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Home My WebLink AboutAPA1801As accepted by FERC, July, 27 , 1983 357 Ti< I'"\2.S .~~ f"i "+I ......---------------------------....t:Ulf l'lOI BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION APPLICATION FOR LICENSE FOR MAJOR PROJECT SUSITNA HYDROELECTRIC P,ROJECT VOLUME 58 · ij' EXHIBIT E Chapter 2 (Figures) FEBRUARY 1983 L..........;... __ ALASKA POWER AUTHORITY __ ~ 1 1 1 J • 1 J j J I / I I I I I I I I I I I / / / .- / LOWER DRAINAGE BASIN ---.- SUSITNA RIVER ./ DRAINAGE BASIN~/./ ../ ./" / ./" /.- / / I I / I I I /' / --.......... 0 ., ........ ........ ........ ........ ........ ' ........ MIDDLE 0 ---/ -----..... ........ " " \ \ I H I I I "'"(P I 6' I I I \ \ '\ \ '7 \ \ \ \ \ \ \ 0 I NOTES: I. CONTINUOUS WATER QUALITY MO N ITOR 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. _______ ./ COOK INLET ~EKLUTNA LAKE / /./ ../.--......... / --- O~~~~IOiliiiiiiiiiiiiiiiiiiiilii20 MILES SCALE c::: / / / / STREAMFLOW GAGING AND WATER QUALITY MONITORING STATIONS STATION (A) SUSITNA RIVER NEAR DENALI (B) SUS ITNA RIVER NEAR CANTWELL (VEE CANYON) (C) SUS I TNA RIVER NEAR WATANA DAMSITE (D) SUS ITNA RIVER NEAR DEVIL CANYON (E) SUSITNA RIVER AT GOLD CREEK (F) SUS ITN A RIVER NEAR SUNSHINE (G) SUSITNA RIVER AT SUSITNA STATION (H) MAC L AREN RIVER NEAR PAXSON (I) CHULITNA RIVER NEAR TALKEETNA (J) TALKEETNA RIVER NEAR TALKEETNA (K) SKWENTNA RIVER NEAR SKWENTNA (L) YENTNA RIVER NEAR SUSITNA STAT ION (.!) z w (.!) (.!) <t <t (.!) (.!) ~ w (.!) w g <t (.!) LL.. 1-<t (J) (.!) :::!: <t 1-LL.. w (J) LL.. 0::: w i=! 1-0::: (J) (.) (J) X X X X X X X X X X X X X X X X w w 0::: (.!) "' ::::> 0::: (.!) 1-<t ~ >-<t I _J 1-0::: (.) a.. w (J) :::!: _J a.. 0 <t <t :::!: (J) ::::> w 1-0 1-z 0 w w <t 1-0::: 0::: :::!: 0 <t w w _J :::!: ~ ~ 0 0 w w :J ~ ~ (J) aJ (.) X X X X X X xl X X X X X X X X X X X X X X X X X X X X X X X X X X FIGURE E .2. I 1 l 1 l I J 'J l l J l ] J J J J SOURCE ' R 8 M 1982 SINGLE CHANNEL: -STABLE RIVER MILE 103 .2 -NON-ERODIBLE BANKS; CONTROLLED BY VALLEY WALLS, BEDROCK OR ARMOR LAYER CONSISTING OF GRAVEL/COBBLES. -CHANNEL MAY BE EITHER STRAIGHT OR MEANDERING i IN STRAIGHT CHANNELS, THALWEG OFTEN MEANDERS ACROSS CHANNEL .. -OCCASIONll FRAGMENTARY ALLUVIAL DEPOSITS IN FLOODPLAIN. SINGLE-CHANNEL RIVER PATTERN FIGURE E.2 . 2 1 1 l J l 1 l l J SOURCE ' R 8 M 1982 RIVER Ml 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 l l l l ] l l l l ] J I -' SOURCE , R aM 19112 CHULITNA RIVER NEAR CONFLUENCE WITH SUSITNA RIVER BRAIDED CHANNEL: -FLOODPLAIN IS VERY WIDE AND SHALLOW EVEN AT FLOOD 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 . BRAIDED-cHANNEL RIVER PATTERN FIGURE E.2 .4 I J l l ) J l ] J J 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 BRAID£0, SPliT CHANNEL AND SINGtE CHANNELS WITHIN FLOODPLAIN. -RELATIVELY UNSTABLE, SUBJECT TO MAJOR LOCAL CHANGES DURING SINGLE FLOOD EVENTS. -LARGE AMOUNT OF FJNE SUSPENDED SEDIMENT HELPS STABILIZE BANKS; DENSE VEGETATION EFFECTIVE IN TRAPPING SEDIMENT. -BED MATERIAL CONSISTS OF GRAVEL/SAND WITH POCKETS OF SILT. MUL Tl-CHANNEL RIVER PATTERN FIGURE E.2. 5 l 1550 1500 J 1450 ] 1 1400 1-w w LL. z 1350 0 ~ w _J w 1300 1250 1200 1150 J 160 :JC w LLI 1 a: (.) J _J > LLI J 0 SOURCE: R 8 Ill 1982 ~ I. ~/J _ ... c ~ /. URX 107 ~/ URX Ill ,. ~ v ,. ,.. ,. ... _ .... / 6 _ ... ~ ~ THALWEG PROFILE ~~ ,.. ~ WATER SURFACE PRO FILE y - FOR Q= 8,10 0 CFS AT WATANA ... ~ ~ ~ / / / I 162 164 166 NOTES: I. WATER SURFACE PROFILES BASED ON PRELIMINARY DATA. 168 170 172 174 176 178 RIVER MILE 2. URX = UPPER RIVER CROSS SECTIO N (ABOVE DEVIL CA NYON). SUSITNA RIVER THALWEG AND WATER SURFACE PROFILES DEADMAN CREEK lO DEVIL CREEK 180 182 184 ---~ I lRx 102 186 188 :JC LLI LLI a: (.) z <t ::::E 0 <t LLI 0 FIGURE E.2.6 1 950 900 850 800 1-w w I.J... z 0 750 i= <l > w _j w / ~ ," i-' /' ~ V: ;:::; ,-" _., h-LRX 68 ./' ~/ ,.'/ ,./ / ..... """'' / WATER SURFACE PROFILE FOR /~ ~ 100 YR. FLOOD /): ~/ / LRX 59 ,/ p / ~ / WATER SURFACE PROFILE FOR ;' ~THALWEG PROFILE PROBABLE MAXIMUM FLOOD"' ty' ~--- ~/"""' ~,, ..... ~ \ / ,.""' z WATER SURFACE PROFILE /~ FOR Q = 13,400 CFS AT ~ GOLD CREEK L 0 r ~ ./' 7 ................. ~/ ~-"/ ~ .... ,............ ~ L~X 35 ~ ... __ ., z LRX 29 700 650 600 550 126 128 130 132 134 136 138 140 142 144 146 148 150 NOTES: I. WATER SURFACE PROFILES BASED ON PRELIMINARY DATA. 2 . LRX =LOWER RIVER CROSS SECTION (BELOW DEVIL CANYON). SOURCE: RaM 1982 z <l :!: 0::: w :I: (/') ~~ RIVER MILE -> 0-zo::: SUSITNA RIVER THALWEG AND WATER SURFACE PROFILES DEVIL CANYON TO RM 126 :.:: z w 0 w >-0::: z (.) <l w (.) (.!) _j <l > 1- 0::: w 0 0 a.. 152 154 FIGURE E. 2 .7 650 600 550 1 j I-500 LLJ LLJ u. z 0 ti > LLJ _J 450 LLJ 400 350 300 98 SOURCE : R 8 M 1982 ~~-' v_:::: :/: ..,......... :/~ ~.....,...-~ .... -/ /" WATER SURFACE PROFILE ~ ~ --/ FOR 100 YR . FLOOD .~ ---~_: ,-':/ _... - ~ l---y-,-.,.../' I -/ ~ LRX 24 WATER SURFACE PROFILE FOR ~----z.:-PROBABLE MAXIMUM FLOOD- , ~ ...--" .......-----=-----:: ~,.,...~ THALWEG PROFILE Y'~ ,-y ~RX 11 ~~-v~-----... ~ ~c:----v ... ,- ~ ,,---: ,.,... ::...---~ I ~~~ ~ ~ /WATER SURFACE PROFILE -~ ....., ..... ~ --.... FOR Q= 13,400 CFS AT ------./ GOLD CREEK ....--'~-~ -LRX 9f ( LRX 3 100 102 104 106 108 110 112 114 116 118 120 122 124 126 <lLLJ Z<..> 1-z :::::iLLJ :::::>:::::> J:_J NOTES: uu. ,z I. WATER SURFACE PROFILES BASED ctO z<..> ON PRELIMINARY DATA . ~ en 2 . LRX =LOWER RIVER CROSS SECTION :::::> (BELOW DEY I L CANYON). en LLJ RIVER MILE en <l J: (..) SUSITNA RIVER THALWEG AND WATER SURFACE · PROFILES RM 126 TO TALKEETNA >-a:: a:: :::::> (..) FIGURE E.2.8 1 ~ 1 1 500 400 ~ w w PARKS HIGHWAY BRIDGE (SUNSHINE) I!.. z Q 300 ~ > w ...J w 200 ~ v KASHWITNA CREEK r CONFLUEN~ s SUSITNA -YENTNA RIVER ~" CONFLUENCE ------~ ----100 ~COOK INL: ~-~ 0 0 SOURCE•RaM 1982 10 20 30 40 50 60 70 80 RIVER MILE SUSITNA RIVER THALWEG PROFILE SUNSHINE TO COOK INLET 90 ) ------1 l 100 110 120 FIGURE E.2. 9 .. -) NOTES: Q-= FLOW (CFS) (e)-= ESTIMATED SOURCE' RaM 1962 1-w w LL. z 0 i= oct > w ..J w w (.) ~ a:: ::J (/) a:: w ~ ;= 0 w 1- ::J a.. ~ 0 (.) 1 l 1- 1- 1- 1- 1- r- 1- f- 1- 630 f- r- 1- 1- 1- r-r--- 620 --- - --- - 610 --- -- - c- 1- 1- 600 1- 1- 1- f- 1- f- 1- 1- hI II I I I I I 590 -1000 1 l 1 ."' "' ~ 0=52 000 I ·a=345oo-lj'B f\ Q: 23 400 Q: 17.000 Q: 13,400 \ " u ·"'-Q: 9 700 0= 6 OOOCel II II I I I I I. II II I I I I I II l I l l I l I l I I I I I l I I I I I I I I I I I IIJJIIIll 0 1000. 2000 3000 4000 DISTANCE (FEET) CROSS-SECTION NUMBER 32 NEAR SHERMAN (RIVER MILE 129.7) 5000 1 1 .. J FIGURE E.2.10 1 1 l --l ) l SUSITNA RIVER SUSITNA RIVER PLAN INDEX MAP l . 1 E.2 .12 ,· DEVIL CANYON FIGURE E.2.11 LEGEND : + RIVER MILE ~ LRX CROSS SECTION 100 YEAR FLOOD PLAIN BOUNDARY m Q@ THERMALLY INDUCED OPEN LEAD DURING WINTER BERM STAFF GAGE SITE SUSITNA RIVER PLAN RM 152 TO RM 145 FIGURE E.2.12 NOTE FOR LEGEND SEE FIGURE E.2.12 SUSITNA RIVER PLAN RM 145 TO RM 139 FIGURE E.2 .13 NOTE: FOR LEGEND SEE FIGURE E.2.12. SUSITNA RIVER PLAN RM 138 TO RM 132 FIGURE E.2. 14 NOTE: FOR LEGE ND SEE FIGURE E .2 .12 . SUSITNA RIVER PLAN RM 131 TO RM 125 FIGURE E .2 .15 NOTE: FOR LEGEND SEE FIGURE E.2 .12 . SUSITNA RIVER PLAN RM 124 TO RM 118 FIGURE E.2.16 NOTE. FOR LEGEND SEE FIGURE E.2 12. SUSITNA RIVER PLAN RM 117 TO RM Ill FIGURE E.2. 17 NOTE:FQR LEGEND SEEFIGUREE.2.12. SUSITNA RlVER PLAN RM 110 TO RM 104 FIGURE E.2.18 NOTE= FOR LEGEND SEE FIGURE E.2 .12. SUSITNA RIVER PLAN RM 103 TO RM 101 FIGURE E .2.19 ... ... __ ...... ~- RM 97 .-s~· < • .. :. NOTE FOR LEGEND SEE FIGURE E.2 . 12. ~ •> . .. 'CHl/LtrNA RIVER _.., ~ ,./,I-> v=• f SUSITNA RIVER PLAN RM 100 TO RM 97 . .. 1111'' ..--;_, 'f 1 ~ r i' '-,. / -·- FIGURE E .2 .20 610- 605 ........ 1- tj 600- I..L. z 0 ~ ~ 595 ..J LL.l N / 62t27 -r£_ 0 SLOUGH 9 NOTE: WATER SURFACE PROFILE IS REPRESENTATIVE OF AUGUST 24, 1982 CONDITIONS; MAINSTEM DISCHARGE AT GOLD CREEK 12,500 CFS, SLOUGH DISCHARGE 3 CFS. HEAD OF SLOUGH AT STATION 62 t 27 '?Pfffffftffi.i{f ~"''~\ ~"' ~ \s.G ....1 G~p.o\€: ~~p.CP ·0. ·. ·o·0 · · ·O··• ·o·C::: o:·.":······o:~: .. ·:cf··:··· -o:o:'·es··.• .. c,·:~o···:c.~~::~·~~ ·--~--.. :..;.a· ··o.·o.· ·:· ·.· .. ;;~~·c:s. ·:o·~·<~~~:~o··--·• ...,. •, .. '••'0• ~· • •, ·--.-..... :-~~ ... :~-:o·:=e:a·-~~.:o:.; .. :~~·c/c;-D.~~o:c .. :·· .. o·.:o··. ·o ... ·o·-· ·!--l.·o:·o a;.. . .:· . ., __ ...... -..~ .... o·Q~.':.:K·.'·o'(S.o> ·· ·~····:~. :0· ·.o:-~;·_p::•:.•; .. ·""-! ··•. 1 a--· .;""7· ~~ ····~:cs·:~-p-.-:~-~:g&,o::¢>:·c~o-~-.. ~ .. ~-~:!G·:~:A:·:~G.-~~b -~~6.-~:C)·¥~-: .. ~ • ·:~_::<> :-~:-':-:'.o. ·o-~·c::Y.6=o:.•.-o:~ -~ 0: ... -, ~-·.~···. ', ....... · .. : .. :·:· -.... :_"· , · . .oo:-:aO.o.•:P.o-. -~~ ..-.· ... ()·;..:., ..... ('\ .. ~·u=-..... ~ .. -...... . 590 ., -... :.-.~:-~o-,0-":'==~=-:~:-_, .. -.. ::'-.:-:-... -, .. ,-,.-<.-;-~:-.·.~.-:-.,.,.,:-:.-·~7,:~'f% j-~iJ:'W8:;;~:q}: i~I"{:.U~f.~~:~.~t~;fr%.~~t~~ ~;::~%:j !~~v~~s:·~""":E -. ':,. .; ·• ·.-.·,:··.~-,,-:>.·MOUTH OF SLOUGH> '""'-:··'!6f:•.bi!Q":0~.:~c,¢:s0o'.Q-~-()~-0.~.Q:.<;:>:·Q':o:.!.()OC·-:;!._:' E:;..:::f()J COBBLE a BOULDER .. -·.·a·':· •. -.·: .. ~·.·.··.·:· .. ·.• ~:·.o. ··. ,·,,. -.': ~·· .. -:--1· .~ .... •. '.!D:.o.•:.· q.:j-j.o.· ... ·o· ... o ... o.n· :•=·· ··.· ... ·/"".tt?·;....: . .....:J: 585 I .... j .....•. ; ·, ·-.. · .. ·. •("' . ; .• ·, ." .. /'.,.·0. y..,;, . ., .. ·(")i ·,. ·.o· a."-'l{cs ....... ·o·j<""i' .,....,.o, •. o.c.....-'.' j• ,; .. ; I I I -10+00 -5-tOO 0100 5+00 10+00 15+00 20+00 25+00 30+00 35 .. 00 40+00 45+00 50 .. 00 55+00 t..RIVER MILE 128.4 DISTANCE (FEET) SLOUGH 9 THALWEG PROFILE SOURCE: TRIHEY 1982 FIGURE E.2.21 1- l.!.J l.!.J I.J... ~ z 0 i= ~ l.!.J _J l.!.J NOTES: 6:)5 600 5!~5 5HO 5::!5 5BO -30 LEFT BANK ~- 0 I. CROSS SECTION # 128.8S3 APPROXIMATELY 2400 FEET UPSTREAM OF SLOUGH MOUTH. 2. CROSS SECTION REPRESENTS VIEW LOOKING DOWNSTREAM. 3. MAINSTREAM DISCHARGE MEASURED AT GOLD CREEK. 30 k,HT NK J t -----1------- L AUG. I WATER SURFACE ELEVATION (MAINSTEM DISCHARGE 26,400-GFS) I I 60 90 120 150 ISO DISTANCE (FEET) SLOUGH 9 CROSS SECTION FIGURE E.2. 22 (j) IJ... (_) 0 0 0 50 40 30 20 10 lJ.J (.!) 9 a:: ~ 8 (_) ~ 7 0 6 5 4 3 2 1.01 .. .. .. .. "' I~ -r---....... r------"'WYI969 1.25 2 5 10 20 RECURRENCE INTERVAL (YEARS) LOW-FLOW FREQUENCY ANALYSIS OF MEAN ANNUAL FLOW AT GOLD CREEK l l 50 100 --~ 500 1,000 10,000 FIGURE E.2. 23 J J J J ee--~,~~,--~lf--~1~1---lf--~1--~l~l~l~l--~l --~lf~T--~T --~lf--~l~l --~l~f -~1 -l~~l~f-.l--'l--lrrf'l--'J --"lfllr-'I--IT-JIIT--lr-lf-rlll--rl--r-ll f.-LEGEND : 80 f.-- CANTWELL FLOW WAT ANA FLOW GOLD CREEK FLOW - - nL-------------------------------------------------------~~------------------------------------------------------------------------~ -~ ~ ~~-------------------------------------------------,~,~--------------------------------------------------------------------~ I \ ,, -I I I I ~~--------------------------------------------------------~~~+-----------------------------------------------------------------------------~ ~· I .~ -~ f.-I ~ ~ 48~---------------------------------------------------+.:~~~~~V\~~------------------------------------------------------------------, ~ f.-,/\\v - ~ 1 .. ·~/ ~'~, <t • : I I i G 40~--------------------------------------------------------~~~~,~~,~------------------------------------------------------------------------~ en : 1 I a ; V f--~ JANUARY FEBRUARY MARCH APRIL NOTE : TIME SCALE IS IN INCREMENTS OF 10 DAYS . ... . . . JUNE MONTH JULY AUGUST 1964 NATURAL FLOWS CANTWELL, WATANA AND GOLD CREEK - SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E.2 .24 J J J u; u.. u § - w (.!) !r <t :I: (.) (/) 0 88~-~,~,~~,~,~,--~,----,~,~~,--~,,~~,--~,-~,,~,--~,--~Tl~~,-T.-'I'J-.I--~I--rlr~Jir-•r--'''l-.,--.-,-r,t~II--,I--II-~~J'--Tr-lfrTJII--IT--TJ-, -LEGEND : ·· · · · · · · · · CANTWELL FLOW 80 __. ----WATANA FLOW GOLD CREEK FLOW f.- 72 I- 64 I- 56 I- 48 I- 40 f- 32 I- 24 - 16 ,___ 8 I- 0 I I I I I I JANUARY FEBRUARY MARCH APRIL NOTE: TIME SCALE IS IN INCREMENTS OF 10 DAYS. I~ MAY [I ,, I \ I I I 'I I I I , ~ h \ \\ .. ! 1:: I, \ :. ',,'. f \. . \.J \w ,j \ i: \ ! \ \J,, ! \ '\\ ' ', I v:: ~ : .,_ ..-~ ,. \ J: : : : v : \ : : \ ( ....... ::' . . .. · · .. : I " AI • : .. :• I . : : ,, \~ I f l ; : f · .. : ~ \ " '-Jr ; ·:i :. ; :_ v ;' ~: :. \ I:\ \ : ~ : ~ : .... ·,J ... : · .. : ·.. : ·. ·.. \\ ~= :. ' • •.• • • • ..,. • • •.• • • " I• • \ .. .. \ :/ ... ···· ~- ·· .. ··· ... •.'-':\\~ ., .... \ · ..... : ... " ..... '" ···. ' I I I I I I I I I I I I I I I JUNE JULY AUGUST SEPTEMBER MONTH 1967 NATURAL FLOWS CANTW.ELL, WATANA AND GOLD CREEK - - - - - - - - - - - I I OCTOBER NOVEMBER DECEMBER FIGURE E . 2. 25 ' j 1 l J J J J J ~ VI I&.. u 0 0 0 - w (.!) a:: <( :I: u CJ) 0 88 - 80 - 1- 72 - 64 f- 56 f--. 48 f- 40 f- 32 f- 24 - 16 - 8 - 0 NOTE: J I lJ I I I I I IJ I I LEGEND: ........... CANTWELL FLOW ----WATANA FLOW GOLD FLOW I I .I JANUARY FEBRUARY MARCH APRIL TIME SCALE IS IN INCREMENTS OF 10 DAYS. IJ I I 11 I T I I I I I I I I I I I I I I I I I T T 1 I I I I I - - - - - - - f'1 ~ ~ ~A - I ~ A !:~,~~ ~ ~J\Y lJ) A ,~\!\ I\ 1\ 1\ I \ I V \ I "' I : \/'1 - I v-1 1:-. \ • =": \ , \) r \ \ ,, \ I Vt /\ "'t \ \.JV I f \ ! \ .·. \ r' !~ / 'i:'-'-""1 I~ I' ,_~ Y\ ~~ f.·: ···\f·::.: :: ~ \ \I '-¥ '\ /: : ;.••,,• . \r •. -, :. \ M -.. I !.\: ~: • \ • ... •• J"J • • • . . .. \ ! \ .. ~r.. \-..../ \... / -.....: . .. \ """"' \ . \ '"" A. __)/ ........ .... ····.\.!··~,~ ·. v ..... , ... / ·:, !\ . . . ·.... : """" ---- I I I I I d I I I I I I , 1 I I ···· .. ··;···r····,··· ... :i:::-:-.i .. ,::-.l ... .-::::;: ... ::-,:-.i::-.. ;~ .... 7:j ... ::-:-:,,.~ MAY JUNE JULY AUGUST MONTH 1970 NATURAL FLOWS CANTWELL, WATANA AND GOLD CREEK SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E .2 . 26 ~) J 1 J 1 1 THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 100 90 80 10 60 50 ----------------------~ 40 ----------------() 0 ~ UJ ~--J J J 1 )• I v / )/ ~V I v ! .,! /v / v ~ 30 < :z: () (/) vv .~ ~ l_..-A i5 20 10 1---.. I I 1.005 1.05 LEGEND: .6 OBSERVED DATA 0 ESTIMATED DATA -. e 95% CONFIDENCE LIMITS SOURCE' R a M 1981 ~ ........ ~-------. • • • .& A -• --.-~ • --I I I 1.25 2 5 RECURRENCE lNTERVAL(YEARS} ANNUAL FLOOD FREQUENCY CURVE SUSITNA RIVER NEAR DENALI ~ ~ I I I I I I 10 20 50 100 200 500 FIGURE E.2. 27 J ---) rn LL 0 0 0 0 - LLI C) 0:: <( :I: 0 rn c l 1 THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 100 90 80 70 60 50 40 30 20 ~ ~·/ ~ ~ ~ ~ ... ----~ ~ ~ ~ ·~ v r""' 1 J ~ L / ~ ~ / r' ~ .L ~ I~ ~ ~ .... ~____.-4 ....--- ...-_______. 10 1.005 1.05 1.25 2 5 10 20 50 100 200 500 LEGEND A OBSERVED DATA o ESTIMATED DATA e 95% CONFIDENCE LIMITS SOURCE: R B. M 1981 RECURRENCE INTERVAL (YEARS) ANNUAL FLOOD FREQUENCY CURVE SUSITNA RIVER NEAR CANTWELL FIGURE E.2. 28 1 I I J J J l ] THREE PARAMETER LOG NORMAL DISTRIBUTION· WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 1000 900 800 700 600 500 400 300 ; 200 1..1.. u 0 0 2 -100 UJ (!) 90 a: 80 <( ::t: 70 u !:!! 60 0 50 40 30 20 10 1.005 1.05 LEGEND: A OBSERVED DATA 0 ESTIMATED DATA e 95% CONFIDENCE LIMITS SOURCE' R 8 M 1981 1.25 2 5 RECURRENCE INTERVAL(YEARS) ANNUAL FLOOD FREQUENCY CURVE SUSITNA RIVER AT GOLD CREEK J J J J -1 ] 10 20 50 100 200 500 FIGURE E.2. 29 l l .. } THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD ff u 0 0 0 100 ~8 l8 50 40 30 20 =-10 w (,!) 9 0:: 8 ~ 7 u en 6 B 5 4 3 2 1.005 1.05 LEGEND: • OBSERVED DATA 0 ESTIMATED DATA e 95% CONFIDENCE LIMITS SOURCE' R 8 M 1981 J.25 ~ ~ ------............. ~· ·~"'" ............. ~ 2 5 RECURRENCE INTERVAL(YEARS) ANNUAL FLOOD FREQUENCY CURVE MACLAREN RIVER NEAR PAXSON """" / / / v / / / / ~ / v ~ __.,--.. _. ---__ _.. .....- 10 20 50 100 200 500 FIGURE E.2. 30 1 1 1 ') ' l l J 1 '1 'J 'l J THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 100 90 80 70 60 50 ~ 40 (.) § LIJ ~ 30 <( :r: (.) en i5 20 10 1.005 1.05 LEGEND: • OBSERVED DATA 0 ESTIMATED DATA e 95% CONFIDENCE LIMITS 1.25 2 5 RECURRENCE INTERVAL (YEARS) ANNUAL FLOOD FREQUENCY CURVE CHULITNA RIVER NEAR TALKEETNA SOURCE ' R 8t M 1981 1 1 -] l 10 20 50 100 200 500 FIGURE E.2. 3 I ) l 1 J l THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 1000 ijgg 700 -· 600 500 400 300 . ·-1 en 2oo li... u 8 0 UJ 100 (!) a: 90 <( ~8 ::r u (/) 0 60 50 40 30 _....-A ..--- v--£~ ~ ~ ... ~ 20 • ~ --l ---~ --l 1 ---- ~ /' / v / v _.,..~. y /"' ....... .r- ~ ........... ---............: • ~ ....... -----------_.-4 ....- ~ ,_. ____, ..- ___.-4 ~ 10 1.005 1.05 ' 1.25 2 5 10 20 50 100 200 500 LEGEND: • OBSERVED DATA 0 ESTIMATED DATA e 95% CONFIDENCE LIMITS SOURCE: R S M 1981 RECURRENCE INTERVAL(YEARS) ANNUAL FLOOD FREQUENCY CURVE TALKEETNA RIVER NEAR TALKEETNA FIGURE E.2.32 l ] l ) -, ) ] -.• THREE PARAMETER LOG NORMAL DISTRIBUTION WITH 95% CONFIDENCE LIMITS PARAMETERS ESTIMATED BY MAXIMUM LIKELIHOOD 100 90 80 70 60 50 (i) 40 1.1.. (.) § --w ~ 30 < :I: (.) fl) 0 20 10 1.005 1.05 LEGEND: • OBSERVED DATA 0 EST I MATED DATA e 95% CONFIDENCE LIMITS -------------1.25 2 5 RECURRENCE INTERVAL (YEARS) ANNUAL FLOOD FREQUENCY CURVE SKWENTNA RIVER NEAR SKWENTNA SOURCE' R S t.l 1981 -1 1 ] ---------L 10 20 50 100 200 500 FIGURE E.2.33 -····· -, l 0 1- <1: 0::: (/) (/) LJ.J ...J z Q (/) z LJ.J ::::!: Ci SOURCE• R!iM 1981 l l 7.0 I I I 6.0 5.0 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 / 4.0 3.0 2.0 1.0 0.9 0.8 0.7 0.6 0.5 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 ~/ 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 · PEAK BY THE DIMENSIONLESS CURVE RATIO FOR ,.,· v --. --f-- ........ THE RETURN PERIOD OF INTEREST. ~ ..-'\ COMPOSITE 95% ./ ..,., CONFIDENCE -~e ..-"' \ INTERVAL ..,.... \ /.....-::::~ ~ ........ \ ~-----~ \ ... .-~' \ -f.--~ ........... ---.....-...........-........ -.... --------./ ............ _, ......... 0.4 ./ " 0.3 1.005 1.05 1.25 2 5 10 20 50 100 200 500 IOPOO RECURRENCE INTERVAL(YEARS) DESIGN DIMENSIONLESS REGIONAL FREQUENCY CURVE ANNUAL INSTANTANEOUS FLOOD PEAKS FIGURE E.2 34 - ...... 180 165 -' 150 {""" 135 j 7 v 120 (/) u. 0 105 0 0 (!""' 2 J I v 90 w (!) c:: <( 75 ::r: 0 (/) Q 60 45 r 30 v I 1/ .~v " )1 ANNUAL----1 ~ 7 / v ~ / v ..... SUMMER v ~ 15 !"""" 0 1.005 2 5 10 20 50 100 1,000 10,000 RECURRENCE INTERVAL (YEARS} WATANA NATURAL FLOOD FREQUENCY CURVE FIGURE E.2. 35 - - -I - - - - 180 165 150 135 120 (f) LJ.. (.) 105 0 0 Q 90 w (!) a:: <r 75 :I: (.) (f) 0 60 45 30 15 0 i I I l I v 1/ J v _i v lL lL 1.005 2 5 10 20 50 100 ~000 10,000 RECURRENCE INTERVAL (YEARS) DEVIL CANYON NATURAL FLOOD FREQUENCY CURVE FIGURE E.2.36 - r- - (""" !"""' - - - 200r----------r----------+----------+----------+----------+----------~ Cl) LL u 120 0 0 0 / ' LJ..J I ' (!) I 0::: I I <( \ :I: 80 u \ ~ I \ c I \ I ' I / / 40 / , ,. .-...., ............... ___ ..... - LEGEND FLOOD VOLUME ( FT 3) 100 YR. 122.3 X 109 500YR. 178.2 X 109 ---IO,OOOYR. 269.2 X 109 -5 PEAK TIME (DAYS) PEAK DISCHARGE (CFS) 104,550 131,870 171,200 ' ' ' .... 5 SUSITNA RIVER AT GOLD CREEK FLOOD HYDROGRAPHS MAY -JULY SOURCE' R 8 M 1981 /-....... -- 10 15 FIGURE E.2.37, ,.... I r- ,..... ~ - - zoor---------~---------+----------r---------,_---------+----------1 160 (/) u. 0 0120 0 Q w (!) a: <X :I: 0 (/) o BO 40 ----- LEGEND: FLOOD VOLUME ( FT3) IOOYR 53.8 X 109 500YR 78.8 X 109 10,000 YR 119.5 X 109 PEAK DISCHARGE (CFS) 90,140 119,430 163,960 PEAK ' "\ TIME (DAYS) ' "\ ' 5 SU SITNA RIVER AT GOLD CREEK FLOOD HYDROGRAPHS AUG-OCT SOURCE: RaM 1981 10 15 FIGURE E. 2.38 lOS 105 105 105 lOS 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 " I' r-r-.... 2 2 2 2 2 .......... ' ['... 104 10 4 104 104 104 r--.. !'-.. -8 8 -8 -8 -8 f/) -... 6 f/) 6 f/) 6 f/) 6 f/) u ... ... ... ... 6 -£ u u u ....... --f-- 4 4 -4 -4 1\ -4 1&.1 1&.1 1&.1 1&.1 1&.1 ' -r, " (!) f'-... (!) (!) (!) ."' ~ -a:: a:: 2 1\.. a:: a:: ~-·, 1\ "" 2 -"" ~ 2 "" 2 "'-"" 2 X r--X "-...... X 1', 1---r-._ X 1', \ u 1' ... 1---r--u u I'-u u ~\ f/) r--f/) r---... t--f/) t--t--f/) 1-r--1---f/) 0 -f-.. r--0 r--0 !' .... r--t--0 r--0 ~ 103 103 103 10 3 -103 8 8 -8 8 8 6 -6 6 6 6 4 r--. r---... ... ·-' .... ' 4 4 4 4 --1---1---...... ' --·-:--. -.... ·-1--\ :-... ,_ ---1--. 2 2 2 -2 2 ..... ........ F~BR~AI I--I'-. ·--.... .... __ J~N~A~Y .......... y I'-• 1MA~cH1 . t-...... AP~IL ......... M~Y io2 102 102 102 102 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 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 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 105 105 105 los 8 8 8 8 8 6 ' 6 6 6 6 4 " 4 4 I\. 4 4 ·, ........ "-' " ..._ t-.... -~ 1---' = F== !--... r-' -r---" t-. -I---1---2 r'-... -r---... 2 ~---.... ~ 2 1\ I---2 ", ..._ 2 :--r-.... l\ ----r---t"-... r--r--"' ·-1'--·-." 1--t--to-....._ t---t--r--. \ r- -104 ... 104 104 :"'--104 • 104 . . f/) 8 -8 . -8 -8 -8 ... . f/) f/) f/) -f/) 6 ... 6 ... 6 ... 6 ... 6 £ -' ' -u u u £ 4 --\ -' -....... r-_ ·---K 4 4 ', 4 I". 4 ........... 1&.1 1&.1 1&.1 1&.1 -... -1&.1 --(!) \ (!) (!) \ (!) \ (!) a:: a:: a:: a:: ----a:: ', -'\ "" 2 "" 2 "" "" "" .... X X X 2 X 2 ·r...... X 2 . ....... u u u u u ....... _ f/) f/) f/) f/) f/) -'\, 0 10 3 i5 103 i5 103 i5 103 I'\ i5 103 -- 8 8 8 8 8 6 6 6 6 6 ... 4 4 4 4 4 2 2 2 2 2 102 JU 1NE 102 JU1LY 102 0 . 10 'ua1usr 102 SE1 PT~M~ER 102 0 1CT~~B~R 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 20 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 %.OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 105 lo5 8 8 8 6 6 6 4 4 4 ,\ J J ' J 2 2 2 \ 1"----NOTES : LEGEND : ~ ' f\ I. FLOW DURATION CURVES BASED ON MEAN GOLD CREEK -104 104 104 I' ]'. DA I LY FLOWS. CANTWELL ---- f/) 8 -8 -8 2 . PERIODS OF RECORD: DENALI ... f/) V) -·-- u 6 ... 6 ... 6 \ DENALI: MAY 1957-SEP1966, -" u u NOV 1968-SEP 1981 4 -4 -4 '\. \ \. 1&.1 r--l.IJ r\ 1&.1 CANTWELL: MAY 1961-SEP 1972 (!) r--1--(!) ...... (!) 1\ \ "' MAY 1980-SEP 198 1 a:: r-t--a:: 1--a:: "" 2 -"" 1---"" X r--... ['... X 2 -t--:I: 2 \ ......... GOLD CREEK : AUG 1949-SEP 1981 u t---u 1-I-t--r--u f', r-f/) ·-"' f/) 1--r-.. f/) i5 10 3 ........ i5 103 ·-. 0 103 1\ 1'. r--...... 8 8 8 MONTHLY AND ANNUAL 6 6 . 6 I' FLOW DURATION CURVES ·-·-' ' 4 -~ 4 . 4 SUSITNA RIVER NEAR DENALI r--. . ' ....... -... ,, SUSITNA RIVER NEAR CANTWELL 2 ' 2 ... 2 J N~VE~BfR D~CE 1M BfR ., ~N~UA~ .'\ SUSITNA RIVER AT GOLD CREEK 10 2 102 102 0 10 20 30 4 0 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 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGURE E .2 .39 l j l j J en .... (..) LIJ C> 0::: <1: :I: (..) en 0 10 6 8 6 4 2 10 5 ~ - 8 6 4 2 10 4 ........... r- 8 6 4 2 J~NUAR1Y . 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 ..._ 1--- -10 5 en 8 .... 6 ~ LIJ 4 C> 0::: <1: 2 :I: (..) en 0 10 4 8 6 4 2 JU 1 NE 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 .... (..) LIJ C> 0::: <1: :I: (..) U) 0 8 6 4 -"' 2 104 ~ ~ r--~ ...._ r-- 8 6 4 2 ~VE~B fR 103 0 10 20 30 40 50 60 70 80 90 100 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED en .... (..) LIJ C> 0::: <1: :I: (..) en 0 en .... (..) LIJ C> 0::: <1: :I: (..) en 0 en .... .(..) LIJ C> 0::: <( :I: (..) en 0 106 8 6 4 2 10 5 8 6 4 2 104 8 6 -4 2 F~BR 1UA ~Y 103 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 8 6 4 2 r--- 10 5 1-- 8 6 4 2 104 8 6 4 2 JU 1 LY . 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 8 6 4 2 10 4 "-.... ...._ ...._ r-- 8 6 4 2 D~CE ~BfR 103 0 10 20 30 4 0 50 60 70 80 90 100 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED en .... (..) LIJ C> 0::: ~ (..) en 0 en .... (..) LIJ C> 0::: <( :I: (..) en 0 en .... (..) LIJ C> 0::: <( :I: (..) en 0 106 8 6 4 2 105 8 ,6 4 2 104 8 6 4 2 1MA~CH1 3 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DI SCHARGE EQUALLED OR EXCEEDED 10 6 8 6 4 2 ' r- 10 5 r-- 8 6 4 2 10 4 8 6 4 2 'ue 1 usr 103 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 8 6 4 2 105 ' I'-- 8 6 '\. 4 \. 2 10 4 \ " 8 6 4 2 ~N ~UA~ 103 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED c;; .... (..) LIJ C> 0::: <1: :I: (..) en 0 en .... (..) LIJ C> 0::: <( :I: (..) en 0 . 106 8 6 4 2 10 5 8 6 4 2 104 " ~ 8 6 - 4 2 AP~IL _ 103 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 ' 8 6 -4 ........... .......... 2 10 4 8 6 4 2 SE1 PT~M~ER 103 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTES: I. FLOW DURATION CURVES BASED ON MEAN DAILY FLOWS. en .... (..) LIJ C> 0::: <1: :I: (..) en 0 en .... ~ LIJ C> 0::: <1: :I: (..) en 0 2 . PERIOD OF RECORD : OCTOBER 1974 -SEPTEMBER 1981. 106 8 6 4 2 10 5 ~ ..... 8 6 4 .... --r---' ' 2 1'\ \ 10 4 \ 8 6 4 2 M~Y 10 3 0 I 0 20 30 40 50 60 70 80 90 100 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED 10 6 8 6 4 2 10 5 8 6 4 ...... ~ - 2 10 4 r-r--.... 1\ 8 6 4 2 OC TOB~R I I 103 0 10 20 30 40 50 60 70 80 90 100 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED MONTH LY AND ANNUAL FLO W DURATIO N CURVES SUSITNA RIV ER AT SUSIT NA STAT ION FIGURE E .2 .40 l J l l J J J en ... 0 ... ~ c( ::r:: 0 en 0 10 4 8 6 4 2 10 3 8 6 4 2 10 2 I"-r-..... lo-. 8 6 ...... 4 ............ 2 J~NUA~Y I 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 ....... 4 ........ -1-- 2 -r-. 1'--..... !". ~ 10 3 ""' en 8 ... 6 ~ ... 4 Cl a:: c( 2 ::r:: 0 Cl) 0 102 8 6 4 2 JU 1NE 10 1 0 10 20 30 40 !50 60 70 80 90 100 'l(, -OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 2 ~ 10 3 en ... ~ w Cl 0:: c( ::r:: 0 en 0 8 6 4 ........... ......... 1'--. 2 10 2 r-. r-.... t"-. 8 6 4 2 N~VE~BfR I 10 0 10 20 30 40 !50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en ... 0 ... Cl 0:: c( ::r:: 0 en 0 en ... 0 ... Cl 0:: c( ::r:: 0 rn 0 en ... 0 LJJ C) 0:: c( ::r:: 0 en 0 10 4 8 6 4 2 10 3 8 6 4 2 10 2 r-........ 1'--. 8 6 ...... 4 ............ 2 Fl BR~A~Y 10 1 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 ...... 4 ......... ..... r-_ 2 :--t--.. ........ 10 3 8 6 4 2 10 2 8 6 4 2 JU 1 LY I 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 2 10 3 8 6 4 2 !'..... !'--- 10 2 -r--r-. r- 8 6 ....... 4 2 I D~CE 1MBfR 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en ... 0 ... Cl 0:: ~ 0 en 0 en ... 0 LJJ C) 0:: c( ::r:: ~ 0 Cl) ... 0 LJJ C) 0:: c( ::r:: ~ 0 10 4 8 6 4 2 10 3 8 6 4 2 10 2 t--8 6 4 r-.... 2 1MA~CH1 10 1 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 r-... r--.... ..... _ 2 10 3 ...... "~ 8 6 4 2 10 2 8 6 4 2 'ue 1 usr I 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 " "' ....... 2 '\ 10 3 1\. 8 6 4 \ \ 2 10 2 ~ I'-. 8 6 " 4 2 I ~N~UA~ 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en ... 0 LJJ C) 0:: c( ::r:: 0 en 0 en ... 0 LJJ C) 0:: c( ::r:: 0 en 0 10 4 8 6 4 2 10 3 8 6 4 2 10 2 1'--. r--..... r-.... 8 6 4 ~ 2 AP~IL 10 1 0 10 20 30 40 !50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 2 10 3 "' ' ........... ~ 8 6 ~ 4 --.:: ....... 2 10 2 8 6 4 2 SE1 PT~M~ER I 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTES = I. FLOW DURATION CURVES BASED ON MEAN DAILY FLOWS. en ... 0 ... ~ ~ ~ 0 en ... ~ LJJ C) 0:: c( ::r:: 0 en 0 10 4 8 6 4 1\ 2 10 3 \ ['._ !'.. 8 6 4 ....... ....... 2 ~ 10 2 I\ 8 6 4 2 M~Y 10 1 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 4 8 6 4 2 10 3 8 6 ...... 4 -I--r----.......... 2 "\ 10 2 8 6 4 2 0 1 CTC 1 B~R I 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 2. PERIOD OF RECORD=JUNE 1958-SEPTEMBER 1981. MONTHLY AND ANNUAL FLOW DURATION CURVES MACLAREN RIVER AT PAXSON FIGURE E.2.41 J J U) 1&. 0 a..J (!) 0:: ct :r 0 U) i5 105 8 6 4 2 104 8 6 4 2 ... 103 -t-- 8 6 - 4 2 J~NUA~Y io 2 o 10 20 30 40 50 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 'I'--. 2 ', ...._ r--~', -r-.... ..... -104 1---r-..... t.... U) 1&. ~ a..J (!) 0:: ct :r 0 U) i5 8 6 4 2 103 8 6 4 2 JU 1 NE 102 0 10 20 30 40 50 60 70 80 90 100 %-OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 -104 U) 1&. ~ a..J (!) 0:: ct :r 0 U) i5 8 6 4 ~"'-- 2 t' ...... r-. t-.. ....... -!--t-- 103 ...... --r-- 8 6 4 2 ~VE~BfR 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED U) 1&. ~ a..J (!) 0:: ct :r 0 U) 0 U) 1&. 0 a..J (!) 0:: ct :r 0 U) 0 U) 1&. -0 a..J (!) 0:: ct :r 0 U) 0 105 8 6 4 2 10 4 8 6 4 2 r---..... 103 r-- 8 6 - 4 ~""'"- 2 F~BR~A~Y 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 ~', 1--r--.... ' ..., "\ -8 6 -... 4 2 103 8 6 4 2 JU1LY 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 8 6 4 2 10 3 8 6 4 2 r....... r.... .. --r-1--. ~"---- 1- ~CE~BfR 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED U) 1&. 0 a..J (!) 0:: ~ 0 U) i5 U) 1&. 0 a..J (!) 0:: ct :r 0 U) 0 U) 1&. 0 a..J (!) 0:: ct :r 0 U) i5 105 8 6 4 2 104 8 6 4 2 103 r-r-~ 8 6 1---4 -.. 2 1MA~CH1 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 ....... \ --i"-"-2 10 4 8 ·, -~""--'· ~--~ 6 4 \ 2 \ 103 8 6 4 2 'ue1usr 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 8 6 4 2 103 8 6 4 2 I' 1'. \ 1\ --t-- 1\ ' ' '\. ' ... I'-" ... r-...... !'-... r-... .. ~N~UA~ 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED U) 1&. 0 a..J (!) 0:: ct :r 0 U) 0 U) 1&. 0 a..J (!) 0:: ct :r 0 U) 0 105 8 6 4 2 104 8 6 4 2 10 3 l\ 1\' r--r--t--' r--!'-- 8 6 --4 ...... 2 AP~LL 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 5 8 6 4 --. 2 104 1\:: ~', r-...... r-!--' r-.... 8 6 -~ -4 -~ 2 10 3 8 6 4 2 SE 1 PTI M~ER 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTES: I. FLOW DURATION CURVES BASED ON MEAN DAILY FLOWS . 2. PERIODS OF RECORD: CHULITNA RIVER NEAR TALKEETNA: FEBRUARY 1958-SEPTEMBER 1972 MAY 1980-SEPTEMBER 1981 TALKEETNA RIVER NEAR TALKEETNA: JUNE 1964-SEPTEMBER 1981 U) 1&. 0 a..J ~ ct :r 0 U) 0 U) 1&. ~ a..J (!) 0:: ct :I: 0 U) 0 105 8 6 4 2 10 4 ['.._ 1', ~"'--r-...... r-... 8 6 ...... --I--- 4 -.... ' 2 10 3 ..... !'-['.... ....... 1'\ -, 8 6 4 2 M~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 1'-.. 8 6 . .... 4 "' -...... I' -.._ 2 --r-...... r-..... -.. .... - 103 r--.. 8 6 4 2 0 1 CTI 1 B~R 2 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED LEGEND: CHULITNA RIVER ----TALKEETNA RIVER MONTHLY AND ANNUAL FLOW DURATION CURVES CHULITNA RIVER TALKEETNA RIVER NEAR TALKEETNA NEAR TALKEETNA FIGURE E.2 .42 - 4 3 2 (f) IL 0 0 0 Q l ~ 0.9 (!) a: 0.8 ~ .... :J: 0 0.7 (/) Q 0.6 -0.5 0.4 - 0.3 ~ 0.2 - - - 1.05 l.l 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES JANUARY 20 50 FIGURE E.2.43 - - - ?""" -! (/) LL. 0 I'""' 0 0 0 LLJ (!) -Q:: <1: :I: 0 (/) 0 I'""' - - 4 3 2 I 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 I, 3,7 AND 15-DAY HIGH FLOW 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE; PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES FEBRUARY 20 50 FIGURE E.2.44 - - -< ,- - - (/) LL (.) 0 4 g I :0.9 ~ 0.8 <( ~ 0.7 (/) 0 0.6 0.5 0.4 0.3 0.2 I, 3, 7 AND 15-DAY HIGH FLOW 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS ) NOTE: PERIOD OF RECORD WY 1950 -WY 1981. AT FREQUENCY MARCH GOLD CREEK SUSITNA RIVER HIGH-FLOW CURVES 20 50 FIGURE E.2.45 - /""'< 4 !""" 3 0.2 - 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981 SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES APRIL 20 50 FIGURE E.2.46 - 100 r I 50 -I 40 -en 1L 30 u 0 0 -0 LLJ (!) a:: 20 <( ,-~ u en 15 Ci ,.... 10 9 r- 5 - - - - 1-DAY HIGH FLOW 3-DAY HIGH FLOW 1.05 1.1 2 5 RECURRENCE .INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES MAY 10 20 50 FIGURE E.2.4 7 - 100 ,.... ' 50 r If) LL. 40 u 0 ~ 0 0 -30 ~ w (!) 0::: <( ,_ ::c u If) 0 20 r 15 10 - - - 1-DAY HIGH FLOW 3-DAY HIGH FLOW 1.05 1.1 2 5 RECURRENCE lNTERVAL(YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES JUNE 10 20 50 FIGURE E.2.48 r-. 70 60 r-50 40 -!' 30 ,,-. 20 ,..... -en IJ... () 0 10 0 r""' 0 - w (!) 0::: <( 100 J: 90 () ~ 0 80 70 60 50 t- 40 30 ,.... I 20 - 10 --- - - I-DAY HIGH FLOW 7-DAY HIGH FLOW 15-DAY HIGH FLOW JULY I-DAY HIGH FLOW 3-DAY HIGH FLOW AUGUST 1.02 1.05 2 5 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981 SUSITNA RIVER AT GOLD CREEK HIGH-FLON FREQUENCY CURVES JULY AND AUGUST 20 50 FIGURE E. 2. 49 40 ·- 30 (/) 1.J... 20 u 0 0 Q IJJ (.!:) 0:: <t I u 10 (/) -0 9 8 7 6 5 20 (/) r-1.J... 1 u 10 0 0 9 Q 8 IJJ 7 (.!:) 0:: <t I 6 r u (/) 0 5 r 4 3 SEPTEMBER 1.02 1.25 2 5 RECURRENCE INTERVAL(YEARS) OCTOBER" 1.03 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES SEPTEMBER AND OCTOBER 20 50 20 50 FIGURE E.2.50 7 -6 5 4 -3 2 (/) LL u 0 0 Q w (!) a: <( :I: 0.9 u ~ 0.8 -0 0.7 0.6 r 0.5 r 0.4 0.3 ,...., 0.2 7-DAY HIGH FLOW 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE~ PERIOD OF RECORD WY 1950 -WY 1981. GOLD CREEK CURVES SUSITNA RIVER AT HIGH-FLOW FREQUENCY NOVEMBER 20 50 FIGURE E.2.51 - - -' - en LL (.) 0 0 0 w 5 4 3 2 ~ 0.9 ~ 0.8 (.) ~07 0 . 0.6 0.5 0.4 0.3 0.2 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK HIGH-FLOW FREQUENCY CURVES DECEMBER 20 50 FIGURE E.2. 52 - f"" I , __ I 4 3 0.2 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES JANUARY 20 50 FIGURE E.2.53 r -3 -2 ,_ (J') IL.. (.) ,-0 0 0 I ~ 09 w . fi 0.8 ~ ~ 0.7 (.) (J') 0 0.6 -0.5 -0.4 0.3 ,_ 0.2 - 1,3,7 AND 14-DAY LOW FLOW 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES FEBRUARY 20 50 FIGURE E.2. 54 - ,_. ~ - .- - !"""' -' - (f) LL. u 0 0 2 LLI (.!) a::: <( I u (f) 0 4 3 2 I 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 I, 3, 7 AND 14-DAY LOW FLOW 1.05 I .I 2 5 10 RECURRENCE INTERVAL ( YEARS) NOTE· PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES MARCH 20 50 FIGURE E. 2. 55 - - !"""' I -I r - - - (/) u. (.) 0 0 0 3 2 ~ 0.9 ~ 0.8 <1: i3 0. 7 (/) Cl 0.6 0.5 0.4 0.3 0.2 1.05 I. I 2 5 RECURRENCE INTERVAL ( YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES APRIL 10 20 50 FIGURE E.2. 56 - ,- - - 10 9 8 u; 7 u. u 6 0 0 Q 5 w (!) a:: 4 <( :I: u en c 3 2 ?-DAY LOW FLOW 14-DAY LOW FLOW 3-DAY LOW FLOW 1.05 1.1 2 5 RECURRENCE INTERVAL .(YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES MAY 10 20 50 FIGURE E.2.57 I""' ' ' - - - (/) LL. u 0 0 0 ILl <D a: < ::t: u (/) 0 50 40 30 20 10 9 8 7 6 5 1.05 1.1 2 5 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950 -WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES JUNE 10 20 50 FIGURE E.2 .58 - 40 - 30 - 20 15 10 Ul "'-u 0 0 0 40 LU (!) a:: 30 <( :I: u Ul 0 20 - 10 ,..... 9 8 7 6 5 ~~ AUGUST 3-DAY LOW FLOW 1.05 1.1 2 5 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES JULY AND AUGUST 10 20 50 FIGURE E.2.59 20 15 10 9 8 7 6 5 !""" 4 (/) LL. u 0 0 0 IJJ (!) a: 7 <( !"-:I: u 6 (/) 0 5 .- 4 .- 3 ,... 2 SEPTEMBER OCTOBER 1.05 1.1 2 5 RECURRENCE INTERVAL (YEARS) NOTE: PERIOD OF RECORD WY 1950-WY 1981 SUS ITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES SEPTEMBER AND OCTOBER 10 20 50 FIGURE E.2.60 - - -4 3 r- 2 - en LL. u -0 0 Q I 0.9 LLI .... (!) a:: 0.8 <t :c 0.7 u en c 0.6 r- 0.5 .... 0.4 0.3 - -0.2 r I ..... L.y LOW FLOW 1.05 1.1 2 5 10 RECURRENCE INTERVAL (YEARS) NOTE: PERTOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES NOVEMBER 20 50 FIGURE E.2. 6 I - 3 2 I, 3, 7 AND 14-DAY LCNI FLOW ~ (/) LL (.) 0 0 I 0 - ~ 0.9 I.J.I 0.8 (!) a: <( 0.7 :I: (.) (/) 0.6 Ci !""" 0.5 0.4 0.3 0.2 ..... 1.05 1.1 2 5 10 20 50 RECURRENCE INTERVAL ( YEARS ) r NOTE: PERIOD OF RECORD WY 1950-WY 1981. SUSITNA RIVER AT GOLD CREEK LOW-FLOW FREQUENCY CURVES DECEMBER FIGURE E.2.62 • ~ 0 h A • Ia. !::,. u !::,. A !::,. J 2.00 126 128 LEGEND: GOLD CREEK FLOW , • 23,400 CFS 0 17,000 CFS A 13,400 CFS !::,. 9,700 CFS • 0 ... • [] A !::,. !::,. • 0 A !::,. 130 • 0 A !::,. z <t :::E a:: w I (/) • 0 A !::,. • n A !::,. • 0 • A • 0 !::,. o• • A !::,. • Ao n -A 61!.. 0 !::,. !::,. • A 0 • • 0 • !::,. A 0 A 0 !::,. 0 A A A !::,. !::,. L), !::,. 132 134 136 o~wz ...JWC90 ow<r- (90::C9t:{ (,) f." (/) • WATER DEPTHS AT RIVER MILE 150.2: -• 24 .13 FEET 0 22 .88 FEET 0 A 2 1.95 FEET 0 !::,. 20 .68 FEET A A !::,. • • • !::,. - 0 -n 0 u A A -A A • • 0 0 • • !::,. 0 !::,. !::,. !::,. A A !::,. • A 0 0 0 • • ... !::,. AC;, • A • 0 0 n A !::,. A !::,. !::,. A 0 u C;, ~ A !::,. A !::,. !::,. 138 140 142 144 14 6 148 150 152 154 za:: RIVER MILE ~ z <rw w 0 -> w >-0_ a:: z za:: (,) <t (,) w (.!) __J <t > f-a:: w 0 0 a.. l l l I- IJJ IJJ I u. :I: I- 0.. IJJ 0 0::: IJJ I- <l ~ J 18 .00 17.00 16 .00 15 .00 14.00 13 .00 12 .00 liDO 10.00 9 .00 8.00 7 .00 6 .00 5 .00 4.00 3 .00 2 .00 <l z 1--w w :.:: ...J ~ I • 0 .& !::. • ~ • h 0 1.& 0 ~ .& !::. !::. 98 100 LEGEND : GOLD CREEK FLOW : • 23,400 CFS 0 17,000 CFS .& 13,400 C F S t::. 9,700 CFS • 0 .& !::. • 0 .& • !::. 0 .& D. • .& !::. 10 2 104 106 NOTE: WATER DEPTHS COMPUTED BY U.S. ARMY CORPS OF ENGINEERS H EC -n COMPUTER PROGRAM . -- 0 .& !::. • n .& !::. • • 0 0 • .& • • .& !::. 0 • 0 0 .& !::. 0 ... .& !::. .& !::. 108 110 112 IJJ ~ RIVER MILE :I: u MAINSTEM WATER DEPTHS RM 126 TO TALKEETNA • 0 ... !::. • 0 .& D. 114 116 • 0.. .& 0 t:!- !::. 118 120 • 0 ... !::. >- 0::: 0::: :::J u • 0 -a !::. • 0 .& !::. • ~ .& I • A -r ... 0 0 .& L .& !::. !::. 122 124 126 FIGURE E . 2. 6 4 ....... 1- ~ ~ u. z 0 ~ > ~ ...J ~ 594 593 592 591 590 589 588 587 l l 1 WSEL= 594.1 1"MAINSTEM = 32,500 CFS ADF8 G STAFF GAGE --- 4.0 PASSAGE -+,._--.t REACH A -5t00 WSEL= 592.15 rMAINSTEM = 22,500 CFS WSEL AUG 24, 1982 = 590.00 MAINSTEM = 12,500 CFS SLOUGH = 3 CFS 0+00 (MOUTH) --1 5+00 NOTES: DISTANCE {FEET) I. MOUTH OF SLOUGH AT STATION 0+00. 2. SELECT MAINSTEM DISCHARGES MEASURED AT GOLD CREEK. BACKWATER PROFILES AT THE MOUTH OF SLOUGH 9 SOURCE: TRIHEY 1982 l l 10+00 FIGURE E.2.65 - - -I ' - - - 594.0 ·; f-v 1-w w II.. 01 593.0 :I: (.!) ::1 g (/) f-I ,... v II.. 0 :I: 1- ::1 0 ~ 111 :I: 592.0 1- ti z f-I 1-I 0 1-~ 111 _J 111 111 (.) ~ 591.0 a:: ::1 (/) a:: 111 ~ J f-I I-v 3: f-I I 1-I 590.0 I I 589.5 10 15 20 25 30 35 MAINSTEM DISCHARGE AT GOLD CREEK (1000 CFS) OBSERVED WATER SURFACE ELEVATIONS AT MOUTH OF SLOUGH 9 FOR ASSOCIATED MAINSTEM DISCHARGES AT GOLD CREEK DATA SOURCE' ADF a G 1982 40 FIGURE E.2.66 14 13 12 II 10 -9 u 0 -8 w a: ::> 7 l--<t a: 6 w a.. ~ 5 w ._ 4 3 2 l II f • II I' I , I I I ~ I I • • I~ 1 I I I I I I I I I I ~ r I I I I f I 'I i\ I I ~ f I W I I I I I I ·~ I I f I I If I 1 l : • I I I I + ~ \I ~ " II I ,I II I ~ ~ f I I J 1 l l 1 l • • • J • 1 l LEGEND: -....... -OAIL Y AVERAGE AT DENALI ~ DAILY AVERAGEATVEECANYON A DAILY AVERAGE AT SUSITNA STATION (SELECTED DATES) 0~--~--~--~~--~----r-~~--~--+---r---+---+---+---+---+---r-~--~-- MAY JUNE DATA SOURCE 'USGS JULY AUGUST SEP. SUSITNA RIVER WATER TEMPERATURES SUMMER 1980 OCT. FIGURE E.2.67 ... ) 14 13 12 II 10 9 (.) 8 ~ UJ a:: 7 ::J ..... <l a:: 6 IJ.J a.. ::E 5 IJ.J ..... 4 3 2 MAY DATA SOURCE' USGS AND R& M 1 JUNE l l JULY AUG. SEP. SUSITNA RIVER WATER TEMPERATURES SUMMER 1981 1 LEGEND: _ _.-DAILY AVERAGE AT DENALI _._ DAILY AVERAGE AT WATANA FIGURE E.2 .68 l -1 -) l l 12 1----------t--- tor--~r---r---r---r---+---+--~ LEGEND: 8 WEEKLY AVERAGE TEMPERATURE u 8 (::rrr::t:il ~~~1~~piN°ri :,~1~~y 0 1&1 a:: ~ sr--~r---r---r---r---+---+---+---+- 4 a:: 1&1 11. 2 ~ 4r--~~-~r---r---1----+----+---+--~ 2r---r---r---r---+---+---+---+-- 0 4 8 12 16 20 24 28 32 WEEK OCT. NOV. DEC. JAN. FEB. MAR. APR. MAY MONTH SUSITNA RIVER AT WATANA l 36 40 JUN. JUL. WEEKLY AVERAGE WATER TEMPERATURE 1981 WATER YEAR ) l 44 48 52 AUG. SEP. FIGURE E.2.69 - - - - - - - r u 0 ::::------------a: ~ UJ I- 15 (.) 0 0.: ~ UJ I- --------- LEGEND ----MAXIMUM ----MEAN -------MINIMUM =:------- NOTES 15 (.) 0 0.: ~ UJ I- (.) 0 0.: :::!!; UJ I- (.) 0 0.: :::!!; UJ I- -------------------------::---- ~-~------=:---_=-------~ ----~ 1.) ALL TEMPERATURES WERE RECORDED BY THE USGS WITH SINGLE THERMOGRAPHS AT EACH SITE. 2.)GOLD CREEK'S TEMPERATURES WERE 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 l I . A,______. 15.0 I.A.~I3.0 10.0 0 e.. w 0: :::> ~ 0: w 11. 5.0 :IE w ~ 0.0 49 49 "54 21 65 9 25 3 5 D v G c T s ss D v SUMMER 17 5 27 3 22 6 4 G c T 5 ss D v WINTER 1 1 10 2 12 I G c T s BREAKUP ' ~- 7 ss l e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION SOURCE 'USGS NOTES: I. A. CRITERIA: SHALL NOT EXCEED 20°C AT ANY TIME. THE FOLLOWING MAXIMUM TEMPERATURE SHALL NOT BE EXCEEDED WHERE APPLICABLE: MIGRATION ROUTES AND REARING AREAS--15°C, SPAWNING AREAS AND EGG AND FRY INCUBATION--13°C (ADEC,I979). I. B .. ESTABLISHED TO PROTECT SENSITIVE IMPORTANT FISH SPECIESr.AND FOR THE SUCCESSFUL MIGRATION...zSPAWNING,~. EGG-INCuBATION,_FRY-REARING..J AND OTHER REI"'RODUCTIVt. FUNCTIONS OF IMPORTANT SPt.CIES. 2. MAXIMUM VALUES OF I2°C AT DENALI ON JUNE 4 AND 5, 1980; 15.0 0C AT GOLD CREEK ON .JULY 3 AND 4, 1979 i AND 16.5 °C AT SUSITNA STATION ON .JULY 9,1976 HAVE BEEN RECORDED BY USGS CONTINUOUS RECORDING EQUIPMENT, 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. DATA SUMMARY-TEMPERATURE FIGURE E.2.71 - - MATCH LINE .,I DEVIL CANYON : FOURTH OF JULY CREEK RM 130 DIRECTION OF FLOW SOURCE, TRIHEY 1982 SHERMAN CREEK 9 SLOUGH 9 D. o• SLOUGH 8A \7 9 INSTRUMENT LEGEND: RYAN SURFACE - --0 RYAN INTERGRAVEL--• DATAPOD SURFACE - -Q DATAPOD INTERGRAVEL-• ~~ 10 RIVER MILES SLOUGH 219 eo o• hiRECTION t OF FLOW \79 09 oe ---L-___._..._M=ATCH LINE YSI SURFACE--\7 .YSI INTERGRAVEL-9 NOTE: RM =RIVER MILE LOCATION MAP FOR 1982 MIDWINTER TEMPERATURE STUDY SITES FIGURE E.2.72 - ,.... I ! r ' - - f""' I SLOUGH 21 SUSITNA RIVER AT PORTAGE CREEK (RM 142) (RM 149) 10 I I I I I I I 10 I I I I I I ~8 o8 -i""'"""ooo. ~ a.: / "' a.: 1- ::E ::E WS WS 1-v ........ 1- r-- 4 I I I I I I I I 4 I I I I I I I 400 1000 ISOO 2200 400 1000 ISOO 2200 TIME TIME AUG 31-SEP S AUG 31-SEP S I I I 8 8 -r---._ ~ ~ u r-/ ~ -u -- 0 0 ~s ./ ........ r-_ -;;::s ::E ::E w w r-- 1-1- 4 4 I I I I I 400 1000 ISOO 2200 400 1000 ISOO 22.00 TIME ' TIME SEP 7-13 SEP 7-13 I I I I I I I I I I 8 8 ~ ~ "' -~ -- / a.:S ./ ' ~s ::E --::E w w -- 1-1- 4 4 I I I 400 1000 ISOO 2200 400 1000 ISOO 2200 TIME TIME SEP 14-20 SEP 14-20 8 I I I I I 8 I I I I 1--1--- ~ us ~ us ~ / ~ tL -a.: -- ::E -~4 -~4 1--- 2 I I I I I I 2 I I I I I I I 400 1000 ISOO 2200 400 1000 1600 2200 TIME TIME SEP 21-27 SEP 21-27 COMPARISON OF WEEKLY DIEL SURFACE WATER TEMPERATURE VARIATIONS IN SLOUGH 21 AND THE MAINSTREAM SUSITNA RIVER AT PORTAGE CREEK 1981 FIGURE E.2. 73 SOURCE: ADAPTED FROM AOF a G 1981 15 14 13 12 II 10 9 ~8 w a: ::I 7 f- <l: a: w a.. 6 :!: w f- 5 4 3 2 ·~··· J ~ rv \ I",.--\., \.-JV, .v: , I I " \ I . I I I I I 'I ) \ f ,.. _, \1 , .... l l LEGEND: . l SUSITNA RIVER DAILY AVERAGE TEMPERATURE, RM 126.1 (BASED ON PRELIMINARY DATA FROM ADFaG) -•-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 ) 0 ~------~-------L------~--------~------~--------~------~--------~------~~------~------~------~ 10 20 JUNE 30 10 20 31 10 20 3/ JULY AUGUST SUSITNA RIVER, PORTAGE CREEK AND INDIAN RIVER WATER TEMPERATURES SUMMER 1982 10 20 30 SEPTEMBER FIGURE E.2.74 u ~ w a:: ::::l 1- <{ a:: w a.. ~ w 1- SOURCE : ADF 8 G 1982 15 I I I ,, A /\ 13~----~----~~~,-.--+--~,.~,~. -----4-,~~~.,--4-----4-----~----~-----r-----r-----J-----i \ I ~ I \ I \ . \ ;·\ ill'.\ I~ r·--..... SUSITNA RIVER ABOVE CONFLUI:NcE 9 7 ~~ ' v .. '. . I \ . , / \ i \ i \ I I ' \! ' /\/ \! \I SUSITN ~I RIVER ~~ \ • I ;, . \/ ) r'\ BELOW ~oNFLUENCE 1 \ ·._. \ • \ f"·. '·../ I \_ : ~_/ I ,. \_I .. /··, .. , \/ .i \ ,.·"\~ • \ ··',""'' v . \ \," ...... ~ \ " I -~~ \ ' I \ I \ J • ··~ ...... / \ /;' ''-\. ,' TALKEETN RIVER ABOVE ~ONFLUENCE~ \. j j .. ,, : 1\.. \ /,..\ I \ /f ', ',,I/ --1----\~ sus~~IA RIVER ~\·.. :.~ r·\ V/ ' 11:.---BELO'If CONFLUENCE '··r·':, . · 1~ 11 .·"·. 1: ' ----~NO DATA , \..) r ,_ ----"' ,.~ ~ .\ ' 1 ~. r \ : ' --~ I ' \ I .. \ • \ I ' --'f ':\ \ I ,. '·· I '-.. · "--- -\ \ .., ··,.. . .,__ ..... '--J : \ : v _------\ A \ . .,/ '"·· I '..., 5 v -v 'V \.; 3 ~------~--------~-------+--------+--------+--------+--------+--------+--------t--------1-------~--------j--------. I I e 16 24 2 10 18 26 3 II 19 JUNE JULY AUGUST NOTES: MONTH I) Tl ME 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 1982 TALKEETNA, CHULITNA, AND SUSITNA RIVER WATER TEMPERATURES I 27 4 LEGEND: 12 SEPTEMBER 20 -·-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 - ..... ,..., i - ,..., """' - - - - .... - - .... ' I 20 }' / / / / 16 / / v / / II I / , 18 1-w w La... (!) w / rf ~ ...J <t :r: 14 1- / w ~ ID <t 0 z 0 !<{ > 12 w ...J w v ...J X' w > w ...J 0 0 a:: w 1- <t 10 ~ 8 6 0 10 20 30 40 50 DISCHARGE ( 1000 CFS) LEGEND: X FIELD MEASUREMENT OCT. 7, 1980 (RaM 1982 d). 0 FIELD MEASUREMENTS ADFSG 1982. -HEC-2 COMPUTED RATING CURVE. FIELD MEASLIREMENT DEC. 3, 1980 [] DURING ICE COVER PROGRESSION ( RS.M 1982d) . HYPOTHETICAL ICE COVER RATING CLIRVE WITH FREEZEUP AT DEC. 1980 DISCHARGE. NOTE: ICE COVER RATING CURVE IS AN ILLUSTRATION ONLY AND IS NOT INTENDED TO REFI,..ECT ACTUAL CONDITIONS. ICE AND OPEN WATER STAGE - DISCHARGE RELATIONSHIP, LRX-9, RM 103.2 FIGURE E.2. 76 -1 1 ---] J 1 l MEDIUM GRAVEL COARSE GRAVEL VERY COARSE GRAVEL SMALL COBBLES LARGE COBBLES 40 Cf) lL (.) 8 g 30 w CROSS-SECTION D16 D5o De4 t!l ~ (MM) (MM) a:: <[ LRX-26 25 54 113 :J: LRX-27 19 43 100 (.) Cf) LRX-28 13 31 68 0 LRX-29 32 59 110 20 LRX-30 33 64 122 LRX-31 28 49 84 LRX-32 19 43 100 0~--------L---------L---------~---------L--------~--------~----------~--------~------~ 0 20 40 60 80 100 120 140 160 180 MEDIAN DIAMETER OF BED MATERIAL MOVED (MM) SOURCE' R 8 M 1!182 BED MATERIAL MOVEMENT CURVES LRX-28, 29,31, 35 FIGURE E.2. 77 l ) J l l ~--·) -l ) 6000 ....... do .! 4000 (/) 1-z ILl 2 2i ILl en 0 ILl 2000 0 z ILl ll. en ;:) (/) ...J l"' g 1-0 ' 45 46 72 20 54 5 21 2 ~ 16 6 24 2 19 8 3 15 3 12 I 5 D v G c T s S.:t D v G c T s ss D v G c T s ss SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTE: I. A. CRITERION: NO MEASURABLE INCREASE ABOVE NATURAL CONDITIONS (ADEC 1979). I. B. ESTABLISHED TO PREVENT DELETERIOUS EFFECTS ON AQUATIC ANIMAL 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 R ~M 1 e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 78 (/) ..... (.) 0 0 0 - UJ (!) a::: <t ::r: u (/) 0 50 40 30 20 10 9 8 7 6 5 4 3 2 l ) ~ ~ ~ ~ l ...... ......... ~ ...... ,... .......... ....... / y V""'..,....... ......... ~ ...... ,.,.,. ...... / .............. ......... ,.,.,. / .......... ,.......... ~ ~ ...... ..... l l J ...... / ... ...,.../ v v .............. ............ ~ ~ ............ ~ / !--"' ...... ... !--....... v r' ~ ,. .. / ..,.. SUSITNA RIVER AT ,.,.,.,. ............... !--"' / ~ ...... / ~ SUSITNA RIVER GOLD CREEK y ~,.......,... ......... ......... / NEAR DENALI / / ~:;;NA RIVER . ,....,.. v ,.,.,. v NEAR CANTWELL / (VEE CANYON! / ............. ... ... ...... v ... ~- ~ .... "' ~ """' ..,...., / ,.-~MACLAREN RIVER ....... NEAR PAXSON ~ 1,000 2 3 4 5 6 7 8 9 10,000 2 3 4 5 6 7 8 9 100,000 2 3 4 567891 SOURCE • R 8 M 1982 SUSPENDED SEDIMENT DISCHARGE (TONS I DAY) SUSPENDED SEDIMENT RATING CURVES MIDDLE AND UPPER SUSITNA RIVER BASINS FIGURE E.2. 79 l LLJ !::::! (f) 0 LLJ 5 0 ~ z <l :r: I- 0:: LLJ z G: I-z LLJ u 0:: LLJ tl. 99.9 99.8 99.5 99 98 95 90 80 70 60 50 40 30 20 10 5 2 I 0.5 0.2 0.1 ) 0.001 l - E SOURCE: ALASKA DISTRICT CORPS OF ENGINEERS 1975 -1 ' LEGEND: -----SUSITNA NEAR DENALI ------SUSITNA NEAR CANTWELL SUSITNA AT GOLD CREEK -----MACLAREN NEAR PAXSON / ,... ,....I--' ~~ In / v ............ "'-' ...... ....c ~ ~-t;:: ~ ~ -:; ... -:-~ --:;;.(_ ~ ..c. tr::;::ll ~~ ... ~ ..... ;;.... ;I! f:-"' ~ ,_.. c .. ,_. ~ ... ;;... -_ ..... 0.01 0.1 PARTICLE SIZE (MILLIMETERS) SUSPENDED SEDIMENT SIZE ANALYSIS SUSITNA RIVER ~ v ~ / ~~ v v: 7 I# v 1.0 FIGURE E.2. 80 -J l } J J l } _II ~~b 1500 ..-1000 ::> ~ z >-1- 0 iii 0:: 500 ::> 1- 0 t- ~ 0 18 27 13 15 21 18 0 4 !5 0 0 3 13 0 I 3 0 0 0 5 f- D v G c T s ss D v G c T s ss 0 v G c T s ss f- SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA 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 e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.81 J - - - - - - - 200~--------~-----r--~---r--.---~--.---------~-----r--~---r--r---~-; Ill/ 150~--------1------r--~---r~~--+-~~--------1------r--~---r~~--~~ 0~ J00~-------+----~--~~~+---+--+------~~----4~~A~+--4~~~--~~~ 0 / X aor---------~-----+--~---r--r---+---r----------r-----+--_,~-+--r---4-~ 0 &/ 6or---------4------+--~---r--r---+---r----------r-----+~_,---+--r---4-~ / v Ill 40r---------4------r---T---r~r---+-~-------=~,/~----r---4---r--r---+--~ / ~ 30~--------4------+---1--~--r---+---~----~~~-----+--_,---+--r---4-~ /8 ~20~--------1------r--~---r~~--+-~~--------1------r--~---r--~--+-~ ~ x /v NOTES: I T = 0.185(SC)O.SS8 ~ LV Q: r 2= 0.92 T= TURBIDITY ~ I0~--------4------r---4--~~~L~---+--~--------_, &/7 SC =SUSPENDED SEDIMENT CONCENTRATION ar---------4-----~---+~~~~--+-~,---------4------+---1---+--~--+-~ /v 6~--------1------r~~---r~~--+-~----------1------r--~---r--~--+-~ /v 4~--------1-~---r--~---r~~--+-~~--------1------r--~---r--~--+-~ /v 3/ 2r~~-------1------r---+---~~---+---rLEGEND: L:) -SUSITNA RIVER NEAR CANTWELL 0 -SUSITNA. RIVER NEAR CHASE X -SUSITNA RIVER AT GOLD CREEK ~~~~~~~--~l~l~l~J~~. 10 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.2.82 l l ... 1 . ~-1 ) l 15.8 14.0 ' 12.0 -....... 0. E z w (!) >-X 0 Cl 10.0 Lr.J ~ 4 . 0 IJ) IJ) 0 8.0 I.A._____. 0 7 19 0 29 5 13 0 4 8 0 15 3 14 0 I 3 0 4 0 4 D v G c T s ss D v G c T s ss D V· G c T s ss SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I. A. CRITERIA: GREATER THAN 7mg./l. ,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 SOURCE: USGS AND RaM .... 1 e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.83 I.A. z 0 1- <( a:: ;:) ~ en ~ 0 z UJ (.!) >- X 0 Cl UJ ~ 0 en en 0 .... ] -l 120 100 I 80 60 - '~ ~ 0 7 15 0 8 2 9 0 4 8 0 6 3 7 0 I 3 0 I 0 2 D v G c T s ss D v G c T s ss D v G c T s ss SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I. A. CRITERION: THE CONCENTRATION OF TOTAL DISSOLVED GAS SHALL NOT EXCEED 110% SATURATION AT ANY POINT.lADEC,I979). I. B. ESTABLISHED FOR THE PROTECTION OF ANADROMOUS AND RESIDENT FISH. DATA SUMMARY-DISSOLVED OXYGEN °/o SATURATION SOURCE' USGS AND R8 M e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E. 2. 84 I z 0 ~ 0::: :::> ~ en 1-z LLI (.) 0::: LLI Q. ~ en '"' (!) c LLI ~ en en 0 ...J ~ 0 1-1 ) J J -~ l 1 1 J -] J ----~ 1 jJ J 115 .---.----.----.---.----.---.----.----.---.----.----.---.----.----.---.----.----.---.----.--r-,---.----.---~ I 110 ~ • • • • • • • • ~ • • I • • • • • • • • • • •• • • • • • • • ~ • (o/o SAT) =105.8 t 0.251 (DISCHARGE) 1000 • •• • • • 105 ~--~--~--~----~--~--~----~--~--~----~--~--~----~--~--~----~--~--~----~--~--------~---10 15 20 DISCHARGE (1000 cfs) 25 TOTAL DISSOLVED GAS (PERCENT SATURATION) VS. DISCHARGE 30 FIGURE E.2.85 J --: - ' c> E li:" en :::> a: 0 I a.. en 0 I a.. .....J ~ 0 t- -1 1.1 0.6 0.4 ~ 0.2 I.A. """'Q.'O"" ~ 0 10 23 0 23 6 23 0 4 0 v G c T s s~ 0 v SUMMER to II 0 17 4 20 0 I G c T s ss 0 v WINTER 3 0 6 0 G c T s BREAKUP J 7 ss e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-0ENALI V-VEE CANYON G-GOLO CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I.A. CRITERION: LESS THAN 0.01 mg./ I. FOR ELEMENTAL PHOSPHORUS (EPA 1976). I.B. 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. 4. AT SUNSHINE, 2 WINTER OBSERVATIONS WERE LESS THAN 0.01 mg./1. 5. AT SUSITNA STATION, 2 WINTER OBSERVATIONS WERE LESS THAN 0.01 mg./ I. DATA SUMMARY-TOTAL PHOSPHORUS SOURCE: USGS AND R a M FIGURE E.2.86 1 J 0.6 __; ........ c. .. E ~ a.. en 0.4 c:r w ti :I: a.. en 0 :J: a.. 0.2 0 :I: ~ 0::: 0 4 0.0 - 0 9 27 0 II 3 I 0 4 D v G c T s ss D v SUMMER -1 1 j I 8 0 4 I 2 0 G c T s ss D WINTER 1 I 3 0 0 v G c T BREAKUP 0 I s ss l .. -1 e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-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, 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. 3. AT GOLD CREEK, 13 SUMMER OBSERVATIONS WERE LESS THAN 0.02 mg./ I. 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./1. DATA SUMMARY-ORTHOPHOSPHATE SOURCE' USGS AND R8 M. FIGURE E.2. 87 J --·-1 l 3.0 ..... ........ Cl E 2.0 z Cl) <( z LLJ a> 0 a:: 1-LO z LLJ 1-<( a:: 1- z . 0.0 lit~ II 19 71 6 31 0 I 3 4 D v G c T s ss D v SUMMER -J 1 30 4 II 0 I I 2 G c T s ss D v WINTER 9 0 10 0 G c T s BREAKUP ~ 0 ss e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: I.A. CRITERION: LESS THAN IOmg./ 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 O.IOmg./1: 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 -l SOURCE: USGS AND RSM FIGURE E.2 .88 --....... till .§. en e ...J 0 en Cl LLJ > ...J 0 en ~ Cl ...J ~ 0 1- . -J l . -J l J --1 ---1 300 200 100 4 ·! 0 0 10 .. 59 .. 6 39 8 24 0 4 23 0 19 4 20 0 I 8 0 10 0 7 D v G c T s S;:)! D v G c T s ss D v G c T s ss SUMMER WINTER BREAKUP 0-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). 1.8. ESTABLISHED TO PROTECT NATURAL CONDITIONS OF FRESHWATER ECOSYSTEMS (500 mg./ I. IS THE CRITERION FOR WATER SUPPLIES). DATA SUMMARY-TOTAL DISSOLVED SOLLDS SOURCE: USGS AND R 6 M l e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.89 u 0 It) (\J 400 !;t 300 E ~ rn 0 -<: E ::J ~ >- !::: 200 > 1-u ::::> 0 z 0 u 100 18 29 D v l 467 1., l·r- 32 81 14 73 9 27 3 5 G c T s ss D v SUMMER l . -1 J 1 l l I 37 5 31 3 22 I 3 9 2 18 0 7f- G c T 5 ss D v G c T s ssr-- WINTER BREAKUP 0-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 RaM e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.90 ---"j --~ l l -1 -) 60 40 _; ...... c. E LtJ 1-~ ...J 20 ::::l en 1 .. ~ 0 II 19 78 6 62 9 25 3 4 33 4 29 4 21 I 2 9 0 16 0 7 0 v G c T s ss 0 v G c T s ss 0 v G c T s ss SUMMER WINTER BREAKUP 0-0ENALI V-VEE CANYON G-GOLO CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I.A. CRITERION: SHALL NOT EXCEED 200mg./I.(ADEC 1979). I. B. ESTABLISHED TO PROTECT WATER SUPPLIES. 2. AT GOLD CREEK, I SUMMER OBSERVATION AND I BREAKUP OBSERVATION WERE LESS THAN 5.0 mg./1. 3. AT TALKEETNA, I SUMMER OBSERVATION WAS LESS THAN 1.0 mg./1. SOURCE' USGS AND RS M DATA SUMMARY-SULFATE l e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 91 30 ' 20 ~ ......... gl E w 10 e a:: 0 _j ::r:: u I I~ to 0 . -. II 19 74 6 62 9 24 3 4 33 4 29 4 21 ' I 2 9 0 16 0 7 0 v G c T s ss D v G c T s ss 0 v G c T s ss SUMMER WINTER BREAKUP 0-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 I.Omg/1 3. AT GOLD CREEK, 2 SUMMER OBSERVATIONS WERE LESS THAN THE DETECTION LIMIT OF 1.0 mg /I. DATA SUMMARY-CHLORIDE SOURCE: USGS AND R8 M l .. -1 -~J e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION -1 FIGURE E.2. 92 1 -l -l 60 -- ' 40 .;. E Q "" > ..J 0 (/) (/) Q 20 ~ --0 () :IE ~ () J ..J <( 0 () II I~ 74 6 61 9 25 3 4 33 4 32 4 21 I 2 9 0 16 0 7 D v G c T s So D v G c T s ss D v G c T s ssr-- SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: 1. NO CRITERION ESTABLISHED. 2. (d)= DISSOLVED DATA SUMMARY-CALCIUM (d) SOURCE: USGS AND RaM e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION .... l FIGURE E.2. 93 l -----'j ----1 15.0 ..... ....... 0 E c "-' 10.0 > _J 0 (/) (/) 0 ~ Dl ~ :IE 5.0 2 ~ 11 ·~ (/) "-' z (!) ct ~ 0.0 .. II 19 74 6 61 9 25 3 4 33 4 32 4 21 I 2 9 0 16 0 1 r- D v G c T s ss D v G c T s ss D v G c T s ss r- SUMMER WINTER BREAKUP 0-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 ANO R 8 M e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.94 .. l ----} 30 - ':-20 Clll E I ._. 0 LLI ~ 0 (/) (/) i5 -til 10 z --:I :::! 0 0 (/) 0 - I .. II 19 64 6 61 9 25 3 4 27 4 29 4 21 I 2 7 0 16' 0 7 D v G c T s S;:, D v G c T s ss 0 v G c T s ss SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE 55-SUSITNA STATION NOTES: I. NO CRITERION ESTABLISHED. 2. (d)-DISSOLVED SOURCE' USGS AND RaM DATA SUMMARY-SODIUM (d) e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.95 1 15.0 - ....... do E 10.0 Cl w ~ 0 fl) fl) 0 -lt- :11::: 5.0 ~ :::> . fl) fl) < b a.. 0.0 II 19 64 6 61 9 25 3 4 26 4 29 4 21 I 2 7 0 16 0 7 0 v G c T s ss 0 v G c T s ss 0 v G c T s ss SUMMER WINTER BREAKUP 0-0ENALI V-VEE CANYON G-GOLO CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I. NO CRITERiON ESTABLISHED. 2. AT VEE CANYON, I SUMMER OBSERVATION AND I WINTER OBSERVATION WERE LESS THAN THE DETECTION LIMfT OF 1.0 mg./ I. 3. (d)=DISSOLVED DATA SUMMARY-POTASSIUM (d) SOURCE: USGS AND RaM e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 96 170 co E ~120 (.) D (.) ~ (/) (/) l1J z ~ 70 <% :X: 20 19 9 D v ~ . 73 6 62 9 25 4 0 G c T s s~ D v SUMMER I• 33 4 29 4 21 2 I 9 0 16 0 7 1- G c T s ss D v G c T s ss f-- WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -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, FOR EXAMPLE, ARE 0.0012 mg./ I. IN HARD WATER AND 0.0004 mg./1. IN SOFT WATER. DATA SUMMARY -HARDNESS SOURCE: USGS AND R8M --~ • MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 97 / . l -· ·'] ) --1 9.0 8.0 (/) 1- ~ I.A. :z: A. :z: 7.0 A. 6.0 II 19 74 6 65 7 2-3 4 34 4 29 3 20 I 2 9 0 16 0 7 0 v G c T s s~ 0 v G c T s ss 0 v G c T s ss SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I. A. CRITERIA: NOT LESS THAN 6.5 OR GREATER THAN 9.0 pH UNITS. 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 R&M e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.98 e1 175 ...... 0 125 E 10 0 ~ en < ~ 75 z :J < ~ ...J < c~~, II 16 D v _ec ___ ,l '1 -1 ---- ... 67 6 60 6 21 3 G c T s ss D SUMMER _eel c~~l '-=-~) ~--, c_~, ~ 3 33 4 29 2 19 I I 7 0 14 0 6f- v G c T s ss D v G c T s ssf- WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: I. A. CRITERION: 20 mg./ I. OR MORE EXCEPT WHERE NATURAL CONDITIONS ARE LESS (EPA 1976). I. B. ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. DATA SUMMARY-ALKALINITY SOURCE: USGS AND R 8 M 1 ----'J e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 99 30 ~ ~ 20 ":- 1:1' E LIJ 0 x 0 0 z 0 10 m 0:: <t (.) LIJ LIJ 0:: LL. 0 II 16 62 6 55 3 15' -3 D v G c T s S::i ·o SUMMER 1 . -.. '- 3 29 4 24 v G c T WINTER 0 s .... 11 -----J 15 ss I I 6 0 14 0 5 0 v G c T s ss BREAKUP 0-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 RaM e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.100 0 E z 0 al a:: ~ u ~ z ~ C) a:: 0 _. ~ b ._2 30 20 10 - 0 I •'" ~ . ... ----- 0 0 10 0 3 2 7 0 I 4 0 2 2 9 0 0 2 0 I 0 4 r- D v G c T s So 0 v G c T s ss 0 v G c T s ss 1- SUMMER WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: I. NO CRITERION ESTABLISHED. 2. WATERS CONTAINING LESS THAN 3.0 mgJI. HAVE BEEN OBSERVED TO BE RELATIVELY CLEAN (McNEELY et ol.l979). DATA SUMMARY-TOTAL ORGANIC CARBON SOURCE, USGS AND R a M e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION l FIGURE E. 2.101 60 -"":- CJI E 40 ~ 0 z <( ::IE w 0 z w (,!;) >-X 20 0 ....J <( ~ ::IE w :I: (.) 0 SOURCE: R S M 0 8 16 0 0 0 0 0 4 5 0 0 0 0 0 I 2 0 0 0 0 f- D v G c T s S;:, D v G c T s ss D v G c T s ss f- SUMMER WINTER BREAKUP 0-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, 2 SUMMER OBSERVATIONS WERE LESS THAN 1.0 mg./ I. DATA SUMMARY-CHEMICAL OXYGEN DEMAND e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2.102 ~ z ::I 150 !:J 100 <( ID 0 (.) ~ ::I z § a..I.A~50 a:: 9 0 (.) UJ ::I a:: 1-0 I 14 17 D v .. 62 6 30 3 4 3 4 G c T s ss D v SUMMER . 25 4 13 I 4 I 2 G c T s ss D v WINTER 8 0 8 0 G c T s aREAKUP - 0 ss ----1 __ c_J e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA $-SUNSHINE SS-SUSITNA STATION NOTES• I. A. CRITERION: SHALL NOT EXCEED 50 UNITS (ADEC 1979). I.B. ESTABLISHED TO PREVENT THE REDUCTION OF PHOTOSYNTHETIC ACTIVITY WHICH MAY HAVE DELETERIOUS EFFECTS ON AQUATIC LIFE. 2. AT DENALI, I SUMMER OBSERVATION WAS LESS THAN 5 UNITS. ONE SUMMER OBSERVATION WAS GREATER THAN 5 UN ITS. 3. ATSUSITNA STATION,2SUMMER OBSERVATIONS AND 2 WINTER OBSERVATIONS WERE LESS THAN 5 UNITS. 4. AT TALKEETNA, I WINTER OBSERVATION WAS LESS THAN 5 UNITS. DATA SUMMARY-TRUE COLOR FIGURE E.2. 103 SOURCE• USGS AND RS.M 2.A . 3.0 ~ -' .....,. 0' E 2.0 - 0 w ~ 0 (/') !a 0 " ~ <( 1.0 -~ :::> z :::'!: :::> ...J <t 0.0 ~ 0 10 6 0 0 0 0 0 3 D v G c T s ss D v SUMMER .... , ) I . 3 0 0 0 0 0 G c T s ss D WINTER I 2 0 0 v G c T BREAKUP ' 0 0 s ss e MAXIMUM e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES, I. NO CRITERION ESTABLISHED. 2.A. ALIMITOF0.073mg./I.HAS BEEN SUGGESTED BY EPA (SITTIG 1981). 2.8. THIS SUGGESTED LIMIT IS BASED ON THE EFFECTS OF ALUMINUM ON HUMAN HEALTH. 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./ 1. 4. AT GOLD CREEK, 4 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS AND THE 2 BREAKUP OBSERVATIONS WERE LESS THAN THE DETECTION LIMIT OF 0.05mg./l. 5. (d)=DISSOLVED. SOURCE' RS M DATA SUMMARY-ALUMINUM (d) FIGURE E.2. I 04 --l 1 ) ) 30 -....... do E ~ LLJ ...J ID < ffi 2 0 > 0 0 LLJ a:: ...J ~ ~ ~ 10 2 ::J z i ::J ...J <! 2A. .. a - 0 0 3 0 I 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 f- D v G c T s S;, D v G c T s ss D v G c T s ssr- SUMMER WINTER BREAKUP 0-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 • MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. I 05 ·-] 1 1 0.30 ....: ........ c. 0.20 E 0 w ::i 0 en en 0 ~ IIl 0.10 :I: I- :::! ~ en iii 2.A.~0 0 10 7 0 0 0 0 0 3 D v G c T s ss 0 v SUMMER 3 0 0 0 0 0 I G c T s ss 0 v WINTER 2 0 0 0 G c T s BREAKUP 0 ss --1 1 r- r- e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLO CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION 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./1. 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. SOURCE' R 8 M DATA SUMMARY-BISMUTH (d) FIGURE E. 2. I 06 1 0.003 0 c. 0.0020 E ~ 0 w ~ 0 en en 1.~ 0 0.001 -~I.~ < u 2.______... 0 0.0000 0 0 D v -- . -- 3 0 4 3 13 0 0 G c T s ss D v SUMMER I 0 5 I 9 0 0 G c T s ss D v · WINTER 0 0 2 G c T BREAKUP - l ~ 0 6 s ss e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUS I TNA STATION NOTES• I. CRITERIA• 0.0012 mg./1. IN HARD WATER AND 0.0004 SOFT WATER {EPA 1976). 2. CRITERION• LESS THAN 0.0002 rng./1. (McNEELY et ol. 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./1. 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./1. THE 9 WINTER OBSERVATIONS AND THE 6 BREAKUP OBSERVATIONS WERE LESS THAN 0.003 mg./1. 8. (d)= DISSOLVED SOURCE' USGS DATA SUMMARY-CADMIUM (d) FIGURE E.2. I 07 0 .0030 .0020 0.0010 '0 ~ :E I. :::J ~ 2 <1 - u 0 .0000 0 0 D v ···-, 0005 0010 6 0 10 6 13 0 0 G c T s ss D v SUMMER I 0 5 I 9 0 0 G c T s ss D v WINTER 0 0 3 0 G c T s BREAKUP ..... , f 6 ss e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUS I TNA STATION NOTES I. CRITERIA: 0.0012 IN HARD WATER AND 0.0004mg/ I IN SOFT WATER (EPA 1976). 2. CRITERION: LESS THAN 0.0002 mg./1. (McNEELY et ol. 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./1. 5. AT TAU<EETNA,5 SUMMER OBSERVATIONS, I WINTER OBSERVATION AND 2 BREAKUP OBSERVATIONS WERE LESS THAN 0.010 mg./ I. 6. AT SUNSHINE,4 SUMMER OBSERVATIONS WERE LESS THAN 0.010 mg./ I. 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. I 08 1 0 ~ 0. 0 ILl ~ 0 (/) ~ .030 020 ~ 0 .010 :::> u ffi 2. a.. a.. 0 u 0. 000 0 0 D v l I I - 3 0 3 3 13 0 G c T s ss D SUMMER . 0 I 0 5 I 9 0 0 v G c T s ss D v WINTER 0 0 2 0 G c T s aREAKUP - 6 ss e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: I. CRITERION: 0.01 OF THE 96-HOUR LC 50 DETERMINED THROUGH BIOASSAY (EPA 1976). 2. CRITERION:0.005 mg/1 (McNEELYetol. 1979). 3. THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 4. AT TALKEETNA, THE 3 SUMMER OBSERVATIONS WERE LESS THAN 0.010 mg/i. 5. AT SUSITNA STATION, 6 SUMMER OBSERVATIONS,2 WINTER OBSERVATIONS AND 2 BREAKUP OBSERVATIONS WERE LESS THAN 0.002 mg I I. 6. (d) = DISSOLVED. DATA SUMMARY COPPER {d) SOURCE• USGS FIGURE E.2.1 09 --] -J -----, --, J ~~~1 '~j ~--, -- 0.30 ':- 01 E w _J m 0.20 <( a:: I . w > 0 (.) w a:: _J ~ 0 ~--~ 0.10 ~ :3 (.) a:: w a.. a.. 0 (.) 2 ·coo 0 0 6 0 ll 6 13 0 0 I D v G c T s ss D v G -1 --, ~-=, ~~---, -- 0 5 I 9 0 0 0 c T s ss D v G ) 1 0 3 0 c T s ~~c, - 6 ss ~~~'1 ~C----~~ 1 e MAXIMUM MEAN e 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. CRITERION:O.OI OF THE 96-HOUR LC 50 DETERMINED THROUGH BIOASSAY (EPA 1976). 2. CRITERION: 0.005 mg./1. (McNEELY et ol.l979). 3. THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 4. AT GOLD CREEK, 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./1. 6. AT TALKEETNA, I BREAKUP OBSERVATION WAS LESS THAN 0.020 ma./1. 7. (t) =TOTAL RECOVERABLE. --, SOURCE' USGS DATA SUMMARY-COPPER (t) FIGURE E.2.110 ....: ...... Cll E LLJ ...J CD <( Ct: LLJ f) r:d a:: ...J ~ 0 I- 60 40 20 - 0 0 D v 6 0 13 6 13 0 0 G c T s ss D v SUMMER ~ ,! " - --.. I 0 ~ I 10 0 0 0 0 4 0 6 G c T s ss D v G c T s ss WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA 5-SUNSHINE SS-SUSITNA STATION NOTES: I.A. CRITERION= LESS THAN I.Omg./1. (EPA 1976; SITTIG 1981). I. B. ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 2. (t)= TOTAL RECOVERABLE. DATA SUMMARY-IRON (t) SOURCE' USGS e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. Ill 0.30 Cl E 0.20 LIJ ....J m <t a: LIJ ~ (.) LIJ a: ....J .: 0 ..... :g a.. 0.1 -.; 1.--. <t LLJ ....J 0.0 0 0 I 0 0 D v --1 ~~, 6 0 10 6 13 0 0 G c T s ss D v SUMMER ~~c1 -~·=---, c-~; I 0 5 I 9 0 0 G c T s ss D v WINTER =c~J l r 0 0 2 0 G c T s BREAKUP 1 ' ~ 6 ss J _c1 e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS -SUSITNA STATION NOTES: I. CRITERION: LESS THAN 0.03 mg./ I. (McNEELY et al. 1979). 2. CRITERION: 0.01 OF THE 96 -HOUR LC 50 DETERMINED BY BIOASSAY (EPA 1976). 3. ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 4. AT GOLD CREEK, 3 SUMMER OBSERVATIONS WERE LESS THAN O.IOOmg./1. 5. AT TALKEETNA,6 SUMMER OBSERVATIONS AND I WINTER OBSERVATION WERE LESS THAN O.IOOmg./1. 6. AT SUNSHINE, 2 SUMMER OBSERVATIONS WERE LESS THAN 0.100 mg./1. 7. ISJ SUSITNA STATION, 5 SUMMER OBSERVATIONS, 3 WINTER OBSERVATIONS, AND 2 BREAKUP OBSERVATIONS WERE LESS THAN 0.200 mg./ I. 8. (t)= TOTAL RECOVERABLE. SOURCE• USGS DATA SUMMARY-LEAD (t) FIGURE E.2.112 -J ' ~ E a LLI ~ (/) (/) 0 LLI (/) -1 0.30 0.20 0.10 ~ I.A. < (!) z < ::IE 0.00 ~--) "--~1 0 0 D v .~~----1 "c~c---~l '~-~, 7 0 13 5 13 0 0 G c T s S::t D v SUMMER '~~~-1 ~ ~~ -1 _c __ ~-'1 c---'~~~, -~ --~, -~--'-'~~1 I 0 7 2 9 0 0 0 0 I 0 6 G c T s ss D v G c T s ss WINTER BREAKUP 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I.A. CRITERION: LESS THAN 0.05 mg./1. (EPA 1976) I.B. ESTABLISHED TO PROTECT WATER SUPPLIES. 2. AT SUSITNA STATION, 6 SUMMER OBSERVATIONS, I WINTER OBSERVATION AND 6 BREAKUP OBSERVATIONS WERE LESS THAN 0.010 mg./ I. 3. (d)= DISSOLVED DATA SUMMARY-MANGANESE (d) SOURCE' USGS "c~1 ---, -~1 e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E.2. 113 ) LLI --' aJ ct a:: LLI ~ frl a:: --' ~ 0 1--~ c 2: LLI rn LLI z ct C) z ct 2: -~-~, ~-~-, •"---·•) --=--·-=---1 1 1 l --' ---J ~-=-1 ~-1 ----l J '--=~--1 I. 50 1.00 0.50 I. A • 0.00 '---.. I 0 0 6 6. "12 6 13 0 0 I 0 5 I 9 0 0 0 0 4 0 6 D v G c T s Sl:) D v G c T s ss D v G c T s ss 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 0.05 mg./ I. (EPA 1976). I. B. ESTABLISHED TO PROTECT WATER SUPPLIES. 2. AT SUSITNA STATION, I BREAKUP OBSERVATION WAS LESS THAN O.Oimg./1. 3. (t )=TOTAL RECOVERABLE. DATA SUMMARY-MANGANESE (t) SOURCE• USGS -~---, ~~'-1 -~--, e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION FIGURE E. 2.114 0.0 003 ~ 0. 0002 E 0 w =:i 0 (/) (/) 0 --; 0.0 :I: >-a:: ~ I.A. a:: w 2: 0.0 001 000 0 0 3 0 3 D v G c T SUMMER _,, ~-1 ~~-, 3 13 0 0 I 0 2 2 s ss D v G c T s WINTER =c=--, ~-'' 1 ---1 --- 9 0 0 0 0 0 ss D v G c T BREAKUP J --"==1 " 0 6 s ss c~--1 --~1 = --, e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I.A CRITERION: LESS THAN 0.00005 mg./1. (EPA 1976). I.B. 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. 3. AT SUSITNA STATION, 8 SUMMER OBSERVATIONS, 7 WINTER OBSERVATIONS, AND THE 6 BREAKUP OBSERVATIONS WERE LESS THAN 0.0005 mg./ I. 4. (d): DISSOLVED DATA SUMMARY-MERCURY (d) ----1 SOURCE,USGS FIGURE E.2 .115 l ~. ~, =~ J 0-'~1 ~-~1 cC~~~~, ~-~-, ~-~1 ' ~,-~,,1 ---~--1 ---1 ,_ -1 --cl ~--'c1 -b.'obb8' 0.0 006 w a5 0.00 04 : e MAXIMUM <( 0::: w ~ u w 0::: ...J ~ 0 I- >-0:: :::::> u 0:: w :IE 0.0 002 .-I. A 0.0 000 0 0 D v 6 0 9 G' c T SUMMER 6 13 0 0 s ss D v I 0 5 I 9 0 0 G c T s ss D v WINTER 0 0 3 G c T BREAKUP - 0 6 s ss -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I.A. CRITERION: LESS THAN 0.00005mg./l. (EPA 1976). I.B. ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 2. AT TALKEETNA, I SUMMER OBSERVATION WAS LESS THAN 0.0005 mg./1. 3. AT SUSITNA STATION, 7 SUMMER OBSERVATIONS, 7 WINTER OBSERVATIONS AND 4 BREAKUP OBSERVATIONS WERE LESS THAN 0.0005 mg./ I. 4. AT GOLD CREEK, THE I WINTER OBSERVATION WAS LESS THAN 0.0005 mg. I I. 5. (t): TOTAL RECOVERABLE. DATA SUMMARY-MERCURY (t) ~1 SOURCE: USGS FIGURE E.2 .116 0 .I !SO ~0 m .100 < a:: w ~ (.) w a:: ....J ~ bo .050 1- 000 0 0 D v ) 6 0 I 6 5 0 0 G c T s ss D v SUMMER ... J 1 I 0 0 I 3 0 0 G c T s ss D v WINTER 0 0 0 0 G c T s BREAKUP - I ss e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-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 et ol. 1979). 2. CRITERION: 0.01 OF THE 96-HOUR LC 50 DETER MINED 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./1. 5. AT TALKEETNA, THE I SUMMER OBSERVATION WAS LESS THAN 0.05 mg./1. 6. AT SUNSHINE,2 SUMMER OBSERVATIONS WERE LESS THAN 0.05 mg./1. 7. (t) =TOTAL RECOVERABLE. SOURCE' USGS DATA SUMMARY-NICKEL (t) FIGURE E.2.117 -} ---, l --·l C. -, . C, 0.30 .:::::. 0 0.20 ~ c LLJ > ...J 0 en ~ c c: 0.10 N 0 z r::; I. 0.00 L-.. 0 0 3 0 3 3 1'3 0 0 D v G c T s ss D v SUMMER I 0 5 I 9 0 0 G c T s ss 0 v WINTER --1 0 0 2. G c T BREAKUP ~ 0 6 s ss ··} ··-.. 'l e MAXIMUM MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION 0-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA $-SUNSHINE SS-SUSITNA STATION NOTES: I. CRITERION: LESS THAN 0.03 mg./ I. (McNEELY et ol. 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./1. 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 .::::: cit E w ...J ID <t a::: w > 0 (.) w a::: ...J <t 1- 0 1- ~ <: N (.) z r::i . ~·l ----., 0.30 0.20 0.10 1.----. 0.00 0 0 6 0 II 6 13 0 0 I 0 5 D v G c T s ss D v G c T SUMMER WINTER --, ~-1 I 9 0 0 0 0 3 s ss D v G c T BREAKUP ~ 0 6 s ss . --1 e MAXIMUM -MEAN e MINIMUM NO. OF OBSERVATIONS LOCATION D-DENALI V-VEE CANYON G-GOLD CREEK C-CHULITNA T-TALKEETNA S-SUNSHINE SS-SUSITNA STATION NOTES: I. CRITERION: LESS THAN 0.03 mg./ I. (McNEELY at al.l979). 2. CRITERION: 0.01 OF THE 96-HOUR LC 50 DETERMINED THROUGH BIOASSAY (EPA 1976). 3. THE ABOVE CRITERIA ESTABLISHED TO PROTECT FRESHWATER AQUATIC ORGANISMS. 4. AT SUSITNA STATION, I SUMMER OBSERVATION AND 2 WINTER OBSERVATIONS WERE LESS THAN 0.020 mg./1. 5. (t)=TOTAL RECOVERABLE. DATA SUMMARY-ZINC (t) SOURCE' USGS FIGURE E. 2.119 l l l l J J j 8-3Ae 8-4A. \ Col ~ SLOUGH SA GROUND WATER CONTOURS LEGEND: • GROUND WATER OBSERVATION WELL ( eg. s-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 l ---··---- 9-2· 9-8· SLOUGH 9 GROUND WATER CONTOURS FLOW ALASKA RAILROAD LEGEND : • GROUND WATER OBSERVATION WELL ( eg 9-15.) NOTES: I ELEVATIONS ON SEPTEMBER 6, 1982 WITH DISCHARGE AT GOLD CREEK= !2,200 CFS . 2 . CONTOURS IN FEET ABOVE MEAN SEA LEVEL. FIGURE E.2. 121 70 - 26 f'"' 24 - 22 20 r-1- I.LI I.LI 18 1.1.. ::E 0 ,_ 16 ,_ 0 CD ,..... :::IE 0 14 a:: 1.1.. z 0 12 ,_ - <X > I w _I 10 -w 8 - 6 - 4 I I I I I F"" 2 - -I - 60 " "' 50 AREA (ACRES) 40 30 20 10 0 / v / '/ " / VOLUME " / "\ / / / \ / \ \ / \ J \ I SURFACi AREA-.\ \ I \ 2 4 5 VOLUME(ACRE-FEET x 100) SALLY LAKE AREA-CAPACITY CURVES I \ " "\ \ \ \ \ \ \ 6 7 8 FIGURE E. 2. 12 2 J J J LEGEND: -------NORMAL MAXIMUM OPERATING LEVEL EL.2185' ~230Q-CONTOURS ARE IN FEET ABOVE MSL ------SLOUGH ··-··-TRIBUTARY WATER BODIES TO BE INUNDATED BY WATANA RESERVOIR ( i ./21 0 2 MILES SCALE~~-~ FIGURE E .2.123 l I J l l l l J J J J Portage Creek) 7 LEGEND: -------NORMAL MAXIMUM OPERATING LEVEL EL. 1455 ---2000----i~~u:~~N FEET -----SLOUGH .. -··-TRIBUTARY J SUSITNA RIVER WatanaDam o~ \ 0 2 MILES SCALE ~~iiiiiiiiiiiiiii WATER BODIES TO BE INUNDATED BY DEVIL CANYON RESERVOIR FIGURE E.Z. 124 l l l 1 l 1 J J J J I I I I \ \ I I I I I \ ---\ // '~ " / " " / " ' / ~ __ / " SOURCE: DWIGHT 1981 " " 0~~~~10iiiiiiiiiiiiiiiiiiiiiiiiiiiliii20 MILES SCALE = TOWNSHIP GRIDS INVESTIGATED FOR WATER RIGHTS IN THE SUSITNA RIVER BASIN LEGEND: TOWNSHIPS I. SUSITNA 2. FISH CREEK 3. WILLOW CREEK 4. LITTLE WILLOW CREEK 5. KASHWITNA 6. SHEEP CREEK 7. MONTANA CREEK 8 TALKEETNA 9. CHULINA ( CHUNILNA) 10. SUSITNA RESERVOIR II. CHULITNA 12. TOKOSITNA 13. KROTO -TRAPPER CREEK 14. KAHILTNA 15. YENTNA 16 . SKWENTNA 17. HAPPY 18 ALEXANDER CREEK FIGURE E .2.125 1 -1 .... 1 ··-l -1 .... J l LEGEND: ~ SALINITY ESTIMATE ~ LOCATIONS ~ ·\_ ... KENAI PENINSULA BL'fiNG SOUND 0 SELECT LOCATIONS OF COOK INLET SALINITY ESTIMATES 1 20 40 FIGURE E.2 .126 I I J J J J J J SOURCE: RMA 1983 30,000 r----------r---------,----------r---------.----------,----------~---------r---------.----------~---------r--------~~------~ 25,000 r----------r--------~----------t----------r--------~~--------1----------+--------~----------+----------+----------~------~ 20,000 10,00 0 5,000 r----------r--------~----------t---------~--------~~--------+----------}--------~----------+----------+----------~--~--~ 0 ~-------L--------~------~--------~------~--------~------~--------~------~--------_L ________ L_ ______ ~ OCT NOV DEC NOTES: I. CURVES PLOTTED USING END OF THE MONTH SALINITIES FOR NODE 27. 2. I PPT= 1000 mg/1 . JAN FEB MAR APR MAY JUN MONTHS TEMPORAL SALINITY ESTIMATES FOR COOK INLET NEAR THE SUSITNA RIVER MOUTH JUL AUG SEP LEGEND: PRE-PROJECT ---WATANA FILLING ( W Y 1992) -·-· WATANA OPERATION (WY 1995 ) FIGURE E .2. 127 - - - 1- LLJ LLJ IL. z 0 ~ > LLJ ....J LLJ - - 2600 2500 2400 2300 2200 2100 eooo 1900 1800 1700 1600 1500 1400 0 SURFACE AREA (ACRES x 10 4 ) 6 5 4 3 2 0 ~ ~ ~ )< / / VOLUME 1/ '\ SURFACE AREA / 1\ v \ I \ I \ I \ 2 4 6 8 10 VOLUME (ACRE-FEET x 106) WATANA RESERVOIR VOLUME AND SURFACE AREA \ 12 14 FIGURE E.2. I 28 - ..... - r - ~~ ! - ·~ --1-w w II.. z Q !c( > w _J ILl 1500 1400 1300 1200 1100 1000 900 0 SURFACE AREA (ACRES x 103 l 12 10 8 6 4 2 0 I l"" I / / ~/ v I VOLUME / / ~ / r-SURFACE AREA I v 1\ v \ i\ I I 1\ I I \ I \ I I 2 4 6 8 10 VOLUME (ACRE-FEET x 105) DEVIL CANYON RESERVOIR VOLUME AND SURFACE AREA I 12 14 FIGURE E.2. I 2 9 l J 20 18 16 14 -;; 12 u. (..) 0 0 0 ~ 10 IJJ (.!) a:: <l J: (/) 0 8 4 2 0 I I I I c, c,c, OCT NOV DEC NOTEs : I) LETTERS DESIGNATE THE VARIOUS SCENARIOS CONSIDERED ( ie. A= CASE A). 2) FLOW REPRESENTS GOLD CREEK FLOWS . ALL CASES JAN 3 ) Three additional flow regimes were investigated with respect to project economics. These regimes are discussed FEB MAR APR MAY in Exhibit B,pages B-2-123 thru B-2-128 I M M Q 1 & are identified as cases E,F, & G. MIN U PERATIONAL TARGET FLOW FOR ALTERNATIVE FLOW SCENARIOS AI D C2 Cl c A2 1 AI D A A2 ' J \ 'A I I JUN JUL AUG SEP FIGURE E .2 .130 · ,~, ~'14/ ,, I 1 1 ('. (BORROW \ '\)SITE C ~{( \jJ ; ' POTENTIAL WATANA BORROW SITES 0 4 8 MILES SCALE LOCATION MAP LEGEND c.:: ::J BORROW I QUARRY SIT£ LIMITS SCALE 0~~~--~2 MILES FIGURE E,2, 131 SUSITNA RIVER FLOW - REFERENCE: BASE MAP FROM CO E, 1976 I"~ ZOO' WATANA TOPOGRAPHY SHEETS 8 8 9 OF Z6, COORD IN ATES IN FEET, ALASKA STATE PLANE (ZONE 4) '"'-7 / N 3 ZZ8 500 WATANA QUARRY SITE L QUARRY SITE L QUARRY SITE LIMIT LEGEND ---BORROW SITE LIMIT I. ENTIRE QUARRY SITE LIES WITHIN PROPOSED WATANA RESERVOIR LIMITS . Z. MATERIAL LIMITS INFERRED FROM PRELIMINARY MAPPING AND ARE SUBJECT TO REFINEMENT AND VERIFICATION IN DESIGN LEVEL INVESTIGATION. 3. SURFACE ELEVATIONS FROM I"= ZOO' TOPOGRAPH Y-COE, 1978, TRACED AT Z5 ' CONTOUR INTERVAL. 4 . PHOTO TAKEN AUGUST, 1981. SCALE O~lllllllllllllllllllllllllll~z Oli;Oiliiiiiiiiiiiiiiiiii400;ij FEET FIGURE E.2.132 g I ~ ~· -~" _____..--· "' ,._ w CONTOURS OMITTED FOR CLARITY WATANA BORROW SITE D BORROW SITE LIMIT l l l l l l l J J J J J J j J J ~ 0 0 0 0 0 0 .,; .., .. ,__ .., ,.__ "' w N 3,224,000 --•- N 3,228,000 '· REFERENCES : BASE MAP FROM COE,1978 -I" •200' WATANA TOPOGRAPHY ,SHEET 6 a II OF 26 R SM,I981-1""400' DEVIL CANYON RESERVOIR MAPPING,FLIGHT 5 (6-S),MANUSCRiPT 2 COORDINATES IN FEET, ALASKA STATE PLANE (ZONE 4) 0 0 o_ N ,.., ... w 0 0 0 ci "' ,__ WATANA BORROW SITE E I / 0 0 c: ., N ,._ w / / / 0 0 0 ..0 N ,__ LEGEND -----BORRO W SITE LIMIT PORTIONS OF BORRO W SITE LIE WIT HIN THE PROPOSED DEVIL CANYO N RESER VO IR LIM ITS. 2. MATERIAL LIMITS BASED ON F I ELD EXPLORATION, MAPPING AND AIR PHOTO INTERPRETATION. FINAL LI M ITS OF BORROW MATERIALS SUBJECT TO RESULTS OF DESIGN I NV ESTIGATIONS. 3. CONTOUR INTERVAL 25', TRACED AND/OR RE DU CED FROM REFERENCED BASE MAPS. 4. PHOTO TAKEN AUGUST, 1981. SCALE 0~~~4IIIOiiiOiiiiiiiiiiiiiiiiiil800 FEET FIGURE E. 2.134 l J J N 3, 205,000 N 3,210,000 N 3,215,000 N 3,220,000 ~ 1-2-; ) ~,) \_ '--"'""; 8 0 ci "' .... w / / / 0 0 0 .,; ;::: w / 0 0 0 e .... w \ L / /;: { '\ BORROW SITE I WATANA BORROW SITE I 0 8 0 0 0 .,; ci 0 0 ,_ ,._ w w Ol 0 0 .,; "' "' w -·-BORROW SITE LIMIT ENTIRE BORROW SITE AS DRAWN LIES WITHIN PROPOSED DEVIL CANYON RESERVOIR LIMITS. LOCAL DEPOSITS ARE INFERRED TO CONTINUE UP SLOPE BEYOND LIMITS SHOWN. 2 . MATERIAL LIMITS BASED ON FIELD MAPPING AND AIR PHOTO INTERPRETATION. FINAL MAPPED 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 TA KEN AUGUST, 1981. SCALE ~0 ~~1~0~00~~2~000 FEET FIGURE E.2.135 13 I I I I I I I I I I I I I I ' LEGEND: 12 1-..., • MINIMUM FLOW REQUIREMENT DURING FILLING OF WATANA ---MINIMUM FLOW II I-I I ..., REQUIREMENTS DURING OPERATION OF WATA NA AND WATANA/DEVIL CANYON. 10 1-I I - .l - (f) lJ... 81-I I -(.) 8 Q ~ 7 1-I I w - (.!) a:: <1 ::c (.) 6 I -(f) ., 0 I I : r---------____ , L ____ - 3 I I - 2 NATURAL: OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV TIME OF YEAR MINIMUM FLOW REQUIREMENTS AT GOLD CREEK FIGURE E.2. 136 100 9 8 7 6 5 4 3 (f) LL. (.) 0 2 0 0 w (!) 0:: <t :z: (.) (f) Cl 10 z 9 <t w 8 ::1: 0:: 7 <t w 6 >- w w 5 0:: ::r: ;- 4 3 2 ~---,_ • -..._____.,_ -2.. ••••• ··~·. v JL • I i I i i I I I I I I I 2 5 10 20 50 80 PROBABILITY OF EXCEEDANCE NOTE: PERIOD OF RECORD IS WY 1950 -WY 1981. THREE-YEAR MEAN DISCHARGE AT GOLD CREEK • • --- I I I I I I 90 95 98 99 FIGURE E. 2.137 l l 1 l 1 l 1 l J J J J J f-w w lL z 0 2200 WATANA DAM CREST ELEVATION 2000 ~ > w ...J w 1800 ~----/ WATANA WATER LEVELS Cfl LL.. {) 0 0 0 1600 1400 40 30 20 10 0 LEGEND : J 10% EXCEEDENCE PROBABILITY ----50% E XCEEDENCE PROBABILITY -----90% EXCEEDENCE PROBABILITY WATANA WATER LEVELS AND GOLD CREEK FLOWS DURING RESERVOIR FILLING GOLD CREEK · FLOWS NOTES: D FILLING COMPLETE I. NATURAL STREAM FLOWS UNTIL MAY 1991 WHEN FILLING BEGINS. 2. AVERAGE MO NTHLY VALUES PLOTTED IN MIDDLE OF MONTH . FIGURE E .2 .138 - - - r ,,.,.. ,.,.. - - - 50 40 !/) u. u 30 0 0 0 w (!) a:: <( J: u 20 !/) Cl 10 0 5 --CD '\ \ \ ® 10 15 AUGUST 20 25 30 LEGEND: NOTES: ® ---- AUGUST 1958 FLOWS FILLING SEQUENCE I, 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- LL.I 14 12 10 ~ 8 z 0 i= <( ~ 6 _J LL.I 4 2 0 0 20 J 1 1 1 --1 1 1 (PRE-PROJECT CONDITIONS I BACKWATER AREA ® DEGRADATION OF TRIBUTARY BED (UPSTREAM PROGRESSION OVER TIME) -.. -.. NOTE: THE ELEVATIONS AND DISTANCES PRESENTED ....._ IN THIS SCHEMATIC ARE NOT INTENDED TO PROVIDE QUANTIFICATION OF PROJECT EFFECTS. 40 60 80 100 DISTANCE (FEET) -.. 120 GRAVEL DEPOSITED BY TRIBUTARY 140 SUSITNA RIVER WATER LEVEL (PRE-PROJECT CONDITIONS) CD PERCHED TRIBUTARY BED (UNAFFECTED BY LOWERED LEVEL OF SUSITNA RIVER) 160 180 SCHEMATIC OF THE POTENTIAL EFFECTS OF THE SUSITNA RIVER ON A TYPICAL TRIBUTARY MOUTH .. -1 FIGURE E.2. 140 4 .0 3 .5 3.0 2.5 (.) 0 w a: :::> ~ a: 2.0 w a.. :::!: w I- 1.5 1.0 0.5 0 .0 I J 95.00 101 .00 107.00 113 .00 NOTE: I . MODEL ASSUMES DA I LY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY NATURAL FLOWS . 2 . GOLD CREEK DISCHARGE (CFS): OCT 4280 NOV 2560 DEC 1790 JAN 1460 0~V30 119 .00 125.00 131.00 137.00 14.3 .00 149.00 155 .00 161.00 167.00 173 .00 179.00 185.00 RIVER MILE WATANA FILLING: DOWNSTREAM TEMPERATURES-OCT TO JAN FIGURE E.2.141 l J J J ~ (.) 0 w 0:: :::> ti 0::: w a.. ::!: w I- 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 95.00 101.00 107.00 113.00 NOTE: I. MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY NATURAL FLOWS. 2 GOLD CR EEK DISCHARGE ( CFS ); JAN 1460 FEB 1240 MAR 1120 APR 1240 119.00 125.00 131.00 137.00 143 .00 149.00 155 .00 161.00 167.00 173.00 179.00 185.00 RIVER MILE WATANA FILLING: DOWNSTREAM TEMPERATURES-JAN TO APR FIGURE E.2. 142 4.0 3 .5 3 .0 2.5 (.) 0 w a::: :::) r- <[ z.o a::: w a.. ::i! w r- 1.5 1.0 05 0.0 95.00 101.00 107.00 113 .00 119.00 NOTE: I. MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND LOW FLOW DISCHARGE. 2 . GOLD CREEK DISC HARGE ( CFS l : OCT 2020 NOV 1460 DEC 1320 JAN 1260 l ~ l [ ~--[ r [ I r I I [ [ L l r/[ NOV 30 l [ 125.00 131.00 137.00 149.00 155 .00 161.00 167.00 173.00 WATANA RIVER MILE l FILLING: DOWNST I . .::AM l fEMPERATURES -OCT TO JAN LOW r NT e FLOWS 179.00 185 .00 FIGURE E.2. 143 4.0 3.5 3.0 2.5 u 0 w a:: ::J f- <{ a:: 2.0 w Q_ :::!: w f- 1.5 1.0 0.5 0.0 95.00 101.00 107.00 113.00 NOTE: I MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND LOW FLOW DISCHARGES. 2. GOLD CREEK DISCHARGE ( CFS): JAN 1260 FEB 12 20 MAR II 20 APR 1240 119.00 125.00 131.00 137.00 143.00 149.00 155.00 161.00 167.00 173.00 RIVER MILE WATANA FILLING DOWNSTREAM TEMPERATURES-JAN TO APR LOW WINTER FLOWS 179.00 185.00 FIGURE E.2.144 J J J () 0 w 0:: ::::> t:r 0:: w 0.. :::!: w 1- 9 .0 8.5 8 .0 7.5 7 .0 6.5 6.0 5.5 5.0 4.5 4.0 --· AUG 15 --·-·-·-·-·-·-·-·-·-. -·-SEP 15 ·--·-- SEP 30 95 .00 101 .00 107.00 113.00 119.00 125.00 131.00 NOTES: 15 ·-·-·-· -· .......... ----.----·-. -·-. -·-·---.. ........ ·- 137.00 143.00 149.00 155.00 161 .00 167.00 173.00 179 .00 RIVER MILES I. MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA AND MEDIAN FILLING FLOWS . WATANA: SECOND YEAR OF FILLING DOWNSTREAM TEMPERATURES-SUMMER 2 . GOLD CREEK DISCHARGE (CFS): JUN 6000 AUG 12000 JUL 6700 SEP 9000 185.00 FIGURE E.2 . 145 9 .0 8 .5 l 8 .0 7 .5 7 .0 u ~ w 6.5 a:: :::;i f- <( a:: w a_ :::!: w f-6 .0 5 .5 5 .0 4 .5 J 4.0 J J --·--AUG 15 ·--..... .......... ....._. --.. . ....._ --· SEP 15 SEP 30 95 .00 101.00 107.00 113.00 NOTES: I. MODEL ASSUMES 198 1 METEOROLOGICAL DATA RECORDED AT WATANA AND MEDIAN FILLING FLOWS WITH AUGUST FLOW REDUCED TO 6,000 C FS . 2. GOLD CREEK DISCHARGE ( C FS ): J UN 6000 JUL 6700 AUG 6000 SEP 9100 ---·-·--.......... ......__, --·--·-· ......... .......... .. -..... . ----. . ---·-·--.......... . ....._ ·--.......... ·--. ....._ ·--·-·--·-.... 119 .00 125.00 13 1.00 137.00 143 .00 149.00 155.00 16 1.00 167.00 173 .00 RIVER MILE WATANA: SECOND YEAR OF FILLING DOWNSTREAM TEMPERATURES-SUMMER 6POO CFS IN AUGUST 179 .00 185 .00 FIGURE E.2. 146 0 2 ~ 3 0.. w 0 4 5 ,/ v ...... J / ~·r ~ v ~ / , /' ,' r<' .......... ..,.1,-/ ~ ~ v"" ,/"" ~-;: !"""' ~ ""/'~ / , / v,.. / / ,...,. ...... ,...,.- l ~ ~ -~ ........ ~ f ~ fr / [..;< ...... / V'" .......... ~ , ....... -....... .... ~v---/}J v '"" ~~ v" / ,;' v ;:f / / / / v ~/ ..../ ',./ v v / / v / / ....... ~--/ tl ~ / J / v ..... .2 .3 .4 .5 .6 .7.8 .9 I 2 3 4 5 • 6 7 8 9 10 2 3 4 5 6 7 8 9 100 LEGEND: DATA --a-- -0----o-------fr---- DATA SOURCE • R Bo M 1982 STATION STA.II STA.II STA.II STA. II DATE JULY 15 1 1982 JULY 28 1 1982 SEPT. 10, 1982 AUG. 10, 1982 MICRO EINSTEINS PER SQUARE CENTIMETER PER SECOND EKLUTNA LAKE LIGHT EXTINCTION IN SITU MEASUREMENTS ~ / ~~ ,.,. .... r" / ( .. ...IY v / ,....., / 2 3 4 5 6 7 8 9 1000 FIGURE E.2.147 - """" I - - - r - -I - r ~ 0 >- () z w Q u.. u.. w 01 SCHARGE ( C FS) 1,500 2,000 5,700 9,500 13,300 17,060 21,300 94 I 90 AIUNI/ ~~ 0 ~ ~ ~ 86 I 82 78 74 70 lOG I J' I I I 300 500 700 PLANT OUTPUT ( MW) WATANA-UNIT EFFICIENCY AND DISCHARGE OPERATING RANGE (AT RATED HEAD) " 900 1,100 FIGURE E.2.148 - 2190 -2180 2170 -2160 -.: LLI LLI LL 2150 ..J LLI > LLI ..J 2140 a:: -5 > a:: UJ en 2130 UJ a:: <( z ~ 2120 <( ~ 2110 - 2100 2090 -2080 2070 - - - r ', ' MAX YEAR (WY 1956) ' ~--- ' I ', I \ I \ I \ I '\ \ I ' I ', I ' I ' I ' I ', I '\ ,..___ MIN. YEAR \ I (WY 1970) \ I \ I '\ I ' ' // ' / './ OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP WATANA RESERVOIR WATER LEVELS (WATANA OPERATION) FIGURE E.2.149 J J J J J "' ... u 0 0 ~ m ~ 40 ~---+----+----+----1-----~---+----+----+----1-----~---+----+----+----1---~111-----r----+----+----+----1-----~---+----+----+----4---~~~---+----r----+----4---~~--~ II " il I II [I I I II I 30 ~---+----+----+----1-----~---+----+----+----4-----~---+----+--.1++----4---#~~----r----+----+----+----1-----l~, ---------+----4----4----~----r-~nL+----+----4----~--~n 11 ~ 11 II ~I n li, tl 11 d n r: n nrl 1 ~ ~ :I '1 I I II ''-... 1 i 1 1 11 1 c 11 11 I 11 II 'I II ; J i :1 n 1 ~ II ~j .J 1 1 1 :~ n : : :: :: G J: ~ I : j~ :l rii 'i lUI :LI l U I 1l :: :: :: 1 1 : 1 ~I w ~---+--~+-~~--~~---Rr--T~--~+--.~--~~--~r---~--~+-~~---r#---~r--T~--+r+-~-~--~+---~----~--~+--4~--~~--~---rY---~+-~~----+-~rlH---rH---~ 'I } I I I I lnlll I I I~ I I I c, J I r,, I I I I I I I I: I ll I I I I I I ll I II I II II ! I I I 2200 I I I l I I ' L I I r I I I I " I I fl n I I I L, ,,n I I~ jl I I l _I ~ l : lr : 1 : 'l I~: : : : : : I I I I I : l 1 : '· : j : I I I L : u'l : I 1 1 I~ 1 L I I ) I I lJ I ~ I l 1 u I : l [I I ~ I I i 19l50 1951 LEGEND , :::::::JINFLOW OUTFLCI.v ~ _r j 1952 1953 1954 19l50 'L I I'L I 'l f ~ I ) 1956 19!17 1958 1959 1960 1961 1962 'l f ~ I t. r 1\ f ~ ( \ / ~ I ~ 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 19110 1981 WATER YEAR WATANA INFLOW AND OUTFLOW \ f ~ ,r r1 I \ r r1 I 'L "11 (\ ( rL !11, I I \ .f ( ~ ~ f ~ f ~. r I I ) ) iii 2100 \~ \r \r \i \r \ \J $ \I \( \! \r \ \r \ \ \I \ \ \f \ f ~r \1 \I \! 1\ I \r \I \( \ \I $ u u "" u u ..,. u u u u u u u u '"U u ~ u u u LJ \J u ~ u '11 u u u u u u s G:i .J .... "' ... u § .... " a:: c( ::t: u "' 0 I I 2000 19!10 19!11 1952 1953 19l50 1956 1958 19!19 1960 1961 1962 1963 1964 1967 1965 1966 1968 19 69 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 WATER YEAR WATANA RESERVOIR ELEVATION ~r----+----+---_,-----r----+----+----+---_,-----r----+----+----+---_,-----r--~~r----r----+----+-----r--~-----r----+----+----+---~----~----+----+----+---_,-----r---4 '1 II ~~---+----+----4----~----r----+----+----4----1-----r----+----+-~!~~----4---H-~---+----+----+----4---~-----+----r----+----+----4-----+----r----+----+----4----~--~ II II ,, 1 9~ 1951 LEGEND, [:::]PRE r::=JPOST 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 19 62 1963 1964 1965 1966 1967 1968 1969 1970 1971 1961 WATER YEAR GOLD CREEK PRE-AND POST-PROJECT FLOW WATANA SIMULATED RESERVOIR OPERATION FIGURE E.2.150 ..__ ......__. L-.: "------' '-----' L___ L...J -..J [__J L:.::J LEGEND: ------PRE-PROJECT ~ /!I ELEVATION CHANGE ---WATANA OPERATION 756 H • 754 752 f-w w I.J.._ ~ z ~ 750 f-<t > w .....1 w 748 746 NOTES: MAY JUN JUL AUG SEP MAX I MUM FLOWS I . WATER SURFACE ELEVATION ABOVE .RATING CURVE. 2 . RATING CURVE BASED ON GOLD CREEK DISCHARGE AND OBSERVED 1982 WATER LEVELS (ADFSG 1982). EXTRAPOLATED MAY JUN JUL AUG SEP MEAN FLOWS MAY JUN JUL AUG SEP MINIMUM FLOWS 756 754 752 ~ f-w w I.J.._ ~ z 0 f= 750 <t > w .....1 w 748 746 WATANA OPERATION: MONTHLY AVERAGE WATER SURFACE ELEVAT IONS AT RIVER MILE 142.3 :___] ~ :__j . . . . . . . . . . . : . . . : . : : : : CHANN L BOTTOM : i -I : 10,000 20,000 30,000 LRX 57 RA TI NG CURVE(Z) 0 GOLD CREEK DISCHARGE ( CFS) FIGURE E .2 . 151 t...__; c__:, L____, l___... '------' (_J [_] f- UJ UJ u. z 622 620 618 0 616 i= ;; UJ _j UJ 614 612 LEGEND: PRE-PROJECT ---WATANA OPERATION [ n 1 ELEVATioN cHANGE • • • • • • • EXTRAPOLATED f- UJ UJ LL z 622 620 618 0 616 f-;; UJ _j UJ 614 612 MAY JUN JUL AUG SEP MAY JUN .JUL AUG SEP MAY JUN JUL AUG SEP MINIMUM FLOWS MAXIMUM FLOWS NOTES: I. WATER SURFACE ELEVATION ABOVE RAT ING CURVE 2. RATING CURVE BASED ON GOLD CREEK DI SCHARGE AND OBSERVED 1982 WATER LEVELS (ADFS G 1982). MEAN FLOWS WATANA OPERATIQI\I:MONTHLY AVERAGE WATER SURFACE ELEVATIONS AT RIVER MILE 130.9 L--..i :__) :..__:) ~ : . : . . . : . : CHANN L BOTTOM AT EL. 605 .5 . 0 10,000 20,000 30,000 LRX 35 RATING CURVE(2 ) GOLD CREEK DISCHARGE (CFS) F IG URE E.2. 152 1- I.&J I&J u. z 0 55'8 556 554 i= 552 ~ I&J _J I&J 550 548 NOTES: L.____.. (___j L_. LEGEND: PRE-PROJECT ---WATANA OPERATION MAY JUN JUL AUG SEP MAXIMUM FLOWS I. WATER SURFACE ELEVATION ABOVE RATING CURVE 2 . RATING CURVE BASED ON GOLD CREEK DISCHARGE AND OBSERVED 1982 WATER LEVELS ( ADF a G 1982). [___. L..J L 1: : I ELEVATIO N CHANGE .. • • • • • EXTRAPOLATED MAY JUN JUL AUG SEP MEAN FLOWS MAY JUN JUL AUG SEP MINIMUM FLOWS 1- I.&J I&J LL z 0 558 556 554 i= 552 ;; I&J _J I&J 550 548 WATANA OPERATION= MONTHLY AVERAGE WATER SURFACE ELEVAT IO NS AT RIVER MILE 124.4 L_) ::..___j) ::....___] .., .. . . . . · /. v I v / ·. : ( ' : /CHANNE BOTTOM 0 10,000 20,000 30,000 LRX 28 RATING CURV~2 ) GOLD CREEK DISCHARGE ( C FS) FIGURE E.2.153 90 80 70 1\. \ !4---INFLOW ~ 60 (.) 0 gso ~ II .~ I l~U!~LOW ---~ ' I "J 20 Vi \ L OUTLET FACILITIES AT FULL CAPA- CITY (ASSUMED POWERHOUSE FLOW I 10 7000 CFS) 1--~ \ POWERHOUSE AND OUTLET 0 0 2202 2200 -2198 1-w w lL ~ 2196 z 0 ~ ;g 2194 w ...J w g; 2192 0 > 0:: w i3 2190 0:: 2188 2186 5 FACILITIES OPERATING (MATCHING INFLOW) - 10 15 20 25 TIME (DAYS) 1:50 YEAR FLOOD (SUMMER) 30 \MAX WSEL = 2193.0 ~ / ~ I \ 1\ OUTLET ~I \ FACILITIES AT FULL CAPACITY r/ l ' , .... V"POWERHOUSE AND OUTLET FACILITIES OPERATING (MATCHING INFLOW) 2184 0 5 10 15 20 25 TIME (DAYS) 1:50 YEAR FLOOD (SUMMER) 30 35 35 180 160 140 (f) u. 120 (.) 0 0 0 100 w ~80 <l: I (.) ~ 60 0 40 20 0 (\ OUTFLOW ' ' ) I ~:INFLOW ~1 0UTFLOW"' INFLOW-.... .4 MATCHING 1'---r-vr INFLOW V MAIN SPILL WAY J ! OPERATING ft __ J POWERHOUSE AND OUTLET FACILITIES AT FULL CAPACITY 7 ""'POWERHOUSE AND OUTLET FACILITIES OPERATING (MATCHING FLOW) l I I I I I 0 5 10 15 20 25 30 35 2202 2200 f: ~198 w w u. z 2196 0 ~ <l: ~ 2194 ...J w 6 2192 > 0:: w ~ 2190 0:: 2188 TIME (DAYS) 1: 10,000 YEAR FLOOD r MAX WSEL 2193.3 ____! ~ -4----JNFLOW EXCEEDING _ I \ OUTFLOW CAPACITY MAIN SPILLWAY OPERATING (MATCHING INFLOW) I II QUTLET FACILITIES AT j __......-FULL CAPACITY ~ POWERHOUSE AND OUTLET FACILITIES OPERATING (MATCHING INFLOW) 2186 2184 0 5 10 15 20 25 TIME (DAYS) 1:10,000 YEAR FLOOD WATANA 30 35 FLOOD DISCHARGES AND RESERVOIR SURFACE ELEVATIONS 360 320 280 ~ 240 (.) 0 g 200 w ~ 160 <l: I (.) ~ 120 0 80 If'~+ '\/OUTFLOW INFLOW--.. ~ r. \ /l \; ,., ~ I ~EMERGENCY~\ ' SPILLWAY \ ' ' OPERATING ' , I I ~ -- I i \ II I MAIN SPILLWAY I v OPERATING !.! POWERHOUSE AND OUTLET -~-{(. FACILITIES AT FULL CAPACITY 40 0 ~ !----OUTLET FACILITIES OPERATING 0 5 10 15 20 25 30 35 TIME (DAYS) PROBABLE MAXIMUM FLOOD 2202r--,---.--,--,---.--.---~ 2200 1------1---llf--,..._...--lr--........1---__:::,_+--::-1----t-----1 'EMERGENC~I\ 1-2198 1---+--~-SPILLWAY --ll-\--\-+----1 ~ OPERATING \ z 2196 1---+--++-----+--+---++---+---l Q \ ~> I w 2194 1----1--l--l---+---+---l----1-+-----l ...J I W I I 0~ 2192 I ~ \ \ ~ ~ \ ~ 2190 1---+-+--+>\"M_A_I-'-N-S_P_IL_LJ.W_AY-,-0-ULT-L-ET--4---1 FACILITIES AND POWERHOUSE 2 188 1---+-lf---t--O_P_E,R_A_T_I N_G-,-----,------,---1 I I 2186 1---1-1-J+-, ~OUTLET FACILITIES AT --+-----1 ~ r-FULL CAPACITY 2184 L....---1....--L....-1_____:_1 __ ..~.....-I--~. _ ____..._ _ __.~ 0 5 10 15 .20 25 TIME (DAYS) PROBABLE MAXIMUM FLOOD 30 35 FIGURE E. 2. I 54 100 90 80 70 60 50 Cl) LL. u 0 40 0 0 UJ 30 (!) a: <t :r: u Cl) 15 20 10 l . l - r 1/ / / ~ "" 1.02 1.11 1.25 2 5 RECURRENCE INTERVAL (YEARS) NOTE: BASED ON WEEKLY RESERVOIR SIMULATIONS. IO 20 GOLD CREEK ANNUAL FLOOD FREQUENCY CURVE WATANA OPERATION 50 IOO - -I FIGURE E.2.155 -en ~ u 0 0 Q - LLJ (.!) a:: <t I u en 0 J aa---~,-r~~,~,~,--~,--~,,--~,--~,-~,,--,~~,--~,--,~,--~l--~lf~~,--~,-~,,~,--~,--~,~I-.,--.,--,,,,-,-,-.-,,,ITI''--,'--,I-"I'--,'--'''T'Tr--r-1-lr-' -LEGE ND: - GOLD CREEK PRE-PROJECT FLOW 80 .___ · · • · · · • · WATANA OUTFLOW ---GOLD CREEK POST-PROJECT FLOW - n ·~--------------------------------------------------------~----------------------------------------------------------------------------~ - 64 ~ - 56 ~ - 48 ~ - 40 ~ - l I 32 ~ vv 24~--------------------------------~)4\-----'~'-~4-------------------------------------~-~\ \j \N\ I \ ~ - ,, \ J'\1\ A 16~------------------------------------~~~--~~~,------~~v--~v~v~:~~-----------------------------r~--~~ -:-r" ~ \ t..., """... -f-r:-. ....-.-.-."' I \ ,.-, A "" .,, / _....., ;-·....._ ___ _/ - \ . . . . \ I ,.,..., ,..,. "' v . . .... .! ...... ,......_,....... ................ """\ : ..•..•.••. jJ. •.•.•. ~ • 1.-. . • . . . . . . . • •. . . . . . . . . . I ... -,......._ ;I ~------------------~-~~~~--~~~-~~~-~~--~~~==--------------~--~--~~------------+-·~rT---~----------------~~~~-~~~1~ '~------------~~-------------4 • ~ -~-·-·--....~~,..d '-.... f:.:~>_j r....~~~~~~-~~~=,..,.r~ - o~~~~~±:==c==c==~·==~~===d'==L=~==~·==~:J~~-UII __ L_I~I--~Ijf~I--~IL-_Lil_I.L_t~l--~1-~li ___ IL__LJII_LI __ ~l--~l_li_L_I_L_I~I~~r.::Jl~=~C:J JANUARY FEBRUARY MARCH APRIL NOTE : TIME SCALE IS IN INCREMENTS OF 10 DAYS. MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER MONTH 1964 WATANA AND GOLD CREEK FLOW SIMULATION USING 1995 DEMAND FIGURE E.2 . 156 l _j (i) LL. (..) § ~ ILl (.!1 0:: < ::r 0 (/) 0 88 80 72 64 56 48 40 32 24 16 8 0 I I I I I I I I I 'I I -LEGEND: GOLD CREEK PRE-PROJECT FLOW -· ........ WATANA OUTFLOW ----GOLD CREEK POST-PROJECT FLOW f-- - f-- 1-- 1-- 1- 1- f-- 0.:."':\ ':-:-.-:: .-:-: .~ 1--' '::-.:-: .-:-:.-:-:.-:-:.-:-.. -:. ~ '=':,"':".':"'. ~ ~--:".':"':':"': -~·':"'::':": ~-.,..... ~ I I I I I I I I JANUARY FEBRUARY MARCH NOTE: TIME SCALE IS IN INCREMENTS OF 10 DAYS I I I I T TT I I I I I I I I I I I I I I I I I I I I - n ~ \\ 1'\j ~ ~ ~~ A\ ~1 ..... t-. w v I\ Ni I l I '~ ~ I t t ! A ~ I ~\ ... ,--.4 l l 1': ,_ I\ J r····: \V f ""J\ j\/ \/t 1\ I . \ I v \ I \ I .... ~J l I \ ~ ,.,,.,\.. j :······ ~-I \,/ 1 "\. f. .... ........................... ! "' I \i 1 \ : ;\,."' ~--I' \ I .. ······· -· =_; 'J vvv \ ·' .... ~ ................................. ······ .; I I I I I I I I 11 APRIL 1 I I I I I I I MAY JUNE JULY AUGUST MONTH 1967 WATANA AND GOLD CREEK FLOW SIMULATION USING 1995 DEMAND ; ~~ L.~"' L.~ . -: ............. ': -""""" ~ ~r··· .. I I I I I I I I SEPTEMBER OCTOBER T T I I I I I - - - - - - - - - p.-::.-:-: t:"-----------.J , ...... ············· ............... - I I ...... - I I I I I I I NOVEMBER DECEMBER FIGURE E.2. I 57 -(/) ~ u 0 0 0 -w (!) a:: <! ::r (.) (/) 0 88 I I II 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 ,_ LEGEND: - GOLD CREEK PRE-PROJECT FLOW ·• • •• · · • ·•· WATANA OUTFLOW 80 f--- ---GOLD CREEK POST-PROJECT FLOW t--- 72 ~ - 64 ~ - 56 r-- 48 1---- 40 t--- ~ n ~ t- lA - 1 ~ A I '\ v v Lf\ r-A~ - \ 1 v ..._, • \...IV fV"\,.-~.r~ -1---/\ (\ r' ....... .. . \ A ""'./\ ... ."\. f\Av-... / \.1', r' 1~ I .••... / .......... / k _A I ..... ---~ 32 24 16 8 '\-! ... LV..~.~.-:-::~.~~-:-:-::~~ ... ~ ....... ::::-:-::-.~ ..... ---------------------~----~ ····· ~----_...,_ ......... · · ................. . . .. . . . . . . . . . . .. . . . . . . . . .. . ... · -1--- I I .I l I I d r I " I I I I I I _l l J l 11 j j l I I I I I I I l~ 0 JANUARY FEBRUARY MARCH APRIL NOTE·. TIME SCALE IS IN INCREMENTS OF 10 DAYS. MAY JUNE JULY AUGUST MONTH 1970 WATANA AND GOLD CREEK FLOW SIMULATION USING 1995 DEMAND SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E.2.158 j J J Ill IL (.) UJ C) a: c{ :z: (.) Ill c 10!5 8 6 4 2 104 8 6 4 2 103 ............ -.. 1'--1'--- 8 6 4 2 J~NUA~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10!5 8 6 4 ' 2 -', --r-- -104 \ r-. (f) LL. ~ UJ C) a: c{ :z: (.) (f) c 8 6 ·- 4 2 103 8 6 4 2 JU 1 NE 102 0 10 20 30 40 50 60 70 80 90 100 %.OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 -104 l- (f) LL. (.) UJ C) a: c{ :z: ~ c 8 6 4 1"--.. 2 103 !'---....._ -r---.. r--...... 8 6 4 2 ~VE~BfR 102 0 10 20 30 40 !50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED Ul LL. ~ UJ C) a: c{ :z: (.) Ul c (f) LL. (.) UJ C) a: c{ :z: (.) (f) c (f) LL. .(.) UJ C) a: c{ :z: (.) (f) c 105 8 6 4 2 104 8 6 4 2 103 -.. -.. 8 6 4 2 FE BR~A~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 -t-. 2 -r---104 8 ~ 6 - 4 -1"--- 2 103 8 6 4 2 -tU1LY 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 ~ ~--r-· --·-8 6 4 2 103 "'-r---r---r----8 6 4 2 D~CE 1MBfR 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED Ul LL. (.) UJ C) a: ~ (.) (f) c (f) LL. (.) UJ C) a: c{ :z: (.) (f) c (f) LL. (.) UJ C) a: c{ :z: (.) Ul c 105 8 6 4 2 104 8 -- 6 4 2 103 ........... 1--. 8 6 4 2 1MA~CH1 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 ........ 1"--.. ', --r--~ ' 8 - 6 4 2 103 8 6 4 2 I 'uelusr 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 ' ........... "" ' .. ...... 8 6 -4 \ -\ 2 1\. " 103 ' -.. 8 6 \ 4 2 ~N~UA~ 102 0 10 20 30 40 50 60 70 80 90 100 "'o OF TIME DISCHARGE EQUALLED OR EXCEEDED (f) LL. (.) UJ C) a: c{ :z: (.) (f) c Ul LL. (.) UJ C) a: c{ :z: (.) (f) c 105 8 6 4 2 104 8 6 -- 4 2 '-- 10 3 8 6 - 4 2 AP~IL 102 0 10 20 30 40 50 60 70 80 90 100 o/o OF TIME DISCHARGE EQUALLED OR EXCEEDED 10!5 8 6 4 2 104 ........... r-- 8 -6 ~ ...... 4 2 10 3 8 6 4 2 SE1 PTI~M~ER 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTE: I. CURVES BASED UPON AVERAGE MONTHLY FLOWS FOR 32 YEARS OF SYNTHESIZED RECORDS DERIVED FROM HISTORICAL AND FILLED DATA. Ul IL (.) UJ C) a: c{ :z: ~ c Ul LL. (.) UJ C) a: c{ :z: (.) Ul c 10!5 8 6 4 2 r--I- 104 ,.._ 8 6 ~ 4 \. \ 2 10 3 8 6 4 2 M~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10!5 8 6 4 2 104 8 6 ........... .. 4 -r-. ......._ 2 10 3 8 6 4 2 O~TC~B~R 2 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED LEGEND: PRE-PROJECT FLOWS WATANA OPERATION FLOWS MONTHLY AND ANNUAL FLOW DURATION CURVES SUSITNA RIVER AT WATANA FIGURE E.2. 159 l l J l l l J J J J IO!S 8 6 4 2 104 ~ -8 (/) LL 6 (.) ~ 4 .... (l) a: "" <t 2 :I: r--.... (.) (/) 0 -r-103 1--- 8 6 4 2 102 J~NUAR1Y 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 ........ r--~-. ~ -r----2 " ~ r--..... --104 - (/) 8 LL ~ 6 .... 4 (l) a: <t 2 :I: (.) (/) 0 10 3 8 6 4 2 102 JU 1 NE 0 10 20 30 40 !50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 _104 1-- (/) 8 LL ~ 6 4 ..... ............. (l) r--a: r-<t 2 t- :I: ........ r--...... ~ ~'-.... 0 103 8 6 4 2 102 N~VE~BfR 0 10 20 30 40 !50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 10 4 -8 -(/) 6 (/) LL LL (.) (.) ~ 4 ~ .... .... (l) (l) a: a: <t 2 ~ :I: ....... (.) r--(.) (/) (/) 0 103 r--f--0 8 6 4 2 102 F~BR~A~Y 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 r-... -t---2 " r-. ...... 104 ...... -8 -(/) (/) LL 6 LL (.) (.) ~ 4 ~ .... .... (l) (l) a: a: <t 2 <t :I: :I: (.) (.) (/) (/) 0 103 0 8 6 4 2 102 JU1LY 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 1---~-----8 -(/) Ul LL 6 LL .(.) (.) ~ 4 ~ .... .... (l) ......... (l) a: a: <t 2 <t :I: -:I: (.) r-t--(.) (/) 1--Ul 0 10 3 r........... 0 8 6 4 2 102 D~CE 1MBfR 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 105 10!5 8 8 8 6 6 6 4 4 4 2 2 2 r--.. ... I'--r-t---104 104 10 4 1--- 8 -8 --8 6 -(/) 6 (/) LL -LL 6 I\-(.) (.) -- 4 ~ 4 ~ 4 .... .... (l) (l) a: 2r--.... a: 2" <t <t :I: -r--:I: 2 (.) r-(.) ,...., (/) r-r-(/) 0 r-0 103 r--103 ~ 103 8 8 8 6 6 6 4 4 4 2 2 2 102 1MA~CH1 102 AP~IL 102 M~Y 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 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 10 5 10!5 8 8 8 6 6 6 4 ............ 4 4 2 1'. ........ r-2r-.... .._ 2 I', I'\ --t'--~ 1' .. r-1-- 10 4 --104 -10 4 to-- 8 -8 -8 (/) (/) -6 LL 6 LL 6 r--- (.) ~ ~ .......... 4 4 4 .... .... ......... (l) (l) a: a: <t <t 2 :I: 2 :I: 2 (.) (.) (/) (/) 103 0 10 3 0 103 8 8 8 6 6 6 4 4 4 2 2 2 102 'ue1usr 102 SE1 PT~M ~ER 102 01CT~B~R 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 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 I' 2 j'--... N OTE : L EG E ND : ', " I. C URVES BASED U PO N AV ER A GE MONTHLY PRE -P RO J ECT F L OW S 104 -l\. FL OW S F O R 32 Y EARS OF SYN T H ES IZED WATA N A O PE RAT ION FLOWS ---- 8 RECORDS DERIVED FROM H ISTORIC AL DATA. 6 " 4 '\ "' 2 ......... j"-........ 103 r-..... 8 MONTHLY AND ANNUAL 6 FLOW DURATION CURVES 4 SUSITNA RIVER AT GOLD CREE K 2 102 ~N ~UA~ 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGURE E .2. 160 106 10 6 10 6 10 6 10 6 8 8 8 8 8 & 6 6 6 6 4 4 4 4 4 2 2 2 2 2 10!5 10 5 105 105 10 5 ~ 8 8 ~ 8 ~ 8 ~ 8 en ~ IL. 6 en 6 en 6 en 6 en 6 u IL. IL. IL. IL. -u u u u ........ 4 -4 -4 -4 -4 1&1 1&1 1&1 1&1 1&1 --Cl (!) (!) (!) (!) --~ a: a: a: a: a: t-t::-.... <( 2 <( 2 :t 2 <( 2 <( 2 :I: :I: :I: :I: i' u u u u u en r-~ r--f.---en 1'-en en 1'--en ~ 0 10 4 --1 ... 0 10"' r-... -0 10 4 r-.. 0 10 4 i--0 104 8 8 8 8 8 6 6 6 6 6 4 ....... 4 4 4 ~ 4 -,.....,_ -lo.... """"" t.... r-..... r-!"--!"---r-~ lo.... ...... 2 2 -..... 2 2 2 d~NUA~Y Fl BR~AI y 1MA~CH1 AP~IL M~Y 10 3 10 3 10 3 10 3 10 3 0 10 20 30 40 50 60 70 80 90 100 .o 10 20 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 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 106 10 6 10 6 10 6 10 6 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 ~ 105 10 5 10 ~ 10 5 10 5 en 8 ~ 8 ~ 8 ~ 8 ~ 8 LL en en en en ~ 6 -IL. 6 IL. 6 IL. 6 IL. 6 u u ... u -1"-..... -...... -~-;;;;; I... --~-.--.... -r--u 4 ----I......: 4 --4 -4 ----4 1&1 LlJ 1&1 LlJ LlJ (!) (!) (!) (!) ---i--r::: (!) a: a: a: a: -~ a: <( 2 <( 2 <( 2 <( 2 <( :I: :I: :I: :I: . ..._ :I: 2 -....;~ u u u u u .... en en en en en -·---0 0 0 0 0 --- 10 4 10 4 10 4 10 4 10 4 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 JU 1 NE JU 1 LY 3 'ue1usr SE1 PT~M~ER OCTC B~R 10 3 10 3 10 3 10 3 I I 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 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 30 40 50 60 70 80 90 100 %.OF TIME DISCHARGE EQUALLED OR EXCEEDED "'o OF TIME DISCHARGE EQUALLED OR EXCEEDED "'o OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 106 106 106 8 8 8 6 6 6 4 4 4 NOTES LEGEND 2 2 2 I. CURVES BASED UPON AVERAGE MONTHLY PRE-PROJECT FLOWS FLOWS FOR 32 YEARS OF SYNTHESIZED ---WATANA OPERATION FLOWS ~ 10 5 10 5 10 5 RECORDS DERIVED FROM HISTORICAL en 8 ~ 8 ~ 8 AND FILED DATA. IL. en en u 6 IL. 6 IL. 6 ........ -. u u 4 -4 -4 r-.. f"'. 1&1 LlJ LlJ " .J (!) (!) (!) ·~ a: a: a: <( 2 <( 2 <( 2 :I: ~"' :I: f.-:I: I\ u u t-. r-.. u )'.. en -en r-. .. en r-... 0 10 4 --I-0 ~-~ 0 10 4 -10 . -8 8 8 6 6 ....... 6 I" J 4 r--4 ....... 4 " MONTHLY AND ANNUAL r-.... ......... ......... !"--.. FLOW DURATION CURVES 2 2 2 SUSITNA RIVER AT SUNSHINE N~VE~B~R D~CE 1MB~R ~N~UA~ 10 3 10 3 10 3 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 30 40 50 60 70 80 90 100 J % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGURE E .2 .161 10 6 10 6 10 6 106 106 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 10 5 10 5 10 5 10 5 10 5 -8 8 8 8 8 (J) ---- ~ 6 (J) 6 (J) 6 (J) 6 (J) u LL ~ ~ ~ 6 ---u u u u t--!'I.. 4 -4 -4 -4 -4 LLI Ill LLI Ill LLI " C) C) C) C) ~ a: a: a: a: < 2 ·-< 2 ~ 2 < 2 < 2 :J: -:J: -r--:J: :J: u --1-u -u 1-u ' Ul t-r--Ul --I-1--Ul -I-Ul r-. 1-u 1--~ 1---1-1-1--1--f-. Ul 0 r-. 1--. 0 1-0 0 r-- 10 4 10 4 -10 4 ---10 4 lo.. ._ 0 to4 8 8 8 8 8 6 6 6 6 ..... o;;; 6 4 4 4 4 4 2 2 2 2 2 J~NUAR1Y F~BR~A y 1MA~CH1 AP~IL M~Y 10 3 10 3 10 3 10 3 to3 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 30 40 50 60 10 eo 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 10 6 10 6 10 6 10 6 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 :::::-~ -::-:::: r.:: -r----1----::: r:::: ::::--f::- -10 5 -r---10 5 ·-t:... 10 5 t:--1--. 10 5 r--10 5 (J) 8 -8 -8 -8 -8 LL Ul Ul Ul Ul ~ 6 ~ 6 LL 6 ~ 6 LL 6 u u u --~ .... 4 ----~ -.. ~ 4 4 4 4 r--= :....::::: LLI Ill Ill LLI LLI --C) C) C) C) C) a: a: a: a: a: --r--r--~ < 2 < < < < ..... -:J: :J: 2 :J: 2 :J: 2 :J: 2 u u ~ u u --0) Ul (J) Ul 0 10 4 0 10 4 0 10 4 0 10 4 0 10 4 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 10 3 JU 1 NE 10 3 JU1LY 3 'ue1usr 10 3 SE1 PT~M~ER 10 3 0 1CT\B~R 0 10 20 30 40 50 60 70 80 90 100 0 I 0 20 30 40 50 60 70 80 90 100 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 30 40 50 60 70 80 90 100 %-OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED to6 10 6 tos 8 8 8 6 6 6 · 4 4 4 NOTES: LEGEND: 2 2 2 CURVES BASED UPON AVERAGE MONTHLY PRE-PROJECT FLOWS I. ~ t----FLOWS FOR 32 YEARS OF SYNT HE SIZED ---WATANA OPERATION FLOWS -10 5 10 5 10 5 RECORDS DERIVED FROM HISTORICAL 0) 8 -8 -8 AND FILED DATA . .... Ul 0) ~ 6 ~ 6 ~ 6 ·U u ' 4 -4 -4 LLI Ill Ill ~'\. C) ~ C) r---. C) ,, a: 1--1--a: 1--.. a: < 2 < 2 < 2 :J: r--..... -1--:J: -1--!-.... :J: I\ ....... 0 r---u f--1--u Ul t--....... Ul r--....... ~---Ul ""' .. 0 104 t--t--t-.. 0 10 4 1-.. 0 10 4 t---1--- 8 8 8 MONTHLY AND ANNUAL J 6 6 ..... 6 -FLOW DURATION CURVES 4 4 4 SUSITNA RIVER AT 2 2 2 SUSITNA STATION J J 10 3 ~VE~IfR 10 3 O~CE 1MBfR 10 3 ~N~UA~ 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 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGURE E .2. I 6 2 - - - !""" - -' - 80 60 \ "' \ "" ' 40 20 10 ~ 8 u 0 0 S? -6 LLI (!) a:: <t ::r u 4 ~ 0 ........... --1\, r---- \ -...._ --r- ~ ...._'--.. ....... \ -""' \ \ ~ ~ ~ 2 \ \ \ 0.8 Q6 0.4 0 10 20 30 40 50 60 70 80 90 100 PERCENT OF TIME DISCHARGE EQUALLED OR EXCEEDED LEGEND~ -PRE-PROJECT ----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 - - - ·- - - - ~ I 0 20 / ~ 12/12/80 9/29/80 1//31/80 rJ) a: UJ 1- UJ ~ ~ 40 :I: 1-a.. UJ 0 60 80 0 '\ ' ' 4/30/.:,~ v ~ ---( -' 2 4 6 WATER TEMPERATURE (°C) WATER TEMPERATURE PROFILES BRADLEY LAKE, ALASKA SOURCE: CORPS OF ENGINEERS 1982 8 --- 10 FIGURE E.2. 164 ) ) ) l J 61"1 :&= 50 I ~ X J ---t'IT--· ---r?J ~--x X X"'-~ ,.,. ... r---0 -<:J ,· , 0 / X / 0 i X ,~ '" ..... 0 , 0 ( X 0 1&.1 X II 0 ~ !40 ~' 17\ ~ ( X p ( X 0 "'/ i ' ~~. 0 ,.,." 1&.1 I 0 , ~ / (D / C[30' ~ X C: I :J: (,!) II X J iij ~ ~ :J: 0/ ~ I AI' ~ 0f ~ .. I X X 0l :l) I LEGEND: ~ 0 I -·-JUNE I-PREDICTED 10 ) I X JUNE 18-MEASURED -~ I 0 JUNE 18-PREDICTED X I 0 JULY 14-MEASURED X I ---JULY 14-PREDICTED I 1982 DATA I 04 I I !5 6 7 8 9 10 II 12 13 14 TEMPERATURE (°C) EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES JUNE -JULY FIGURE E.2.165 60 50 20 10 . } / [!]( [!] X ) J l <::1 I -~ I I~ I I ....-- I p r:--u I ~0 ~ .x, fiJI II I ~~ j EJ./ I ~ I 1":'1 I 81 8/i 0 1: 0 ---I /' ~· I 10 I . I i I 6 7 \:) I "' I I I I I I I I 8 9 TEMPERATURE (°C) l X XX _j § X X v-----I X .,-~· ,..,/,..., --'-'-' LEGEND: El AUGUST II -MEASURED ---AUGUST 11-PREDICTED X SEPTEMBER 9 -MEASURED SEPTEMBER 9-PREDICTED 0 SEPTEMBER 21-MEASURED ---SEPTEMBER21-PREDICTED 1982 DATA 10 II 12 13 EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES AUG-SEP FIGURE E.2.166 14 .-en a: w 1-w 60 50 ~40 ::li: g 5 CD w ~ CD <t 30 1-:r: C) w :r: 20 10 . -l l ~---f-.---<: ----r--__ 0 0 0 2 --...._ .... r-..,_ .., "" ! 'V I 0 0 I 0 ~ I <.:.J 01 ~ ~ f!> i l I I I I I I I I l I I I I b 3 4 l X X X X X X X X X 5 TEMPERATURE (°C) . l l I 8 1 I 8 I 8 I ! I 8 i I 8 I I i I~ I It:.! I I : ! LEGEND: /) [!) OCTOBERI4-MEASURED 8 -·-OCTOBER 14-PREDICTED X NOVEMBER 4-MEASURED ( NOVEMBER 4-PREDICTED - I 0 JANUARY 31-MEASURED 8 ---DECEMBER 31-PREDICTED i 1982 DATi I 6 7 8 9 10 EKLUTNA LAKE OBSERVED AND PREDICTED TEMPERATURE PROFILES OCT-DEC FIGURE E.2.167 !""" I"'"' ..... ..... ..,.. ..... ..... I - !""" - .... I-w w Ll.. I I-a... w 0 160 ~' ,, .. ,~ 150 140 130 ' "\ \ t ""' ~ ' 120 110 100 90 80 70 60 50 40 ~PRILI4 ?, ~ : \ ' \ \\ \ '..\ \. .. \ \\.APRIL 15 \ \"-. \'. \ ', \ \ , .. , .. v \ \ \\ \\ \\ \ \ \ \ \ '\ \ \ \ \ \ I , \ APRIL 14\ \ \ \ ' ' \ ' ~ ' \ \ 30 20 \ \ \ \ \ \\ \ \ 10 \ \ 0 0 LEGEND: -~ SITE I FOREBAY 2 TEMPERATURE (° C) --SITE 2 UPSTREAM OF FOREBAY \ 3 ------SITE 3 FINDLAY FORKS(APPROXIMATELY 60 MILES UPSTREAM) LAKE WILLISTON TEMPERATURE PROFILES APRIL 14-15,1982 \ \ SOURCE' B C HYORO 1982 UNPUBLISHED DATA 4 FIGURE E.2.168 - - - - - - .... - .... - NORMAL MAXIMUM OPERATING RESERVOIR LEVEL (EL. 2185FT.) EL 2151 FT. EL. 2114 FT. __ _ EL. 2077 ~T·..:...· __ _ MINIMUM OPERATING RESERVOIR LEVEL ( EL. 2065 FT.) EL. 2040 FT. --- 20 FT. (TYPICAL) WATANA MULTILEVEL INTAKE FIGURE £.2.169 l J J J (.) 0 ~ et:: ::::> 1- <l et:: ~ Cl. ~ ~ 1- 14 12 10 8 6 4 2 0 rf \ RECORDED OUTFLOW'\ TEMPERATURE A A A vvw VV'V\ ~v V\ ~~ 1/vr {W 11 I ' J 'r"----\ ---,-- '\ --~" " ---........... ___ "' /'" '·" \. I j , I 1(\J ,-- I ..J ,M , ( / 'l ~ ~ ,. ... /' .i ' I , ,j 'v ~ ;' .,., v/ II 2 1 JUNE NOTES : I) TIME SCALE IS IN INCREMENTS OF 10 DAYS. 2) BASED ON 1982 DATA ' \ -J SIMULATED OUTFLOW- TEMPERATURE I II 21 31 9 JULY AUGUST MONTH EKLUTNA LAKE RESERVOIR TEMPERATURE SIMULATION JUNTO SEP r-\... 19 ! ~ VJV '(\V 'f\0 ..... __ I \ ---r-...... 1 \,._-r\. SIMULATION RESTARTED I 29 8 18 SEPTEMBER ------~--- I 28 \_ --- 8 FIGURE E.2 .170 l J J J 14 12 10 (.) !?.-8 w 0:: ::::> ~ 0:: w a.. ~ w 1-6 4 2 0 /RECORDED OUTFLOW TEMPERATURE ~ -'~ ' -, -~ 1\ ", ..... ,_ VV' ' ' ' ~ -, ---~ ' ,_ SIMULATED7 8 18 OCTOBER I 28 OUTF L OW 7 TEMPERATU RE 17 NOVEMBER NOTES : I) TIME SCALE IS IN INCREMENTS OF 10 DAYS . 2) BASED ON 1982 DATA . MONTH EKLUTNA LAKE A y_ __ lc I 27 RESERVOIR TEMPERATURE SIMULATION OCT TO DEC ~--A N 1--- 7 17 DECEMBER I 27 FIGURE E.2. 171 - ~~ - - - - - 2200 2150 2100 2050 ~ 2000 ~ ::;; LLJ ...J LLJ 1950 1900 1850 I I r v-- L~ ~-:::::::' k::--::: ;;,. ~- I l I I ' ' -I I I I _J I I 1 I I I ,,I .... ~~-· ::;i"";il" LEGEND: JUNE I, 1981 ---JULY I, 1981 ---AUGUST I, 1981 1800 17~0 2 NOTE: TEMPERATURE PROFILES SIMULATED USING 1981 DATA. ! 3 4 5 6 7 8 9 10 WATER TEMPERATURE (°C) WATANA RESERVOIR TEMPERATURE PROFILES JUNE TO AUGUST II 12 FIGURE E.2 .172 - r- - - r- - - - 2200 \ 2150 ' ', ' '·.: ...... '-I .. 2100 2050 ~~ ~·~ ~ ' i=' ~ w LLJ ~ ~ 2000 \ ti :::> LLJ ..J LLJ 1950 1900 1850 1800 1750 2 NOTE: TEMPERATURE PROFILES SIMULATED USING 1981 DATA. ~~ \ ~ ~ =I I I :I ., II I .I :I ~ I I ~ 4 ,...U I I I I ! I I I _,/ / " ~ / I , v" ,-' l~ ~ ~ I / I I LEGEND: I ----SEPTEMBER 1,1981_ OCTOBER I, 1981 ---NOVEMBER I, 1981 ---DECEMBER I, 1981 -···-DECEMBER31,1981_ • 5 6 7 8 9 10 II 12 WATER TEMPERATURE (°C) WATANA RESERVOIR TEMPERATURE PROFILES SEPTEMBER TO DECEMBER FIGURE E.2. 173 14 12 10 u 0 w 8 a:: ~ 1- <! a:: w a.. ~ w 1- 6 4 2 0 J J /\(\ "-(\ ~~ " ~ ' INFLOW · fA I /' r--_., I ,...., /1 ('" 1--__ ..:./ \\ (11' '\ I ..... ' r-.... ---~r'---A, I I .....__ '-, I ],A....._ ' I ' I I ..... I ' l I ' I I ............ "'\ /" .) I I I .... I ' I I I M''~ I \ J ' ~---., . I ~ ' I \ I I I I I L.lj I " 'I \ kH I ~OUTFLOW _...) • ~ \I '1 tl , ' ' /"'1 I l I ' ' ' I f l j ; I \J I \I I I I \1 l I f J I I 10 20 30 9 19 29 8 18 28 JUNE JULY AUGUST NOTES: MONTH I) TIME SCALE IS IN INCREMENTS OF 10 DAYS. 2) BASED ON 1981 DATA, WATANA OPERATION 3) RUN W4020; WITH OUTFLOW TEMPERATURE FOLLOWING INFLOW TEMPERATURE . 4) JULY INFLOW TEMPERATURES ESTIMATED WATANA RESERVOIR INFLOW AND OUTFLOW TEMPERATURES JUNTO SEP \ I \I ' ~ r f\ v 7 17 SEPTEMBER ' ,, \I l ~ ' j r...., '--', ' \, ........ \ \_ ~ 27 7 FIGURE E.2. 174 14 12 10 u 8 0 4 2 0 ' ' ' '-.. ~ I ...... ....... -----... ..... ~':_TFL/ .... """' .... .... ...... .... ....... ',.., ' ......... .... , ...... '\ \ i'--"'\ \._,. )' ----------------~-------- I NFL/ 7 \ 17 OCTOBER . ___..... 27 6 ____,- 16 NOV E MB E R ....... 2 6 I 6 16 DECEM BE R NOTES: MO NTH I) TIME SCALE IS IN IN CREMENTS OF 10 DAY S . 2) BASED ON 1981 DATA, WATANA OPERATION 3) RUN W4020; WITH OUTFLOW TEMPEFtATURE FOLLOWING INFLOW TEMP ERATURE . WATANA RESERVOIR INFLOW AND OUTFLOW TEMPERATURES OCT TO DEC 26 I 5 FIGURE E.2.175 l 1 J l (.) 0 w 0::: ::> ~ 0::: w a.. :::!: w t- 12 .5 12 .0 11 .5 11 .0 10.5 10 .0 9 .5 9.0 8 .5 8 .0 7.5 ----------JUL 31 --------------- AUG 31 95 .00 101.00 107.00 113 .00 119.00 NO TE: I. MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA . 2 . WATANA TEMPERATURE AND DISCHARGE FROM DYRESM MODEL. (RUN WA4020) 125 .00 ----------.........___- 131 .00 137.00 143.00 149.00 155 .00 161.00 RIVER MILE WATANA OPERATION: DOWNSTREAM TEMPERATURES -JUN TO AUG 16700 173.00 179 .00 185.00 WATANA DISCHARGE (CFS): JUN 15 4410 JUN 30 4210 JUL 15 4130 JUL 3 1 3970 AUG 15 6250 AUG 3 1 2 1000 (RELEASE) FIGURE E. 2 .176 l J l l l J J J J u 0 w a:: ::> ~ a:: w a.. ::2: w 1- 9 .0 8.5 8 .0 7.5 7.0 6 .5 6.0 5.5 5 .0 4 .5 4 .0 95 .00 101.00 107.00 113.00 NOTE: I. MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA . 2 . WATANA TEMPERATURES AND DISCHARGE FROM DYRESM MODEL. (RUN WA4020) 119.00 12500 131.00 137.00 143 .00 149.00 155 .00 161.00 RIVER MILE WATANA OPERATION DOWNSTREAM TEMPERATURES-SEP 167.00 173.00 179.00 185.00 WATANA DISCHARGE (CFSl: SEP 15 12200 (RELEASE) SEP 30 9460 FIGURE E.2.177 l l l l l J J ] (.) ~ w a:: ::::> ~ a:: w 0.. :IE w 1- 4 .0 3 .5 3.0 2.5 2.0 1.5 1.0 0 .5 0 95.00 101.00 107.00 113.00 NOTES: I . MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA . 2. WATANA TEMPERATURES AND DISCHARGE FROM DYRESM MODEL. (RUN WA4020) 119.00 WATANA DISCHARGE (CFS): OCT 15 6110 OCT 31 5820 NOV 15 6580 NOV 31 10070 DEC 15 10540 DEC 31 12 500 125 .00 131 .00 137.00 143.00 149.00 155 .00 161.00 167.00 173.00 179.00 185.00 RIVER MILE WATANA OPERATION: DOWNSTREAM TEMPERATURES -OCT TO DEC FIGURE E.2.178 (.) 0 14 r-------.--------r------~--------~------.--------r------~--------~------~------~------~--------~----~ 12 10 8 6 4 2 0 /'f\ ' -+-T-----+-------1- / ~ 1\ /' ( ,' \ ~IMULATED tl I \ I ~ {' " I \ I r, /'-./\ \ v \ I I I \ ~ .1 rv v \ : v 'l \~\ \ !\ \ v \1 I 10 20 30 JUNE NOTES : I. TIME SCALE IS IN INCREMENTS OF 10 DAYS. 2. OBSERVED DATA FOR SUSITNA RIVER ABOVE FOURTH OF JULY CREEK (RM 131.3) ADFSG 1982. 3. PREDICTED WATER TEMPERATURES (RM 130 .5) DURING WATANA OPERATION USING 1981 DATA. 4 . TEMPERATURES REPORTED ARE MEAN DAILY VALUES. I 10 20 30 9 JULY AUGUST MONTH 19 COMPARISON OF 1981 OBSERVED WATER TEMPERATURES NEAR SHERMAN AND 1981 TEMPERATURE SIMULATION OF WATANA OPERATION 29 rOBSERVED \I I \ ~ I, '"--"'~\ ('""" ~ '~'" i I ~ ' ' ' I 8 18 SEPTEMBER '"'' ( \ I \ ' I 28 FIGURE E. 2 .179 4 .0 3 .5 3.0 2.5 ~ u 0 ~ w 0::: ::l f-2.0 <t 0::: w a.. :::.!: w f- 1.5 Q5 0 .0 95.00 101 .00 107.00 113.00 NOTE: MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA . 119.00 125.00 131.00 137.00 143 .QO 149.00 155.00 161.00 167.00 RIVER MILE WATANA OPERATION: DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURE 4°C 173.00 179.00 185.00 WATANA DISCHARGE (CFS ): OCT. 6770 NOV. 8670 DEC . 10300 JAN . 9400 FIGURE E .2 .IRO (.) 0 w 0:: ::J 1- 4.0 3.5 3 .0 2.5 ~ 2.0 w a.. :::!: w 1- 1.5 1.0 Q5 0.0 APR 30 APR15 --...--------------- MAR 15 ./ / 95.00 101.00 107.00 113 .00 119.00 NOTE: MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA . --- 125.00 ---------.....------------..... ------,. 131.00 137.00 143.00 149.00 155 .00 161.00 167.00 RIVER MILE WATANA OPERATION: DOWNSTREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4°C 173.00 179.00 185.00 WATANA DISCHARGE (CFSl: JAN 9400 FEB 8690 MAR 8100 APR 7480 FIGURE E.2.181 l l l l l l l J 1 J J J J J u 0 w 0:: ::::l r- <l: 0:: w a.. :::!: w r- 4 .0 3 .5 3 .0 2 .5 2 .0 1.5 1.0 0.5 0 .0 95.00 101.00 107.00 113 .00 NOTE: MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA. 119 .00 12500 131.00 137.00 143.00 149.00 155.00 161.00 167.00 173.00 RIVER MILE WATANA OPERAT ION: DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURE 4 TO 2°C WATANA DISCHARGE (CFS): OCT 6770 NOV 8670 DEC 10301 JAN 9400 179.00 185.00 FIGURE E .2 .182 l l l I j J J () 0 w a:: ::::l I- <{ a:: w a.. :::2: w I- 4.0 3.0 Z.5 z.o 1.5 1.0 0.0 95.00 101 .00 107.00 113 .00 119 .00 NOTE: I. MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA . 125.00 131.00 137.00 ~3 .00 149.00 155.00 161.00 le7.00 173 .00 RIVER MILE WATANA OPERATION: DOWN STREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4 TO 2°C 179.00 185.00 WATANA DISCHARGE (CFS): JAN 9400 FEB 8690 MAR 8100 APR 7480 FIGURE E .2.183 l 1 J J J J J r---------------·-·-....... -...... ----------------------------------------------......,....-----------------------, 1-10 w w u... (/) (/) w z ~ u :r: 5 1- 0 ~ 10 w w u... (/) (/) w z :1<:: u ;:: 5 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 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 . ICE FRONT NOV 30 I 110 NOTES: I. BASED ON RESERVOIR OUTFLOW TEMPERATURES STARTING AT 4 °C ON NOV. I AND 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 . 115 ICE FRONT NOV 30 I I I I I 120 125 RIVER MILE 125 RIVER MILE WATANA OPERATION ICE FRONT DEC 5 I I I I I I 130 130 135 ICE FRONT JAN 15 I I I I I 135 SIMULATED ICE THICKNESS AND ICE FRONT LOCATION ICE FRONT DEC 10 I I I I I 140 145 140 145 FINAL ICE FRONT DECI5 I I I I I FINAL ICE FRONT FEB 15 I I I I I 150 150 FIGURE E .2.184 1-w w u.. w (j') <( w a:: (.) 10 ~ 5 w (.!) ~ (j') a:: w > a: 1-w w u.. w (j') <( w a:: (.) ~ w (.!) ~ (j') a:: w > a:: 0 10 5 0 95 100 105 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 95 NOTES: NOV 20 100 NOV 25 -"'"'-' ' '-_.../ 105 I. BASED ON OUTFLOW TEMPERATURES FROM RESERVO I R 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 110 /~ I 110 A I \ I \ DEC 1 5~ \ 115 115 120 RIVER MILE NOV 30 120 RIVER MILE WATANA OPERATION DEC 31 JAN 15 125 130 1\ I \ ........ '-"""" '../ 125 130 RIVER STAGE INCREASE DUE TO ICE COVER JAN 31 135 140 DEC 10 135 140 t\ I \ 1'-FEB 15 I \I Y I v ' \ \ \ \,, 145 VDECI5 \ '\ rUPSTREAM !/ \ LOCATION OF "\. ICE FRONT ' . I L. 150 ---- 145 150 FIGURE E. 2 .185 - r !"""" - - - ~ - - 180 165 150 135 J I v u; 120 lL u 0 0105 0 w ~ 90 <t J: u ~ 75 0 60 L / I 1/ 45 u , 30 15 J _!./ 1/v 0 1.005 2 5 10 20 50 100 1000 10,000 RECURRENCE INTERVAL (YEARS) NOTE: FLOWS ROUTED THROUGH WATANA IMPOUNDMENT. DEVIL CANYON FLOOD FREQUENCY CURVE FIGURE E.2.186 8 q ~ w I ' • 200' DEVIL CANYON AP FROM R SM ,19:~ -25' CONTOURS REFERENCE: ~~~;G~APHY, RETRACED USBR, 1960 COE, 197~e8~-------------WCC, 1978 DEVIL CANYON BORROW SITE G E LIMIT BORROW SIT SED DEVIL NOTES LIES WITHIN PROPO --ROW SITE I. ENTIRE B~~SERVOIR LIMITS. D AIR PHOTO CANYON SED ON FIELD AN AL UMITS MITS BA ERIAL. FIN BORROW SITE L~ OF BORROW MATINVESTIGATIONS. ' '"'"~';~·:~,~rn " offi"' ''"'" SUBJEC ADDED FROM 25 FOOT CONTOUR) ~~:~~~A~OW SITE ONLY. 3. MAP (REFERENCED AUGUST, 1981. 4 . PHOTO TAKEN SCALE l N 3,212.000 SCALE l LOCATION MAP N 3,214,000 J ] LEGEND y SITE LIMITS BORROW /QUARR ---··· .. , '· ON INDIVIDUAL OTE S s SHOWN N._ AND DETAIL TOPOGRAPHY I . FIGURES. "'·. J J N 3,226,000 J J J N 3,230,000 J N 3 ,2;32,000 J REFERENCE: FIGURE E . 2 .188 J J J J 0 0 0 0 0 ~ 0 0 CD {\J U) U) 1.1.1 1.1.1 N 3,212,000 N 3,214,000 QUARRY SITE K N 3,216,000 N 3,218,000 REFERENCE: BASE MAP FROM USGS 1:63,360 ALASKA QUADRANGLE TALKEETNA MOUNTAINS (D-5). COORDINATES IN FEET, ALASKA STATE PLANE (ZONE 4) 0 0 0 U) U) 1.1.1 0 0 0 v U) 1.1.1 oo '!!' ~ 0 0 0 -{\J - U) 1.1.1 ... ....-2400 '--.... '-............, 2300 ACKUP QUARR S , ... ~~ .. t___, x EL.I522' ·~. -------···~ ) ri7DD~·~ ... DEVIL CANYON QUARRY SITE K 0 0 0 -0 (l) 1.1.1 SCALE LEGEND ---MATERIAL LIMITS NOTES I. ENTIRE QUARRY SITE LIES OUTSIDE OF PROPOSED RESERVOIR LIMITS . 2. MATERIAL LIMIT SHOWN IS OUTCROP LIMIT AS DE;TERMINED FROM AIR PHOTO INTERPRETATION . NORTH FACES OF SITES ARE EXPOSED ROCK CLIFFS, AND LOCATION OF SAMPLES. 3 .CONTOURS TRACED FROM ENLARGED, REFERENCE BASE MAP I AT 100 I INTERVALS. 0~~~~~~10~0~~0----~~2~000 FEET FIGURE E.2.189 - - -~ 0 >-(.) z w -Q lJ.._ lJ.._ w - - - - - DISCHARGE ( CFS) 1,800 2,300 94 11,300 13,600 15,200 4,700 6,800 9,000 I I I 90 /\NIT ~ UNITS u:3 UNITS 14 u NITS \/ ~ .,...,.-' "' v I I/ 86 82 78 74 70 100 \ I v \j I 200 300 400 500 PLANT OUTPUT ( MW) DEVIL CANYON -UNIT EFFICIENCY AND DISCHARGE OPERATING RANGE (AT RATED HEAD) '\ 600 FIGURE E.2.190 ..... - ..... I - - - - - - 2200 2190 2180 2170 2160 2150 2140 I-w w ~ 2130 z 0 f= g 2120 w _J w 2110 2100 2090 2080 2070 \ \ \ ' ' ' \ \ \ \ \ \ \ \ ' ' ' \ \ \ MAX YEAR (WY 1956) MEDIAN YEAR (WY 1966) ' / ' / " 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 .... - - - -I -1 - ~ I 1460 1450 I- t::J 1440 ~ z ~ 1430 ~ w ...J w 1420 1410 1400 OCT MAX YEAR ' / ~ MEDI4N (WY 1956) 'v ..{,_MIN YEAR YEAR. \\WYI966) (WY 1970) \ \~ " NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP DEVIL CANYON RESERVOIR WATER LEVELS FIGURE E. 2.192 ,, ,, 4o r---~---+----+----r--~----+----r--~----~---+----+----r--~----+-~1 ~1 +----r--~----+----r--~----~---+----+----r--~----+---~--~~--4----+----+---~ :I r I' I' II I I ~ ~r---4----+----+----r---4----+----r--~----4----+----+----r--~----+-~~--~----+----+----+----r--~----+---~----r---+----+----+-~-r--~----+---~--~ ~ II " u l1 'I nl"'l , ~~~ .... II :: II , p 1'1 1111 fl ("j 2200 2000 20 1:1 ;;; ... u 8 Q -"' 10 "' ~ u ~ 0 5 0 ~ 19!51 LEGEND' c:J INFLOW OUTFLOW l r IL \ ! \~ v 'u' 1952 19:13 19:14 19:1:1 19:16 1957 19:18 1959 1960 1961 \ J \ l J ~ J ~ ( ~ \ " ~ J ~ ~ ; \ \ r \ ( \ r \ ~ \ r \r \ ~ \ f \ ( lJ lJ 1( 1) l( lf lr' 1r' 1r u 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 WATER YEAR WATANA INFLOW AND OUTFLOW i\ f ~ J ~ f ~ ! \ J ~ J ~ ! ~ \ \r \ \ r \I \ r \ ) \ f \ r 1\ _[ u u \ 1r' v 1r' lf v v \J 1950 19:11 1952 1953 1954 19:15 1956 19:17 19:18 19:19 1960 1961 1962 1963 1964 1965 1966 _1967 1968 1969 1970 1971 WATER YEAR WATANA RESERVOIR ELEVATION n J\ j\ )~ ~ \ J\ \ ~\ n \ ~\n .I\ J\ ~ l\ n .~ ~~~ n \ n ¥ ~ llu ~ ~ IJl ~ LJi n r I ~ \ ~ If ~ u i/ In n .nl ln l r n lrl_ n u ut ~ lr ~ ~ ~ I Ul u lj ~ 1Jl li' 19:10 1951 1902 19:13 1904 19:15 l!r.56 1957 19:18 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 WATER YEAR NOTE' DEVIL CANYON INFLOW BASED ON 2010 ENERGY DEMAND 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 ~ ~ ~ h ~~ IL f \ r h ! i\ J ~ \ \ r \/ \ ) \ ( \ jf \r \ \ r u v l( 1J 1f 1f li' 1J l( l( 1972 1973 1974 1975 1976 1977 1978 1979 1980 19111 \~ J\ )~ ~\ \ ~\ u u )1] \ In~ '\ l nnJ In_ I In nil U1 1J v 1J ) u l Lf L.r' ~ 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 WATANA AND DEVIL CANYON SIMULATED RESERVOIR OPERATION FIGURE E.2.193 20 15 II) "-u § "' "' a: 10 "' :r u "' i5 5 0 1475 >= "' ~ ~ 1425 "' _, "' 137& 40 II) "-u 0 ~ 30 "' "' a: c :r u "' i5 20 10 0 J~ l n n ~ lflJl 111110 1951 -- 111110 ~ [1 ,JI i I I I I I I I : I .J I ~~ fi : n -;:) (l_,)J '-..." ~~ 1950 1951 LEGEND • c=:.J PRE L:]POST NOTEo j\ ~ 1952 r------1 J 1952 n II II II I~ II II I~ I I I I I I I ~ ln ~lJ' ; \j 1952 ~~ l 1\ ~ ~ .n ~ 1953 1954 1955 r---------, ------, l 1!153 19 54 1955 I ,, ~ n L r: ,, ~::r I 'I 1111 I ,, I U I I I~ j I I I I I I I ,.1 I I I I I I I I I ['-, n n 1\ n ~'!'In 'iU' J 1~' wr ~ I i \._,) ,\J 1953 1954 1955 BASED ON 2010 ENERGY DE MAND 1\ J \ 1r u ~r 1956 1957 I 1956 1957 n I L, II · 'I I I ,, I I I , I I 'c., I I I I I I I ~ I I ~ I I I ) I !r\!n~ ,I\f1\l 'I ~ ~u I ~ I \.J I I ... I _ .. 19~6 1957 I I I I I I I n J\ n 1(\ J\ 1\ 1 ~\ r l\ nn ~ ·~~ n )\ n n I 1 \n~~J\ n ~ .n 1\ 1\ n \ n L J II ~ LJI r IW \ r ~ uul / u ~l l ~I \ ll ~ 1 ~, n} LrJ ln n fl nnJ n_ r ~ 1 u L v~ lv1 ~ u LJ L, lr U L 1 LI ~ 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 WATER YEAR DEVIL CANYON OUTFLOW r----------, r------, ------, i---,---,r ,--------,n r------1 ,------,.. ,-----------, I,-----.. --------, r---,-----, ------, 1,-----..r lll l l u u lJ ~~ l l l 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 WATER YEAR DEVIL CANYON RESERVOIR ELEVATION ~ i' I :! I n I I I II 1: II d ., '1 II 'I I I !I ,, ~ It ~ I II 11 ,, II 'I n 'l It [1 ~ ~I n II I II ,, II r; II~ II I II II I I II " I I I :: ,, ,,, ii II II ,, :~ r' I ,, tl n I I ,, II ,, tl n ,, ,,, I~ II' I II r II I I 'I ,, II, ,, ~I I I ,u, lilt I t II I I It II II r, 'I II ,, I I r : I I I ~ I~ :,, I I ,, I I I ,u, I~ I II I I ~ I tl :I it.., rr: ,, I I ,: II I ~ I I I I II I ro I 1 II ,, ,, ll : ~ I I I I I I I 1 It ,,~ I I I II I I ~I ,, II I I I I L I I I I I I I 1 I II " ~ I I ru, 1--I I II "I I I I c, : L, ,lfl r'l [1 I 1 I : I 1 I I I I I I 1u1 I I I I I " I I I I I I I ~ I '1 I I n I I I I I I I I I I I I I I r, I r l I I rl ,J i : __ : I I I I I ) I I I I ~ I : ~ I I I I I 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 1 ! I l --. f---·-r- I I I 1 I : I I 1 I I I I I r' I I I I I ~ I I 1 I I I I I I I I r\; 1$ ~ n ll ir\: niJ\~n f\m 10.~ lr\ ~fi lt; ~[ I I n I t\nn It-, I r1 f f\r:~ I I [\,h [\I ~ n in A.lrul n I ,.~ n : n :n : ~ l n· !fUl In 'fl 1 11Jt ~~IJ !U' ~ 1 U' il ~I ~ ~u " ~~ ~ ~JU' v~ I ' )1(.J ~· N~ i uo ~ \jj' N{U' N ~ 1-Jt ~~· 1 v· ~~ v· ' I I I I • I I 'I I ' h h l I I ' f I I ,, I I I ~) I I I , r I I I I ~ l I I ~ I \1 "-J I I I I I I ~ \J I~ \J l f., I "-..) \.j ~ I f \..J \j v "-.J 1._) \.J I I l_j v "...1 u t........J \.J '-.) $. 1958 195 9 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 WAT ER YEAR GOLD CREEK PRE-AND POST-PROJECT FLOW WATANA AND DEVIL CANYON SIMULATED RESERVOIR OPERATION FIGURE E. 2.194 c.._:; c__: L_j L--J LEGEND: ------PRE-PROJECT L--...1 '--- - --WATANA/DEVIL CANYON OPERATION ~ L.J _j I " ELEVATION CHANGE .. .. .... EXTRAPOLAT ED 756 I z ........ , .. 754 752 1--w w lL ~ z 0 i= 750 <{ > w _J w 748 746 NOTES : MAY JUN JUL AUG SEP MAX IMUM FLOWS MAY JUN JUL AUG S EP MEAN FLOWS r-J MAY JUN JU L AUG SEP MINIMUM FLOWS :__.] :__:] c.._] 756 754 v 752 v 1--w w LL. -/ z : . 0 i= 750 <{ : > w _J w : 748 . . . :' /CHAN EL BOTTOM f/ 746 0 10,000 20,000 30,000 LRX 57 RATING CURVE(2 ) GOLD CREEK DISCHARGE ( CFS) I. WATER SURFACE ELEVATION ABOVE RATING CURVE WATANA/DEVIL CANYON OPERATION= MONTHLY AVERAGE 2. RATING CURVE BASED ON GOLD CREEK DISCHARGE AND OBSERVED 1982 WATER LEVELS (ADF 8 G 1982 ) WATER SURFACE ELEVATIONS AT RIVER MILE 142.3 FIGURE E.2.195 L__; L___., L-.....: L--L__j LEGEND: PRE-PROJECT POST WATANA/DEVIL CANYON OPERATION 6 2 2 1 t,,,,.·.·,·.·.·,·.·.·,·,,,,,,,,,,,,.: .... ·: ,,,,,.J,,,,., ... ·.·.·:····,,,,j 1 620 LJ __; I { I ELEVAT ION CHANGE .... • · ··· EXTRAPOLATED ~~-) c.:J 622 620 618 ~}'}':::t;;;:W'U::':'':\:>:1 I I I E :: :>:1' :::::::::::::::::1 ':\>:\:1-----1 I 1//:::::::::::,:::J::,:::::::::::::J:\\'' ::] -I 61f ~ I I I I I I ~ ~ 6161 614 612 NOTES : MAY JUN JUL AUG MAXIMUM FLOWS SEP 121 4 I I I ~ I l II -;616 ·.·.-....· ::~}~<Ji/} LLJ 614 612 MAY JUN JUL AUG SEP MAY JUN JUL AUG SEP MEAN FLOWS MINIMUM FLOWS LJ ;:___] :..__) . . . . : CHANNEL BOTTOM AT EL. 605.5 . I L_ 0 10,000 20,000 30,000 LRX 35 RATING CURV~2) GOLD CREEK DISCHARGE ( CFS) I. WATER SURFACE ELEVATION ABOVE RATING CURVE 2. RATING CURVE BASED ON GOLD CREEK DISCHARGE AND OBSERVED 1982 WATER LEVELS(ADFSG 1981). WATANA/DEVIL CANYON OPERATION= MONTHLY AVERAGE WATER SURFACE ELEVATIONS AT RIVER MILE 130.9 FIGURE E.2.196 c._; L.__ (_J L___) ...______ ~· LJ L____! c....J LJ [_J ..____] ~ ~ 556 554 I-w w l.L. ~ z 0 ~ 552 w _J w 550 548 NOTES: LEGEND: MAY JUN JUL AUG MAXIMUM FLOWS I. WATER SURFACE ELEVATION ABOVE RATING CURVE. 2. RATING CURVE BASED ON GOLD CREEK DISCHARGE AND OBSERVED 1982 WATER LEVELS (ADF S G 1982). SEP MAY I .1 ELEVAT ION CHANGE ...... ··· EXTRAPOLATED JUN JUL AUG SEP MEAN FLOWS MAY JUN JUL AUG MINIMUM FLOWS 558 556 554 ~ I-w w l.L. ~ z 0 ~ 552 > w _J w 550 548 SEP / v I v / vCrEL BOTr 0 10,000 20poo 30,000 LRX 28 RATING CURvEf2 l GOLD CREEK DISCHARGE (CFS) WATANA/DEVIL CANYON OPERATION= MONTHLY AVERAGE WATER SURFACE ELEVATIONS AT RIVER MILE 124.4 FIGURE E.2.197 I J 1 ) 360 320 28 0 (/) 240 lL.. ~f':f \\ RESERVOI~ INFLOW / : ~/ ~' OUTFLOW- \ ,¥OUTFLOW ' (.) 0 0 200 ~ w <!) 0::: 160 <( I (.) (/) Ci 120 INFLOW/ \' t ---EMERGENC Y SPILLWAY -OPEN I NG -------FOWERHOUSE LOS ED ----..__ --+ ----- --------OUTFLOW MATCHING 80 INFLOW I 40 0 / POWERHOUSE AND J /SERVICE SPILLWAY OPERATING -t-POWERHOUSE 0 5 10 15 20 25 30 35 TIME (DAYS) PROBABLE MAXI MUM FLOOD 1480 I I RESERVO IR ELEVATION MAX WSEL ~EMERGENCY =1 465 .3~ SPILLWAY OPERATING J 1470 1460 t= lL.. -1450 z :~ / 1\ --- 0 i= \POWERHOUSE \ I OPERATING §! 1440 -----------·---1\ +------ w _J w !:I: 1430 0 > 0::: w ~ 1420 0::: 1410 1400 0 0 1\ I ! I ' ! ! 5 10 15 20 25 30 35 T IME (D AYS ) PR OBABLE MA X IMUM FLOOD 180 160 /"""'\.. I \ 140 (/) 120 lL.. (.) 0 0 0 100 - w <!) 80 0::: <( I (.) INFLOW= N OUTFLOW \ I ~ 1\ ( -............ .. (/) 60 a 40 I 20 K ~f c--MAIN SPILLWAY OPERATING 0 1460 j:: !:=.1458 z 0 i== ::;1456 w _J w !:1::1454 0 > 0::: ~ 14 52 w 0::: I 0 1450 0 5 POWERHOUSE AND OUTLET FACILITIES OPERATING I I I I 10 15 20 25 TIME (DAYS) RESERVOIR ROUTING I : 10 ,000 YEAR FLOOD POWERH OUSE OUTLET 30 FACILITIES AND MAIN SPILLWAY I ·~ OPERATING I _l I I 35 - '--MAX WSEL= 1455- I 5 10 15 20 25 T IME (DAYS) RESERVOIR ROUTING I : 10,000 YEAR FLOOD DEVIL CANYON 30 35 FLOOD DISCHARGES AND RESERVOIR SURFACE ELEVATIONS 50 I I ~ 40 (.) 0 g 30 [/I NFLOW= OUTFLOW v '---.! 1-- w ~ 20 / ~POWERHOUSE AND OUTLET FAC ILITIES OPERATING <( I (.) (/) 10 a I- 0 0 146 0 lL.. -1458 z Q 1-: :3! 1456 w _J w !:I: 1454 ~ 0::: ~1452 w 0::: 1450 0 5 10 15 20 25 i TIME (DAYS) RESERVOIR ROUTING 1:50 YEAR FLOOD (SUMMER) I POWER HOU SE AND /OUTLET FACILIT I ES / OPERATING ( ' 30 \.....MA X. WSEL= 1455 5 10 15 20 25 TIME (DAYS) RESERVOIR ROUTING I : 50 YEAR FLOOD (SUMMER) 30 FIGURE E .2.198 l ) l . ] 100 90 80 70 60 50 (f) Ll.. u 40 0 0 Q w 30 (9 0:: <I I u (f) 0 20 / .<a: / I-" ,. , L;' ..... 2010 ./ / / // ~ / / ~ ( / // / / -_...,; ___ .,. ~o-" ----- 10 1.02 1.11 125 2 5 10 20 50 100 RECURRENCE INTERVAL (YEARS) NOTES: I. BASED ON WEEKLY RESERVOIR SIMULATIONS FOR 2002 AND 2010 DEMAND. GOLD CREEK ANNUAL FLOOD FREQUENCY CURVES WATANA/DEVIL CANYON OPERATION . ] J FIGURE E.2.199 J J -1/) ~ u 88~~,~~,--~,~1 ~1 --~1 -~11 ~1--~1 --~11~~1 -~1 ~1--1 ~,--~,--~11 --~,~,~~1 ~1 ~,--~,--~,~11~~,--~,~1~,--~,-~,1 ~,--~,--~1 -~1 ,--~,~,~1 ~,--~1 --T,-, ~ LEGEND: GOLD CREEK PRE -PROJECT FLOW ' •••••••• •· DEVIL CANYON OUTFLOW 80~ ---GOLD CREEK POST-PROJECT FLOW - - n~--------------------------------------------------------~~-------------------------------------------------------------------------------1 - 64 r-- 56 r-- 0 48 0 Q - IJJ (!) a: < ~ 40 1/) 0 32 24 16 8 0 r-- ~ - \ l II r-- ~ \J ~-·~ I I \ lf\ 1 1 ~\-l~--~~1 - ~ ~--""--------- ,, \ l v ~\f.:···~·: ~ \ I , I \. " I :-:-.-:-.1 ~ ..... '--.. ' I . . ' } ~ • • • ... \ j''"" ~,--~ . .A Lr't"' - ..,--~-~--------.,...-~- ~ ------.---!i ... """"'·· ..... · "Jo:".-::;-.__~.~, .. ~ ......... .. --..... .... ______ ~-~ •••••·• v ~.··. ..._. __ , - l I I JANUARY FEBRUARY MARCH APRIL NOTE : TIME SCALE IS IN INCREMENTS OF 10 DAYS. I I } I I I I I Jl I _l I I I I I MAY JUNE JULY AUGUST MONTH 1964 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2002 DEMAND I I I I I I I I I I l l l I SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E.2.200 l l l l J J J J en LL. (J 8 2 ~ loJ (!) a:: ct :I: u (/) -0 88 80 72 64 56 48 40 32 24 16 8 0 I I 'I I I I I I --LEGEND: GOLD CREEK PRE-PROJECT FLOW · •• • • • · · · DEVIL CANYON OUTFLOW -----GOLD CREEK POST-PROJECT FLOW ~ 1--- 1--- 1--- 1--- 1-- 1--- 1--- 1---_____________ ....,. ___ ---- 1-- I I I I I I I I I JANUARY FEBRUARY MARCH NOTE: TIME SCALE IS IN INCREMENTS OF 10 DAYS II I I 'I I I I f I T I I I I I I I I ' I I ' I I I I I f, .... n ~ \\ r\~ '\11 ~ ~~ 1 I L. .... ~ ..... \-o, I ):1 "'~ "~ ....... 1\ w I \f' \J I I I I I v I I I "" l !\ I ~o,J'~ 1'\ /' I ,._,.. ""' .. I ._,.. '\ V '-,/"\ j I / J --.,J " . -~-----, ..•. :\<···········-······· ......................... :-; ........ -------"'W'L ...... I I I I I I I I I APRIL II I I I I I I I I MAY JUNE JULY AUGUST MONTH 1967 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2002 DEMAND ~ ..... ·\ I . ~~ ... , ~ .... ~ I ~ ~- - I I l 1 I I I SEPTEMBER OCTOBER I I I I I I T T - - - - - - - - - - ______________ ,.,---------- - I I I I T I I I NOVEMBER DECEMBER FIGURE E . 2 . 201 l J J J l -IJ) LL.. u 0 0 2 ~ w (!) a: < J: 0 ~ 0 88 80 72 64 56 48 40 32 24 16 8 0 1 I 11 I I T I I II I I If T T I I I T 'I I I I I I I I I I I I I I I I I I I T T T I I LEGEND: --- GOLD CREEK PRE-PROJECT FLOW ·· ········DEVIL CANYON OUTFLOW ----GOLD CREEK POST-PROJECT FLOW -- -- ~ - ~ - ' f-- ,___ - f'1 ~ ~ f-~A - I A f--A~ I '\; v vl!\ - v ......, \..IV ~~-~---~ f-r . .. . ........ ········ ........... \ - .A ,...... . . ___ ,__.,........._... __ --------r .. ~ ........... -----~~ \...,.., __ /' .... I l A =· -:::-::-::-~-=.r -----------~ ·········-················ ············ -., :.:-.~-~ F-:::1 ~-------.,. ············· ················· .. ... \ --::-::.-d -- I I .I 1 I I I 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 1- JANUARY FEBRUARY MARCH APRIL NOTE·. TIME SCALE IS IN INCREMENTS OF 10 DAYS. MAY JUNE JULY AUGUST MONTH 1970 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2002 DEMAND SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E.2.202 -(/) Ll.. u 88 80 72 64 56 0 48 0 Q w (!) a:: <( ~ 40 (/) 0 32 24 16 8 0 I I II I I II I I II I I f-LEGEND: GOLD CREEK PRE-PROJECT FLOW ........ DEVIL CANYON OUTFLOW f-------GOLD CREEK POST-PROJECT FLOW f- f- f- f- f.- f- f-. ,...__ ~~---------, L , _____ ""'\ -... ___ f- I I 1 JANUARY FEBRUARY MARCH APRIL NOTE : TIME SCALE IS IN INCREMENTS OF 10 DAYS . II T T lf I T I I I I I I I I I I I I I I I I I I I . ~ ~ \ l ( vv /~ ' \j \N\ .. .,I ' ... .A I \ v~~---~~~ \ I '--j' I". . . \ ~ ,: ·..... \ ,. . .., ~ t ....... I \ . · ..... \ \.. .., ("\ ,.._ I il. ·.v. .. -v 1 I A : •••••••• "•i -- '""' -J '~ . . :--"""-' ':":-:-> --vr~ ----"\ --. .... .J. • • . • . . . . . .. . . : ---...... .. ··· .... · I d I I I I I I I I I I I I MAY JUNE JULY AUGUST MONTH 1964 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2010 DEMAND I I I I I I I I I I SEPTEMBER OCTOBER I T T T I I - - - - - - - - - ,__,.,. ---..... --r--................. ! - I I r 1 I I NOVEMBER DECEMBER FIGURE E .2 .203 88 I I I I I I I I I IJ I I ---- LEGEND GOLD CREEK PRE-PROJECT FLOW 80 ~ · • • • • • • • DEVIL CANYON OUTFLOW ---~OLD CREEK POST-PROJECT FLOW f.- ,72 1-- 64 1-- 56 I- til IL. u § 48 11.1 I-- (!) a: <1: 40 :I: 0 ~ 0 I- 32 ---- 24 I-- 16 ~ ....... __ -~--------., II L __________ \. 8 I I I- I 0 I I I I I I JANUARY FEBRUARY MARCH APRIL NOTE : TIME SCALE IS IN INCREMENTS OF 10 DAYS . II l T T f I I I I I I I I I I I I n ~ \\ r\~ 1/1 ~ ~~ 1 : .... ·~ I I I~ ! " w v I' ~ f f I : . r ...... I v ~ ,'\ J "" ,"_. ... _... /"\) """"'--,..,. ......... ., : f\ I • -~ / ... ' r············ .... ~··································L"'"" I ' 1\J r ···· ~ \ I \, • I J -) : .... --.... J.J : : ........ ······· .............. I I I I I I I I I I I I il I I I I MAY JUNE JULY AUGUST MONTH 1967 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2010 DEMAND I I I I I I I I I I I I I I I - - - - - - - Pt - h.] - ~ ________ .......... __ r------:":'1 ...... _ : ... ~"':"::"} ······ ~ ---1 - I I I J 1 J I I I I I r I I I SEPTEMBER OCTOBER NOVEMBER DECEMBER FIGURE E .2.204 88 r- 80 t-- r- 72 t-- 64 - 56 -,___ IJ) lL. u 0 48 0 Q ~ IJ.J t-- (!) 0::: < :I: 40 (.) IJ) 0 t-- 32 t-- 24 t-- 16 t-- 8 1- 0 NOTE ·. 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 LEGEND: GOLD CREEK PRE-PROJECT FLOW ••·• • • • • • DEVIL CANYON OUTFLOW ---GOLD CREEK POST-PROJECT FLOW I IM A n ~ \ A A~ I '\ v VU\ v ....., \...IV :--.... _1 ,.A ~~-----'"-:~-~ ;. ............................... ···~ I i _A --........ ___ ...., ,- -------------~-----~ I I .I JANUARY FEBRUARY MARCH APRIL TIME SCALE IS IN INCREMENTS OF 10 DAYS . -" __;, · •.. ~::: :-: .-~. ~-:::~ ::'::. ~:-::-:::. .......... :::-.-:-.:. ... ~-:-:! I 1 I 1 I JJ 1 _l _lj 1 I I I MAY JUNE JULY AUGUST MONTH 1970 DEVIL CANYON AND GOLD CREEK FLOW SIMULATION USING 2010 DEMAND .. ·~~t~ ----•":"":" ............. ..... -~......, ____ ":":"": ........................ .··· ··············· ... I I I I I I I I I I I I I SEPTEMBER OCTOBER NOVEMBER I I - - - - - - - - - - ~-__..., - I 1- DECEMBER FIGURE E .2 .205 l 10 5 10!5 10 5 105 105 . 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 r-----104 -----10 4 1--104 104 10 4 -8 8 -8 -8 -8 Cll -Cll -Cll Cll II.. 6 Cll 6 II.. 6 II.. 6 II.. 6 (.) II.. I (.) ~ (.) (.) (.) ~ 1~. 4 ~ 4 ~ 4 ~ 4 4 11.1 11.1 11.1 11.1 -11.1 \ (!) (!) (!) (!) ~ a: a: a: a: j <t 2 <t 2 ~ 2 <t 2 <t 2 :I: ............ :I: :I: :I: (.) ..._ (.) (.) ~ ......... (.) Cll r--r--Cll r-Cll ............ Cll 0 -0 t--0 ......... 0 0 103 I--10 3 103 103 10 3 l 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 l 2 2 2 2 2 102 J~N~AR1Y 10 2 F ~BR ~A~Y 102 1MA~C H1 102 A P ~I L 102 M ~Y 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 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 % OF TI ME DISCH ARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF T IM E DISCHARGE EQUALLED OR EXCEEDED 'Yo OF T I ME DISCHARGE EQUAL L ED OR EX CEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 5 105 105 10 5 105 8 8 8 8 8 6 6 6 6 6 4 " 4 4 4 4 -r---.......... ....... 2 2 2 2 2 ..._ r-. r-..._ --t:-:: ............. r-. ', r-. ~ -10 4 10 4 10 4 ' 104 104 ~-----Cll 8 -8 -8 -8 -8 II.. -Cll Cll -Cll Cll ~ 6 -II.. 6 II.. 6 -II.. 6 1'. II.. 6 -(.) (.) (.) (.) -... ~ -~ 4 r--~ ~ ~ roo-4 -~-4 --r -...... 11.1 4 4 --.... 11.1 11.1 11.1 11.1 (!) (!) (!) (!) (!) . ....... a: a: a: a: a: <t 2 <t 2 <t 2 <t 2 <t 2 :I: :I: :I: :I: :I: (.) (.) (.) (.) (.) Cll Cll Cll Cll Cll 0 103 0 103 0 103 i5 103 0 103 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 102 JU 1 N E 102 JU1LY 102 'ue 1 us r 102 I SE 1 PT 1 M ~ER 102 0 1CT?B~R 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 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 4 0 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TI ME DISCH ARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCE EDED % OF T IM E: DISCHARGE EQUALLED OR EXCEEDED 105 105 105 8 8 8 6 6 6 4 4 4 J J 2 2 2 1'-. N OTE : LEuE ND: .......... i'.. I. C URV ES B AS E D U P ON AV ER A GE M ON THLY PRE -P ROJ ECT F L OWS -10 4 f---~-104 ---~ --~-... 104 1', !'-.. FLO WS F O R 3 2 YE A R S OF SY NTHE S I Z E D WAT ANA /DE VI L C A NYON FLOWS ----- Cll 8 -8 -8 RE CO RD S D ER IV E D F RO M H ISTO RI CAL AND II.. Cll Cll -FILLE D D AT A. (.) 6 II.. 6 II.. 6 ~ .(.) (.) \ 4 ~ 4 ~ 4 \ ' 11.1 ....... 11.1 11.1 \ ~, " r----.. (!) (!) a: r--a: I a: ~ <t 2 <t 2 ..... <t 2 :I: :I: -:I: " (.) -r----(.) r--1--(.) Cll en r--r--Cll ~ 0 103 r-.. i5 10 3 ..._ 0 103 ...._ 8 8 8 MON T HLY AND AN NUAL 6 6 6 ~ FLOW DUR ATION CURVES \ J 4 4 4 SUSIT NA RIVER AT WATAN A 2 2 2 102 N~VE ~B fR 102 D~CE 1M BfR 102 ~N~UA~ 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 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EX CEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGUR E E.2.206 l l (/) LL u w (!) a:: <t :J: u (/) 0 10!1 8 6 4 2 104 - - -r------ 8 6 4 2 103 ,...... --r-r--r---8 6 4 2 J~NUAR1Y 102 o 10 20 30 40 50 60 10 80 90 100 'Yo OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 I\. ....... .._ 2 --r-- ..... !'--- _ 10 4 r-....... - (/) LL ~ w (!) a:: <t :J: u (/) c 8 6 -- 4 2 103 8 6 4 2 JU 1 NE 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 -104 f--------(/) LL u w (!) a:: <t :J: u (/) c 8 6 4 r-........ -2 103 -............. r--.... ............ 8 6 4 2 N~VE~BfR 102 o 10 20 30 40 50 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED (/) LL u UJ (!) a:: <t :J: u (/) c (/) LL u w (!) a:: <t :J: u (/) c (/) LL u w (!) a:: <t :J: u (/) i5 105 8 6 4 2 10 4 8 6 4 2 ............ -10 3 8 6 4 2 F~BR 1UA~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQ UALLED OR EXCEEDED 105 8 6 4 ...... --2 -............ 104 8 6 -·- 4 2 103 8 6 4 2 JU1LY 102 o 10 20 30 40 50 60 10 80 90 100 % OF TI~E DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 ----------- 8 6 4 2 10 3 '-... r--............. r- 8 6 4 2 D~CE 1MBfR 102 o 10 20 30 40 50 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED (/) LL u w (!) a:: ~ u (/) i5 (/) LL u w (!) a:: <t :J: u (/) i5 (/) LL u w (!) a:: <t :J: u (/) i5 105 8 6 4 2 104 8 6 4 2 103 ............. 1'----r-....._ 8 6 4 2 1MA~CH1 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 .......... 2 r--r---~ ..... ---10 4 -i----f.-- 8 6 4 2 103 8 6 4 2 'ua 1 usr 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 8 6 4 2 103 8 6 4 2 \ " ' ..... ['... I'-~ '\. '-\. \. '-.. r-....... ~N~UA~ 102 o 10 20 30 40 50 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED (/) LL u w (!) a:: <t :J: u (/) i5 (/) LL u w (!) a:: <t :J: u (/) i5 105 8 6 4 2 104 8 6 4 2 ' ....... r-. r---103 8 6 4 2 APflL 102 o 10 20 30 40 50 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED o ·R EXCEEDED 10 5 8 6 4 2 104 ........ r--1-... .... r-- 8 6 4 2 10 3 8 6 4 2 SE 1 PT 1 M~ER 102 o 10 20 30 40 5o 60 10 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOT E : I. CURVES BASED U PON AVERAGE MONTHLY FLOWS FOR 32 YEARS OF SYNTHESI ZED RECORDS DERIVED FROM HISTORICAL AND FILLED DATA . (/) LL u w (!) a:: <t :J: u (/) i5 (/) LL u w (!) a:: <t :J: u (/) i5 10 5 8 6 4 2 10 4 ........ ....... -r-- 8 -6 4 --~ 2 103 8 6 4 2 M~Y 102 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 8 6 4 2 104 8 - 6 - -I-- 4 -.... ~ 2 10 3 8 6 4 2 01CT?B~R 2 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED LEG END : PRE-PROJECT FLOWS -----WATANA /DEV I L CANYON FLOWS MONTHLY AND ANNUAL FLOW DURATION CURVES SUSITNA RIVER AT DEVIL CANYON FIGURE E.2 .207 10e 105 105 105 105 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 ~ ..._ ----104 ~ -~---10 4 -=-~---t--104 1-----104 104 1-----8 8 -8 -8 -8 Vl -u.. Vl -Vl Vl 6 Vl 6 (.) 6 u.. 6 u.. 6 u.. u.. ~ ~ £ (.) I (.) (.) -- ~ ~ ~ 4 4 4 r---4 4 .... .... .... .... .... C) C) C) C) ~ a:: r-.... a:: a:: a:: <t 2 <t 2 :t 2 <t 2 ....... :t 2 J: ....._ J: ....... "" J: -r--(.) (.) r--(.) (.) -(.) Vl Vl Vl ....._ Vl r---Vl c --.....,_ c c c r--c 103 103 -r--103 -103 -103 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 ' 102 J~NUAR1Y 102 F~BR~A~Y 102 1MA~CH1 102 AP~IL 102 M~Y 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 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 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED to5 105 105 10 5 toe 8 8 8 8 8 6 6 6 6 6 4 ......... 4 4 4 4 ...._ r-r--...... -~----r------2 2 2 2 ....... 2 " """' ,, ~ ' r-r---r----r--........ --r---_ r--r- -104 104 104 -r---·-- -104 104 -en 8 -8 -8 -8 -8 u.. Vl Vl Vl Vl --£ 6 ...... u.. 6 u.. 6 u.. 6 u.. 6 (.) (.) (.) £ ~ ~ ~ -..... 4 4 4 4 4 ---.... .... .... .... .... C) (!) (!) C) C) a:: a:: a:: a:: a:: <t 2 <t 2 <t 2 <t 2 <t 2 J: J: J: J: J: (.) (.) ~ (.) (.) Vl en Vl Vl c 103 c 103 c 103 c 103 c 10 3 8 8 8 8 8 6 6 6 6 6 4 4 4 4 4 2 2 2 2 2 to2 JU 1 NE 10 2 JU1LY 102 0 -10 'ue 1 usr 102 SErT 1 M ~ER 102 0 1CT?B~R 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 20 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 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED 105 105 105 8 8 8 6 6 6 4 4 4 1\. 2 2 2 ............ NOTE: LEGEND: """ ' I. CURV ES BASED UPON AVERAGE MONTHLY PRE-PROJECT FLOWS ----104 -·--I----~-104 ......... ~ FLOWS FOR 32 YEARS OF SYNTHESIZED WATANA I DEVIL CANYON FLOWS -104 ------ en 8 -8 -8 RECORDS DERIVED FROM HISTORICAL DATA . u.. Vl Vl (.) 6 u.. 6 u.. 6 '\. ~ .(.) (.) 4 ~ 4 -4 '\. UJ ............ .... .... (!) -r--(!) ......... C) " a:: r--a:: -a:: <t 2 -<t 2 <t 2 J: ............. J: --J: "'-... (.) (.) r---(.) ............. Vl " en r-Vl c c -....... c !'... 103 103 103 MONTHLY AND ANNUAL 8 8 8 6 6 6 FLOW DURATION CURVES 4 4 4 SUSITNA RIVER AT GOLD CREEK 2 2 2 102 N~VE~BfR 102 D~CE 1MBfR 102 'N~UA~ 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 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED % OF TIME DISCHARGE EQUALLED OR EXCEEDED FIGURE E.2 .208 1 J en 16. (.) 1&.1 (!) a: <[ ::r: (.) en 0 10 6 8 6 4 2 105 8 6 4 2 10 4 --·---I--· ~· -,_ 8 6 4 --- 2 ........ r--to-- J~NUA~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 -10 5 en 16. ~ 1&.1 (!) a: <[ ::r: 0 rn 0 8 6 ·--4 --~ ....;. ...... -... 2 10 4 8 6 4 2 I JU 1NE 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 16. 0 LLI (!) a: <[ ::r: 0 en 0 8 6 4 2 104 --1--r-1------8 6 4 -- 2 N~VE~BfR 3 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en 16. ~ 1&.1 (!) a: <[ ::r: 0 en 0 en 16. 0 1&.1 (!) a: <[ ::r: u en 0 en 16. ·0 1&.1 (!) a: <[ ::r: u en 0 10 6 8 6 4 2 105 8 6 4 2 104 ~ -----8 6 4 2 r--....._ F~BR 1UA~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 10 5 8 6 -1- 4 ------ 2 10 4 8 6 4 2 JU 1 LY 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 8 6 4 2 10 4 ....... --r----r----- 8 6 4 -1----- """' 2 D~CE 1MBfR 3· 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en 16. (.l 1&.1 (!) a: ~ 0 en 0 en 16. 0 1&.1 (!) a: <[ ::r: ~ 0 en 16. (.) LLI (!) a: <[ ::r: (.) en 0 10 6 8 6 4 2 10 5 8 6 4 2 10 4 1------ 8 6 4 ----2 ---1MA~CH1 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 8 6 ~ - 4 ---i"oo... r- 2 10 4 8 6 4 2 'uG 1 usr 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 8 6 ... , 4 ~ 2 10 4 ' 1\: ......... ·-8 6 4 ""' I"'-.. 2 j"'--.... ....... ~N~UA~ 3 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED en 16. 0 1&.1 (!) a: <[ ::r: (.) en 0 en 16. 0 1&.1 (!) a: <[ ::r: (.) en 0 10 6 8 6 4 2 105 8 6 4 2 10 4 r---8 6 4 ---I-- 2 -"" AP~IL 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 8 6 4 '----.. :--- 2 ---t"::'---~ -""'' 10 4 8 6 4 2 SE1 PT~M~ER 3 I O 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTES 1. CURVES BASED UPON AVERAGE MONTHLY FLOWS FOR 32 YEARS OF SYNTHESfZED RECORDS DERIVED FROM HISTORICAL AND FILLED DATA en 16. 0 1&.1 ~ <[ ::r: 0 en 0 en 16. ~ 1&.1 (!) a: <[ ::r: (.) en 0 10 6 8 6 4 2 105 8 6 4 ---r---.... :-.... to-- 2 10 4 -r----~ -......... I -~ ~ 8 6 4 2 M ~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 2 10 5 8 6 4 2 r--1-----r-----r----- 10 4 8 6 4 2 01CT?B~R ·3 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED LEGEND PRE-PROJECT FLOWS WATANA / DEVIL CANYON FLOWS MONTHLY AND ANNUAL FLOW DURATION CURVES SUSITNA RIVER AT SUNSHINE FIGURE E . 2 .209 UJ .... 0 ... C) a: ct :I: 0 UJ 0 10 6 8 6 4 2 10 5 e 6 4 2 10 4 1--.. r-----r-.... -1"----~. 8 6 4 2 J ~N~A~Y 103 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 106 e 6 4 2 ~ t: --10 5 r.:: UJ .... ~ ... C) a: ct :I: 0 ., 0 e 6 ..... 4 2 104 8 6 4 2 JU 1 NE 103 o 10 20 30 40 5o 60 10 eo 90 100 %.OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 -105 UJ .... 0 ... C) a: ct I 0 UJ 0 e 6 4 " 2 104 ~ ~-·-f"... -r-t-r--t--1--r-. r--..., e 6 4 2 N~VE ~Bf R 3 10 0 10 20 30 40 50 60 70 80 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 10 5 e UJ 6 .... £ 4 ... C) a: ct 2 :I: 0 UJ 0 10 4 ..... --1--1----I-f-..~ 1-.. e 6 4 ....... 2 F~BR~A~Y 10 3 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 """-::: F:=.:: -----.,. --10 5 UJ e ~ • 6 ... (!) a: <I :I: 0 UJ 0 UJ .... ·0 ... (!) a: <I :I: u UJ 0 4 2 104 e 6 4 2 JU 1 LY 103 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 105 e 6 4 "' 2 l<f .... ~ .. lo.. ~'-· t-~ r-r... r-..... " e 6 ........: 4 ~ 2 D~CE 1MBfR 3 10 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED UJ .... 0 ... C) a: ~ 0 UJ 0 UJ .... 0 ... C) a: ~ ~ 0 UJ .... 0 ... (!) a: <I :I: u UJ 0 10° e 6 4 2 10 5 e 6 4 2 10 4 I-!-• t----t----1--lo-. e 6 4 2 1M A~CH1 10 3 o 10 20 30 40 5o 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 105 ~ r-1"' .. ~--~ e -- 6 4 2 104 e 6 4 2 'uG 1 usr 10 3 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 106 e 6 4 2 10 5 ~ t::-.. e 6 ~ .... 1 4 " '.'" 2 10 4 I'\. r-.... f" -. 1'. ,...., r-.. """"' e 6 ...... 4 ~ 2 ~N~UA~ 3 10 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED UJ .... u ... (!) a: <I :I: 0 UJ 0 UJ LL u ... C) a: ~ u UJ 0 10 5 e 6 4 2 104 -!"oo ~. 1-· ·----"""--1- e 6 4 ..... 2 AP~I L 10 3 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 10 5 e 6 -- 4 !"oo ~ -... 2 104 e 6 4 2 S E1 PT~M~ER 103 o 10 20 30 40 50 60 10 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED NOTES I. CURVES BASED UPON AVERAGE MONTHLY FLOWS FOR 32 Y EARS OF SYNTHESIZED RECORDS DERIVED FROM HISTORICAL AND FILLED DATA . UJ .... u ... ~ <I :I: u UJ 0 UJ .... £ ... C) a: <I :I: u UJ 0 10 6 e 6 4 2 105 e 6 --4 --::""o ' 2 10 4 e 6 4 2 103 M~Y o 10 20 30 4 0 50 60 10 eo 90 100 % OF TI ME DISCHARGE EQUALLED OR EXCEEDED 10 6 e 6 4 2 10 5 e 6 4 ........ -II....:!! ~---~... 2 r--== -- 104 e 6 4 2 01C T?B~R 10 3 o 10 20 30 40 5o 60 1 0 eo 90 100 % OF TIME DISCHARGE EQUALLED OR EXCEEDED LEGEND PRE-PROJECT FLOWS ----WATANA/DEVIL CANYO N FLOWS MONTHLY AND ANNUA L FLOW DURATION CURVE S SUSITNA RIVER AT S USIT NA STATION F I GURE E .2 .210 - - - - - - - 80 60 I~ ~ l\ ~ ' \ \ ' ~~ ..... _ \ I-- ~---- 1'---\ -._ 40 20 10 \ -.... -.. _ ...... _ r::::-.:::=4. \ - \ ~ (/) t 8 0 8 6 \ ~ "" "' "' 2 i\ \ \ 0.8 0.6 0.4 0 10 20 30 40 50 60 70 80 90 100 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-2010 DEMAND ANNUAL FLOW DURATION CURVE SUSITNA RIVER AT GOLD CREEK PRE-PROJECT AND WATANA I DEVIL CANYON OPERATfON FIGURE E.2. 21 I I j 38~--------~--------.---------,--------,,--------r--------~r--------~--------~--------r---------r---------r-------~ LEGEND : ---3°/o 34 f--- A 36 ~------~-------+--------r-------~-----~--------+-------~-------+------~--------+---~7~1--r-----~ I I I I -··-25°/o -----50% 32 1--- ----70°/o -·-90°/o ' ----97°/o 30~--------~--------~--------+---------~--------~--------~--------~--------t---------+---------i---~,~--~,-r--------~ ~ ~I 28 l--.--_j__-+----+----+----+--+---+---+----------t-----------t---r---;~,,4;-\ -1 26~------~--------~--------+--------+--------~-------+--------4---------~-------r---------T--.:----,v~-~\,-----j I ~ 24~------~------+-------~------~------+-------+-------+-------~------~-------r-T-----~--t\---j ~ I / g 22 ~--------~--------~--------~----------+---------~--------+---------~---------+--------~----------t--+-------~--~'-'~~·-j 0 w 18 ~ 20 ~--------~--------~--------~----------+---------~--------+---------~---------+--------~----------t-~:r-------t--------j ~ I I 16 I ' !\, I 14 ~~~.----~-------+------~------+------+------~------+-------,~1/ __ ~\\~~-------ff,------~~_/-.~.\~:--~ \ v~~.~~ / ,, r--::.:. : ~~ \ 12 10 6 4 I I I I I I I I I I I I I I I I I I I I I I I 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 WEEK OF WATER YEAR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP MONTH NOTE : ASSUMES 2010 ENERGY DEMAND . WATANA I DEVIL CANYON OPERATION GOLD CREEK DISCHARGES FOR VARIOUS PROBABILITIES OF EXCEEDANCE FIGURE E . 2 . 212 - r- t= LLI LLI r-lJ... z 0 fi ,_ > LLI ..J w - !""" - - - 1500 I I ll ~ l -:::::' .,..:-_::. U_~ ; -~ 1450 1400 r ;( I ~ ~ / 1350 '(/ 1 , I , 1300 ~ I ( I 1250 I I I I I I (), 1200 I I LEGEND: I JUNE I, 1981 ---JULY I, 1981 ---AUGUST I, 1981 1150 f ----SEPTEMBER 1,1981 I I I 1100 0 2 3 4 .5 6 7 8 9 10 WATER TEMPERATURE (°C) DEVIL CANYON RESERVOIR TEMPERATURE PROFILES JUNE TO SEPTEMBER II FIGURE E. 2.21 '3 '"""' I - - ..... ~ f""' - -' i - 1-LLI LLI Lt... - z 0 1-~ IJJ ...J IJJ 1500 I l I I I I r'-1 I ' 1450 1400 I 1350 I ~ ~ rE I . . I f . I 1300 I I I I 1250 l I I 1200 . . . LEGEND: OCTOBER I, 1981 ---NOVEMBER 1,1981 1150 ---DECEMBER 1,1981 - _ ... _ DECEMBER 31, 1981 1100 0 2 3 4 5 6 7 8 9 10 II WATER TEMPERATURE (°C) DEVIL CANYON RESERVOIR TEMPERATURE PROFILES OCTOBER TO DECEMBER FIGURE E.2.214 14 12 10 f/ 8 w 0:: ::::> t 0:: w a.. :::;:; w f- 4 2 0 ~ow-~'---1---~/ ~I lll\ \ I ' I \ I \I \ I \ I ~,... ~ 7 \ I ,, J•,' J ,,,, \( ~ l-1 J t.. ' ...., u \I 10 20 30 JUNE NOTES: I. Tl ME 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 . 9 v I 19 29 8 18 JULY AUGUST MONTH 28 DEVIL CANYON RESERVOIR INFLOW AND OUTFLOW TEMPERATURES JUNE TO SEPTEMBER I 7 -- 17 SEPTEMBER I 27 7 FIGURE E . 2 . 215 l 1 l j J J J j u 0 14 12 10 K 4 2 0 -----....... ~-------""' .. ~- ~ -, OUT F L OW] "' "v-. ~ ----.... __ ..... ---~ --------' R -----...... --... - 7 17 OCTOBER 27 I 6 1\ 16 NO V EMBER 26 I 6 16 DE C EMBER NOTES: MONTH I ) TIME SCALE IS IN INCREMENTS OF 10 DAY S. 2) BASED ON 1981 DATA . 3) WATANA ASSUMED UPSTREAM ~ (DYRESM RUN W4010) 4) OUTFLOW TEMPERATURES ARE BASED ON DYR E SM RUN DCI022. DEVIL CANYON RESERVOIR INFLOW AND OUTFLOW TEMPERATURES OCTOBER TO DECEMBER 26 ...... I FIGURE E.2.2 16 9 .0 ---. JUL 31 ~-8 .5 ---- 8 .0 AUGI5 ------ NOTE : u 0 w 0:: ::J t 7.5 ~ 7.0 c._ ::!: w 1- 6 .5 6.0 5.5 5.0 ---· --JUN30-- 95.00 101.00 I. MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA . 2. DEVIL CANYON TEMPERATURE AND DISCHARGE FROM DYRESM MODEL . (RUNS DC1020 AND DCI021) ---.......:: 107.00 ---- SEP 15 -~-----------__. - 113.00 119.00 125 .00 131.00 137 .00 143 .00 RIVER MILE WATANA I DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -JUN TO OCT 149.00 DEVIL CANYON DISCHARGE (CFS) JUN 15 79 20 JUN 30 5740 J UL 15 6830 JUL 31 6480 AUG 15 9940 AUG 31 24100 (RELEASE) SEP 15 13750 SEP 30 10600 OCT 15 7450 FIGURE E.2 .217 5.5 5.0 4 .5 4 .0 u 3.5 0 w a:: ::> !;:;: a:: w a.. :::!: 3.0 w 1- 2 .5 2.0 1.5 1.0 0.5 L---~--~--~---L---L--~--~--~L_ __ L_ __ L_ __ ~--~---L---L--~--~--~~--~--~--~--~ NOTE : 95 .00 101 .00 I. MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA . 2 . DEVIL CANYON TEMPERATURE AND DISCHARGE FROM DYRESM MODEL. (RUN DCI022) 10700 113 .00 119.00 125 .00 131.00 137.00 143.00 149.00 RIVER M ILE WATANA I DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO DEC 155.00 DEVIL CANYON DISCHARGE (CFS): OCT 31 8690 NOV 15 10300 NOV 30 10500 DEC 15 10900 DEC 3 1 11100 FIGURE E . 2 . 218 l l l l l l J 1 l J J ~ (_) 0 - w 0: ::::J I- <( 0: w CL :::!: w I- 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 .5 0 .0 95.00 101.00 107.00 113 00 119 .00 125 .00 131 .00 RIVER MILE DEC 15 AND DEC 31 13700 143.00 149.00 DEVIL CANYON DISCHARGE (CFS) OCT 7320 NOV 9440 DEC 11,130 JAN 10,480 NOTE : MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON . WATANA/ DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURE 4° FIGURE E.2 .219 4.0 3 .5 3.0 2 .5 u 0 w c:: ::> f-<t 2.0 c:: w a._ ::::!: w f- 1.5 1.0 0 .5 0 .0 95.00 ..- APR 30 ~-------------..-.:::..,.:~::....._------------~R~------ 101.00 107.00 113 .00 119 .00 125 .00 131.00 RIVER MILE 137.00 143 .00 149 .00 DEVIL CANYON DISCHARGE (CFS): JAN 10,480 FEB 10,090 MAR 9200 APR 8010 NOTE : MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON . WATANA I DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES-JAN TO APR OUTFLOW TEMPERATURE 4°C FIGURE E . 2 .220 J J u 0 w a:: :::> ~ a:: w Q. :::E w 1- 4 .0 3 .5 3 .0 2 .5 2 .0 1.5 1.0 0.5 0.0 9500 101.00 107.00 113 .00 119.00 125 .00 RIVER MILE 131 .00 137 .00 143 .00 149.00 DEVIL CANYON DISCHARGE (CFS): OCT 7320 NOV 9440 DEC 11,130 JAN 10,480 NOTE : MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON. WATANA/DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURES 4 TO 2 -°C FIGURE E.2.221 4.0 3 .5 3.0 (.) 2 .5 0 ~ w 0:: ::::> ~ 0:: 2 .0 w a.. ::::!: w 1- 1.5 1.0 0 .5 0 .0 APR 30 95.00 101.00 107.00 113 .00 119 .00 125 .00 RIVER MILE 131.00 137.00 143 .00 149 .00 DEVIL CANYON DISCHARGE (CFS): JAN 10,480 FEB 10,090 MAR 9200 APR 8010 NOTE : MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON. WATANA/DEVIL CANYON OPERATION DOWNSTREAM TEMP E RATURES -JAN TO APR OUTFLOW TEMPERATURE 4 TO 2° C FIGURE E. 2 . 222 J l J 0 0 J j J J J J J J J NATURAL LODGEMENT POINT PHOTO E.2.1 FRAZIL ICE UPSTREAM FROM WATANA PHOTO E.2.2 ICE COVER DOWNSTREAM FROM WATANA SHOWING NATURAL LODGEMENT POINT l l J n l J J J J j J J J 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 SA FREEZEUP,DECEMBER 1982 ] l l J 1 J J l J J J J J PHOTO E. PHOTO E .2.5' SLOUGH 8A NEAR LRX-29 LOOKING UPSTREAM PHOTO E.2 . PHOTO E. 2.6 SLOUGH 8A l l l ] J J J ] J J J J J 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 List List A.l A.2 A.3 A.4 A.5 A.6 A.7 APPENDIX E.2.A RELATIONSHIP BETWEEN MAIN CHANNEL FLOW AND SLOUGH PHYSICAL HABITAT VARIABLES Table of Contents of Tables of Figures Introduction ·Selection of Sloughs Definition of Flow Regimes Main Channel Flow and Physical Habitat Variables of Sloughs Summary of Methods of Analyses Discussion of Results References -i- Page i i i i i 1 1 2 3 5 10 14 - - List of Tables ---- No. Title Page -A-1 Threshold Discharge Estimates 3-1, 3-2 A-2 Mainstem Discharge vs. Physical Habitat 4-1, 4-2, 4-3 Variables, Slough BA """"! A-3 Mainstem Discharge vs. Phys ica 1 Habitat 4-4, 4-5, 4-6 Variables, Slough 9 A-4 Mainstem Discharge vs. Physical Habitat 4-7, 4-8, 4-9 Vari ab 1 es, Slaugh 21 A-5 Mainstem Discharge vs. Physical Habitat 5-l through Variables, Rabideux Slough 5-16 - - - ~I -ii- List of Figures No. Title Page A-1 Slough Location IVlap 2-1 A-2 Map of Slough 8A 2-2 - A-3 Map of Slough 9 2-3 r .~-4 Map of Slough 21 2-4 A-5 Map of Rabideux Slough 2-5 r- - f'""' !'"""' ,- -iii- .- ,-. ,- i~' - A.l 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 cantrall ing berms at the upstream end of the side sloughs are approximately at the water surface elevations of the mainstem for 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 tributaries and/or upwelling 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 1 ower end. Even though substailt i a 1 backwater often exists, the s 1 oughs 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 wi 11 be impacted most by the regu 1 a ted flows from the-proposed Sus itna Hydroe 1 ectri c Project. Numerous add it i anal 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 ~laughs 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·l 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 BA (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-1. 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: 0 0 0 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 the mainstem). In this flow regime, the slough acts as a minor tributary to the mainstem. Regime II-This regime is characterized by mainstem back- water extending 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. 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- - - - - - 21 20 19 CANYON '---LANE CREEK AND SLOUGH 8 SLOUGH SA AND SLOUGH CREEK AND SLOUGH -LEGEND ...... _A USGS-_ Gaging Station CREEK AND SIDE CHANNEL .l...---WH ITEFISH SLOUGH 0 10 MILES Figure A-1 Slough Location Map ···. ..... . .. :-.~:~ .. · .. ~. ···:. :;.~ ..... .... I i ~ ~ ~ 0) ~ ~- ~ ~ .........._ ' "' ..... . f <><! ~ -:.. 1::-..._'<\''-· .. . ' 'l.. ~It~~~ "~i'"' 'U \l.J'}::. 'l~ v.~~~v, ,:., 'l! ' ~ ~ "' \J J... ~ .. ~ f ~ c._; 1 "'~ . .::. '-..1 ~-:-~ I-. 4... ~ <:) .. ~ ~" I~ J ~ I I cy ~ ~ aj ~ ~ ~· l'.J ~ ' ~ ~ ~ '::. ~ . ~ \, ~ ~~ ~ ~~ ~ ~ ~ ~ "" ~ ::: ~ !I.. ::s v. --~ '<:' ~ ........ "' "'a ~ ' ..... "-~ ~:-..... ..... ~ ;,., " () s: '-.J ._, - k__ c::J. - - u -= ui '"" :z ~ -, > = -1 ::::1 en Q ll.l :z 0 a: u -c ~ 2 11.1 a: ~ .. a: 1 'S te~.t't ~o. ~ e~ 9t3A """d 'h~ ~ l 1 ] -sk'St' (t.' (" c ( d ('( -'] l S US I T NA .R I V E R .- fron?ed ) (1'181) Sb SLOUGH 9 .o 1000 FEET C APPROX. ICAI.l) ADF 80 TRANSfCT (19e2.) Q STATION (R&W TAGLINE) WATER QUALITY WEASUREMEMY SITE DA TAPOD S I TE STAFF GAGE Raw STAGE RECORDER SURFACE THERMOGRAPH ~~0 FEET =-" ( appro.11. ac a 11) ~ f:l STAFF GAGE f 1\ A RaM STAGE RECORDER (tl (!J DATA POD ~ (!) THERMOGRAPH I ~ .J ,, ] J • .I ) "I l ) .I ] I "' J .l ] I!'Pf~Ri't I ~ I ~ ? !""'"' I j If; I t( I I~ I t)J I ~ Norr.:: S..dlld "~ .. r-tj¥~~e ... ts ...,~ dtl: .. ..J,J w ~.r.f.~· o. ... ~ ••• ,...."" ... '15) L.• pa.-4· i~ (' ... ~id«•J p.if 0~ ~~~ .2-S ·a......~t"""'""' ,,.,,. •; s ... rf.v• _ . ..,,. ..... t .. ~ RM 83.5i ~j ~~ f\ ;-. -,~ ! I tHIN ~~ Bevs~ '1 -, !"'""' ' - 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-1 along with the ranges of rna ins tern flows which encompass the flow 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 '.-Jithin 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 0 average velocities mid-slou¥?· and sloughs.- at cross-sections at the mouth, near the upstream berms of o total wetted surface area near the 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. ..!/observed lateral velocity distributions and velocity ranges are provided in the Attachment for selected cross-sections (transects). ! I Table A-1 THRESHOLD DISCHARGE ESTIMATES Susitna River Discharge at Gold Creek Slough SA (cfs) Slough Slough 9 21 (cfs) (cfs) Sus itn a River Discharge at Sunshine Rabideux Slough (cfs) Discharge at which mai nstem acts as a hydraulic control of slough water- surface elevation at mouth (Regime II flow begins) 10 ooo-!.1 ' 11 ooo§.1 ' 21 4oc}!./ ' < 10 ooo~/ ' Discharge at which intermediate berm is overtopped (Regime II-A flow begins) Discharge at which highest berm is overtopped (Regime III flow begins) N/A -Not applicable 1/ Field estimate. 26 , ooo~/ l/ 30 ooo~/ ' 32,ooo±1 N/A§j 20,5oo§.1 23 ooo~/ ' 24, sao!_! 26 oo~1 ' N/A§_/ 65 oool.Q.1 ' 2! Based on field observations on June 29, 19S2. 3! "Slough Hydrology, Interim Report,n R&M, Dec. 1982, p. 2-1. 4/ Based on aerial photo. 5! Based upon data in "Preliminary Assessment of Access of Spawning Salmon to Side-Slough Habitat above Talkeetna," E.W. Trihey, Nov. 19S2. 6/ Slough 9 and Rabideux Slough rlo not have intermediate berms. !J Based on staff gage data in "Susitna Hydro Aquatic Studies, §_/ Phase II Base Data Report, Volume 4: Aquatic Habitat and Instream Flow Studies 19S2, Appendix A, Alaska Department of Fish and Game, 19S3,11 Table 4-A-3, p. 4-A-67. "Susitna Hydro Aquatic Studies, Phase II Basic Data Report, Volume 4: Aquatic Habitat and Instream Flow Studies, Part I, ADF&G, 1983," Table 41-3-2, p.43. ~/ Aerial photos indicate Regime mainstem flows of 15,000 cfs. discharges between 10,000 cfs Based on aerial photos. 10/ II flow exists during very low Regime II assumed to occur for and 15,000 cfs. 3-1 - - --! - - - ,'i't>fl~ """ TABLE A-1 (Cont 1 d) REGIME DISCHARGE ESTIMATES Sus itna River Sus itna River Discharge Discharge at at Gold Creek Sunshine Slough Slough Slough Rabideux 8A 9 21 Slaugh (cfs) (cfs) ( cfs) (cfs) Regime I <10,000 <11 '000 <21,400 N/A Regime I I 10,000-11,000-21,400-10,000- 26,000 20 sooY ' 24,800 65,000 Regime I I-A to 26.000-N/A 24,800-. N/A 30 oooY ,. 26,000 • I I-n Regime III. >30,000 >23,000 >26,000 >65,000 l/"Slough Hydrology, Interim Report.11 R&M, December 1982, P. 2-1 Based on aerial photography this flow is estimated to be 32,000 cfs. Y"Preliminary Assessment of· Access of Spawning Salmon to . Side-Slough Habitat above Talkeetna," E.W. Trihey, November, 1982. Based on data in "Slouth Hydrology, Interim Report 11 , 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 1 d Creek were added to the sum of flows from the Chu 1 itna 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 define the 1 ower 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 flows were selected 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 monthly flows from the Chulitna and Talkeetna Rivers to provide a medium flow range at Rabideux Slough. 4 +>- I I--' ·~·. J 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 Discharge Mid-mediate Upstream Mid-mediate Upstream Gold Creek at Mouth Mouth Slough Berm Berm Mouth Slough Berm Berm (cfs) (cfs) ( ft ,ms 1) (ft,msl) ( ft ,ms 1) ( 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 7,000 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 15,000 8 562.5 568.8 N/A N/A 4.2 0.4 0 0 17,000 8 562.8 568.8 N/A N/A 4.5 0.4 0 0 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 1, for narrative and worksheets explaining method of determining slough physical habitat variables. .J o.J I J J .I +::> I N -~ l -···-I 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 305,000 62 54 0 0 9,000 0.06 0.3 N/A N/A 305,000 62 54 0 0 11 '000 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 0 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. l Sheet 3 of 3 Table A-2 (Cont 1 d) MAIN STEM 0 ISCl-iARGE VS. PHYS !CAL HABITAT VARIABLES SLOUGH SA Water Table Elevation Susitna River Mid-Mid- Discharge at Slough Slough Upstream Gold Creek Well A Well B Well (cfs) (ft,msl) (ft,ms l) (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 Applicable Note: See Figure 2 for well locations. See Attachment, Part 1, for narrative and worksheets explaining method of determining water table elevations 4-3 - ~ -· m. - - - -' ~ .--. 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 d~termining slough physical habitat variables. +:> I lT1 Sheet 2 of 3 Table A-3 (Cont'd) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES SLOUGH 9 Average Ve lac ity 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) ( ft/sec) ( 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 15,000 0.2 0.1 N/A 390,000 48 89 0 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 - 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 Slaugh 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 for well locations. See Attachment, Part 2, for narrative and worksheets explaining method of determining water table elevations. 4-6 .t::o I -....) J . --_J Sheet 1 of 3 Table A-4 MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES SLOUGH 21 Water Surface Elevation Flow De[!th -Susitna River Slaugh · Inter-Inter- Discharge 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 11,000 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 13,000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0 15,000 5 744.7 744.9 N/A N/A 1.6 0.6 0 0 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 21,000 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. al1 0 . 27,000 12 745.3 745.3 754.8 755. 5 2.2 0.9 0.2 0. all 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. _ _!_/Flow J See Attachment, Part 3, for narrative and worksheets explaining method of determining slough physical habitat variables. depth is less than 0.05 ft. J C• .J _J .J ... J -__ I ·-· .. J J +::- I co 1 'l -1 -l ') '1 ~~ . --_1 -} --. -1 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- Discharge at Mid-mediate Upstream Surface Mid-mediate Upstream Gold Creek Mouth Slough Berm Berm Area Mouth ~ Berm Berm (cfs) (ft/sec) (ft/sec) ( ft/sec) (ft/sec) (ft2) (ft) ( (ft) ( ft) 1,000 0.1 0.5 N/A N/A 46' 000 50 25 0 0 3,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 5,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 7,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 9,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 1l '000 0.1 0.5 N/A N/A 46,000 50 25 0 0 12,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 13' 000 0.1 0. 5 N/A N/A 46,000 50 25 0 0 15,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 17,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 19,000 0.1 0.5 N/A N/A 46,000 50 25 0 0 21,000 0.1 0.5 N/A N/A 46' 000 50 25 0 0 23,000 0.2 o~7 N/A 1/ N/A 115,000 98 26 0 0 25,000 0.1 0.7 0.0.:.: N/A 155 '000 101 26 3 0 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. llvelocity is less than 0.05 ft/sec. A ! i Sheet 3 of 3 Table A-4 (Cont 1 d) MAINSTEM DISCHARGE vs~ PHYSICAL HABITAT VARIABLES SLOUGH 21 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 Water Table Elevation (ft,msl) (ft,msl) (ft,msl) 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 - -' ,.... t 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 S5,000 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 Ana lyses This section contains a summary of the methods used to derive the following parameters: 0 0 0 0 0 0 0 0 slough discharge threshold discharges water surface elevation flow depth velocity 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 Sloughs SA, 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 SA A map of Slough SA 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 Condition 1-!/ c d"t" 211 on 1 10n -d "t. 311 Con 1 1 on - Oi scharge at Mainstem Slaugh Mainstem Slough Ma i nstem Slough Gold Creek Discharge Discharge Discharge Discharge Discharge Discharge (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) 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 8 13' 000 22,000 0 43,000 0 67,000 20 15,000 24,000 0 45,000 0 69,000 60 17,000 26,000 0 47,000 0 71,000 108 19,000 28,000 0 49,000 0 73,000 165 21,000 30,000 0 51;000 0 75,000 230 23,000 32,000 0 53,000 0 77 '000 300 25,000 34,000 0 55,000 0 79,000 380 27,000 36,000 0 57,000 0 81 '000 468 29,000 38,000 0 59,000 0 83,000 560 31,000 40,000 0 61,000 0 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 """' )lo!ol!( ~. <~ - "" -- ~ ~. /0!01> •• -i -. - Sheet 2 of 16 Table A-5 (con 1 t) 0 MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH -I Condition 1-y d •t• 211 Con 1 1 on -c d•t• 311 on 1 1 on - ~~ Water-Water-Water- Susitna River Surface Surface Surface Discharge at Mains tern Elevation Mains tern Elevation Mainstem Elevation !""" Gold Creek Discharge at Mouth Discharge at Mouth Discharge · at Mouth (cfs) ( cfs) (ft,msl) ( cfs) ( ft ,ms l) (cfs) (ft,msl) r . 1' 000 10,000 255.3 31,000 257 0 8 55,000 260.5 3, 000 . 12,000 255.5 33,000 258.2 57,000 260.7 5,000 14,000 255.8 35,000 258.4 59,000 260.9 r 7,000 16,000 256.0 37,000 258.7 61,000 261.0 9,000 18' 000 256 0 3 39,000 258.9 63,000 261. 2 11,000 20,000 256.5 41,000 259.1 65,000 261.4 r-12,000 21,000 256.6 42,000 259.2 66,000 261.5 13,000 22,000 256.8 43,000 259.3 67,000 261.6 15,000 24,000 257 0 0 45,000 259. 5 69,000 261. 7 ,!""" 17,000 26,000 257.3 47,000 259.8 71,000 261.9 19,000 28 '000 257. 5 49,000 260. o-73,000 262.1 21,000 30,000 257.8 51,000 260.1 75,000 262.3 23' 000 32,000 258.0 53,000 260.3 77,000 262 0 5 25,000 34,000 258.3 55,000 260.5 79,000 262.7 27,000 36,000 258.5 57' 000 260. 7 81,000 262.8 r-29,000 38,000 258.8 59,000 260.9 83,000 263.0 31,000 40,000 259.0 61,000 261.0 85,000 263 0 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. 5-2 I i Sheet 3 of 16 Table A-5 (con 1 t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH Condition 1-l/ Condition 21/ Condition 3-~:/ Water-Water-Water- Surface Surface Surface Sus it n a R i v er Elevation E 1 ev at ion Elevation Discharge at Mainstem at Mainstem at tvlainstem at Gold Creek Discharge Mid-Slough Discharge Mid-Slough Discharge r~id-Slough (cfs) ( cfs) (ft ~ms 1) (cfs) (ft~msl) (cfs) (ft~msl) 1~000 10~000 N/A'J:/ 31 ~ 000 260.3 55~000 260.6 3,000 12,000 I~/ A 33,000 260.3 57,000 260.7 5,000 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 63,000 261. 2 11,000 20,000 N/A 41,000 260.3 65,000 261.4 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 15,000 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 28,000 260. 3 49,000 260.3 73,000 262.1 21,000 30,000 260.3 51,000 260.3 75,000 262.3 23,000 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 27,000 36 '000 260. 3 57,000 260. 7 81,000 263.2 29,000 38,000 260.3 59,000 260.9 83,000 263.4 31,000 40,000 260.3 61' 000 261.0 85,000 263. 7 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 """'· - * ~ -, .,. ~. -I - J""'; - Sheet 4 of 16 -( Table A-5 (con•t) , .... MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH """ I Condit ion 1-y Condition 2Y Condition 3-~/ Water-~vater-Water- Surface Surface Surface Susitna River Elevation Elevation Elevation F Discharge at Mainstem at Upstream Mainstem at Upstream Mainstem at Upstream Gold Creek Discharge Berm Discharge Berm Discharge Berm (cfs) ( cfs) (ft,msl) ( cfs) (ft,msl) (cfs) (ft,msl) ~ I 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 IVA 5,000 14,000 N/A 35,000 N/A 59,000 N/A 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 12,000 21,000 N/A 42,000 N/A 66,000 262.8 13,000 22,000 N/A 43,000 N/A 67,000 262.9 ~ 15,000 24,000 N/A 45,000 N/A 69,000 263.0 17' 000 26' 000 N/A 47,000 N/A 71' 000 263.1 19,000 28,000 N/A 49,000 N/A 73,000 263.1 21,000 30' 000 N/A 51' 000 N/A 75' 000 263.2 23,000 32,000 N/A 53,000 N/A 77' 000 263.2 25,000 34,000 N/A 55,000 N/A 79' 000 263.3 {"""' 27,000 36,000 N/A 57,000 N/A 81,000 263.4 29,000 38' 000 N/A 59,000 N/A 83' 000 263.5 31,000 40,000 N/A 61,000 N/A 85,000 263.8 """ N/A -Not Applicable. ('" -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. 5-4 I i Sheet 5 of 16 Table A-5 {con 1 t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH Susitna River Condition 1·!/ Condition 2l/ Condition 31/ Discharge at Mainstem Flow Depth Mainstem Flow Depth Mainstem Flow Depth Gold Creek Discharge at Mouth Discharge at Mouth Discharge at Mouth ( cfs) ( cfs) (ft) ( cfs) (ft) (cfs) (ft) 1,000 10,000 0.4 31,000 2.9 55,000 5.6 3,000 12' 000 0.6 33,000 3.3 57,000 5.8 5,000 14,000 0.9 35,000 3.5 59,000 6.0 7,000 16,000 L1 37,000 3.8 61,000 6.1 9,000 18,000 1.4 39,000 4.0 63,000 6.3 11 '000 20,000 1.6 41,000 4.2 65,000 6.5 12,000 21' 000 1.7 42,000 4.3 66,000 6.6 13,000 22,000 1.9 43,000 4.4 67,000 6.7 15,000 24,000 2.1 45,000 4.6 69,000 6.8 17' 000 26,000 2.4 47,000 4.9 71 '000 7.0 19,000 28,000 2.6 49,000 5.1 73,000 7.2 21,000 30,000 2.9 51,000 5.2 75,000 7.4 23,000 32,000 3.1 53,000 5.4 77' 000 7.6 25,000 34,000 3.4 55,000 5.6 79' 000 7.8 27,000 36,000 3.6 57,000 5.8 81,000 7.9 29 '000 38,000 3.9 59,000 6.0 83,000 8.0 31,000 40,000 4.1 61,000 6.1 85,000 8.3 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. 5-5 Ml!i, ....... !lll!!f,, - ,.,__ -- ~ .~. ~- -,. 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 Sheet 6 of 16 Table A-5 (con't) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH Condition 1.!/ 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 Flow Depth at Mid-slough (ft) 0 ~I 0 0 0 0 0 0 0 0 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Condition 2.!/ 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 Flow Depth at Mid-slough ( ft) 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.5 0.7 0.9 1.0 Condition J!/ Mai nstem 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 Flow Depth at Mid-slough ( ft) 0.5 0.7 0.9 1.0 1.2 1.4 1.5 1.6 1.7 1.9 2.1 2.3 2.6 2.9 3.2 3.4 3.7 .!/ 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, mid-: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 )ill!!!, Condition 1-y Condition 21/ ~ d"t" 311 L.on 1 10n ~ Flow Depth Flow Depth Flow Depth ~ Sus itna River at at at Discharge at Mainstem Upstream Mainstem Upstream Mainstem Upstream Gold Creek Discharge Berm Discharge Berm Discharoe Berm -, ( cfs) (cfs) (ft) ( cf's) ( ft) (cfs) (ft) 1,000 1o,ooo· 0 31,000 0 55,000 0 Jl>!l,, 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 . ...,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 0 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 -, 1J 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 !"''· r-- (~- """" ,~ !""" I""' ,<'*"' Sheet 8 of 16 ·Table A-5 (con•t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH Condition 11! d. . 211 · Con 1t1on - Susitna River Average Average Discharge at Mainstem Velocity Mainstem Velocity Gold Creek Discharge at Mouth Discharge at Mouth (cfs) (cfs) (ft/sec) (cfs) (ft/sec) 1, 000 10,000 0 31,000 0 3,000 12,000 0 33,000 0 . 5, 000 14,000 0 35,000 0 7,000 16,000 0 37,000 0 9,000 18,000 0 39,000 0 11,000 20,000 0 41,000 0 12,000 21,000 0 42,000 0 13,000 22,000 0 43,000 0 15,000 24,000 0 45,000 0 17,000 26' 000 0 47,000 0 19,000 28,000 0 49,000 0 21,000 30,000 0 51,000 0 23,000 32,000 0 53,000 0 25,000 34,000 0 55,000 0 27,000 36,000 0 57,000 0 29,000 38,000 0 59,000 0 31,000 40,000 0 61,000 0 1/ See last page-of this table for explanation of conditions. 2/ Velocity is less than 0.05 ft/sec. c d · · }I on 1t1on - Average Mainstem Velocity Discharge at Mouth (cfs) _ (ft/sec) 55,000 0 57,000 0 59,000 0 61,000 0 63,000 0 65,000 0 2/ 66,000 o. OZ; 67,000 o.o-=- 69,000 0.1 71' 000 0.2 73,000 0.2 75,000 0.3 n,ooo 0.4 79,000 0.5 81,000 0.6 83,000 0.7 85,000 0.8 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 (con 1 t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RAB IDEUX SLOUGH Condition 11/ Condition 21/ c d. . 311 on 1t1on - Average Average Average Sus itna River Ve 1 oc ity Ve 1 ocity Ve 1 oc 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 0 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 -; """" ...... 1'10!!. """"· .-. """"· ~ ,,.,.,,, ~. ,~""" !"'"' !""' f~ ,...,.. r -I ,... ,~"""' .r- !J- ' Sheet 10 of 16 Table A-5 (con 1 t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH d. . 111 Con 1t1on -· Condition 2.!/ Condition 3.!/ Average Average Average Velocity Velocity Ve 1 oci 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 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 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 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 l/ See last page of this table for explanation of conrlitions. 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. 5-10 .!/ 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 ,~""'<, Sheet 12 of 16 - Table A-5 (con 1 t) I'- MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH ;- Condition 1y d"t• 211 Con 1 1on -c d"t• 311 on 1 1 on - Susitna River Wetted Wetted Wetted Discharge at ~lai nstem Perimeter Mainstem Perimeter Mainstem Perimeter Gold Creek Discharge at Mouth Discharge at Mouth Discharge at Mouth r C cfs) ( cfs) (ft) (cfs) (ft) (cfs) (ft) 1,000 ' 10,000 10 31,000 28 55,000 70 3,000 12,000 10 33,000 32 57,000 70 5,000 14,000 12 35,000 35 59,000 71 7,000 16,000 13 37,000 37 61,000 71 ~· 9,000 18,000 15 39,000 56 63' 000 72 11,000 20,000 16 41,000 61 65' 000 72 12,000 21,000 18 42,000 63 66,000 73 13,000 22,000 18 43,000 66 67,000 73 15,000 24,000 20 45,000 68 69,000 74 17,000 26,000 23 47,000 69 71' 000 74 r 19,000 28' 000 25 49,000 69 73,000 75 21,000 30,000 28 51,000 69 75,000 76 23,000 32,000 30 53' 000 70 77' 000 110 .-25,000 34,000 35 55,000 70 79,000 150 27,000 36.000' 36 57,000 70 81,000 180 29,000 38,000 43 59,000 71 83,000 185 ~-31 '000 40,000 60 61,000 71 85,000 190 1J See last page of this table for explanation of conditions. r'" 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 I I Sheet 13 of 16 ~' Table A-5 (con•t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES -, I . RABIDEUX SLOUGH 1\1101!. Condition 11/ d't" 211 Con 1 1 on -c d. . 311 · on 1t1on - Wetted Wetted Wetted Susitna River Perimeter Perimeter Perimeter Discharge 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 cJj 35,000 12 59,000 24 7,000 16' 000 ~I 37,000 12 61,000 25 9,000 18,000 c# 39' 000 12 63' 000 26 -, 11' 000 20,000 c# 41,000 12 65,000 28 12,000 21,000 ril 42,000 12 66,000 29 13,000 22,000 ri1 43,000 12 67,000 30 ...... 15,000 24,000 cf;_l 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 81,000 300 29' 000 38,000 12 59,000 24 83,000 310 31,000 40,000 12 61 '000 25 85,000 310 """· 1/ 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). )i!r!, 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. 5-13 ~ ,1 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, for narratfve and worksheets explaining method of determining slough physical habitat variables. 5-14 I I Sheet 15 of 16 Table A-5 (con 1 t) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RAB I DEUX SLOUGH Condition 11/ Condition 21/ Condition 31/ Susitna River Water Water Water Discharge at Mainstem Table IVlainstem Table Mainstem Table Gold Creek Discharge Elevation Discharge Elevation Discharge Elevation (cfs) (cfs) ( ft ,ms 1) (cfs) (ft,msl) (cfs) (ft,msl) 1,000 10 '000 31 '000 55' 000 3,000 12,000 33,000 57,000 5,000 14,000 35,000 59,000 7,000 16,000 37,000 61,000 9,000 18 '000 39,000 63,000 11,000 20,000 41,000 65,000 12,000 21,000 42,000 66,000 13,000 22,000 2/ 43,000 2/ 67,000 2/ 15,000 24,000 45' 000 69,000 17' 000 26,000 47,000 71' 000 19' 000 28,000 49,000 73,000 21,000 30,000 51,000 75,000 23,000 32,000 53,000 77' 000 25,000 34,000 55,000 79,000 27,000 36,000 57,000' 81,000 29,000 38,000 59,000 83,000 31,000 40,000 61,000 85,000 y 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. """· !llll!!!i,, ~ 1'1'1'1, ,.,.., -,, "" - See Attachment, Part 4, for narrative and worksheets explaining method of ·~ determining slough physical habitat variables. -· 5-15 ·"""" ~- Table A-5 (can't) MAINSTEM DISCHARGE VS. PHYSICAL HABITAT VARIABLES RABIDEUX SLOUGH Mainstem Discharge = QGC + Oc + Or in which, Sheet 16 of 16 QGC Oc Or = = = 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 Condition QGC Oc Or = = = 1: 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 Oc = average monthly flow in August Or = average monthly flow in August /"""' Condition 3: QGC = 1,000 to 31,000 cfs in 2000 cfs increments Oc = 10% exceeded flow during the month of June · Or = 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 ,~""" ~ ' ! -!""' ~· 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 elevations 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- charge~ 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 mainstem discharges greater than 10,000 cfs, 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 computed slough water surface profiles 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·ime I and Regime IT (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 3 cfs (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 - .. ,., - -i Wetted Surface Area For mainstem discharges greater than 11,000 cfs, wetted surface areas were estimated from aeri a 1 photography. For rna i nstem discharges less 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 widths were estimated from aerial photos and computed s laugh water surface profiles 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 21 A map of Slough 21 is shown on Figure A-4. Methods of analyses are given in the Attachment, Part l. Threshold D~scharges The threshold Susitna River mainstem discharges between Regimes II-A and III (26,000 cfs) and between. Regimes I and II (21,300 cfs) are based on field measurements of slough and mainstem discharge. Slough Discharges Slaugh discharge estimates are based on the same fie 1 d 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. Velocity 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 oe 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 observations of slough discharge 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 aerial 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. Velocity 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 widths (top widths) measured from aerial photography at the upstream berm. Water Table Elevations There is not enough information to estimate water table levels at this slough since wells 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-1 through A-5 .. A. 6. 1 Slough 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 until mainstem flows have reached 26,000 and 30,000-32,000 cfs, respectively (Table A-1). 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 W1 (see Figure A-2). For Regime 1, the depth at the controll- ing berm downstream of cross-section W1 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-slo11gh, 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 ~outh 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 - - .,.,. 'I ' -1] ("""' I r r 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 t~e upstream berm·is overtopped, the increase in slough discharge results in an increase in water surface elevation and depth. Once overtopped, the water surface elevations 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 I. However, in Regime II, as the backwater from the mainstem increases with increasing Susitna River 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 Table A-4. Regime I flow at Slough 21 ihcludes flows up to a mainstem discharge of 21,400 cfs. Regime I I flow occurs over a 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 wheri 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 controlling 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 iri water surface elevation (and depth). The increase at mid-slough is attrioutable to the increase in discharge s i nee 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 Slaugh is affected by the backwater from the Sus itn a River (Regime II) at mainstem flow conditions (at the slol.1gh) 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 higher flows, isola ted 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 1t of backwater from the rna 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 - - .... - 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 upstream 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. At a discharge of 79,000 cfs, the water surface encroaches on the flood plain resulting tn 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, ususitna Hydro Aquatic Studies, Phase I Final Draft Report 11 , Volume 1, 1982. Alaska Department of Fish and Game, 11 Susitna Hydro Aquatic Studies, Phase II Basic Data Report 11 , Volume 4, 1983. Chow, V.T., Open Channel Hydraulics, McGraw-Hill, New York, 1959~ R&M. Consultants, Inc, 11 Susitna Hydroelectric Project,· Hydraulic Project, and Ice Studies 11 , for Alaska Power Authority, Anchorage, Alaska, March 1982. , 11 Susitna Hydroelectric Project, 1982 Hydrographic Sur-----......-----,,.... veys 11 , for Alaska Power Authority, Anchorage, Alaska, December 1982a. 14 --~----:-,.,.- , "Susitna Hydroelectric Project, Slough Hydrology Interim Report11, 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 ~ i -i - -