBER 1,1981
.I ---NOVEMBER I,1981
:1 ---DECEMBER I,1981
II _•••-DECEMBER31,1981_
I
I
~
2 3
NOTE:TEMPERATURE PROFILES
SIMULATED USING 1981 DATA.
4 5 6 7 8
WATER TEMPERATURE (OCl
9 10 II 12
WATANA RESERVOIR TEMPERATURE PROFILES
SEPTEMBER TO DECEMBER
FIGURE E.2.173
14
i___':'1
lNFLOW-
/".-./',r"'_('
,'--10--,,
J,,' ,
I I ,,I
~'\,.),,\,
I ,r \I
~L'~_I-_J ~
f"1:\-.OUTFLOW V
/"'\\
I ,:'I6f,I,I
I ,I ,I
I V II
12 ~"'\,/\
10 I
V'
8IJJa::
::::>
I-
0([a::
IJJa..
~
IJJ
I-
4
2
o
10 20 30 9 19
JUNE JULY
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2)BASED ON 198/DATA,WATANA OPERATION
3)RUN W4020j WITH OUTFLOW TEMPERATURE
FOLLOWING INFLOW TEMPERATURE.
4)JULY INFLOW TEMPERATURES ESTIMATED
WATANA RESERVOIR INFLO
JUN
('-..._A A ....,...........
, I ......'",,,
\I,
I ,
~,JL._
29
MONTH
8
AUGUST
18 28 7 17
SEPTEMBER
27 7
W AND OUTFLOW TEMPERATURES
TO SEP
FIGURE E.2.174
o
I
"""'.........
....-.-----.........~':...TFL/
..................................
....,.....,.........
...,
,,'"
r \'NFL7
~-r-""".-/~-
14
12
10
u 8
0
W
0:::
::::l
f-
<:{
0:::
Wa.
:::::6w
f-
,..'-
4
2
7 17
OCTOBER
27 6
NO
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2)BASED ON 1981 DATA,WATANA OPERATION
3)RUN W4020;WITH OUTFLOW TEMPEF1ATURE
FOLLOWING INFLOW TEMPERATURE.
WATANA RESERVOIR INFLO~
OCT 1
------------~----,~-~--------------------------
I
•'\
\
""--"'\
\.-..----------------I---------
,
--I I
6 16
DECEMBER
26 5
,AND OUTFLOW TEMPERATURES
·0 DEC
FIGURE E.2.175
12.5
12.0
11.5
11.0
--------__JUL 31-----------~-...........-----~--
10.5
(J
0
wa:
::>
!;;:
10.0a:wa.
~w
I-
9.5
9.0
8.5
AUG 31
8.0 AUG 15
----~._-
7.5
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
NOTE:
I.MODEL ASSUMES 1981 METEOROLOGICAL DATA
RECORDED AT WATANA.
2.WATANA TEMPERATURE AND DISCHARGE FROM
DYRESM MODEL.(RUN WA4020l .
RIVER MILE
WATANA
DOWNSTREAM TEMPI
WATANA DISCHARGE (CFSl:
JUN 15 4410
JUN 304210
JUL 15 4130
JUL 31 3970
AUG 15 6250
AUG 31 21000 (RELEASE)
----------'---~
...;::a_-..________
-~-----~~----
149.00 155.00 161.00 167.00 173.00 179.00 185.00
OPERATION:
ERATURES -JUN TO AUG
FIGURE E.2 .176
9.0
B.5
B.O
7.5
7.0
u
0
w 6.5a::
::l
!«a::w
ll.
::::i!:w 6.0f-
5.5
5.0
4.5
4.0
-------/----------
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143
R
NOTE:
l.MODEL ASSUMES 19BI METEOROLOGICAL
DATA RECORDED AT WATANA.
2.WATANA TEMPERATURES AND DISCHARGE
FROM DYRESM MODEL.(RUN WA4020)
WATANA
DOWNSTREAM
WATANA DISCHARGE ICFS);
SEP 15 12200 (RELEASE)
SEP 30 9460
,00 149.00 155.00 161.00 167.00 173.00 179.00 185.00
IVER MILE
OPERATION
TEM PERATURES -SEP
FIGURE E.2.177
4.0
3.5
3.0
2.5
0e..
ILl
0::
::l
~2.00::
ILl
IL
::Ii
ILl
~
1.5
1.0
0.5
o
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTES:
I.MODEL ASSUMES 1981 METEOROLOGICAL
DATA RECORDED AT WATANA.
2.WATANA TEMPERATURES AND DISCHARGE
FROM DYRESM MODEL.(RUN WA4020)
WATAN,
DOWNSTREAM TEMF
WATANA DISCHARGE (CFS);
OCT 15 6110
OCT 31 5820
NOV 15 6580
NOV 31 10070
DEC 15 10540
DEC 31 12500
149.00 155.00 161.00 167.00 173.00 179.00 185.00
A OPERATION =
~ERATURES -OCT TO DEC
FIGURE E.2.178
14
12
/\I
, \I
10 '~,
"""
u
0
-.'-w 80::
~
l-
e:(
0::
W
D..
:::Ew
I-
'""",",0::6w
~
~
~.........
4
2
o
10
JUNE
20 30 10
JULY
20
NOTES:
I.TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2.OBSERVED DATA FOR SUSITNA RIVER ABOVE
FOURTH OF JULY CREEK (RM 131.3)ADF8G 1982.
3.PREDICTED WATER TEMPERATURES (RM 130.5)
DURING WATANA OPERATION USING 1981 DATA.
4.TEMPERATURES REPORTED ARE MEAN DAILY
VALUES.
COMPARISON OF 1981 OB~
NEAR SHERMAN AND ~8
WATAN
30
MONTH
(
1 ~Ir,I \,
" I I I
9 19
AUGUST
29
OBSERVED
8
,1'--.
I \~
\ \1\~\,
18
SEPTEMBER
./\(
\ I,
28
SERVED WATER TEMPERATURES
I TEMPERATURE SIMULATION OF
A OPERATION
FIGURE E.2.179
4.0
3.5
3.0
2.5
u
0
wa:::
='I-2.0<fa:::wa..
:::ii:w
I-
1.5
1.0
05
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.QO
RIVER MILE
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT WATANA.WATAr
DOWNSTREAM TEM
OUTFLOW
WATANA DISCHARGE (CFS):
OCT.6770
NOV.8670
DEC.10300
JAN.9400
149.00 155.00 161.00 167.00 173.00 179.00 185.00
~A OPERATION:
IPERATURES -OCT TO JAN
TEMPERATURE 4 0 C
F[GURE E.2 .[FlO
4.0
-
3.5
3.0
----------~-APR 30 -----------------~-..,.----_.--...-------.,
APR 15 ---...-..................---_.----",,,,,,,,.----'
2.5o
o
wcr.
:::l
I-
~2.0w
a.
::::i!:w
I-
1.5
1.0
Q5
0.0
95.00 101.00
./
/"
107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT WATANA.
WATANA
DOWNSTREAM TEMPE
OUTFLOW TE
-----------.....------
---
WATANA DISCHARGE (CFS!:
JAN 9400
FEB 8690
MAR 8100
APR 7480
i49.00 155.00 161.00 167.00 173.00 179.00 185.00
OPERATION:
:RATURES -JAN TO APR
MPERATURE 4 0 C
FIGURE E.2.181
4.0
3.5
3.0
1.0
05
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT WATANA.
WATANA OPERATION:DOWNSTRI
OUTFLOW TEMPE
WATANA DISCHARGE (CFS):
OCT 6770
NOV 8670
DEC 10301
JAN 9400
149.00 155.00 161.00 167.00 173.00 179.00 185.00
EAM TEMPERATURES -OCT TO JAN
:RATURE 4 TO 2°C
FIGURE E.2.182
4.0
3D
2.5
u
0
W
0:::
::::l
!<i:Z.o ----APR 300:::
Wa...-::2:APR 15w-----I-
1.5
1.0
0.0
95.00 101.00 107.00 113.00 119.00 125.00 131.00 137.00 143.00
RIVER MILE·
NOTE:
I.MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND MEAN
MONTHLY FLOWS AT WATANA.WATANA OPERATION:DOWNSTRE
OUTFLOW TEMPE
WATANA DISCHARGE (CFS);
JAN 9400
FEB 8690
MAR 8100
APR 7480
149.00 155.00 161.00 te7.00 173.00 179.00 185.00
AM TEMPERATURES-JAN TO APR
:RATURE 4 TO 2°C
FIGURE E.2.183
r---------------.-..u,~...----'----------------------_
ICE FROfI
NOV 30
I
I
I
I
I
120
RIVEI
ICE FRONT ICE FRONT
NOV 20 NOV 25
I .
I I
I I
I I
I I
I I
I I
I I
I I
95 100 105 110 115
10~
lJJ
IL.
II)
II)
lJJ
2
:ll:::
U:c 5
I-
NOTE:
I.BASED'ON RESERVOIR OUTFLOW TEMPERATURE MODEL(SEE FIGURE E.2.175).
2 THE DASHED HORIZONTAL LINE OVERLYING SOLID LINE
INDICATE THE INCREASED ICE THICKNESS AS SIMULATED.
FOR THE NEXT ICE FRONT LOCATION.
OL------.L..-----...L..-...l...-~-------I...----.........IL-+_
NOTES:
I.BASED ON RESERVOIR OUTFLOW TEMPERATU RES STARTING AT 4°C
ON NOV.lAND DROPPING TO 2°C BY JAN 15.
2.THE DASHED HORIZONTAL LINE OVERLYING SOLID LINE
INDICATE THE INCREASED ICE THICKNESS AS SIMULATED
FOR THE NEXT ICE FRONT LOCATION.
95 100 105 110 115 120
RIVER
WATANJ
SIMULATED ICE THICKNE
ISO145140135130
FINAL
H ICE FRONT ICE FRONT ICE FRONT
DEC 5 DEClO DEC 15
I I IIIII
I I I
I I I
I I
I
125
:R MILE
:>NT
125
t MILE
130
ICE FRONT
JAN 15
I
[
I
I
I
135 140 145
FINAL
ICE FRONT
FEB 15
I
I
I
I
I
150
~OPERATION
::SS AND ICE FRONT LOCATION
FIGURE E.2.184
10
l-
W
W
IJ..
W
(f)
<l:w DEC 15-0:::
(Jz 5
w
--,
(!I \----,
<l:\Il-
(f)\~/0:::w>
0:::
0
95 100 105 110 115
NOTES:
I.BASED ON RESERVOIR OUTFLOW TEMPERATURES STARTING
AT 4°C ON NOV I AND DROPPING TO 2°C BY JAN 15.
2.CHANGE IN STAGE DURING FREEZEUP BASED ON OPEN
WATER DISCHARGE OF 9900 CFS.
WATANA DISCHARGE (CFS)
NOV 8670
DEC 10300
JAN 9400
FEB 8690
10
l-
Ww NOV 20IJ..
W
(f)
,1<l:w NOV 250:::
(J 5~~w /(!I \,
j:!\,\--_,,1(f)
a::w>
a::\
0
95 100 105 110 115
NOTES:
I.BASED ON OUTFLOW TEMPERATURES FROM RESERVOIR
TEMPERATURE MODEL.
2.CHANGE IN STAGE DURING FREEZEUP BASED ON OPEN
WATER DISCHARGE OF 9900 CFS.
WATANA DISCHARGE (CFS)
NOV 20-26 8890
NOV 27-3 9410
DEC 4-10 10070
DEC 11-18 10300
WATAN
RIVER STAGE INC
~
"1\
I \
JAN 31 ,\/,
\DEC 31 yFEBI5IJAN15I\/
~\I \I ,
I \I \
..../\
I \1 \
I ~\...'1
I ,
L
120 125 130 135 140 145 150
RIVER MILE
DEC 10
150145
"I \
140
I VDECI5
\"rUPSTREAMoJ\.LOCATION OF
."ICE FRONT,
----
135130125
/\
"/\......../'V~
I\¥'DEC 5
120
RIVER MILE
\IA OPERATION
;REASE DUE TO ICE COVER
FIGURE E.2.185
J
/
v
/
/
/
II
1/,
)
_1./
j,/'
180
165
150
135
u;120
LLu
o
0105o
w
~90
<l:
J:
U
~75
0
.-60
45
,...
30
.-15
0
1.005 2 5 10 2050100 1000 10,000
RECURRENCE INTERVAL (YEARS)
.-
NOTE:
FLOWS ROUTED THROUGH
WATANA IMPOUNDMEN~
DEVIL CANYON
FLOOD FREQUENCY CURVE
FIGURE E.2.186
/
/
,/
/
.:.
8...
<J
\oj
9J
/'"
(
4-I
....()
-~-'~."\
'-'\
--
\'
,\"
l '
\
,',,,
0 I'"IVER
S,U./,,/--,.
I
//
"
REFERENCE:BASE MAP FROM RaM ,19BI-1"·200'OEVIL CANYON
TOPOGRAPHY,RETRACED AT 25'CONTOURS
USBR,I960
COE,1978
WCC,I978
BORROW SITE G
L EGEN D
-----BORROW SITE LIMIT
NOTES
ENTIRE BORROW SITE LIES WITHIN PROPOSEO DEVIL
CANYON RESERVOIR LIMITS.
2.BORROW SITE LIMITS BASED ON FIELD AND AIR PHOTO
INTERPRETATION OF BORROW MATERIAL.FINAL UMITS
SUBJECT TO RESULTS OF DESIGN INVESTIGATIONS.
3.25 FOOT CONTOUR INTERVAL ADDED FROM SOURCE
MAP (REFERENCED)IN BORROW SITE ONLY.
4.PHOTO TAKEN AUGUST,1981.
DEVIL CANYON
BORROW SITE G
SCALE O~IIIIIIIIII~2~0ii;0iiiiiiiiiiii4~90 FEET
FIGURE E.2.187
'.
I
§
I
~,,
/
\\
I ,QQ(!'------I
JlI 14
~'-""I""OOO=--__
....!!.~ooo __
Zl
/
/
,,
REFERENCE:BASE MAP FROM R 8 M,1981 -1"=200'
DEVIL CANYON TOPOGRAPHY.
COORDINATES IN FEET,ALASKA STATE PLANE (ZONE 4)
C
BC
l
1.1
,I
I '
\
LOCATION MAP
0~1IIIIIIIII1IIIIIIIII4"'iiiiiiiiiiIiiiiijjS MILES
SCALE '0
LEGEND
---SORROW/QUARRY SITE LIMITS
NOTES
TOPOGRAPHY AND DETAILS SHOWN ON INDIVIDUAL
FIGURES .
.'-.
SJS •, f
o
SCALE i
1000 2000 FEET
DEVIL CANYON
ORROW SITE MAP
FIGURE E.2.188
d
It;
\
---./
0 0 0 0
0 0 0 0
0 ~0 0 0
0 II)ID .,
(\l --etJ ID ID ID
W W W W
)/-,\Ii II,
/
N 3,212,000
N ,216,000
N 3,21 ,000
REFERENCE:BASE MAP FROM USGS 1:63,360 ALASKA QUADRANGLE
TALKEETNA MOUNTAINS (0-5).
COORDINATES IN FEET,ALASKA STATE PLANE
(ZONE 4)
DE
QU
0
0
0
0
N
0
-
0
lD
0
l.&J
-<0
\
/~
/
SCALE
EVIL CANYON
~ARRY SITE K
LEGEND
---MATERIAL LIMITS
NOTES
I.ENTIRE QUARRYPROPOSEDRESER~g~ci~,~OUTSIDE OF
2.MATERIAL S.LIMIT LIMIT SHOWN IS~-igP:~fA~~~~M~~~~:~2~~:~:~OfO
LOCATION OF SASME~L:~CK CLIFFS,AND
3.CONTOURS TRAC~EFERENCE BAS~D :ROM ENLARGED
NTERVALS.AP,AT 100 I 1
o~~~~~~IO~O;O;'~I 2000 FEET
!
FIGURE E.2.189
-
13,600 15,20011,300
DISCHARGE (CFS)
6,800 9,0004,700
90 t----t-I---+----+---I-----_+__~"---------+__----_+__----_+__-~___I
74 t----t-------+-----+------+------+------+-------1
86 t---f--t----------,f---+-----_+__----+__-----+------_+__--___I
',800 2 1300
94 r+-..,......----...,....-----..,..._.----~----...,.......----..,..._.-__+__
~0
>-uz 82w
Q
l.L
l.L
W
~
78
70 ....l........1....-,,1..-....1....-""""'--__---'
100 200 300 400
PLANT OUTPUT (MW)
500 600
DEVIL CANYON -UNIT EFFICIENCY
AND DISCHARGE OPERATING RANGE
(AT RATED HEAD)
FIGURE E.2.190
2200
MEDIAN YEAR
(WY 1966)--
MAX YEAR
(WY 1956)
\
\
\
"'",
\
\
\
\
\
\,,
"'"''\
\
\
\"/"/"
.....ww
~2130
zo
~~w 2120
--Iw
2110
2100
2090
2140
2080
2170
2180
2070
2150
2160
2190
-
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
WATANA RESERVOIR WATER LEVELS
(WATANA AND DEVIL CANYON IN OPERATION)
FIGURE E.2.191
1460
1450 I MAX YEAR "/,-MEDIJ\N
I (WY 1956)'V~MIN YEAR
YEAR'
\~(WYI966)
~I (WY 1970)
~1440
~I ~~z I~1430 I:;
w I.J '\lLII420 I
I
1410 "
1400
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
DEVI L CANYON RESERVOIR WATER LEVELS
FIGURE E.2.192
40 1-}=
I'
I'
II
'"30...II ,
<J I'
I,I
§I',II I
I lJ ,
II II "Il I
I I'II 'I "II I
I I'I'II I'III II I'I
ZO I "L Il,.I-.l,~
"JO II '1 '1 ,I I
II 1 I I I
(.)I'I,I',1.11 I I'I ~I I I I
'"/1 I'U 1..11 I 1 I ,I I111II I I
15 I I ,,I ,I I
10
0
~19~19!12 19:)3 1954 19:):)19:)6 19~7 19~8 19~9 1960 1961 1962 1963
Lt:G£ND:
[~.=J INFLOW WAl
•OUTFLOW
2200
6
~
r~
1 l2000
19~0 19:)1 19~2 19~3 ~195~~6 1957 1958 19:)9 1960 1961 1962 1963
WA1
+±~
-
~J\~~[\\~~iJ\Jt
JI ~nl\J\
In n.
¥~lnr lf U ~r L r
UUlJt W1 if ~I
".Tr 1;I ul
If I
1=1 --r --
l --I
T --
-
20
I:)
Ul...
<J
§
~10
~
(.)
'"is
o
1950 19!>l 19lI2 1954 195~1956 19~7 1958 1959 1960 1961 1962 1963
NOTE:
BASED ON 2010 ENERGY DEMAND
DI
,...
WATANA AND DEVIL C~
I ""
I---+----+---I---I----~--~-----_~I
,I'1:
I n"I'I
: i I ,I'r:'l 1111 :1 f'j II nIl
:I,n I'll I,',~II '",," I 1'"II ,'I,Ii '"IJ , 'I ,I
,jl,',UI 1'1 IU,I,I,' I I'"I , ,~"4 '.;.I II I'"I':'I
, ,I,:'I I I,-,-,--Ti ",I',I I'I I I I
I , I ,"11 " I ,it I"'I I ,"'11 1 I ',~1,I :r I,I .."
, ' I I I L "I I ,~I I I I 'u,I 'I 1 r I I ",':" I
'I h"'"J'~~-i --I "',--1,+---';,+I "'",r 'I 'I "",I I I , ' "I I
I I n I Ft.I I r1 n rl I I::~I I I In:I r
l i I I n I :1 :1 ~I ::I
',,f'.,I .Il,",J1 i '11 n'..""'l~_-/l-:,n "',Il,,:l,.J-",I l:"1.s'\..I:I l Jl,."I I 1.1\.,:lAo :
U ~::IU 1))~!!I~d :l!l~:'lin ::KJ>,:~U !-i~:Ill\.!Y V 'hN 'l,llt..:~~'l~l In I'll ~i IU"h 1-'1.,:~!v',_,~I-~!.t1 ~U lJ-l-J·UL_~LJu,.~~JU\~1'J~l~::lJ [V~lt ,~E II!'t
1964 1965 1966
WATER YEAR
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1978 1979 1980 1981
TANA INFLOW AND OUTFLOW
1964 1965 1966
WATER YEAR
1969 1970 1971 '972 1974 1975 1977 1978 1979 1980 1981
TANA RESERVOIR ELEVATION
-I
f\JJ\1\IJ~~J\n j\..,I~~~\1\~\
'lJ 1 If ~UI I)uu
In nl II 1 In ~IL f'1.I
11 In In n In In nIl
u lJ 1fJ ~
+=
UlJ
LJJ )UI [)U IIrV ~
,-,-I-e---
-
'964 '965 1966
WATER YEAR
:>EVIL CANYON INFLOW
1967 1969 1970 1971 1972 1973 1974 1976 1978 1979 1980
~NYON SIMULATED RESERVOIR OPERATION FIGURE E.2.193
196319621961196019591958Ite119l16111115I~11111319!52ltelIlIlIO
--\-[-'---1 -I -·_·-T --I
I
I
L--.----
--
~\AIn
I
J~J~\1\J\r \IJ\1\\l 1['~f ~r [,1 J1n ~I
n n .n
l r lJl W ~l ~~
I---,--
C=l -t-I --o
20
Vi 15
IL
0
§
...
'"a:10«
J:
0
III
is
II
I I
-
J l
I
I I
_I_~I J I II,
1415
E
~
~14211
~
.J...
131&
IlIlIO tlIlll 19112 19l13 '954 19~1956 1957 1958 1959 1960 1961 1962 '963
DEli
I
1lO1---t---+---t----:----
I
I '---tit=I
Ii
II
I,
I
r
I,
I,
(\InrI
:
\.JJ
GOLD CR
1958 1959 1960 1961195319541911519l16195119521911019111
LEGEND'
[~=-~PRE
IIlIPOST
0'-
401---I---+---t--+--.---t-----t--
I I i!
I i ,I
n [l II
II I~n "301---+---1--1;-[-,---1----;1----".--,+----+,-+,+--~II --~I--H,,---!I
I:'~,,~,,i''I 'I'"I ~r.l I L , "'I I'II."r---!-I--+--I~I'+---t7'-+--..."+t1+----,1 I ft j\,.'1--.
",,,I I I I,~I,L.,r :,~I I ,l,
""n II I,,11'1 ,I I I I ,", 'l,'I
.."I~'la~_1 "I I 'e.II I '"I I "20 1--,r,!-l,Ir!----i',-4ot--+,-:;r I I:1 i I"'-t --rt ~:r-r ~:I ::
I 'I'I ,J:I "~, "I L '~,,
'I " I I " I I ",, I I ,J'"I 1II I ,"r ''-I ',.-I ----r'-·"~J-r..i I ...111 4:1-1 J1'l.i ni\~/1".]01 (\ri.~~j 1\:I:!\~D'I\m
r :~"-~l.~~:uJ ~l~~(,1
U J ~~U ~11J~j 11J IU'~!U'~V'
~~'-~U I I\J U-\J ~)I~J
1962 1963
III
ILo
o
~
...
'"a:c
J:o
III
is
NOTE'
8ASED ON 2010 ENERGY DEMAND
WATANA AND DEVIL Cj
UUl )n
19811980'-19-7-6""""-19-=77 ~'--::-9=C78-L 19791975
I --
I
I I I
I
1
n ~,n IJ
\n 1\n\
I
n ~~n~I~l
n )
rJ I l
I~~~U l U ~
I
1974197319721971
I
I
1f\!\
111 1
n n n
Lv1 ~l~lJ
-
I
1970
.~---
1969
I
1968
r\n n
[
I
i
r
1961
1--.----
u tr
1965 1966
WATER YEAR
I
1'-
1964
--
DEVIL CANYON OUTFLOW
h--~-~--~.----.-.
l l u u I~l I l
f--L---L----'__-"--~'___...J..:_
1964 1965 1966
WATER YEAR
1967 1968 1969 1970 1971
t---
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
IL CANYON RESERVOIR ELEVATION
1964 1965 1966
WATER YEAR
1967
-1----+--
1968
,
-I-
1975 1976 1977 1978 1979 1980 1981
lEEK PRE-AND POST-PROJECT FLOW
NYON SIMULATED RESERVOIR OPERATION FIGURE E.2.194
LEGEND:
PRE-PROJECT
- - -WATANA!DEVIL CANYON OPERATION
lYffi':£J ELEVATION CHANGE
EXTRAPOLATED
/
1/
/
:;.
.
.
:
.
.../CHANr EL BOTTOM
f/
°
746
756
748
754
SEPJULAUG
MINIMUM FLOWS
JUNMAYSEPAUGJUL
MEAN FLOWS
JUNMAY
FIGURE E.2.195
10,000 20,000 30,000
LRX 57 RATING CURVE(2)
GOLD CREEK DISCHARGE (CFS)
WATANA/OEVIL CANYON OPERATION;MONTHLY AVERAGE
WATER SURFACE ELEVATIONS AT RIVER MILE 142.3
SEP
746
756
748
754
752 i~fflf~~~~¥iH~f:r I~::l:j~~J~JJi nttM:~::lli 752
~/::::;'~~,'t-
o }t~~1"r ,:;~,~:~t t:r~(:{~;M:[~~~g'~~:;t~-:-~-tt:;~~.':tfflltr :::;)~j~~~f-f-1~;;{w 'af~~~~::::Nt~{IT o:i~Ul;w
.'~~~'"::':'~~x-~~:WW':1.fi-d'~,.Wr.;:*d lL.lL.i'~Fl !.nfsfi ~-z ;::~.~4~:;:;~:z
0 '+t;4:~'i~titr&l :::.:.:.:.;.:.:.:.:~.::::0
t=750 nill1Tfi .;.:~~:~:.:.i=750
<t ...._;:W-W"""<t>>w '~gf~~w
-!-!W W
MAY JUN JUL AUG
MAXIMUM FLOWS
NOTES:
I.WATER SURFACE ELEVATION ABOVE
RATING CURVE
2.RATING CURVE BASED ON GOLD
CREEK DISCHARGE AND OBSERVED
1982 WATER LEVELS (ADF 8 G 1982)
/
/
/
/
/.
,,
,,
:CHANNEL BOTTOM AT
EL 605.5
.
o tO,ooo 20,000 30,000
LRX 35 RATING CURV~2)
GOLD CREEK DISCHARG E (CFS)
SEPJUNJULAUG
MINIMUM FLOWS
MAYSEPJUNJULAUG
MEAN FLOWS
MAY
WATANAIDEVIL CANYON OPERATION:MONTHLY AVERAGE
WATER SURFACE ELEVATIONS AT RIVER MILE 130.9
SEP
620 ~Hb-Ltilui:!jt::lkl:Fif]I I kmmt'L---I I -l 620
612 ~I I I I I I I I I I I I I I I I -t 612
[f::.~:F]ELEVATION CHANGE
EXTRAPOLATED
622 I ,_-.~~.'..~:.~.'",~,~.',~,n :;I Iii iii Iii iii 622
614 l-I I I I I I I I I I I l:¢lt~'V1H I I I -;614
618 r~l"·lfl I i.jJfrfl :;~~g1 .,l 61£f~.t;1E:::-~g8i·.:~:<I.-~'t"l.::-.~~
'.•.•.
f:~ttif1t *-~:t>"•.•-~"m.us I-j!f;ifmtfi <ijk·.w I I
I,-<i-.:':':W
W ;t.;;-:.~$w
u..;:::-::::H::;~'t-i:.~'~u..
~
z I r~l rl z0~.:...~~:0-616 616I-~<I>>w w
..J ..J
W W
MAY JUN JUL AUG
MAXIMUM FLOWS
NOTES:
I.WATER SURFACE ELEVATION ABOVE
RATING CURVE
2.RATING CURVE BASED ON GOLD
CREEK DISCHARGE AND OBSERVED
1982 WATER LEVELS(ADFElG 1981).
FIGURE E.2.196
554 q:iWli .~.~~~~-./:~illl:554
~
l-I-
ILl ILl
ILl ILlu..u..
~~
z z
0 0
!;t 552 ~552>>W ILl
..J ..J
W ILl
10,000 20POO 30,000
LRX 28 RATING CURV~2)
GOLD CREEK DISCHARGE (CFS)
/
/
/v
.I
:
:
:
~CHiNNEL Bor'l"
558
556
550
548
oSEPJUNJULAUG
MINIMUM FLOWS
MAYSEPJUNJULAUG
MEAN FLOWS
ItfnlfJ ELEVATION CHANGE
EXTRAPOLATED
MAYSEPJUNJULAUG
MAXIMUM FLOWS
MAY
556 1;;,,,,,,,,,,,,,,,,11
550
558 f i·.·...~·\:,'L:\'.~'..~..!i.·~.·..:::·......:.?~.I
548 I I I I I
NOTES:
I.WATER SURFACE ELEVATION ABOVE
RATING CURVE.
2.RATING CURVE BASED ON GOLD
CREEK DISCHARGE AND OBSERVED
1982 WATER LEVELS (ADF aG 1982).
WATAf\JAlDEVIL CANYON OPERATION:MONTHLY AVERAGE
WATER SURFACE ELEVATIONS AT RIVER MILE 124.4
FIGURE E.2.197
5
o L...-_....L...-_
o
40 1-----+--::::;;;
180 r----r---
140 I---+__-
160 I---+__-
~120 1---'-----
U INFLOW:
o OUTFLC
:100 1~80 I---+__-
<t:ru
(f)60 I---+--o
20 I-t------->d---
35
POWERHOUSE AND
.SERVICE SPILLWAY -+---+-----1
OPERATING
POWERHOUSE
5 10 15 20 25 30
TIME (DAYS)
PROBABLE MAXIMUM FLOOD
EMERGENCY
SPILLWAY
OPENI---'Ne-::-G__-+-_-+-_---+
--j;OWERHOUSE
CLOSED..-t -------+-----1
OUTFLOW
MATCHING
I--_--+-~-+-_~INFLOW ,--_-+-_--+__1
oo
80
40
w
~
tr 160«
::I:u
~120o
~240 I--------+---~f_____-_+_-___+-~<+_-__+-___+
u
o
g 200 I------.:-f--~-+__J----L.-----+_-_+-__l
280 I----+-----!l+---+_
RESERVOIR
INFLOW/
320 1----+-------f-1H--,;~__+____'~___+-OUT FLOW
5
1450 L...-_...I.-_
o
1460_---
i=
!:=.1458 I----+_-zo
~g 14561---+__-
W
...J
W
~14541--+----o>0::
~1452 I-----t--
Wa::
35510 15 20 25 30
TIME (DAYS)
PROBABLE MAXI MUM FLOOD
I
I
RESERVOIR
ELEVATION
MAX WSEL ~EMERGENCY:1465.3~SPILLWAY
OPERATING
J /1\~-----
\POWER HOU;E \!
OPERATING 1\---_.-------------_.e-------r ._..-+-_..-
I ~
I
.
!
I
1
i
joo
1400
1410
1480
1460
1470
i=u..
-1450zo
~g 1440w...J
W
~1430·0>
0::
W
~1420
0::
DE'v
FLOOD DISCHA
SURFAC
30510152025
TIME (DAYS)
RESERVOIR ROUTING
1:50 YEAR FLOOD
(SUMMER)
I I
POWERHOUSE AN D
V OUTLET FACILITIES
/OPERATING
I'
'f\
"-MAX.WSEL=1455
I I
I/INFLOW=OUTFLOW
V N I-....
L/~POWERHOUSE AND OUTLET
FACILITIES OPERATING
1460
o o
w
~20
<{:cu
~10o
50
~40
u
og 30
.....u.-1458z
Q
I-:
:;1456
w
...J
W
!?::1454
~
0::
~1452
w
0::
5
r"'\.
I ,,
~
DW N 1\
/\..-..
r\
V
~1"0-
/
~~MAIN SPILLWAY
OPERATING
--
WERHOUSE AND OUTLET
'GIUTI ES OPERATING
I I I I
10 /5 20 25 30 3
TIME (DAYS)
RESERVOIR ROUTING
1:10,000 YEAR FLOOD
~f---.
POWERHOUSE OUTLETifFACILITIESANDMAINSPILLWAY~OPERATING -
I J
•I I
~MAX WSEL=1455-
J450 o 5 10 15 20 25
TIME (DAYS)
RESERVOI R ROUTING
/:50 YEAR FLOOD
(SUMMER)
30
10 15 20 25
TIME (DAYS)
RESERVOIR ROUTI NG
I:10,000 YEAR FLOOD
30 35
IL CANYON
RGES AND RESERVOIR
E ELEVATION S FIGURE E.2.198
~-------=-A
1 )")l J )1 ]1 1 I J J
~~
V ",,"
"""
......2010
./
V ./
//
~/
/
(/
/./
./
_J____/
-,"
-----
100
90
80
70
60
50
(f)
lI..
U 400
0
Q-w 30
(9
0::
<:I
I
U
(f)
0 20
10
1.02
NOTES,
I.BASED ON WEEKLY RESERVOIR
SIMULATIONS FOR 2002 AND
2010 DEMAND.
1.11 125 2 5 10
RECURRENCE INTERVAL (YEARS)
20 50 100
GOLD CREEK ANNUAL FLOOD FREQUENCY CURVES
WATANA/DEVIL CANYON OPERATION
FIGURE E.2.199
I I 'I I I II I I II I I 'I ,I 'I I r
~LEGEND:
GOLD CREEK PRE -PROJECT FLOW
••••••••..DEVIL CANYON OUTFLOW
r---
- - -GOLD CREEK POST-PROJECT FLOW
~
--~
---
--
I--~
~
~
--~
..
,J\r \
\
~f\'\~~'--.,,.....
~-~.--~-------.:-.--. .....
0-........-......-.....---.------".............-..._~...--."-':1
~....
.--
I I I I dII I I I I II I II I I I
88
72
64
56
en
~u
o 48o
Q
ILl
(!)
a::«
~40en
a
32
24
16
8
o
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1964 DEVIL CANYO
SIMULATION
---..._~----.,...-........--,.,.-.,..
IE JULY AUGUSTIMONTH
~N AND GOLD CREEK FLOW
IUSING 2002 DEMAND
SEPTEMBER OCTOBER NOVEMBER DECEMBER
FIGURE E .2.200
88 ---..,...-....,....-------......,,......-or---..,..--........--r----r--..,....----,r---r---~-_r_-_r
80
LEGEND:
---GOLD CREEK PRE-PROJECT FLOW
••••• ••..DEVIL CANYON OUTFLOW
--- -GOLD CREEK POST-PROJ ECT FLOW
72 1-------------'---------------------------------
641--------------------------------------
56
(i)
I.L
(J
8 48
0
I.LI
(!)
0:«::r 400
(/)
0
321--------------------------------------t-~-
24 I------------------------------------f----'-------It----
16 1------------------------------+-\-1--------
-------~-~--~-......---~-...8 I---.------------=...::....:.==-=-=----__--=====-----------Ir---\:-:,.,.L----=-::c=-~.............:_••-...
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1967 DEVIL CANYO
SIMULATION 1
------.-----.-.-.----------_-----.1
I TT 1 I I I I I I I I I , I I I T T T I I J I T T
-
-
-
I
I
-
-
r\
r
....-
:
I ~-
,~
~u ~l i~I L ....'~_ r f-'"·····1 -
•I
-_."''''4/i ........
J
W I \/_.\JI
I ~l -I
I
I
I 'tI
I
~1 ·...0 -I I "-''t I
I '"J :~-----~------~----.---..--~.......;.J
'\".-..--J._~__•
-'--f..........'J••••••l ~!"•••••••••••••......................
i
-
I I I I I I I I I I I I I I I I
I I I I I I I I I
JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
MONTH
N AND GOLD CREEK FLOW
USING 2002 DEMAND
FIGURE E.2.201
88 -------......-......------.,....--_--......-_-......,.r-----,r----r---"T"""'I'-~-
80
LEGEND:
---GOLD CREEK PRE-PROJECT FLOW
...•••••..DEVIL CANYON OUTFLOW
- - -GOLD CREEK POST-PROJECT FLOW
721--------------------------------------
641-------------------------------------
56
(/)
IL.
U
0 48
0
Q
w
(!)
a:«40z
0
(/)
0
32
241-------------------------------------
16 I------------------------------f--+--+-~::_+__...___t__E_
---_.....-----....._~-....-.....-...._----8 ----....----
FEBRUARY MARCH APRIL MAY
-
JUNI
NOTE-_
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1970 DEVIL CANYC
SIMULATION L
DECEMBERNOVEMBEROCTOBER
• . ,p=.-J
\_~.-:=.-d
SEPTEMBERAUGUST
"","-~--,,--r .r•••••••••••
r
MONTH
JULY
.................................:
)N AND GOLD CREEK FLOW
JSING 2002 DEMAND
FIGURE E.2 .202
88 I I II I I II I I II I I 'I I I l(I I
-LEGEND:
GOLD CREEK PRE -PROJECT FLOW.........DEVIL CANYON OUTFLOW80----GOLD CREEK POST-PROJECT FLOW
-
72
I--~
64
r-
56
I--
en
I.L.u
o 48
0 ~Q
w I--
(.!)
0::«z 40<.>
(/)
0
I--
32 ~---------------------------------I-------
24 t------------------------------------t-----
t'\
16 t----------------------------------f--F--.,--\--"-
I \
r \
I '--J-----.,',."-------\,.'
\,.'.,'",L I •00,
8 t-------------'----------------~~=;:::__--------....l,..t....-.~.........I_'---:".:...----------,_-J''r "-----.....
-
o L::=JI==IC=IIC::::::II==CI=::tII::::~t::=:t::=:dI=::::t:=::::!==:]IC:=CI=JI~_LlII_---lI_--l..1
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1964 DEV IL CANYO
SIMULATION
~'-""\"'.....I
•••• e •••••
~,
,\
I·..\'"~\".--.,~i .V."•••••~••'I •
~..,-'-"'~''''''-~-'t . . . . . . .,".-.-~---.....-...--.........r--····
I
MONTH
,N AND GOLD CREEK FLOW
[USING 2010 DEMAND
FIGUR E E.2.203
I I I I I I I I I JI I I 'I I I I I I I
LEGEND I-,
GOLD CREEK PRE-PROJECT FLOW
••••••••DEVIL CANYON OUTFLOW-
- - -GOLD CREEK POST-PROJECT FLOW
-
-
f-
I--
-
~-
~
I--~~~
f\
I--
V
fr---/\
-~--------,"'\,'''oJ''''''''1'\1 '-"'__If L __________""\-~~.....,
~........~.................................~I....
~
I ~,
ll-
I II I I I I I I II I I I I
88
80
64
56
(i)
u..
lJ
8 48
0
~
t!)
0::«40:r
0
~
c
32
24
16
8
o
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE:
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1967 DEVIL CANYON
SIMULATION US
I I I I , I
I I I I I I I I I I ,I I I 1 I I r I
-
-
-
-
-
-
~-
\J
J\1 ~1i····.~-
I t
~!
W \J "f !~~,I ::....-r......
J
I ,J
,.J"........;~!....~...,--.....;--~---.......,,-~--~t •r-
i"l r···..·······I1\'\J ....,-\• ••••::\-~=l II""•......
i ...._-....J.J :~-:_............"--'................
-
I I I I I I I I I I I I I I I I I I I I I I I I I
MONTH
JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
AND GOLD CREEK FLOW
ilNG 2010 DEMAND
FIGURE E.2.204
88 ....----1....--......1-......11-......-'-'...----r-......r-......-r-I........--I"""Tr--r\-"TT"II-I,...---"""Tr--rll-r---....'-r-Ir
......LEGEND:
GOLD CREEK PRE-PROJECT FLOW
•••••••••DEVIL CANYON OUTFLOW
80 ------GOLD CREEK POST-PROJECT FLOW
f-
72
f-
64
f-
56
-f--
II)
IL.
U
0 48
0
0
~
LaJ f-
(!)a::«
:J:400en
0
f-
32
f-
24
-
16
,'.---
-
I A.\r.I
-
"--"'-1!8 I--...-.__=._=_=_:-:-:_=-=_=-------------------,=;;}----+_:-:-J...,.,....~,,---_-..r~..,.;;::_~J";-....,.~_=_=-_-"1I.J-----------------------_.J J ...
o L=:::::I:=::;:t:::::::jtfl:=t:::=:::::t:==±I==:±::::::::jt:::::ft.1==:r::::=r:=:'~...lIL--lII__L-I_.L'L1-l'_..lI.-j
JANUARY FEBRUARY MARCH APRIL MAY JUNE
NOTE,.
TIME SCALE IS IN INCREMENTS OF 10 DAYS.
1970 DEVI L CANYON
SIMULATION US
DECEMBERNOVEMBEROCTOBER
-~""'-:::::.":":'~:::.~::-.~.~.~;::.-::.
SEPTEMBERAUGUSTJULY
MONTH
.•••••••••••••••••••••••••••J
AND GOLD CREEK FLOW
ING 2010 DEMAND
FIGURE E.2.205
I
.........-
"'........."....-
,
"'-......--',--
j
10
2
0 10 20 30 •
%OF TIME DISCHAI
105
8
6
10
2
0 10 20 30 ~
%OF TIME DISCHAI
10
2
0 10 20 30 ~
%OF TIME DISCHAI
105
8
6
4
2
10 4
8
Ul 6...u
4
1&.1
C)a:«2zu
Ula 10 3
8
6
4
2
4
2
10 4
8
Cfl 6lo-
U
4
1&.1
C)a:«2zu
Cfla
10 3
8
6
4
2
10 5
8
6
4
2
10 4
8
Cfl 6...u
4
1&.1
C)a:«2zu
Cfla 10 3
8
6
4
2
....-- -
~r-..
F~BR~A~Y
~"--t---.....
------
dUllY
f---r------
I-r----r---r-
D~CEIMBfR
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
2
4
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
1&.1
C)a:
:i 2u
Ula
10 3
8
6
10 5
8
6
4
2
10 4
Cfl 8...6u
41&.1
C)a:«2zu
Cfla
10 3
8
6
4
2
4
2
10 4
Cfl 8...6u
4
LJJ
C)a:«2zuCfla
10 3
8
6
4
2
Ul...u
I'r--_----.....
............
---..-..r-~
JUINE
~----1----
...........r---r---
J~NUA~Y
------
........-.....-.....-t----1--......
I
1N~VE~BfR
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 2 o 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
105
8
6
10 5
8
6
4
2
104
Cfl 8...6u
41&.1
C)a:«2zu
Cfla
103
8
6
4
2
4
2
_10 4
Cfl 8...62
4
1&.1
C)a:«2zu
Cfla
10 3
8
6
4
2
10 5
8
6
4
2
10 4
Cfl 8...62
41&.1
C)a:«2zu
Cfl
-a
10 3
8
6
4
2
IO!!IO!!.
8 8
6 6
4 4
2 2 --I-.
104 10 4-lii 8 -~8
(/)...6 ...6 ~to)to)---.-4 -4auI&J \Cl f------..~II:ic(2 f--.c(2J:J:to)~to)
Ul (/)
15
10 3 15 10 3
8 8
6 6
4 4
2 2
~A~CHI
10 2
AP~IL
10 2
M~Y
~O 50 60 70 80 90 100 0 10 20 30 40 !!O 60 70 80 90 100 0 10 20 30 40 !SO 60 70 80 90 100
RGE EQUALLED .OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
10!!10!!
8 8
6 6
4 4
2 2--........~t-r-...10 4 -104 ro----~8 ~8Ul........Ul I-.-...6 ...6to)~-1'"-_-~-i"",au 4 4 -""'-au
Cl Cl ........II:II:~2 c(2J:
to)to)
Ul ,(/)
15
10 3 15
10 3
8 8
6 6
4 4
2 2
,UGIUST
10 2
SE1PT ~"~ER
10 2
°ICTI)B~R
W5060708090 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
RGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIM£DISCHARGE EQUALLED OR EXCEEDED
NOTE:i...E.JEND:
I.CURVES BASED UPON AVERAGE MONTHLY PRE-PROJECT FLOWS
FLOWS FOR 32 YEARS OF SYNTHESIZED ----WATANA /DEVIL CANYON FLOWS
RECORDS DERIVED FROM HISTORICAL AND-FILLED DATA....
\....
\....
\.
"i'."--MONTHLY AND ANNUAL
"-FLOW DURATION CURVES
SUSITNA RIVER AT WATANA
~N~UA~
10 50 60 70 80 90 100
RGE EQUALLED OR EXCEEDED FIGURE E.2.206
r---.............-.........
10
2
0 10 20 30
%OF TIME DISCHt
10 5
8
6
4
2
10 4
8
IJl 6IL-
U
4ILl
Cl
II::«2:I:
U
IJl
0
10 3
8
6
4
2
~r--
F~BR~A~Y
10 2 o 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
2
IJl
IL-
U
ILl 4
Cl
II::
~2u
IJl
15
10 3
8
6
4
f-+-----------
""""-.I-r--r----
J~N~ARIY
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
IJl 8
IL-6u
4ILl
Cl
II::«2:I:
U
IJl
0
103
8
6
4
2
\
"-......
\...."-....
..........-................-'......----
10
2
0 10 20 30
%OF TIME DISCH,
10
2
0 10 20 30
%OF TIME DISCH~
10 5
8
6
4
2
10 4
8
IJl 6IL-
U
4
ILl
Cl
II::«2:I:
~
0 10 3
8
6
4
2
10 5
8
6
4
2
10 4
8
IJl 6IL-
U
4
l1J
Cl
II::«2:I:
U
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15
10 3
8
6
4
2
1------...--f-_
r"-.............r----.....
D~CEIMBfR
.....r----j'.....
--.-
dUllY
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TI'l'E DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
IJl 8
IL-6u
4ILl
(!)
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8
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4
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10 4
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IL-6u
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10 3
8
6
4
2
f---f--ro-~
-.......-'--..........r-................
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.......~--r-................
I
r-....-
-~
I
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10
2
0 10 20 30 40 50 60 70 80 90 100
%·OF TI ME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
2
10 5
8
6
4
2
10 4
IJl 8
IL-62
ILl 4
(!)a::«2:I:
U
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10 3
8
6
4
2
ILl
Cl
II::
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(/)
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10 3
8
6
4
...................---
,.
\
M~Y
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
8
Ul 6IL.
U
4
I&J
l.!la:
<I:2:I:
U
Ul
15 10 3
8
6
4
2
-
"-'r-.r-r--
AP~IL
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED O'R EXCEEDED
10 5
8
6
4
2
10 4
8
Ul 6IL.
U
4w
l.!la:
<I:2:I:
U
Ul
15
10 3
8
6
4
2
IMA~CHI
40 50 60 70 80 90 100
IRGE EQUALLED OR EXC EEDED
-----......
--.......
°ICT?B~R2
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
8Ul
IL.6
~
4w
l.!la:
<I:2:I:
U
Ul
15
10 3
8
6
4
2
.........r-.-.........r--
"
SEIPT~M~ER
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
10 4
Ul 8
IL.6u
w 4
l.!la:
<I:2:I:
U
Ul
15
10 3
8
6
4
2
40 50 60 70 80 90 100
IRGE EQUALLED OR EXCEEDED
-r-------
,UGIUST
MONTHLY AND ANNUAL
FLOW DURATION CURVES
SUSITNA RIVER AT DEVIL CANYON
"'."
'\
"'-r---.....
~N~UA~
NOTE;
I.CURVES BASED UPON AVERAGE MONTHLY
FLOWS FOR 32 YEARS OF SYNTHESIZED
RECORDS DERIVED FROM HISTORICAL AND
FILLED DATA.
LEGEND:
PRE-PROJECT FLOWS
- - ---WATANA I DEVIL CANYON FLOWS
40 50 60 70 80 90 100
~RGE EQUALLED OR EXCEEDED FIGURE E.2.207
..----
""'-'--
~A~
10
2
0 10 20 30 40 51
%OF TIME DISCHARGE!
10 5
8
6
4
2
10 4
8
Ul 6...
(,)
4....
C)
It:
~2
(,)
Ul
0
103
8
6
4
2
-----1---
.......'---
F~BR~A~Y
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
2
Ul...
(,)
....
~
~2
(,)
Ulo
10 3
8
6
4
~-------
r-...
'--r-
J~N~A~Y
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
2
104
'in 8...6(,)
4....
C)
It:<[2:I:
(,)
Ul
0
103
8
6
4
2
I\.
r---.....
'r--."'-..r\.
"
'N~I
I'....--r-,
.......I-----
'UGI'
10
2
0 10 20 30 40 5(
%OF TIME DISCHARGE E
10
2
0 10 20 30 40 5(
%OF TIME DISCHARGE E
10 5
8
6
4
2
10 4
8
Ul 6...
(,)
4....
C)
It:
<[2:I:
(,)
Ul
0 10 3
8
6
4
2
10 5
8
6
4
2
10 4
8
Ul 6...
(,)
4....
~
<[2:I:
(,)
Ul
0
10 3
8
6
4
2
-.--I----1---
........10-.---..r---r-...........
D~CEIMBfR
---..---""'\--
dUllY
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5
8
6
4
10 5
8
6
4
2
10 4
Ul 8...6(,)
....4
C)
It:
<[2:I:
~
0
103
8
6
4
2
2
10 4
Ul 8...6.(,)
4....
C)
It:
<[2:I:
(,)
Ul
is
10 3
8
6
4
2
..........
"""-.....
I---I--
r---"1---
JU1NE
r-1----
.........,...
-:--r---I'--.~
N~VE~BfR
10
2
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
2
10
2
0 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
,10 5
8
6
4
10 5
8
6
4
2
104
~8...6~
4....
C)
It:
<[2:I:
(,)
Ul
0
10 3
8
6
4
2
....
C)
It:
~2
~o
103
8
6
4
10 5 10 5
8 8
6 6
4 4
2 2 i'o...
l"--t--r-.......
104 I----10 4 l-i----~8 ~8
(/)
6
(/)
I&.I&.6 1\U U \.~4 ~4........<!l fi!a::
21'--..<C(<C(2:I:-t--:I:
lil r-ut--t--(/)Ia
10 3 r---+--a 10 3
8 8
6 6
4 4
2 2
tCH
I
APRIL M~Y
10 2 1 10 2
()60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 \0 20 30 40 50 60 70 80 90 100
EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 5 10 5
8 8
6 6
4 4
2 ~2
:J '.r-.r-
1'....t--'-----,...--10 4 10 4-~8 ~8(/)(/)--I&.6 I&.6u~.~r--4 4....................<!l <!la::a::
<C(2 <C(2:I::I:U U
(/)(/)a
10 3 a
10 3
8 8
6 6
4 4
2 2 1
UST
10 2 SErr~M~ER
10 2 °ICT?B~R
o 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
~QUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
NOTE:LEGEND:
I.CURVES BASED UPON AVERAGE MONTHLY PRE-PROJECT FLOWS
FLOWS FOR 32 YEARS OF SYNTHESIZED ----WATANA I DEVIL CANYON FLOWS-RECORDS DERIVED FROM HISTORICAL DATA.
.....
"'\
.........I'--.1'..MONTHLY AND ANNUAL
FLOW DURATION CURVES
SUSITNA RIVER AT GOLD CREEK
UA~
)60 70 80 90 100
~UALLED OR EXCEEDED FIGURE E.2.208
I'llo..........
.~
---.
-~
1
3
10 0 10 20 ,
%OF TIME DIS
3
10 0 10 20 ~
%OF TIME DIS
3
10.0 10 20 :
%OF TIME DIS
10 6
8
6
4
2
10 5
8Ul6I&-
U
4
LLI
(!)
ll::«2:I:
Urn
0 10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
UJ 6II..
U
4LLI
(!)
ll::
<[2:I:
~
15
10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
Ul 6I&-
U
4
LLI
(!)
II::«2:I:
U
UJ
15
10 4
8
6
4
2
.....-..r---r---1-----
I--..
r---~
D~CE~B~R
-1---~---
JU1LY
~~----
-.....
-I"--...
F~BR~A~Y
2
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
2
3'
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
10 5
rn 8
I&-6u
4LLI
(!)
II::
~2u
UJ
0
10 4
8
6
4
2
4LLI
(!)
II::
~2u
UJ
15 104
8
6
4
4
2
10 5
UJ 8
II..6,U
4
LLI
(!)
II::«2:I:
Urn
0
10 4
8
6
4
2
I--:-r--,------
-......
I
N~VE~BfR
----.;.-........-.
JU1NE
- --I--~-.I-
-----.............
J~NUA~Y
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
3
10 0 10 20 30 40 50 60 70 80 90 100
%·OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
~105
rn 8I&-60
4
1&1
(!)
II::«2:I:
~
0
10 4
8
6
4
2
2
10 5
UJ 8
I&-6~
41&1
(!)
II::
<[2:I:
0rn
0
10 4
8
6
4
2
10 6
8
6
4
2
105
UJ 8
I&-6u
4
1&1
(!)
II::
<[2:I:
U
UJ
0
10 4
8
6
4
2
--....r-...---~----"""-.-~~
..~y
---..~l-I---I---r-I-
I °ICT?B~R
10 3
o 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
2
105
8Ul6u.u
4
UJ
Cla:
c(2:I:
U
Ul
15 10 4
8
6
4
2
4
2
10 5
8Ul...6
~
4UJ
Cla:
c(2:I:
U
Ul
is
10 4
8
6
4
2
r-----'--............
AP~IL
I
-.-10..-..~-:-t----1---~"'"---...
I
SEIPT~"~ER
10 3
o 10 20 30 40 50 60 70 80 90·100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
4
2
10 5
Ul 8...6u
UJ 4
Cla:
c(2:I:
U
Ul
is
10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
Ul 6...
u
4
UJ
Cla:
c(2:I:
U
Ul
15
10 4
8
6
4
2---
IMA~CHI
--ro-..
~
,UG,UST
,0 40 50 60 70 80 90 100
:HARGE EQUALLED OR EXCEEDED
10 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED
MONTHLY AND ANNUAL
FLOW DURATION CURVES
SUSITNA RIVER AT SUNSHINE
,
-
"1\1"-,'"-
'"i"'..
"'i'--..
~N~UA~
NOTES
I.CURVES BASED UPON AVERAGE MONTHLY
FLOWS FOR 32 YEARS OF SYNTHESrZED
RECORDS DERIVED FROM HISTORICAL
AND FILLED DATA.
LEGEND
PRE-PROJECT FLOWS
- - -WATANA!DEVIL CANYON FLOWS
o 40 50 60 70 80 90 100
:HARGE EQUALLED OR EXCEEDED FIGURE E.2 .209
~t--..
!"'--.-.
~
r-....
10
3
0 10 20
%OF TIME DI~
3
10 0 10 20 :
%OF TIME DI~
10
3
0 10 20 ~
"10 OF TIME DIS
106
8
6
4
2
10 5
8
(I)6lo-
U
4
lIJ
Cl
II:«2xu
(I)
is 104
8
6
4
2
106"
8
6
4
2
10 5
8
(I)6lo-
U
4
1&1
Cl
II:
:!2u
(I)
is 10 4
8
6
4
2
10 6
8
6
4
2
10 5
8
(I)
610-
~4
1&1
Cl
II:
:!2
~
is
10 4
8
6
4
2
80 90 100
OR EXCEEDED
~--_.-----1-.....-
......
F~BR~AI IY
...
~,-'-----
dUllY
"""..........-,-"--.............~
--.
..........
D~CEIMBfR
10°
8
6
4
10
3
0 10 20 30 40 50 60 70
"10 OF TIME DISCHARGE EQUALLED
10 6
8
6
3
10 0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
(I)
10-
~
1&1
Cl
II:
~2u
(I)
is 10 4
8
6
4
2
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
2
10 6
8
6
4
2
10 5
(I)8
10-6u
41&1
Cl
II:«2xu
(I)
is
10 4
8
6
4
2
4
2
10 5
(I)8
10-6u
4
1&1
ClII:«2xu
Ul
is
104
8
6
4
2
~--r------.........--~r-
"~N~A~Y
......."""'-~-......---
......
dU1NE
-
100...
~~--1'000....--r-""'-r--""--..............
N~VE~B~R
2
2
2
2
2
104
8
6
4
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
106
8
6
4
10
3
0 10 20 30 40 50 60 70 80 90 100
%OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 3 o 10 20 30 40 50 60 70 80 90 100
%.OF TIME DISCHARGE EQUALLED OR EXCEEDED
10 6
8
6
4
10 6
8
6
4
2
10 5
(il 8
10-6u
4
1&1
C!I
II:«2xu
(I)
is
10 4
8
6
4
2
10 6 10 6
8 8
6 6
4 4
2
10 5 10 5
U;8 ~8
6
U)
61L1L ...
U U -~~4 ~4 -l.LI l.LI ~(!)i!0::
<C 2 <C 2J:-J:
U -.U----""--U)-....---U)r--is
104 """----l-is 10 4
8 8
6 -6
4 ......4
2 2
IMA~CHI
10 3
AP~IL
10 3
M~Y
50 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED "to OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
106 106
8 8
6 6
4 4
2 2-105 10 5
~8 ~8U)-U)
1L 6 1L 6u-~~-~.........
l.LI 4 ...l.LI 4 -III....!!..---...(!)(!)
0::0::<C 2 <C 2 -J:J:U U(I)U)
is is
10 4 104
8 8
6 6
4 4
2 2
,UGIUST
10 3
SEIPT~M~ER
10 3
°ICT?B~R
10 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED %OF TIME DISCHARGE EQUALLED OR EXCEEDED
,
NOTES LEGEND
I.CURVES BASED UPON AVERAGE MONTHLY PRE -PROJECT FLOWS
FLOWS FOR 32 YEARS OF SYNTHESIZED ----WATANA/DEVIL CANYON FLOWS
RECORDS DERIVED FROM HISTORICAL
~.AND FILLED DATA.
'"'""-"-
"~......
"'"
1""'.."'-...
MONTHLY AND ANNUAL
~FLOW DURATION CURVESr"'o..
"SUSITNA RIVER AT
SUSITNA STATION.
~N~UA~
~o 40 50 60 70 80 90 100
CHARGE EQUALLED OR EXCEEDED FIGURE E.2..210
100908070605040302010
I~~
\\'",\
\,\~....-
\.
I--_
100 __
I'-__
\'--\-....--"""--~.:::=4\-
\~
\
~
'"'"'"i\
\
\
0.4
o
0.6
0.8
2
20
6
80
60
10
40
w
~cr
<!
:J:
~4
a
ent 8
o
8
-
-
-
-
PERCENT OF TIME DISCHARGE EQUALLED OR EXCEEDED
-LEGEND:NOTE:FLOW DURATION CURVES ARE BASED
PRE -PROJECT ON MEAN WEEKLY DISCHARGE.
WATANA/DEVIL CANYON OPERATION-2002 DEMAND
WATANA/DEVIL CANYON OPERATION-20JO DEMAND
,....
ANNUAL FLOW DURATION CURVE
SUSITNA RIVER AT GOLD CREEK
PRE -PROJECT AND WATANA /DEVI L CANYON OPERATfON
FIGURE E.2.211
38
36
34
32
30
28
26
24
(/)
LL
U
0 220
0
w
Cl
0::20«
:I:u
(/)
Ci
18
16
14
12
10
8
6
4
LEGEND:
----3%I--
_00_25%
50%
----70%
>-----_0-90%
----97%
\,,
\:..:----~~~
\"
00 ........,~.--~1'.--..~~,.-/0 ,
..~~L.......,..,.,'-o I
--0.\./-J I \,'\
I "---.
I
~~J ~~~...----~':-_"-_-:~
I:-..~.,-~::::-::::::-::-:::,....._-----==-.=;.;........
,,{/,
I .I I ..I
2 4
OCT
6 8
NOV
10 12
DEC
14·16
JAN
18 20 22 24
WEEK 01
FEB MAR
NOTE:ASSUMES 2010 ENERGY DEMAND.WATANA /DE
GOLD CREEK [
PROBABILr
A
Ii
I I
J
/,
I
I \
I
ft.1
\II \,
V \
\
\
I \/•..../
i
J
i
/\1
I \
1\1/\.
\II :\
I :!\/\'\.L-..--,_..~..r 1 v·..,-.'-'-,~..--........."\\./'.----'
\~..,~r--/'\~'.1\\..J 1~~5 /'/\.
I~---~.'..\......r----.----"V·/.\\.--/.-.....-'--i-""".""",--:::::::.:-:::::::,-..
~_./_--.../
/
I I I I I I -,I I I I I I
26 28 30 32 34 36 38
WATER YEAR
APR MAY JUN
'IlONTH
IlL CANYON OPERATION
ISCHARGES FOR VARIOUS
IES OF EXCEEDANCE
40 42 44 46 48
JUL AUG
50 52
SEP
FIGURE E.2.212
1350
t=
ILl
ILl
lJ..
z 13000
fi>ILl
..J
W
,..,
1250
r-
I I II
l
~IU_~j
-:::::'.,..:--::'-~
;(r
I
~l--.t
/
'(/
1,,,
rJ
(I
I
I I
I I
I
I
(}J
I
I
LEGEND:
I JUNE 1,198\
---JULY 1,198/
---AUGUST I,1981
f ----SEPTEMBER 1,1981
I I
I
.....
-
.....
1500
1450
1400
1200
1150
1100 o 2 3 45 6 7 8
WATER TEMPERATURE (Oe)
9 10 II
.....
DEVIL CANYON RESERVOIR TEMPERATURE PROFILES
JUNE TO SEPTEMBER
FIGURE E.2.213
I
l I
I IIr'-1 I,
I
I ~l-/
PI .
·I f·
I
I
I
I
I
1
I
I
···
LEGEND:
OCTOBER 1,198\
---NOVEMBER 1,1981
---DECEMBER 1,\981 -
_•••-DECEMBER 31,1981
,"1""\
I
-
-
1500
1450
1400
1350
z
9 1300
~
IJJ
...J
IJJ
1250
1200
1150
1100
o 2 3 4 5 6 7 8
WATER TEMPERATURE (OCl
9 10 "
.-
I
i
-
DEVIL CANYON RESERVOIR TEMPERATURE PROFILES
OCTOBER TO DECEMBER
FIGURE E.2.214
14
12
I 'i',I \i \I \,'',I J,I L \1'l..'J LJ '~u
INFLOW-k.,,'--+-_r---~-~j
,.../-""""";--,r/-\I~\'
-_,!f \r'\I ",,'\:
,.,..,I V " \~"\ "I,,Ir Ii.II 1 .
8
j\n
6
10
W
0::
:J
~
0::
Wa.
:::!:w
f-
uo
4
2
o
10 20 30 9 19
JUNE JULY
NOTES:
I.TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2.BASED ON 1981 DATA.
3.WATANA ASSUMED UPSTREAM.(DYRESM RUN W4010)
4.OUTFLOW TEMPERATURES ARE BASED ON
DYRESM RUNS DC 1020,DC 1021 AND DC 1022.
DEVI L CANYON RESERVOI R I~
JUNE"
~r -
J ,......1\,
V~-A.1\--.'....
'{V .~,,'1'---_v,~'--./-,
\ I
,",
OUTFLOW l -,..-",
/-/i'---.-~~-,
r/-,
I .;"-'I.r ..7 \ I
......
~~\(~
\,
~
,
I I I
-
29
MONTH
8
AUGUST
18 28 7 17
SEPTEMBER
27 7
FLOW AND OUTFLOW TEMPERATURES
'0 SEPTEMBER
FIGURE E.2.215
14
12
10
~
u
0
w K-1-_-
a::----...1-_-::::>
ti:---"""~-a::6w ~'"OUTFLO~a.
:!:\r 1'"..-"w
I-~-....
'"4 ""~
2
0 I
1 7 17 27 6
OCTOBER NO
NOTES:
I)TIME SCALE IS IN INCREMENTS OF 10 DAYS.
2)BASED ON 1981 DATA.
3)WATANA ASSUMED UPSTREAM.(DYRESM RUN W4010)
4)OUTFLOW TEMPERATURES ARE BASED ON
DYRESM RUN OC1022.
DEVIL CANYON RESERVOIR INFL
OCTOBER
,]
1"--.........----------------....._~....1 -.....
'\
\.
,
I I
16
VEMBER
MONTH
26 6 16
DECEMBER
26
OW AND OUTFLOW TEMPERATURES
TO DECEMBER
FIGURE E.2.216
9.0
8.5
--.JUL31--.;:,.:..----.----.
8.0
7.5
u
~
lJJa:::::>
~
~7.0
a.
::!:
lJJ
f-
6.5
6.0
5.5
AUGI5 ------------'-----......-
.------..
5.0
95.00 101.00 107.00 113.00 11900 125.00
RIVER MILE
NOTE;
I.MODEL ASSUMES 1981 METEOROLOGICAL DATA
RECORDED AT WATANA.
2.DEVIL CANYON TEMPERATURE AND DISCHARGE
FROM DYRESM MODEL.(RUNS DCI020 AND DC1021)WATANA /DEVIL
DOWNSTREAM TEMF
AUG 15.---
SEP 15----~.--
SEP 30;/?~
DEVI L CANYON DISCHARGE (CFS):
JUN 15 7920
JUN 305740
J UL 15 6830
JUL 31 6480
AUG 15 9940
AUG 31 24100 (RELEASE)
SEP 15 13750
SEP 30 10600
OCT 15 7450
131.00 137.00 143.00 149.00
CANYON OPERATION
::RATURES -JUN TO OCT
FIGURE E.2.217
6.0 r---...,.....--...,....-----,----,--,..---r--........-----,----,---r---
5.5
125.00
RIVER MIL
119.00
WATANA /DEVIL I
DOWNSTREAM TEMPI
113.00107.00101.00
5.0
4.5
2.5
4.0
2.0
1.5
1.0
0.5 L...-_...J.---_....l..-_----'-_----l._----JL....-_...L...-_....L..._----'-_----L__I....----l.
95.00
u 3.50
w
lr
:::>
!;t
lr
Wa.
:::!:3.0wr-
NOTE:
I.MODEL ASSUMES 1981 METEOROLOGICAL DATA
RECORDED AT WATANA.
2.DEVIL CANYON TEMPERATURE AND DISCHARGE
FROM DYRESM MODEL.(RUN DCI022 )
LE
CANYON OPERATION
ERATURES -OCT TO DEC
DEVIL CANYON DISCHARGE (CFS):
OCT 31 8690
NOV 15 10300
NOV 30 10500
DEC 15 10900
DEC 31 11100
FIGURE E.2.218
4.0
3.5
3.0
2.5
u
o
wa::
::J
~a::2.0
w
Q.
~w
I-
1.5
1.0
0.5
0.0
95.00
NOTE:
101.00 107.00 113.00 119.00 125.00
RIVER MILE
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT DEVIL CANYON.
WATANAI DEVIL CANYON OPERATION DC
OUTFLOW TE~
DEC 15 AND DEC 31
DEVIL CANYON DISCHARGE (CFSl:
OCT 7320
NOV 9440
DEC 11,130
JAN 10,480
131.00 137.00 143.00 149.00
OWNSTREAM TEMPERATURES -OCT TO JAN
vlPERATURE 4°
FIGURE E.2.219
4.0
---APR 30
3.5
3.0
1.0
0.5
------~R~_---
0.0
95.00 101.00 107.00 113.00 119.00 125.01
RIVER MILE
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT DEVIL CANYON.
WATANA/DEVIL CANYON OPERATION
OUTFLOW T
o
........-_........
131.00 137.00 143.00 149.00
DEVIL CANYON DISCHARGE (CFS):
JAN 10,480
FEB 10,090
MAR ·9200
APR 8010
DOWNSTREAM TEMPERATURES -JAN TO APR
'EM PERATURE 4°C
FIGURE E.2.220
4.0
3.5
3.0
2.5
u
0
W
0:::
~
~
0:::20wa..
::!:w
I-
1.5
1.0
0.5
0.0
9500 10LOO 107.00 113.00 119.00 12!:
RIVER M
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT DEVIL CANYON.
WATANA/DEVIL CANYON OPERATION
OUTFLOW TEM
DEVIL CANYON DISCHARGE (CFS):
OCT 7320
NOV 9440
DEC 11,130
JAN 10.480
5.00
tILE
131.00 137.00 143.00 149.00
DOWNSTREAM TEMPERATURES -OCT TO JAN
PERATURES 4 TO 2°C
FIGURE E.2.221
4.0
3.5
3.0
(.)2.5
0
w
Cl::
;:)
~APR 30Cl::2.0wa..
::!:APR ISw
I-
1.5
1.0
0.5
0.0
95.00 101.00 107.00 113.00 119.00 125.00
RIVER MILE
NOTE:
MODEL ASSUMES DAILY BASED LONG TERM
AVERAGE METEOROLOGICAL DATA AND
MEAN MONTHLY FLOWS AT DEVIL CANYON.
WATANA/DEVIL CANYON OPERATION
OUTFLOW TEMI
DEVIL CANYON DISCHARGE (CFS):
JAN 10,480
FEB 10,090
MAR 9200
APR 8010
131.00 137.00 143.00 149.00
DOWNSTREAM TEMPERATURES-JAN TO APR
PERATURE 4 TO 2 0 C
FIGURE E.2.222
FR AZI L -;:...:;~:;;::-;~:-=~
ICE
PHOTO E.2.1 FRAZIL ICE UPSTREAM FROM WATANA
NATURAL
LODGEMENT
POINT
PHOTO E.2.2 ICE COVER DOWNSTREAM FROM WATANA SHOWING
NATURAL LODGEMENT POINT
PHOTOS E.2.5
E.2.6
E.2.7
E.2.8
PHOTO E.2.3 SLOUGH 9 APPROXIMATELY 3500 FEET
UPSTREAM FROM SLOUGH MOUTH,DECEMBER 1982
'-----+--MOUTH
SLOUGH 8A
PHOTO E.2.4 SLOUGH 8A FREEZEUP,DECEMBER 1982
PHOTO E.2.6
PHOTO E.2.7
PHOTO E.2:5'SLOUGH SA NEAR LRX -29 LOOKING UPSTREAM
PHOTO E.2.6 SLOUGH SA
-
FIGURE E.2.8
PHOTO E.2.7 SLOUGH 8A SHOWING FLOODING DURING FREEZEUP
PHOTO E.2.8 ENLARGEMENT OF PHOTO E.2.7 SHOWING
TURBULENT FLOW
APPENDIX E.2.A
RELATIONSHIP BETWEEN MAIN CHANNEL FLOW
AND SLOUGH PHYSICAL HABITAT VARIABLES
Table of Contents
Page
List of Tables ii
List of Figures iii
A.l Introducti on 1
A.2 ·Selection of Sloughs 1
A.3 Definition of Flow Regimes 2
A.4 Main Channel Flow and Physical Habitat 3
Variables of Sloughs
A.5 Summary of Methods of Analyses 5
A.6 Discussion of Resu lts 10
A.7 References 14
-i-
-ii-
-
-
""'"
-
~I
I''''''
-iii -
,-
I""'"
A.I Introduction
Side sloughs of the Susitna River consist of springfed overflow
channels between the.mainstem Susitna and its side channels and the
edge of the floodplain.The side sloughs are generally separated from
the mainstem by well-vegetated gravel bars.Exposed alluvial berms at
the heads of the sloughs normally separate the sloughs from mainstem or
side channel flows.The controll ing berms at the upstream end of the
side sloughs are approximately at the water surface elevations of the
mainstemfor mean monthly flows observed during June,Jtily,and August.
At intermediate and low-flow periods in the mainstem,the side sloughs
convey clear water from small tri butari es and/or upwell i ng groundwater
which is essential to the existence of this habitat type.At
intermediate mainstem flows,the water surface elevation of the Susitna
River causes a backwater to extend well up into the sloughs from their
lower end.Even though substantial backwater often exi sts,the sloughs
function hydraulically very much like small stream systems and there is
a net discharge from the sloughs.At high flows the water surface
elevation of the mainstem river is sufficient to overtop the upper end
of the slough..
Over thirty sloughs have been identified in the reach of the Susitna
River between Devil Canyon and Talkeetna.These slough habitats have
been identified by the Alaska Department of Fish and Game (ADF&G)as
the main producers of chum salmon in this reach of the river.This
reach will be impacted mos t by the regul ated flows from the'proposed
Sus itna Hydroe 1ectri c Project.Numerous add it i onal s laughs have been
identified between Talkeetna and Cook Inlet.
Incremental flow analyses have been prepared for three sloughs in the
reach from Talkeetna to Devil Canyon and for one slough in the reach
from Cook Inlet to Talkeetna.The analyses performed for these four
sloughs consist strictly of hydrologic and hydraulic relationships be-
tween the sloughs and the mainstem of the Susitna ..The analyses des-
cribe the effects of mainstem flow on slough discharge,water surface
elevation,flow depth arid velocity,wetted surface area wetted peri-
meter and water table elevations.These relationships provide the
hydraulic boundary conditions throughout a range of flows in the
Susitna River within which fishery habitats can be defined.
A.2 Selection of Sloughs
The ADF&G and R &M Consultants,Inc.(R&M)began collecting hydraulic
and hydrologic data in the Susitna River ~loughs to describe the rela-
tionships between mainstem flow and slough physical characteristics.
Although hydraulic data is currently being collected as part of the
ongoing studies,data collected primarily in 1981 and 1982 were uti-
lized for this analysis.For the incremental analysis,three sloughs
upstream of Talkeetna and one slough downstream of Talkeetna have been
selected.These sloughs were selected on the basis of location
(representative reach of river),salmon productivity (the three sloughs
upstream from Ta"1 keetna provide spawning habitat for 60 to 80 percent
1
-
of the adult salmon spawning in side sloughs),susceptibility to
mainstem flow (changes in mainstem flow under present conditions affect
the physical characteristics of the slough),and data availability
(detailed-studies have been conducted in these sloughs).The
representative selected sloughs are:
Above Talkeetna:
o Slough 8A (approximate River Mile 126)
o Slough 9 (approximate River Mile 129)
o Slough 21 (approximate River Mile 142)
Below Talkeetna:
o Rabideux Slough (approximate River Mile 84)
Rabideux Slough is located in the upper portion of the Talkeetna to
Cook Inlet reach of the Susitna River and is,therefore,more likely to
be affected by altered flows from the proposed project than are sloughs
located further downstream.
The locations of the sloughs selected for these analyses are shown on
Figure A-I.Maps of each of the sloughs are presented in Figures A-2,
A-3,A~4,and A-5,respectively.
,...,.,
A.3 Definition of Flow Regimes
As the flow in the Susitna mainstem changes,several characteristic
flow regimes are evident in each slough.These regimes are defined as
follows:-
o Regime I -This flow regime is characterized by a slough flow
which is essentially independent of flow in the mainstem
(i.e.,there is no backwater effect into the mouth of the
slough from themainstem).In this flow regime,the slough
acts as a minor tributary to the mainstem.
-
Regime II -This regime is characterized by mainstem back-
water extend i ng into the mouth of the slough because the
mainstem water level acts as a hydraulic control.However,
the discharge from the slough is largely independent of the
mainstem discharge since the upstream berms at the heads of
the sloughs are not overtopped.
o
o
Regime III -At sufficiently high flows in the mainstem,the
upstream berms of the sloughs are overtopped.Under these
conditions,the slough hydrologic and hydraulic characterist-
ics are nearly entirely dependent on the mainstem flows.
A factor which complicates the distinction of these regimes is that in
several cases the sloughs may have two or more channels and associated
upstream berms which overtop at different mainstem flows.Therefore,
2-
CREEK AND SLOUGH
WHISKERS CREEK AND SLOUGH
CANYON
\0
1
21
20
19
MILES
-LEGEND .....
•USGS--
Gaging Station
o
!
'---LANE CREEK AND SLOUGH e
SLOUGH SA
Sunshin.Cr.
SUNSHINE CREEK AND SIDE CHANNEL
u __-WH ITEFISH SLOUGH
-
Figure A·1 Slough Location Map
I i
-
i
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-e 2~w ..a:a:~
-~
'<:'~........
"-"'0
~"""-....."-~~:-....
I-.......~
4...\,.,"()
~s:'-.J ~
<:l ~'-,~I ~
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~
oj ~~~.
..........",
:-.~:~
"'-.~...':.
:;.~.........
'"..
':.~
-]~J 1 1 )1 1 1 -.]1 1 -j -,J 1
SUS I T NA .R I V E R .-
SLOUGH 9
h,
6:J
:J'\
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'>:
('b
-rtl
......5b
ADf ao TRANseCT (lge2.)
Q STATION (Raw TAGLINE)
WATER QUALITY
WEASUREMENT SITE
DATAPOD SITE
STAff GAGE
Raw STAGE RECORDER
SURFACE THERMOGRAPH
-0 1000II
fEET
CAPPROll.lCAL11
t----i"--i
8
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/),.
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<V
froYl-5"d :;
({'l81 )
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'113A """Ii 'h~~
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./
....;...').,r;·i~...·;r·-.:..-;·~.~•.,:~
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~/O(7)q lh'c,~rl7 /14;'
:Y\
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~STAFF GAGE
A RaM STAGE RECORDER
mJ DATAPOD
(!)THERMOGRAPH
..",;;:.;,:.•;=_,!'L'
-t{2,'v p r tl ;/e 14 2.
",'IE R ,..--
....-SlJ S'rliA
I I
MOl,I~
"..;"
~
I
-+:-
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.2-5
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I"""',
subsets of Regime II occur when one or more upstream berms are over-
topped by mainstem flow,but the berm with the highest thalweg
elevation is not overtopped.These intermediate regimes are defined as
Regimes II-A,II-B,etc.
Mainstem discharges which distinguish the hydraulic regimes in the
slough are referred to as threshold discharges.For each of the four
sloughs analyzed,threshold discharge ~stimates are presented in Table
A-I along with the ranges of mains tern flows wh i ch encompass the f1 ow
regimes described above.Determination of these threshold values were
based on computations from available data,field observations,and
aerial photographs.
Descriptions of these distinct flow reqimes are necessary to describe
how mainstem flow and slough physical ~habitat variables are interre-
lated.The relationships within each regime can then be used to
estimate the physical habitat variables '",ithin and beyond the range of
observed values through interpolation and extrapolation for each
regime.The methods and information used to define the relationships
between mainstem flow and physical habitat characteristics in the
sloughs are presented in the Attachment to this Appendix.
A.4 Main Channel Flow and Physical Habitat Variables Of Sloughs
The following slough physical habitat variables were analyzed with
respect to mainstem discharges:
o slough discharge
o water surface elevations at the mouth,near mid-slough,and
near the upstream berms
o water depths at the mouth,near mid-slough,and near all
upstream berms
o average velocities
mid-Slou¥?,and
sloughs.-
at cross-sections at the mouth,
near the upstream berms of
near
the
"...
o total wetted surface area
o wetted perimeters at cross-sections at the mouth,near
mid-slough and near the upstream berms of the sloughs
o water table elevations in the vicinity of the sloughs.
1/Observed lateral velocity distributions and velocity ranges are
provided in the Attachment for selected cross-sections (transects).
! !
Table A-I
THRESHOLD DISCHARGE ESTIMATES
Susitna River Discharge
at Gold Creek
Sus itn a River
Discharge at
Sunshine
-
Slough
8A
(cfs)
Slough Slough
9 21
(cfs)(cfs)
Rabideux
Slough
(cfs)-Discharge at which
mai nstem acts as a
hydrau 1ic control
of slough water-
surface elevation
10 OOoll 11 OOo§.l 21 40G!./<10 OOO~/at mouth (Regime ,,,,
II flow begins)
Discharge at which
intermediate berm 26,00o~/l/N/A§!24,80C/l N/AE.I .~.
is overtopped
(Regime II-A flow
begins)-Discharge at whi ch
30 OOoll 20,50o§.l 2600~1 65 ooo1-Q.Ihighestbermis,,,
overtopped (Regime
32,0Q()±!23 OOoll -!
III flow begins),
N/A -Not applicable
-II flow exists during very low
Regime II assumed to occur for
and 15,000 cfs.
101
§/
II Field estimate.
21 Based on field observations on June 29,1982.
31 IISl oug h Hydrology,Interim Report,1I R&M,Dec.1982,p.2-1.
41 Based on aerial photo.
51 Based upon data in IIpreliminary Assessment of Access
of Spawning Salmon to Side-Slough Habitat above Talkeetna,1I
E.W.Trihey,Nov.1982.
61 Slough 9 and Rabideux Slough rlo not have intermediate berms.!J Based on staff gage data in IIS us itnaHydro Aquatic Studies,
Phase II Base Data Report,Volume 4:Aquatic Habitat and
Instream Flow Studies 1982,Appendix A,Alaska Department of Fish
and Game,1983,11 Table 4-A-3,p.4-A-67.
IIS us itna Hydro Aquatic Studies,Phase II Basic Data Report,Volume
4:Aquatic Habitat and Instream Flow Studies,Part I,ADF&G,
1983,11 Table 41-3-2,p.43.
~I Aerial photos indicate Regime
mainstem flows of 15,000 cfs.
discharges between 10,000 cfs
Based on aerial photos.
3-1
r-
Regime I
Regime II
,'i'tl>1~
Regime I I-A to
"""II-n
Regime III,
TABLE A-I (Cont1d)
REGIME DISCHARGE ESTIMATES
Sus itna River
Susitna River Discharge Discharge at
at Gold Creek Sunshine
Slough Slough Slough Rabideux
8A 9 21 Slough
(cfs)(cfs) (cfs)(cfs)
<10,000 <11,000 <21,400 N/A
10,000-11,000-21,400-10,000-
26,000 20 500Y 24,800 65,000,
26,000-N/A 24,800-'N/A
30 00011 ,,26,000,
>30,000 >23,000 >26,000 >65,000
l!IISlough Hydrology,Interim Report.II R&M,December 1982,P.2-1
Based on aerial photography this flow is estimated to be 32,000
cfs.
Yllpreliminary Assessment of,Access of Spawning Salmon to
,Side-Slough Habitat above Talkeetna,lI E.W.Trihey,November,1982.
Based on data in "Slouth Hydrology,Interim Report",R&M Consul-
tants,December,1982.p.2-1,this flow is 23,000 cfs.
3-2
For the reach from Talkeetna to Devil Canyon,the relationships between
mainstem flows and the slough physical habitat variables were analyzed
for average daily discharges of the Susitna River at Gold Creek (USGS
gage no.15292000)for ice-free conditions.Physical characteristics
of the sloughs are presented for mainstem flows ranging from 1000 cfs
to 31,000 cfs in increments of 2000 cfs and at 12,000 cfs.
Tables A-2,A-3,and A-4 present tabulated results of the effects of
the mainstem discharges on physical habitat variables for Sloughs 8A,
9,and 21,respectively.The methods of analysis and the information
used in preparing the tables are presented in the Attachment,Parts 1,
2,and 3.
For analyzing the effects of mainstem flow on Rabideux Slough,located
downstream from Talkeetna,it was necessary to expand the range of
flows considered.Contributions from the Chulitna and Talkeetna Rivers
constitute approximately 40 and 20 percent,respectively,of the
natural flows in the Susitna River at the Sunshine Gaging Station.
The Chulitna and Talkeetna flow contributions,therefore;reduce the
influence of Susitna River flows measured at Gold Creek on the physical
characteristics of Rabideux Slough.Mainstem flows at Gold Creek of
1000 to 31,000 cfs encompass only the low flow conditions downstream
from Talkeetna as measured at the Sunshine Gaging Station (USGS Gage
No.15292780).In order to account for the wider range and higher
average flows encountered at Rabideux Slough,three flow conditions at
the Sunshine Gage Station were defined based on the Chulitna and
Talkeetna River flows.The incremental flows of the Susitna River at
Go 1d Creek were added to the sum of flows from the Chu 1itna and
Talkeetna Rivers.In this way the majority of pre-and post-project
flow conditions and the effects on Rabideux Slough physical
characteristics could.be analyzed.The three flow conditions used for
the analysis were:
Condition 1:.Sum of the mean daily low flow for the Chulitna and
Talkeetna Rivers during September,typically the lowest
flow month during the ice-free season.The low flow
contribution from each river consists of the 90 percent
exceedance flow.Flows·at Gold Creek were added incre-
mentally to the sum of these flows to defi ne the lower
third of the potential range of flows observed at
Rabideux Slough..
Condition 2:A medium flow range at Rabideux Slough was derived from
the fifty percent exceedance flows in the Chulitna and
Talkeetna Rivers using the mean monthly flow in August.
August fl ows were sel ected because of the salmon mi gra-
tion activity which occurs in August.Gold Creek flows
ranging from 1,000 to 31,000 cfs were incrementally added
to the sum of the mean August month ly flows from the
Chulitna and Talkeetna Rivers to provide a medium flow
range at Rabideux Slough.
4
Sheet 1 of 3
Table A-2
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 8A
Water Surface Elevation Flow Depth
Susitna River Slough Inter-Inter-
Discharge at Di scharge Mid-mediate Upstream Mid-mediate Upstream
Gold Creek at Mouth Mouth Slough Berm Berm Mouth Slough Berm Berm
(cfs)(efs)(ft~msl)(ft~msl)(ft~msl)(ft ~ms 1)(ft)(ft)(ft )(ft)
1~000 3 559.4 568.6 N/A N/A 1.1 0.2 0 0
3~000 3 559.4 568.6 N/A N/A 1.1 0.2 0 0
5~000 3 559.4 568.6 N/A N/A 1.1 0.2 0 0
7~OOO 3 559.4 568.6 N/A N/A 1.1 0.2 0 0
9~000 3 559.4 568.6 N/A N/A 1.1 0.2 0 0
11 ~000 8 561.4 568.8 N/A N/A 3.1 0.4 0 0
12~000 8 561.8 568.8 N/A N/A 3.5 0.4 0 0
13 ~000 8 562.1 568.8 N/A N/A 3.8 0.4 0 0
+>0 15~000 8 562.5 568.8 N/A N/A 4.2 0.4 0 0
I 17 ~000 8 562.8 568.8 N/A N/A 4.5 0.4 0 0I--'
19~000 8 563.0 568.8 N/A N/A 4.7 0.4 0 0
21~000 8 563.2 568.8 N/A N/A 4.9 0.4 0 0
23~000 8 563.3 568.8 N/A N/A 5.1 0.4 0 0
25 ~000 8 563.4 568.8 N/A N/A 5.2 0.4 0 0
27~000 8 563.5 568.8 573.2 N/A 5.3 0.4 0.1 0
29~000 11 563.5 568.8 573.3 N/A 5.4 0.4 0.2 0
31~000 43 563.6 569.8 573.4 N/A 5.5 0.4 0.3 0
N/A -Not Applicable
Note:See Figure A-2 for location of mouth~.mid-slough~intermediate berm,and upstream berm.
See Attachment,Part I,for narrative and worksheets explaining method of determining slough physical
habitat variables..
,I •.J J ,I ',.1 ,'J .1 J "I J J ],..1
C'I ']1 .~-)1 'I )')1 ]-1 1 1
Sheet 2 of 3
Table A-2 (Cont'd)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 8A
Average Velocity Wetted Perimeter
Susitna River Inter-Wetted Inter-
Discharge at Mid-mediate Upstream Surface Mid-mediate Upstream
Gold Creek Mouth Slough Berm Berm Area Mouth Slough Berm Berm'
(cfs)(ft/sec)(ft/sec)(ft/sec)(ft/sec)(ft2)(ft)(ft)(ft )(ft )
1,000 0.06 0.3 N/A N/A 305,000 62 54 0 0
3,000 0.06 0.3 N/A N/A 305,000 62 54 0 0
5,000 0.06 0.3 N/A N/A 305,000 62 54 0 0
7,000 0.06 0.3 N/A N/A 3U5,000 62 54 0 0
9,000 0.06 0.3 N/A N/A 305,000 62 54 0 0
11,UOO 0.03 0.4 N/A N/A 480,000 147 59 0 0
12,000 0.03 0.4 N/A N/A 500,000 152 59 0 0
+::>13,000 0.02 0.4 N/A N/A 520,000 155 59 0 0I
N 15,000 0.02 0.4 N/A N/A 570,000 160 59 0 0
17,000 0.02 0.4 N/A N/A 610,000 163 59 0 0
19,000 0.02 0.4 N/A .N/A 650,000 165 59 0 0
21,000 0.01 0.4 N/A N/A 700,000 166 59 0 0
23,000 0.01 0.4 N/A N/A 740,000 .167 59 0 0
25,000 0.01 0.4 N/A N/A 780,000 167 59 0 0
27,000 0.01 0.4 0.5 N/A 830,000 168 59 7 0
29,000 0.02 0.4 2.5 N/A 870,000 169 59 15 0
31,000 0.07 0.4 7.0 N/A 910,000 170 59 81 0
N/A -Not Applicable
Note:See Figure A-2 for location of mouth,mid-slough,intermediate berm,and upstream berm.
See Attachment,Part 1,for narrative and worksheets explaining method of determining slough physical
habitat variables.
Sheet 3 of 3 -
Table A-2 (Cont'd)~
MAINSTEM DISCl1ARGE VS.PHYS ICAl HABITAT VARIABLES
SLOUGH 8A -,
Water Table Elevation
Sus itna Ri ver Mid-Mid-
Discharge at Slough Slough Upstream
Gold Creek Well A Well B Well
(cfs)(ft,ms1)(ft,ms 1)(ft,msl)-
1,000 565.6 568.0 574.7
3,000 565.6 568.0 574.7
5,000 565.6 568.1 574.8
7,000 565.6 568.2 574.8
9,000 565.6 568.3 574.8
11,000 565.6 568.3 574.9 -12,000 565.6 568.4 574~9
13,000 565.6 568.4 574.9
15,000 565.6 568.5 574.9 -,
17,000 565.6 568.5 575.0
19,000 565.6 568.6 575.0
21,000 565.6 568.6 575.0
23,000 565.6 568.7 575.0 -,
25,000 565.7 568.7 575.0
27,000 565.7 568.8 575.1
29,000 565.7 568.8 575.1 ..
31,000 565.7 568.9 575.2
.-"N/A -Not App 1 icab 1e
Note:See Figure 2 for well locations.
See Attachment,Part 1,for narrative and worksheets
explaining method of determining water table elevations
4-3
'j .~)-1 c ~~'1 1 1 1 I 1 I 1 I ]
Sheet 1 of 3
Table A-3
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 9
Water Surface Elevation Flow Depth
Susitna River Slough
Di scharge at Discharge Mid-Upstream Mid-Upstream
Gold Creek at Mouth Mouth Slough End Mouth 'Slough End
(cfs)(cfs)(ft,msl)(ft,msl) (ft,msl)(ft )(ft )(ft )
1,000 3 589.6 593.3 N/A 0.1 0.9 0
3,000 3 589.6 593.3 N/A 0.1 0.9 0
5,000 3 589.6 593.3 N/A 0.1 0.9 0
7,000 3 589.6 593.3 N/A 0.1 0.9 0
9,000 3 589.6 593.3 N/A 0.1 0.9 0
11,000 3 589.6 593.3 N/A 0.1 0.9 0
12,000 6 589.9 593.3 N/A 0.4 0.9 0
13,000 6 590.1 593.3 N/A 0.6 0.9 0
+:>15,000 6 590.5 593.3 N/A 1.0 0.9 0I
+:>17,000 6 591.0 593.3 N/A 1.5 0.9 0
19~000 6 591.4 593.3 N/A 1.9 0.9 0
21,000 22 591.7 593.4 602.8 2.2 1.0 1.8
23,000 80 592.1 593.9 603.4 2.6 1.5 2.7
25,000 152 592.6 594.3 603.9 3.0 1.9 3.1
27,000 232 592.9 594.5 604.2 3.4 2.1 3.4
29,000 320 593.3 594.8 604.5 3.8 2.4 3.7
.31,000 405 593.7 595.2 604.6 4.2 2.8 3.9
N/A ~Not Applicable
Note:See Figure A-3 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 2,for narrative and worksheets explaining method of determining
slough physical habitat variables.
Sheet 2 of3
Table A-3 (Cont1d)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 9
Average Velocity Wetted Perimeter
Sus itna River Wetted
Discharge at Mid-Upstream Surface Mid-Upstream
Gold Creek Mouth Slough End Area Mouth Slough End
(cfs)(ft/sec)(ftlsec)(ft/sec)(ft2)(ft )(ft)(ft )
1,000 0.8 0.1 N/A 130,000 27 89 0
3,000 0.8 0.1 N/A 130,000 27 89 0
5,000 0.8 0.1 N/A 130,000 27 89 0
7,000 0.8 0.1 N/A 130,000 27 89 0
9,000 0.8 0.1 N/A 130,000 27 89 0
11,000 0.8 0.1 N/A 130,000 27 89 0
12,000 0.8 0.1 N/A 230,000 29 89 0
+:>13,000 0.5 0.1 N/A 300,000 33 89 0
I 15,000 0.2 0.1 N/A 390,000 48 89 0lT1
17,000 0.1 0.1 N/A 470,000 78 89 0
19,000 0.1 0.1 N/A 530,000 145 89 0
21,000 0.1 0.4 0.4 590,000 185 96 50
23,000 0.3 0.8 1.0 640,000 193 117 80
25,000 0.5 1.0 1.4 690,000 193 136 100
27,000 0.6 1.3 1.5 740,000 194 148 150
29,000 0.7 1.4 1.5 780,000 195 150 220
31,000 0.7 1.4 1.5 820,000 195 152 290
N/A -Not Applicable
Note:See Figure A-3 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 2,for narrative and worksheets explaining method of determining
slough physical habitat variables.
,!<J J ..l ~J J J I l ,.~]J
-
Sheet 3 of 3
Table A-3 (Cont'd)
MAINSTEI~DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 9
Water Table Elevation
Susitna River Mid-
Discharge at Slough Upstream Upstream
Gold Creek Well Well A We 11 B
(cfs)(ft,msl)(ft,msl) (ft,msl)
1,000 593.3 599.3 602.9
3,000 593.3 599.5 603.1
5,000 593.5 599.6 603.2
7,000 593.6 599.8 603.3
9,000 593.7 600.0 603.5
11,000 593.8 600.2 603.5
12,000 593.9 600.3 603.6
13,000 594.0 600.4 603.7
15,000 594.1 600.5 603.8
17,000 594.2 600.6 603.9
19,000 594.3 600.8 604.0
21,000 594.5 601.0 604.1
23,000 594.6 601.2 604.3
25,000 594.7 601.5 604.4
27,000 594.9 601.6 604.5
29,000 595.0 601.8 604.6
31,000 595.1 602.0 604.8
N/A -Not Applicable
Note:See Figure A-3 farwell locations.
See Attachment,Part 2,for narrative and worksheets
explaining method of determining water table elevations.
4-6
Sheet 1 of 3
Table A-4
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 21
Water Surface Elevation Flow Depth
.Susitna River Slough·Inter-Inter-
Di scharge.at Discharge Mid-.mediate Highest Mid-mediate Upstream
Gold Creek at Mouth Mouth Slough Berm Berm Mouth Slough Berm Berm
(cfs)(cfs)(ft~msl)(ft~msl)(ft~msl)(ft~msl)(ft )(ft )(ft)(ft)
1~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
3~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
5~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
7~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
9~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
11 ~OOO 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
12~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
.t::o 13,000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
I 15~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0-....J
17~000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
19,000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
21~OOO 5 744.7 744.9 N/A N/A 1.6 0.6 0 0
23,000 9 744.8 745.1 N/A N/A 1.6 0.7 0 0
25,000 9 745.0 745.1 754.6 N/A 1.9 0.7 0.01-/o .
27~000 12 745.3 745.3 754.8 755.5 2.2 0.9 0.2 0.01-/
29,000 19 745.6 745.8 755.1 755.6 2.5 1.4 0.5 0.1
31,000 34 746.0 746.3 755.5 755.6 2.9 2.0 0.9 0.1
N/A -Not Applicable
Note:See Figure A-4 for location of mouth,mid-slough,intermediate berm,and upstream berm.
See Attachment,Part 3,for narrative and worksheets explaining method of determining slough physical
habitat variables.
l./Flow depth is less than 0.05 ft.
I I J ••J >J •,.......1 .1 }J ~I I
1 1 )")')~I "'',J '}1 _..-1 i A
Sheet 2 of 3
Table A-4 (Cont'd}
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
SLOUGH 21
Average Velocity Wetted Perimeter
Susitna River Inter-Wetted Inter-
Di scharge at Mid-mediate Upstream Surface Mid-mediate Upstream
Gold Creek Mouth Slough Berm Berm Area Mouth SlOU 5h Berm Berm
(cfs)(ft/sec) (ft/sec)(ftlsec)(ft!sec)(ft2)(ft)(ft (ft )(ft )
1,000 0.1 0.5 N/A N/A 46,000 50 25 a a
3,000 0.1 0.5 N/A N/A 46,000 50 25 a a
5,000 0.1 0.5 N/A N/A 46,000 50 25 a a
7,000 0.1 0.5 N/A N/A 46,000 50 25 a a
9,000 0.1 0.5 N/A N/A 46,000 50 25 a a
ll,000 0.1 0.5 N/A N/A 46,000 50 25 a a
12,000 0.1 0.5 N/A N/A 46,000 50 25 a a
13,000 0.1 0.5 N/A N/A 46,000 50 25 a a
+::0 15,000 0.1 0.5 N/A N/A 46,000 50 25 a aIco17,000 0.1 0.5 N/A N/A 46,000 50 25 a a
19,000 0.1 0.5 N/A N/A 46,000 50 25 a a
21,000 0.1 0.5 N/A N/A 46,000 50 25 a a
23,000 0.2 0~7 N/A 1/N/A 115,000 98 26 a a
25,000 0.1 0.7 0.0-:-:N/A 155,000 101 26 3 a
27,000 0.1 0.7 1.4 -180,000 103 36 24 4
29,000 0.2 0.7 1.4 -200,000 105 45 44 12
31,000 0.2 0.8 1.0 -220,000 108 55 65 20
N/A -Not Applicable
Note:See Figure A-4 for.location of mouth,mid-slough,intermediate berm,and upstream berm.
See Attachment,Part 3,for narrative and worksheets explaining method of determining slough physical
habitat variables.
l/Velocity is less than 0.05 ft/sec.
!i
Sheet 3 of 3
Table A-4 (Cont'dJ
MAINSTEM DISCHARGE VS~PHYSICAL HABITAT VARIABLES
SLOUGH 21
Water Table Elevation
Susitna River
Discharge at
Gold Creek
(cfs)
1,000
3,000
5,000
7,000
9,000
11,000
12,000
13,000
15,000
17,000
19,000
21,000
23,000
25,000
27,000
29,000
31,000
(ft,ms1)(ft ,ms 1)
1/
(ft,ms 1)
1/No well data available for Slough 21;for a description of
expected water table conditions in Slough 21,see Attachment,
Part 3.
4-9
-,
Condition 3:A high flow range at Rabideux Slough was derived from the
sum of the 10 percent exceedance flows from the Chulitna
and Talkeetna Rivers on a daily basis during the month of
June,which is typically the high flow month of the year.
The range of flows at Gold Creek were added incrementally
to this sum to provide the high range of flows at
Rabideux Slough..
The results of the analyses of the effects of mainstem flow on the
hydraulic characteristics of Rabideux Slough are presented in Table A-5
for the three flow conditions and result in a total range of flows at
Rabideux Slough from 10,000 cfs to 85.000 cfs.Discussion of the
methods used in the analyses for Rabideux Slough are presented in
the Attachment.Part 4.
A.5 Summary of Methods of Analyses
This section contains a summary of the methods used to derive the
following parameters:
a
a
a
a
a
o
a
a
slough discharge
threshold discharges
water surface elevation
fl ow depth
vel oc ity
wetted surface area
wetted perimeter
water table elevation.
Since the methods vary among the sloughs.a separate summary is given
for each.More detailed descriptions are found in the attachment for
Slpughs 8A.9.and 21 and Rabideux Slough.
The slough physical parameters given in Tables A-2 through A-5 should
be considered estimates of the average values.Slough discharge is
.influenced by mainstem water level effects on groundwater upwell-ing.
local runoff.and regional groundwater.For this reason field measure-
ments of the relations between slough discharges and Susitna River
mainstem discharges showed considerable variability i~all Regimes but
especially in Regimes I and II.To simplify the analyses a constant
slough discharge was assumed for each slough for each of Regimes I and
II.
A.5.1 Slough 8A
A map of Slough 8A is shown on Figure A-2.Methods of analyses are
given in the Attachment,Part 1~
Threshold Discharges
The threshold Susitna River discharge for overtopping the upstream berm
(30.000 cfs to 32.000 cfs)was estimated from aerial photography of the
5
Sheet 1 of 16
Table A-5
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
~,
Susitna River C dO 0 11/C dOt O 21/dOt 0 31/on ltlOn -on 1 lOn -Can 1 lOn -
Oi scharge at Mainstem Slough Mainstem Slough Ma i nstem Slough <~Go ld Creek Discharge Discharge Discharge Di scharge Discharge Discharge
Ccfs)Ccfs)Ccfs)(cfs)(cfs)Ccfs)Ccfs)
1,000 10,000 °'31,000 °55,000 0
3,000 12,000 0 33,000 0 57,000 0
5,000 14,000 0 35,000 0 59,000 0
7,000 16,000 0 37,000 0 61,000 0
9,000 18,000 °39,000 0 63,000 0
11,000 20,000 0 41,000 0 65,000 0 -,12,000 21,000 0 42,000 0 66,000 8
13,000 22,000 0 43,000 0 67,000 20
15,000 24,000 °45,000 °69,000 60
17,000 26,000 0 47,000 0 71,000 108
19,000 28,000 °49,000 0 73,000 165
21,000 30,000 °51,000 °75,000 230 ~.
23,000 32,000 °53,000 °77,000 300
25,000 34,000 °55,000 °79,000 380
27,000 36,000 °57,000 °81,000 468 !O!'I>.,
29,000 38,000 °59,000 °83,000 560
31,000 40,000 °61,000 °85,000 660
.!.!See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,narrative and worksheets explaining method of
determining slough physical habitat variables.
5-1
-
..-
I
Sheet 2 of 16
Table A-5 (conit)0
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
Condition 1Y -d't-'2 1/Can 1 lon -Cond it i on 3Y
Susitna River
Discharge at
Gold Creek
(cfs)
-1,000
3,000 .
5,000
7,000
9,000
11,000
12,000
13,000
15,000
17,000
19,000
21,000
23,000
25,000
27,000
29,000
31,000
Mainstem
Discharge
(cfs)
10,000
12,000
14,000
16,000
18,000
20,000
21,000
22,000
24,000
26,000
28,000
30,000
32,000
34,000
36,000
38,000
40,000
Water-
Surface
Elevation
at Mouth
(ft,msl)
255.3
255.5
255.8
256.0
256.3
256.5
256.6
256.8
257.°
257.3
257.5
257.8
258.0
258.3
258.5
258.8
259.°
Mainstem
Discharge
(cfs)
31,000
33,000
35,000
37,000
39,000
41,000
42,000
43,000
45,000
47,000
49,000
51,000
53,000
55,000
57,000
59,000
61,000
Water-
Surface
Elevation
at Mouth
(ft,ms 1)
257.8
258.2
258.4
258.7
258.9
259.1
259.2
259.3
259.5
259.8
260.0-
260.1
260.3
260.5
260.7
260.9
261.°
Mainstem
Discharge
(cfs)
55,000
57,000
59,000
61,000
63,000
65,000
66,000
67,000
69,000
71,000
73,000
75,000
77,000
79,000
81,000
83,000
85,000
Water-
Surface
Elevation
-at Mouth
(ft,ms1)
260.5
260.7
260.9
261.0
261.2
261.4
261.5
261.6
261.7
261.9
262.1
262.3
262.5
262.7
262.8
263.0
263.2
l/See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
-See Attachment,Part 4,for narrative and worksheets explaining method of
,-determining slough physical habitat variables.
,F""'_
5-2
I i
"""',
Sheet 3 of 16
~
Table A-5 (con1t)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
~
Cond it i on 1-1'Cond it i on 21/Cond it i on J~j
Water-Water-Water-*Surface Surface Surface
Sus it na Ri ver Elevation E1ev at ion Elevation
Discharge at Mainstem at Mainstem at 1Vlainstem at ....",
Gold Creek Discharge Mid-Slough Discharge Mid-Slough Discharge r~id-Slough
(cfs)(cfs)(ft ~ms 1)(cfs)(ft ~ms 1)(cfs)(ft~msl)
1~000 10~000 N/A'l:/31 ~000 260.3 55~000 260.6
3~000 12~000 I~/A 33~000 260.3 57~000 260.7 ~f5~OOO 14,000 N/A 35,000 260.3 59~000 260.9
7,000 16~000 N/A 37~000 260.3 61,000 .261.0
9~000 18~000 N/A 39 ~000 260.3 63~00O 261.2
11,000 20~00O N/A 41~000 260.3 65~OOO 261.4
12~000 21~000 N/A 42 ~000 260.3 66~000 261.5
13,000 22~000 N/A .43,000 260.3 67~000 261.6
15~OOO 24~000 N/A 45~000 260.3 69,000 261.7
17 ~000 26~000 260.3 47~000 260.3 71 ~000 261.9
19,000 28~OOO 260.3 49~000 260.3 73~000 262.1
21,000 30,000 260.3 51,000 260.3 75~000 262.3
23~OOO 32~000 260.3 53~000 260.3 77,000 262.6
25,000 34,000 260.3 55~000 260.5 79,000 262.9 lI!J!!I.
27~000 36,000 260.3 57~000 260.7 81,000 263.2
29,000 38~000 260.3 59~OOO 260.9 83,000 263.4
31~000 40,000 260.3 61,000 261.0 85,000 263.7 J""';
y See last page of this table for explanation of conditions.
~/Transect 7 reported as dry at discharge of 25,800 cfs (ADF&G 1982)
Note:See Figure A-5 for location of mouth,mid-slough~and upstream berm.
See Attachment,Part 4~for narrative and worksheets explaining method of
determining slough physical habitat variables~
5-3
....
Sheet 4 of 16
IF'"
Table A-5 (can't)
1-Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-4
I I
11 See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-5
~
,:1
(~
,"'.
Sheet 6 of 16
Table A-5 (con't)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
Condition 11/Condition 2.!/Condition J!'!
Susitna River Flow Depth Flow Depth Flow Depth
Discharge at Mainstem at Mainstem at Mai nstem at
Gold Creek Discharge Mid-slough Discharge Mid-s lough Discharge Mid-slough
(cfs) (cfs)(ft)(cfs)(ft)(cfs)(ft)
1,000 10,000 o ~I 31,000 0.3 55,000 0.5
3,000 12,000 0 33,000 0.3 57,000 0.7
5,000 14,000 0 35,000 0.3 .59,000 0.9
7,000 16,000 0 37,000 0.3 61,000 1.0
9,000 18,000 0 39,000 0.3 63,000 1.2
11,000 20,000 a 41,000 0.3 65,000 104
12,000 21,000 0 42,000 0.3 66,000 1.5
13,000 22,000 0 43,000 0.3 67,000 1.6
15,000 24,000 0 45,000 0.3 69,000 1.7
17,000 26,000 0.3 47,000 0.3 71,000 1.9
19,000 28,000 0.3 49,000 0.3 73,000 2.1
21,000 30,000 0.3 51,000 0.3 75,000 2.3
23,000 32,000 0.3 53,000 0.3 77 ,000 2.6
.25,000 34,000 0.3 55,000 .0.5 79,000 2.9
27,000 36,000 0.3 57,000 0.7 81,000 3.2
29,000 38,000 0.3 59,000 0.9 83,000 3.4
31,000 40,000 0.3 61,000 1.0 85,000 3.7
1/See last page of this table for explanation of conditions.
~/Transect 7 reported as dry for discharge of 25,800 cfs (ADF&G,1982).
Note:See Figure A-5 for location of mouth,niid-:slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-6
I I
Sheet 7 of 16
Table A-5(con 1 t)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
!"""
Condition 1-1/Cond it ion 201/~dOt"31/L.on 1 lOn ~
Flow Depth Flow Depth Flow Depth
Sus itna River at at at
Di scharge at Mainstem Upstream Mainstem Upstream Mainstem Upstream
Gold Creek Discharge Berm Discharge Berm Discharqe Berm
""""(cfs)(cfs)(ft)(cf's)(ft)(cfs)(ft)
1,000 10,000'0 31,000 0 55,000 a .......
3,000 12,000 a 33,000 0 57,000 a
5,000 14,000 a 35,000 0 59,000 0
7,000 16,000 a 37,000 a 61,000 0
9,000 18,000 0 39,000 0 63,000 0
11,000 20,000 0 41,000 a 65,000·a
12,000 21,000 0 42,000 0 66,000 0.3 ·~l
13,000 22,000 0 43,000 0 67,000 0.4
15,000 24,000 0 45,000 0 69,000 0.5
17 ,000 26,000 0 47,000 0 71,000 0.6 """.19,000 28,000 0 49,000 0 73,000 0.6
21,000 30,000 a 51,000 0 75,000 0.7
23,000 32,000 .0 53,000 0 77 ,000 0.7 !~1
25,000 34,000 0 55,000 0 79,000 0.8
27,000 36,000 0 57,000 0 81,000 0.9
29,000 38,000 0 59,000 0 83,000 1.0 -,
31,000 40,000 0 61,000 0 85,000 1.3
11 See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
.-
5-7
F'·
II See last page'of this table for explanation of conditions.
21 Velocity is less than 0.05 ft/sec.
Note:See Figure A-5 fo~location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-8
I I
"""\
Sheet 9 of 16
--
Table A-5 (con1t)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES .....,
RAB IDEUX SLOUGH
Condition 1Y Cond it i on 2Y Cd"31/on ltlon -
Average Average Average
Sus itna Ri ver Ve lac ity Ve 1ocity Ve lac ity
Discharge at Mainstem at Mainstem at Mainstem at
Gold Creek Discharge Mid-Slough Discharge Mid-Slough Discharge Mid-Slough
(cfs)(cfs)(ft/sec)(cfs)(ft/sec)(cfs)(ft/sec)
1,000 10,000 0 31,000 0 55,000 0
3,000 12,000 0 33,000 0 57,000 0
5,000 14,000 0 35,000 0 59,000 0
7,000 16,000 0 37,000 0 61,000 0
9,000 18,000 0 39,000 0 63,000 0
11,000 20,000 0 41,000 0 65,000 0
12,000 21,000 0 42,000 0 66,000 0.3
13,000 22,000 0 43,000 0 67,000 0.5 ,,..,,,
15,000 24,000 0 45,000 0 69,000 0.9
17 ,000 26,000 0 47,000 °71,000 1.1
19,000 28,000 0 49,000 0 73,000 1.3
21,000 30,000 0 51,000 0 75,000 1.3
23,000 32,000 0 53,000 0 77 ,000 1.3
25,000 34,000 0 55,000 0 79,000 1.2
27,000 36,000 ,0 57,000 0 81,000 1.2
29,000 38,000 0 59,000 0 83,000 1.2
31,000 40,000 0 61,000 0 85,000 1.2
1/See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-9
,I"'"
Table A-5 (con1t)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
Sheet 10 of 16
d"11/Cond it ion 2.!!Condition 3.!!Con ltlon -,
Average Average Average
t-Velocity Vel oc ity Ve loci ty
Susitna River at at at
Discharge at Mainstem Upstream Mainstem Upstream Mains tern Upstream
Gold Creek Discharge Berm Discharge Berm Discharge Berm
(cfs),(cfs)(ft/sec)(cfs)(ft/sec)(cfs)(ft/sec)
1,000 10,000 N/A 31,000 N/A 55,000 N/A
3,000 12,000 N/A 33,000 N/A 57,000 N/A
5,000 14,000 N/A 35,000 N/A 59,000 N/A
f~7,000 16,000 N/A 37,000 N/A 61,000 N/A
9,000 18,000 N/A 39,000 N/A 63,000 N/A
11,000 20,000 N/A 41,000 N/A 65,000 N/A
f!"'"12,000 21,000 N/A 42,000 N/A 66,000 1.3
13,000 22,000 N/A 43,000 N/A 67,000 1.4
15,000 24,000 N/A 45,000,N/A 69,000 1.6
17,000 26,000 N/A 47,000 N/A 71,000 1.7
19,000 28,000 N/A 49,000 N/A 73,000 1.7
21,000 30,000 N/A 51,000 N/A 75,000 1.8
23,000 32,000 N/A 53,000 N/A 77 ,000 1.9
25,000 34,000 N/A 55,000 N/A 79,000 1.9
27,000 36,000 N/A 57,000 N/A 81,000 1.8
r 29,000 38,000 N/A 59,000 N/A 83,000 1.6
31,000 40,000 N/A 61,000 N/A 85,000 1.4
N/A -Not Applicable
,...1/See last page of this table for explanation of conuitions.
Note:See Fi gureA-5 for 1ocat ion of mouth,mid-slough,and upstream berm.
,/'"""See Attachment,Part 4,for narrative and worksheets explaini~g method of
determining slough physical habitat variables.
,r-
5-10
1/See last page of this table for explanation of conditions.
Note:See Figure A~5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables.
5-11
.,'-"
1/See 1ast page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determining slough physical habitat variables .
5-12
II
Sheet 13 of 16
;l"'!!"
Table A-5 (can't)
~
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES I
.RABIDEUX SLOUGH
d <<111 dOt'211 Cd'0 3 11Can,tlOn -Can , ,on -.on ,t,on -
Wetted Wetted Wetted
Susitna River Perimeter Perimeter Perimeter
Di scharge at Mai nstem at Mainstem at Mainstem at
Gold Creek Discharge Mi d-S laugh Discharge Mid-Slough Discharge Mid-Slough A
1,000 10,000 rJ-I 31,000 12 55,000 16
3,000 12,000 o?!33,000 12 57,000 22
5,000 14,000 rJj 35,000 12 59,000 24
7,000 16,000 ~I 37,000 12 61,000 25
9,000 18,000 r#39,000 12 63,000 26 -,
11,000 20,000 r#41,000 12 65,000 28
12,000 21,000 ril 42,000 12 66,000 29
13,000 22,000 ri l 43,000 12 67,000 30 ......
15,000 24,000 fil 45,000 12 69,000 30
17,000 26,000 12 47,000 12 71,000 31
19,000 28,000 12 49,000 12 73,000 32
"""21,000 30,000 12 51,000 12 75,000 33
23,000 32,000 12 53,000 12 77 ,000 35
25,000 34,000 12 55,000 16 79,000 210
27,000 36,000 12 57,000 22 81,000 3UO
29,000 38,000 12 59,000 24 83,000 310
31,000 40,000 12 61,000 25 85,000 310
11 See last page of this table for explanation of conditions.
lJ Transect 7 reported as dry at discharge of 25,800 cfs (ADF&G,1982).
~Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method 6f
determining slough physical habitat variables.
""1
5-13
~
,I
Sheet 14 of 16
1/See last page of this table for explanation of conditions.
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,fornarratfve and worksheets explaining method of
determining slough physical habitat variables.
5-14
I I
Sheet 15 of 16
Table A-5 (con1t)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RAB IDEUX SLOUGH
Condition 11:/Condition 21:/Condition 31:/
Susitna River
Discharge at
Gold Creek
(cfs)
Mainstem
Discharge
(cfs)
Water
Table
Elevation
(ft ,ms 1)
IVlainstem
Discharge
(cfs)
Water
Table
Elevation
(ft,msl)
Mainstem
Discharge
(cfs)
Water
Table
Elevation
(ft,msl)
1,000
3,000
5,000
7,000
9,000
11,000
12,000
13,000
15,000
17,000
19,000
21,000
23,000
25,000
27,000
29,000
31,000
10,000 31,000 55,000
12,000 33,000 57,000
14,000 35,000 59,000
16,000 37,000 61,000
18,000 39,000 63,000
20,000 41,000 65,000
21,000 42,000 66,000
22,000 2/43,000 2/67,000 2/
24,000 45,000 69,000
26,000 47,000 71,000
28,000 49,000 73,000
30,000 51,000 75,000
32,000 53,000 77,000
34,000 55,000 79,000
36,000 57,000.81,000
38,000 59,000 83,000
40,000 61,000 85,000
-1:/See last page of this table for explanation of conditions.
2/No well data avaible for Rabideux Slough;for a description of expected water table
conditions,see Attachment A-4.~
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of .~
determining slough physical habitat variables.
-.,
5-15
Sheet 16 of 16
Table A-5 (can't)
MAINSTEM DISCHARGE VS.PHYSICAL HABITAT VARIABLES
RABIDEUX SLOUGH
Mainstem Discharge =QGC +QC +0T
in which,
QGC =
QC =
QT =.-Cond it ion 1:
Susitna River at Gold Creek (USGS Gage No.15292000)discharge
Chulitna River near Talkeetn~(USGS Gage No.15292400)discharge
Talkeetna River near Talkeetna (USGS Gage No.15292700)discharge
QGC =
r'.QC =
°T =
1,000 to 31,000 cfs in 2000 cfs increments
90%exceeded flow during the month of September
90%exceeded flow during the month of September
Condition 2:
QGC =1,000 to 31,000 cfs in 2000 cfs increments
QC =average monthly flow in August
0T =average monthly flow in August
f"'"Condition 3:
QGC =1,000 to 31,000cfs in 2000 cfs increments
0c =10%exceeded flow during the month of June'
0T =10%exceeded.flow during the month of June
Note:See Figure A-5 for location of mouth,mid-slough,and upstream berm.
See Attachment,Part 4,for narrative and worksheets explaining method of
determinihg slough physical habitat variables.
5-16
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slough at a Susitna River discharge (measured at Gold Creek)of 31,100
cfs.The threshold discharge for overtopping the intermediate berm
(29,000 cfs)was estimated by comparing computed and/observed Susitna
River water surface elevations with the berm crest elevation.'The
threshold discharge between Regimes I and II (10,000 cfs)was estimated
from field observations.
Slough Discharge
Slough discharges were estimated to be 3 cfs for Regime I and 8 cfs in
Regime II based on field measurements (ADF&G,1982).Slough discharge
for Regime IIA was estimated by computing discharge over the interme-
diate berm and adding this to Regime II discharge.
Water Surface Elevation
Water surface el evat ions at the slough mouth are based on a rating
curve developed from staff gage readings between 11~500 cfs and
26,500 cfs.Between 10,000 cfs and 11,500 cfs,and between 26,500 cfs
and 31,000 cfs,the rating curve was extrapolated.Hydraulic computa-
tions,assuming uniform flow,were made to estimate slough mouth water
surface elevations for discharges less than 10,000 cfs.
Mid-slough water surface elevations are based on in-field measurements
for mainstem discharges which exceed 10,000 cfs.For mainstem dis-
charges less than 10,000 cfs~hydraulic computations were made.
Water surface elevations at the intermediate and upstream berms were
estimated using broad crested weir computations.
Flow Depth
Flow depths w~re computed by subtracting thalweg elevations from water
surface elevations~determined as described above.
Velocity
Average slough flow velocities were computed by dividing the slough
discharges by flow cross-sectional areas.Lateral distributions of
velocity-were measured at cross sections about 1600 feet upstream of
the slough mouth and are shown in the Attachment.
Wetted Surface Area
For ma i nstem discharges greater than 10,OOOcfs,wetted surfacE:!areas
were estimated using aerial photographs for mainstem discharges greater
than 10,000 cfs.For mainstem discharges less than 10,000 cfs the
wetted surface area was estimated using computeds lough water surface
profil es and surveyed cross sections.
6
Wetted Perimeter
Wetted perimeters at the slough mouth,mid-slough,and the intermediate
berm were measured from the surveyed cross sections and the water
surface elevations determined as described previously..
Water Table Elevations
Water table elevations were derived from data collected at observation
wells in the slough.
A.5.2 Slo~gh ~
A map of Slough 9 is shown on Figure A-3.Methods of analyses are
given in the Attachment,Part 2.
Threshold Discharges
The threshold Susitna River mainstem discharges between Reg'ilile I and
Regime II (11,000 cfs)and between Regime.II and·Regime III (20,500
cfs)are based on plots of measured mainstem and slough discharges.
Slough Discharge
The slough discharges are based on the same field measurements as for
Threshold Discharges.
Water Surface Elevation
Slough mouth water surface elevations are based on staff gage readings
for mainstem discharges greater than 11,000 cfs.For mainstem dis-
charges less than 11,000 cfs,the slough mouth water surface elevation
was assumed constant.This water surface elevation reflects an esti-
mate of flow depth at staff gage 129.0 for a mainstem discharge of
10,000 cfs and a slough discharge of 3cfs (Trihey,1982,Table 4,p.
21)•
All mid-slough water surface elevations are based on a rating curve
derived from staff gage readings.Upstream end water surface eleva-
tions are based on water surface profiles computed with the U.S.Army
Corps of Engineers computer program for water surface profiles,HEC-2.
Flow Depth
Flow depths were computed by subtracting the thalweg elevations from
water surface elevations determined as described above.
Velocity
Average slough flow velocites were determined by dividing slough dis-
charge by the flow cross sectional areas.Lateral and longitudinal
distributions of velocities obtained in the field are shown in the
Attachment.
7
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Wetted Surface Area
For mainstem discharges greater than 11,000 cfs,wetted surface areas
were estimated from aeri a 1 photography.For ma i nstem discharges 1ess
than 11,000 cfs,the wetted surface area was estimated using computed
slough water surface profiles and surveyed cross sections..
Wetted Perimeter
Wetted perimeters were·estimated to be equal to wetted surface widths
(top widths)for the slough mouth and the upstream end of this slough.
Top wi dths were estimated from aeri a 1 photos and computed s laugh water
surface profi les and surveyed cross sections.Wetted perimeters were
computed from surveyed cross sections for mid-slough.
Water Table Elevations
Water ta~le elevations were derived from data collected at observation
wells in the slough.
A.5.3 Slough..?l
A map of Slough 21 is shown on Figure A-4.Methods of analyses are
given in the Attachment,Part 1.
Threshold Discharges
The threshold Susitna River mainstem discharges between Regimes II-A
and III (26,000 cfs)and between .Regimes I and I I (21,300 cfs)are
based on field measurements of slough and mainstem discharge.
Slough Discharges
Slough di scharge est imates are based on the same fi e 1d measurements
indicated in the preceding paragraph.
Water Surface Elevation
For mainstem discharges greater than 21,300 cfs,water surface eleva-
tions at the slough mouth are based on a rating curve derived from
staff gage readings.A constant water surface elevation at the slough
mouth was assumed for all mainstem discharges less than 21,300 cfs.
Mid-slough water surface elevations were estimated from staff gage
readings and average daily elevations from a stage recorder.Constant
water levels were assumed for Regimes I,II,and II-A.
Intermediate and upstream berm water levels were estimated from staff
gage readings.
8
Flow Depths
Slough flow depths were estimated by subtracting the thalweg elevation
from water sDrface elevations determined as described above.
Vel oc ity
Average slough flow velocities were estimated by dividing slough
discharges by flow cross sectional areas.Average velocities for four
measured flows are shown in the Attachment.Lateral and longitudinal
distributions of velocities obtained in the field are shown in the
Attachment.
Wetted Surface Area
Slough wetted surface areas were estimated from aerial photography.
Wetted Perimeter
Slough wetted perimeters were assumed to be equal to wetted surface
width (top widths)based on aerial photography and field measurements.
Water Table Elevations
There is not sufficient information to estimate the water table level
at this slough since wells have not been installed.Geologic materials
are expected to De similar to sloughs 8A and 9.
A.5.4 Rabideux Slough
A map of Rabideux Slough is shown on Figure A-5.Methods of analyses
for this slough are presented in the Attachment,Part 4.
Threshold Discharges
There is very little flow in this slough until the upstream berm is
overtopped (Susitna River mainstem discharge 66,000 cfs).
Slough Discharges
Slough discharge estimates are based on four field observations.Two
observations of slough discharge when the upstream berm was not
overtopped (Regime II)indicated negligible flow in this slough.Two
observati ons of slough di scharge when the upstream berm was overtopped
were used to estimate slough discharge in Regime III.
Water Surface Elevations
Water surface elevations at the slough mouth are based on staff gage
readings and a surveyed water surface level.Mid-slough water surface
levels are based on surveyed water levels and measurements of top
9
-
widths from aeri a1 photography projected on surveyed cross sections.
The transect at mid-slough has been observed to be dry at a mainstem
discharge of 25,800 cfs.Mid-slough water levels are influenced by
water levels at the mouth for mainstem discharges greater than
53,000 cfs.Upstream berm water surface levels were estimated from
hydraulic computations assuming a triangular broad crested weir.
Flow Depths
Slough flow depths were determined by subtracting the slough thalweg
elevations from water surface elevations derived as described above.
Vel oc ity
Average slough flow velocity was computed by dividing slough discharge
by the slough cross sectional area.Lateral and longitudinal distribu-
tions of velocities as measured in the field are shown in the Attach-
ment.
Wetted Surface Area
Wetted surface areas were estimated from aerial photography.
Wetted Perimeter
Wetted perimeters were estimated from field surveyed cross sections at
the slough mouth and·mid-slough.Wetted perimeters were estimated to
be equal to wetted surface wi dths (top wi dths)measured from aeri a 1
photography at the upstream berm.
Water Table Elevations
There is not enough information to estimate water table levels at this
slough since wens have not been installed.However,groundwater
levels are expected to respond in a manner similar to sloughs upstream
of Talkeetna (Sloughs 8A and 9),
A.6 Discussion of Results
The following discussion refers to the results presented in Tables A-I
through A-5 ..
A.6.1 S 10 ug h 8A
A summary of the results for Slough SA is presented in Table A-2.
Regime II occurs over a mainstem flow range of 10,000 to 26,000 cfs.
and thus is the dominant regime characterizing Slough SA in the range
of incremental flows analyzed.Intermediate and upstream berms are not
overtopped unt il ma i nstem fl ows have reached 26.000 and 30.000-32,000
cfs.respectively (Table A-I).
10
Slough discharges are generally low at mainstem flows less than the
overtopping discharge and vary between 3 and 20 cfs.A correlation of
slough flows with mainstem flows at less than overtopping discharges is
not apparent at this level of analy~is,perhaps because of local runoff
and groundwater inflow from upland areas.Therefore,constant slough
flows of 3 and 8 cfs were assumed for Regimes I and II,respectively.
In Regime I,water surface elevations at the slough mouth are con-
trolled by a berm downstream of the mouth.Hence,for the 3 cfs dis-
charge the water surface elevation at the mouth remains constant.In
Regime II,water surface elevations and depth at the slough mouth in-
crease as Susitna River flows increase because of a backwater effect.
The depths presented in Table A-2 represent maximum depths at cross-
section WI (see Figure A-2).For Regime 1,the depth at the controll-
ing berm downstream of cross-section WI is estimated to be 0.1 ft.
For all regimes,the water surface elevations and depths at mid-slough
are dependent on slough discharge.At the upstream berms,depths are
zero until the berms are overtopped.
At mainstem flows less than 29,000 cfs,average velocities in the
slough are low because of the low slough discharges.
Wetted surface area is constant for all mainstem flows in Regime I.As
higher mainstem flows increase the backwater effect of Regime II,wett-
ed surface area increases.Wetted perimeter at the mouth also in-
creases as mainstem flows in Regime II increase.
Groundwater elevations at mid-slollgh,Well A,do not appear to be
significantly correlated with mainstem discharge.At mid-slough,Well
B,and the upstream well,there is a direct relationship with mainstem
discharge.This relationship is depicted on Sheet 3 of Table A-2.
Slough 2
Summary information for Slough 9 is presented in Table A-3.
For Regime I (mainstem flow less than 11,000 cfs)and Regime II (11,000
to 20,500 cfs),there is little variation in sloDgh discharge.Hence,
based on observed data,constant slough discharges of 3 cfs and 6 cfs
were assumed for Regimes I and II,respectively.At discharges greater
than the upstream berm overtopping discharge (Regime III),slough dis-
charge increases with mainstem discharge.Regime III slough discharges
presented in Table A-3 represent values estimated from a plot of the
observed data.
In Regime I,water surface elevations at the mouth of Slough 9 are con-
trolled by a berm downstream of the mouth.For the assumed 3 cfs
slough discharge,the water surface elevation remains constant.At 3
cfs,the depth over the berm is computed to be 0.1 feet.In Regimes II
and III,the water surface elevations and depths at the mouth of the
slough increase with increasing mainstem discharge.
11
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.,..
'I,
I~
The mid-slough water surface elevations and depths shown in Table A-3
are at a mid-slough pool.The water surface elevations and depths are
essentially independent of mainstem discharges for Regime I and II.
However,when the upstream berm·is overtopped,the increase ins laugh
discharge results in an increase in water surface elevation and depth.
Once overtopped,the water surface el evat ions at the upstream berm
increase directly with mainstem Susitna water surface elevations.
The average velocities presented for the mouth of Slough 9 are the
velocities over the berm at the slough mouth.Since the cross section-
al area at the berm is a minimum,velocities are higher than for any
other cross section near the mouth.Mid-slough velocities are low
throughout Regimes I and II but increase when the upstream berm is
overtopped.
The wetted surface area remains constant throughout Regime L However,
in Regime II,as the backwater from the mainstem increases with
increasing SusitnaRiver discharge,the wetted surface area increases.
The wetted perimeter at the mouth is constant through Regime I and
increases through Regimes II and III.Mid-slough and upstream berm
wetted perimeters do not change until overtopping occurs.
Water table elevations at Slough·9 presented in Table A-3 exhibit
considerably more change with mainstem discharge than do those pre-
sented for Slough 8A (see Table A-2).
Slough 21
Summary information for Slough 21 is contained in TableA-4.
Regime I flow at Slough 21 ihcludes flows up to a mainstem discharge of
21,400 cfs .Regime II flow occurs avera range of discharges from
21,400 cfs to 24,800 cfs.Regime II-A,resulting from overtopping of
the·intermediate berm,occurs during mainstem flows of 24,800 cfs to
26,000 cfs and Regime III occurs when the highest berm is overtopped at
26,000 cfs.
Slough discharges measured during Regime I flows were low,varying
between 2 and 12 cfs.Since there is no apparent correlation with
mainstem discharge,a constant slough flow of 5 cfs was assumed (see
Table A-4).For Regime II,at mainstem flows between 23,000 and
25,000 cfs,a slough discharge of 9 cfs was assumed.For Regime III,a
relationship based on observed data was used to estimate slough dis-
charge.
As a result of the assumed constant slough flow for Regime I,the water
surface elevation and slough depth at the mouth are constant.The
depths presented reflect a pool depth upstream from the cantrall i ng
berm and not the depths over the berm.As backwater effects and over-
topping of the upstream berms begin,the water surface elevations and
depths increase.
12
At mid-slough,the water surface elevation (and depth)is constant
throughout Regime I.As slough discharge increases from 5 to 9 cfs,
(Regime I to Regime II),there is a slight increase in water surface
elevation (and depth).The increase at mid-slough is attrioutable to
the increase in discharge since the backwater effects do not extend
upstream to the mid-slough location.
Average velocities throughout all flow regimes and for all locations
analyzed,remain low.As illustrated in Table A-4,velocities at the
slough mouth do not exceed 0.2 feet per second for the range of flows
considered.
In Table A-4,wetted surface area begins to increase due to backwater
(Regime II)at a mainstem flow of 21,400 cfs.At flows higher than
26,000 cfs,the increases in wetted surface area are the result of both
backwater and upstream berm overtopping.
Wetted perimeter at the mouth responds to mainstem flow in a mann-er
similar to wetted surface area.The wetted perimeter at the mid-slough
is essentially constant until the upstream berm is overtopped.-
~o groundwater elevation data is available for Slough 21.
Rabideux Slough
Summary _information for Rabideux Slough is contained in Table A-5
(Sheets 1 through 16).
Rabi deux Slough is affected by the backwater from the Sus itn a Ri ver
(Regime II)at mainstem flow conditions (at the sloL1gh)as low as
approximately 10,000 cfs.This regime persists until the upstream berm
is overtopped at a mainstem flow of approximately 65,000 cfs.
Measured slough discharges at flows less than the overtopping discharge
were eithe~not measurable or were less than 1 cfs.Therefore,slough
discharge was assumed to _be zero for Regime II.However,once over-
topped,Rabideux Slough discharge increases significantly.
Water surface elevation (Table A-5,Sheet 2)and depth (Table A-5,
Sheet 5)at the slough mouth increase with mainstem discharge over the
range of flows considered.'
The selected mid-slough location is dewatered at flows less than 26,000
cfs (Table A-5,Sheets 3 and 6).At hi gher fl ows,i so 1ated ponded
water has been observed.Therefore,from flows of 26,000 cfs to
53,000 cfs a constant water surface elevation and a depth of 0.3 feet
were assumed.At flows greater than 53,000 cfs,water levels and
depths increase as the resu It of backwater from the ma i nstem.Once
overtopping of the upstream berm occurs,the water level at mid-slough
increases at a greater rate than during Regime II.The water surface
elevation (Table A-5,Sheet 4)and depth (Table A-5,Sheet 7)at the
13
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.....
upstream berm change only after the berm is overtopped.At the higher
overtopping discharges,the upstream berm becomes submerged because of
backwater..
Velocities at the mouth (Table A-5,Sheet 8)are zero until overtopping
occurs.However,because the cross sectional area is relatively large,
velocities at the slough mouth remain low even during an overtopped
condition.At mid-slough (Table A-5,Sheet 9),velocities remain low
during overtopping because of the backwater effect.Velocities at the
upstream berm (Table A-5,Sheet 10)during overtopping also remain low
because of backwater.
Total wetted surface area (Table A-5,Sheet 11)increases with increas-
ing mainstem discharge as a result of backwater up to the overtopping
discharge of 65,000 cfs,and as a result of both backwater and over-
topping once overtopping 6ccurs.The wetted surface area includes the
areas of both the pond at the ups tream end of the slough and the lower
slough even though they are not hydraulically connected at lower
flows.
The wetted perimeter at the slough mouth (Table A-5,Sheet 12)in-
creases because of the backwater effect.The wetted perimeter responds
to the shape of the cross section,increasing quickly at first and then
remaining relatively constant.At high flows,the wetted perimeter
exhibits a large increase because of overtopping of the flood plain.
The wetted perimeter at mid-slough (Table A-5,Sheet 13)is 12 feet or
less until backwater effects occur at a mainstem flow of 53,000 cfs.
Ata discharge of 79,000 cfs,the water surface encroaches on the flood
plain resulting in a large increase in wetted perimeter.
The wetted perimeter at the upstream berm (Table A-5,Sheet 14)is zero
until the Upstream berm is overtopped.
A.7 .References
.Alaska Department of Fish and·Game,lIS us itna Hydro Aquatic Studies,
Phase I Final Draft Report ll
,Volume 1,1982.
Alaska Department of Fish and Game,lIS usitna Hydro Aquatic Studies,
Phase II Basic Data Report",Volume 4,1983.
Chow,V.L,Open Channel Hydraulics,McGraw-Hill,New York,1959.
R&M·Consultants,Inc,"Susitna Hydroelectric ProJect,·Hydraulic
Project,and Ice Studies",for Alaska Power Authority,Anchorage,
Alaska,March 1982.
,"Susitna Hydroelectric Project,1982 Hydrographic Sur-----.....------,;:-veys",for Alaska Power Authority,Anchorage,Alaska,December
1982a •
14
,"Susitna Hydroelectric Project,Slough Hydrology Interim--~----;-;;-Report ll
,for Alaska Power Authority,Anchorage,Alaska,Decem-
ber 1982b.
Trihey,E.W.,"Preliminary Assessment of Acres by Spawning Salmon to
Side Slough Habitat above Talkeetna",for Alaska Power Authority,
Anchorage,Alaska,November 1982.
U.S.Army Corps of Engineers,"HEC-2,Water Surface Profiles,Users
Manual",Hydrologic Engineering Center,Davis,California,
January 1981.
15
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