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I I I I I I I I I I I I I I I I .,. I I I SUSITNA HYDROELECTRIC PRO,JECT Prepared by: TASK 3-HYDROLOGY SUBTASK 3-01 CLOSEOUT REPORT. REVIEW OF AVAILABLE MATERIAL FINAL REPORT MARCH 1982 I I I I I • I l}{]£iru~& 0 ~®&®©@ Susitna Joint Venture Document Number ~.----=- Please RettJrn To DOCUMENT CONTROL r ~- i ! I I I I I I Sus~tn~ J~ktt Vahtute Document Nt.nnbst :JZ_ Please Return To ~~~UM~~u ~@~li~@l SJJSJTNA HYDFtOELE·CTR~C PROJEc·r Ll ~ ~· ... · ..... i '-, ,. . .. . • • w ~~-RYCOP I I I J I l I I I I t I Pr~pared by: ·~ PROPERTY OF: Ala~!:~. Power AuthorJty ~ .. ;··· W. 5th Ave . . Anchor~ge, Alaska 99501 •em ~z. •. . -- S~!ST/~SX 3.01 CLOSECHJT REj:'oR·r REVIEVJ OF .t\VAILABlE MATERIA·~ F~NAL REP0:1T MARCH 190';.: I I I ___ -ALASKA POWEf.:: AUTHORITY---=-··-""' ) . ~. · .. 1 ' J ·j l j ~ ' ·rt ,, .i \ j IJ ' J . ~J d \ j' b l}{]£!ru~& 0 @:00&®©@ Susitna Joint Venture Document Number :9.9 1 Please Return To l DOCUMENTCONTROL !_ Tf --~USITNA HYDROELECTRIC PROJECT I .. f . , .. l 1 l ! J I I I "" j ) I [ ' ('; Prepared by: TASK 3-HYDROLOGY SUBTASK 3 .. C:ra CLOSEOUT REPORT REVU;W OF AVAILABLE MATERIAL . FINJ,le REPOR'l• MARCH 1982 -·~ --'' ·-,~ -~---- HAIAZA.,.EBASCL Susitna Joint Venture Document Number I ( l ·--·------·· --,.~ ··---~~-~"-- ' ' ' I ..J J J "' I I ' '1,' i \ ' 'I' . " ' i ' 1 1' 1 l' ! ' l ·~ .. .J II: ,jJ, '"""" l ' l ' ' - Prepared by: [i] SUSITNA HYDROELECTRIC PROJECT TASK 3-HYDROLOGY SUBTASK 3 .. 01 CLOSEOUT REPORT REVIEW OF AVAILABLE MATERIAL FiNAL REPORT MARCH 1982 RECEIVED MAYo 5 1983 .__ALASKA POWER AUTHORITY _____ -...J I I I I I I I I· •• I I I I I I I I I .i ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT TASK 3 -HYDROLOGY SUBTASK 3.01 -CLOSEOUT REPORT REVIEW OF AVAILABLE MATERIAL TABLE OF CONTENTS Page LIST OF T-ABLES ••o••·······························~· ·••o·········· iii LIST OF FIGURES ····················e····il················: ........ iv 1 -INTRODUCTION ..........•.. c ................................... '*...... 1-1 1.1 -·Background ................................. ., . . . . . . . . . . . . . . . 1-1 1.2-Report Contents ......................................... 1-1 • 2-SUMMAR.Y ···························~···························· 2-1 2ol-Available Data ...................... ., ........................ 2-1 2.2-Previous Studies ......................................... 2-1 2.3-Conclusions ..........................•.................. 2-2 3 -SCOPE OF WORK ......... .-................................ , ........ , . 3-1 4-HYDROLOGIC DATA FOR THE SUSITNA BASIN ........................ 4-1 4.1 ... -Streamflow ....... -.. ...... Q •••• (I ••• 1:1................ .. . . . . . 4-1 4.2-Sediment Discharge .......................•.............. 4-2 4. 3 .. Water Qual i t y .......... -· .............. c • • • • • • • • • • • • • • • • • 4-3 4.4-Ice Cover Data···············~·························· 4-4 4.5 -Discussion .......... ., ................ 0 ...................... 4-4 5-HYDROLOGIC DATA FOR ALTERNATIVE HYDRO SITES .................... 5-l 5 .1 - I nt rod uct i on . . . . . . . . . • . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • 5-1 5 .2 -St,reamfl ow Oat a ••••••••• 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 5-1 6 -CLIMATIC DATA .............................. ,., .. e................ 6-1 6 .. 1 ... Climatic Data ·················a•····················· .. ··· 6-1 6.2-Evaporation Data.···································,···~ 6-1 6.3 .. Snow Surv-~y .............. c.···················••o·•········ 6-1 BIBLIOGRAPHY APPENDIX A -STREAMFLQW GAGING STATIONS IN THE SUSITNA BASIN B -MEMO ON PROBABLE MAXIMUM PRECIPITATION ESTH~ATES FROM NATIONAL WEATHER SERVICE TO CORPS OF ENGINEERS .., UNDATED 1 ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT TASK 3 -HYDROLOGY SUBTASK 3.01 -CLOSEOUT REPORT REVIEW OF AVAILABLE MATERIAL TABLE OF CONTENTS (Cont'd) APPENDIX C -SUSPENDED SEDIMENT GAGING STATIONS D -WATER QUALITY -STATIONS AND PARAMETERS E -MISCELLANEOUS CORRESPONDENCE AND MINUTES OF MEETINGS WITH VARIOUS AGENCIES F -MONTHLY STREAMFLOW D.l\TA FOR ALTERNATIVE H~DRO SITES G -CLIMATE DATA STATIONS H -SNOW SURVEY -STATIONS AND PERIOD OF RECORDS l -DATA COLLECTED BY ALASKA DEPARTMENT OF FISH AND GAME ii I I I I I I I I I I I I I I I I I I I 'I: I I I I I I I I I I I I I I I I I I r:: LIST OF TABLES • Number 4.1 4.2 4.3 4.4 4 .. 5 4 .. 6 4.7 4.8 4.9 4,, 10 4~11 4.12 4 .. 13 4.14 4.15 4.16 5.1 5.2 6.1 6.2 6.3 Title Page Typical USGS Streamflow Records ........................ 4-5 Estimated Monthly Flows at Devil Canyon Dam Site •••••• 4-6 Estimated Monthly Flows at Watana Dam Site ....... .o •••••• 4-7 Estimated Monthly Flows at Vee Canyon Dam Site •••••••• 4-8 Estimated Monthly Flows at Denali DO.r;t Site .............. 4-9 Yearly Peak Flows of Record ............................ 4-10 Upper Susitna River Basin Peak Discharges ............ e. 4-10 Summer Probab i' e ~1aximum Flood ............................ 4-11 Spring Probable Maximum Flood ••••••••••••••••••••••••• 4-11 Typical USGS Suspended Sediment Records ............. ~ •• 4-12 Suspended Sediment Transport at Gaging Stations ••••••• 4-13 Reservoir Sediment Inflow .............................. 4-13 Typical USGS Water Quality Records ....................... 4-14 Ice Observation Data for Susitna River ................. 4-16 PMF Estimates at Dam Sites ····························4-18 Reservoir Sediment Deposit at Dam Sites ~ ............... 4-18 Streamflow Data Base ·····························~····5-3 Transposition of Streamflow Data Base ······~~·········5-4 Typi ca 1 NOAA Climate Data Records ...................... 6-2 Basin Climatological Data .............................. 6-3 Pan Evaporation Data .................................... 6-4 iii I I I I I I I I I I I I •• I I I I I I LIST OF FIGURES Number 2.1 2.2 4.2 4.3 4.4 4.5 4.6 4. 7 . 4.8 4 Q. ,..; 4.10 ~~: ••• ·.,·'. ~ •• ~ ,· -1 ·~~-t: .:·· . _· ·~· .... : Title Page ~ Map Showing Locations of USGS Gaging Stations in A l ask a . . . . . . • • . • . . .. . . . . . . . • . . . . . . . . . . . . . . . e. • • ~-• • • •. • • • • 2 -3 Map Showing Gaging Stations and Dam Sites on the Susitna River ························c···CI······/l· .. ··· 2-4 Selected Alternative Hydroelectric Sites .............. 2-5 Annual Low Flow Frequency-Susitna River at Gold Creek 'I) ........... " •••••••• ., .......................... ~ •••• 4-19 Synthet·i c 32-month Low Flow Frequency -Susi tna River at Gold Creek·······························~··· 4-20 Peak Discharge Frequency -Su si tna River at Go 1 d Creek .................................................... 4-21 Assumed· Sn0w Pack in Water Equivalents for PMF Derivai:ioil -$. •••••••••••••••••••••.•••••••••••••••••••••• 4-22 Summer Probable Maximum Flood Hydrographs-Devil Canyon and \~atana Projects ........................ H •• 4-23 Spring Probable Maximum Flood Hydrographs-Devil Canyon and \~at ana Projects ..... ~ ...................... 4-24 Suspended Sediment Size Analysis ..........•..•..•..... 4-25 Suspended Sediment Rating Curves for SusitJa River ..•. 4-26 Bed Load Rating Curve for Susitna River at Cantwell .. ~.4-27 Total Sediment Rating Curve for Susitna River Basin . Above Gold Creek ................. ~ ........ , ............. 4-28 iv I I I I I I I I I I I I I I I I I I I .. · .• ;:"· ,:_ ·. . . .:-:.: .:-r · .. -·~o~:_!.-. "'If·'· "·. ·. . . :. . . ·: .. : ··.·: .' . . '_ ·. 1 -INTRODUCTION 1.1 -Background The development of hydr-oelectric power in the Susitna River Basin has been under study for the last three decades. Streamflow observations in the basin extend over 30 years at-the oldest estabiished gaging stations. Some climatic records at Talkeetna and Summit stations date back from 1938. Most of the data has been co.ilected by agencies such as the United States Geological Survey (USGS), U.S. Soil Conser'vation Service (SCS), National Oceanic and Atmospheric Administration (NOAA) and the Arctic Environmental Information and Data Center (AEIDC). The Acres American Incorporated Plan of Study (POS) (1) for the reassessment of the feasibility of the Susitna Hydroelectric Project includes Hydrologic Studies under Task 3 which is composed of several subtask~. The objective of the Subtask 3.01 is to assemble and review all available reports, maps and studies relating to the hydrologic aspects of the Susitna 'and neighboring basins and abstract hydrologic design parameters required for the planning studies concerned with· alternative hydro sites including small hydro development in the Railbelt. Studies of ootential hydroelectric develooment in the Susitna and the . -. neighboring basins have chiefly been conducted by the U.S. Corps of Engineers · (COE), U.S. Bureau of l{eclamation (USBR), Kaiser Engineers, Alaska Power Administration and the Federal Energy Regulatory Commission (FERC -formerly Federal Power Commission). vJhile identifying suitable sites for development, these studies have co 11 ected and interpreted hydro 1 ogi cal and c 1 imate data to derive various design parameters. 1.2 -Report Contents The report is briefly summarized in Section 2. The scope of work associated with Subtask 3.01 is described in Section 3. A review of previous hydrologic data collection and processing work undertaken within the Susitna Basin is outlined in Secti·on 4 while Section 5 discusses hydrologic data pertinent to other potential hydroelectric development schemes in the vicinity of the rail- belt. Section 6 deals with the availab-le climatic data. Short extracts from several publications are appended for ready reference of useful data. 1-1 I I I I I I I I I I I I I I I I I I I . ' . . . t' . . . . . . . . . ~ . ~y :. • - 2 -SUMIVIARY 2.1 -Available Data USGS (13,14,15,16) collects streamflow data at over a hunared stations within the State of A 1 ask a (see Figure 2 .1). Temperature, sediment discharge and water quality observations are made at a smaller number of gaging stations. The main objective of the USGS is to obtain sufficient data to evaluatf:, on a regional basis, the water resource potential of the State. Thus, dat~ at specific locations of interest to a hydroelectric or other development are not usually available directly from USGS records. Continuous streamflow records exist for the station at Gold Creek on the Susitna River for over 30 years. Most of the river basins have some flow records extending over similar periods. On the Yukon River at Eagle~ streamflow records date back to 1911. Water quality and sediment discharge records are usually available for much shorter periods. Climate data is collected mainly by NOAA (formerly by the National Weather Service) at various airports. The data includes daily temperatures, relative humidity, precipitation, wind speed and direction, sunshine hours, weather type and sky cover. NOAA operates some 24 local climatolog1ca1 data stations in the State where 3 or 6 hourly observations are made for most of the above parameters. Additional information is available from. AEIOC in the form of processed climatic data. The SCS runs regular snow course surveys in the area and snow depths and water equivalent data are available at a number of stations in and around the Susitna basin. At several stations, the surveys date back to the winter of l9b4 .. In addition, water resources data have been collected and/or analyzed by the Alaska Department of Fish and Game (ADF&G) and Alaska Department of Natur·al Resources (DNR) in conjunction with special studies. 2.2 -Previous Stuaies The most comprehensive analysis of hydrological information for the Susitna River to date is to be found in the COE Feasibility reports (5,6) (1975 and 1979) dealing with hydroelectric development of the Susitna basin. Preliminary hydrologic analyses for Cook Inlet and tributaries, Copper River and Gulf Coast and Yukon and Kuskokwim River Basins were undertaken in 1950/51 by the COE and described in their Harbors and Rivers in Alaska-Survey Reports (4). In 1952 the USBR reported (8) on the potential development of water resources in the Susitna River Basin. This report provides hydrologic information at several identified dam sites (see Figure 2.2). Later results in 1960 by the USBR (9) and the Alaska Power Administration (1974) (10) for the Devil Canyon project on the Susitna River. provid" updated information at that site~ The 1974 report by Kaiser Engine~rs (2) inc·rude hydrologic analyses for the Hic;h Devi 1 Canyon and other dam sites on the Susitna. (1) Numbers 1n brackets refer to the reference number. 2-1 The 1976 Federal Power Commission report (12), the 1979 COE National Hydroelectr·ic Power Resources Study (7) and the 1980 Alaska Power Administration Hydroelectric Alternatives for the Alaska Railbelt report (11) include inventory-level hydrologic calculations for large and small potential hydroelectric developments covering the entire state. Figure 2.3 shows some of the more promising of these developments which are inclu~ed in current Task 6 engineering studies. 2.3 -Conclusions An Indsx (3) of available hydrologic and climatic data has been prepared and should be consulted if more detailed outl.:1ne of available data is r·equired. Extracts from the Index are included i·.1 Appendix A, C, 0, G, ~and H. A detai 1 ed review of the information has generally confirmed the proposed supplementary data collection program and the hydrologic analyses outlined in the February 1980 Acres POS.. On the basis of this i''E::Vi ew it became apparent that some minor modifications to the proposed supplementary data collection program should be made. These are as follows: Because of the potential for extremely deep snow cover in the mountainous regions, the use of snow pillows is not advised as the snow tends to bridge acros~ these relatively 1 arge pressure plates. A more appropriate measure- ment procedure is the use of snow markers supported by conventional measure- ment using snow tubes; -The proposed water quality (both water chemistry and suspended sediment load measurements) should be scheduled to obtain a maximum amount of information during spacific hydrologic events such as flooas and low flow periods rather than on a regular basis as originally proposed; A few basic water quality parameters should be collected using a continuous monitoring device at Watana to study the short-term variations of certain key parameters such as water temperature 9 dissolved oxygen concentration, specific conductance, pH and oxidation-reduction potential. This would facilitate a better un~~rstanding of the processes involved and assist with interpretation of historical. data. 2-2 I I I I I I I I I I I I I I I I I I I I I I I I I I I I· I I I I I I I I 65' no· l '60' . ·. . ." ·r . . . . . . . . . : J . . •. ' . . . .· . . .. . . ·,;,' .., . : : .. . . . . -. . -~ ""'""' ·. / . --~ . . ' . . ..... . ~ ·"' .· . 1 o· nc· t so.· AltCTIC l!lf 2-3 •• • f ' . .. , . . ' "{, .:t ~. ;;. f . ~ .. fiJJll GULF 0 F ALASXA 150' .; " • • .:_-. g • • • • ""; • . ' '·. . .. . . .... ;..\ s .. -,.")1-" 10 • lS>t 0 100 11 "'"""='=3:=:i:====~tll: lllHf uu -E+3 I ~ l p l A H A T I 0 H GJf!Ol ;UIIal! hrtial re tct4 cas1·$l.aht1G iovndarr 3f h . . . Jd!OiliJiC Slllll~JIOU lNSE! il -A~CkQR~CE APEl FIGURE 2.1 Hap Showing Loc t' Gaging Stations a"i 10Anls of USGS . n . as.ka (Source: Ref. 14bo· \ . J -.. -- I N I ..f:::. CHULITNA 'q 2924 r;._J N 1 T SCALE: 0 10 MILES --... , ------ zo ----- DAMS~~£ NAME a LOCATION OF US~ GAGlNG STAl'lQi~ FIGURE 2 .. 2 --------------------- 154° 152° 150° 148° 146° 0 rt' '1 t..·~ ~catP '( _,.. .. (/"'V ~~ I J "::,. .. ,J ~ 83 X::• /.J,. 2-) ·;-'1 ' 4~·· 56 . &.. . &·a ~I 26 -I 1 .._, 1 I -c t I fO. j Llo. 1 v rr 0 ALASKA --".........._ 8 0 :CU> Q .. 25 MW -<rn or ;om 1. Strandl i ne L. 13. Whiskers on 2. Lower Beluga 14. Coal rrl-f rrn 3. Lower Lake Cr. 15. Chulitna (TJO ,, 4. Allison Cr. 16. Ohio () -f)> 5. Crescent Lake 2 17. Lower Chulitna :2Ci 6. Grant Lake 18. Cache om 7. "~cCl ure Bay 19. Greenstone :::0 8. Upper Nellie Juan 20. Talkeetna 2 (J)Z =~~ 9, Power Creek 21, Gran i te Gorge 10. Si 1 ver lake 22. K(~etna m-U>< 11. Solomon Gulch 23. Sheep Creek f11 12. Tus~umena 24. Skwentna 2~. Ta 1 ach ul i tna 44-- -<1 OF ALA.SKA \ ·REGION 25 ... 100 M\4 26. Snow 2 7. Kenai Lower 28. Gers tl e 29. Tanana R. 30. Bruskasna 31. Kan ti shna R. 32. Upper Be 1 uga 33. Coffee 34. Gul kana R. "-5 .; . Klutina 36. Bradley Lake 37. Hick's Site 3fL LOWf? 0 39. 40. 41. 42. 43. 44. 45. 46. 4· 7. 48. 49. .-4 -~~ 142 ° \ KEY PLAN 50 >100 MW Lane Tokichitna Yentna Cathedra 1 Bluffs Johnson Browne Junction Is. Vachon Is. Tazilna Kenai Lake Cha ka channa --*" 'r •• l 100 . • l . I l ( I .1 I I I I I I I I I I I I I I I I I I I 3 -SCOPE OF WORK The reports contained in the Bibliography were reviewed and a11 useful summary data abstracted and incorporated in this report. Detailed discussions were held with the staff of the USGS, Alaska regiona1 office, AEIDC, DNR, ADF&G and the SCS. The objective of these discussions wcs to determine what data was available and to firm up the proposed supplementary data collection program proposed for 1980-82. ·Selected minutes of meetings. held with these agencies are presented in Appendix E. · 3-1 I I I I I I I I I I I I I I I, I I ,I I 4 -HYDROLOGIC DATA FOR THE SUSITNA BASIN 4.1 -Streamflow (a) USGS Records The USGS monitors river stages at over a hundred gaging stations in the State. There are six stations curr·ently being operated in the Susitna. Basin, three on the main stem and three on the tributaries. The gagi n·g station on the Susitna at Gold Creek (see Figure 2.2) has a contint..~ous streamflow record for 31 years from 1949 with some minor gaps. The Susitna station near the river mouth has only si.x years of record. Record lengths at other stations vary between these two extremes. Over ten years of record are available at two stations, Susitna Riv~r at Cantwell and Chulitna River near Talkeetna, but observations were discontinued after 1972. Partial and short discharge records are also available for several small tributaries of the Susitna. A list of the gaging stations and record lengths is shown in Appendix A. The USGS field measurements involve continuous river stage monitoring. Using established stage-discharge relationships, mean daily and instantane- ous peak and low flows are calculated. The data is usually presented in the form shown in Table 4.1. In the periods between October and May, ice cover on the river makes accurate stage observations i mpossi b 1 e. The dai 1 y mean flows pub 1 i shed by the USGS are, therefore, estimated by interpolating daily flows from a few manually observed values. However, as the average flow of Susitna in these months accounts only for some 20 percent of the mean annual flow, the effect of any inaccuracy on the total measured supply is small. (b) Previous Analyses of Data The USSR study of 1952 was based on only 2 years {1949-51) of streamflow records on the Susitna at Gold Creek. All the estimates of runoff were derived from this record which was extended back to 1922 by correlation with precipitation records at Tall~eetna. Due to the shortness of records, the USSR estimates of mean annual flows are not as reliable as the more recent estimates. At the Watana dam site, for example~ the USBR estimate of mean annual runoff was 7550 ft3Js compared to the 1975 COE estimate of 8150 ft3/s which was based on some 25 years of record at Gold Creek. The flood studies in the USBR report were based on recorded p~ak discharges of a 11 interior A 1 ask a streams. The periods of record on a 11 the streams, except one, were 5 years or less. The COE analyses were based on 10 or more years of record at gaging stations in the Susitna Basin. Water resource ana lyses for the De.vi 1 Car. yon Project by the USBR were based on a ten year (1950-59) streamflow recoT"d at Gold Creek. Records of Susitna runoff near Denali were extended to cover this period by corl .. elation with Gold Creek runoff. Runoff at the dam sites was estimated by proportioning based on intervening drainage areas. Estimates of peak flood inflows at Devil Canyon and Denali dam sites were made .. However, the rati ona 1 e used in the derivation is not described in the reports. 4-1 The COE report on the Upper Susitna ~asin presents the most comprehensive analysis to date on the hydrology of the river. These studies are based on a 25 year tecord {up to 1974) of streamflow at Gold Creek and shorter lengths of record at Denli (16 years) and Cantwell (12 years) stations on the Susitna, and on the Maclaren River near Paxson (15 years). Monthly streamfl ows at the 1 atter stations were extended by 1 i near corre 1 at ions with the Gold Creek station records. Interpolation of observed and estimated monthly streamflow for the dam sites was accomp 1 i shed by adopting linear drainage area relationships between stations and dam sites. Tables 4.2 to 4.5 show estimated monthly flows for the period 1950-74 for the dam sites at Devil Canyon, Watana, Vee and Denali, respectively. Power studies were carried out utilizing 25 years of recorded streamflo\'1 (observed or extended). The driest and the second driest years of records occurred consecutively in 1969 and 1970. To assess the severity of the driest sequencea i.e. a 32-month period from Octdber 1968 to May 1971~ the COE ·generated monthly streamflows for 400 years based an 25 years of record at Gold Creek using stochastic techniques. The results showed that the observed driest sequence has a return period well in excess of 400 years (see Figures 4.1 and 4.2). The COE carried out frequency analyses of observed peak flows and flooa volumes at 1(:jold Creek, Denali, Cantwell and Paxson gaging stations. To derive the Probable Maximum Flood (PMF) the CUE used the Streamflow Synthesis and Reservoir Regulation (SSARR) computer model developed by the North Pacific Division of the CUE, Portland, Oregon. The model was cali- brated using observed precipitation, temprV"atures anct discharges in the basin for four flood events in the period May through August. It was verified by comparing computed and observed hydrographs for the gaging s~ations at Gold Creek, Cantwell, Denali and Paxson. Spring and summer-- probable maximum floods were estimated for the Watana and Devi 1 Canyon dam sites using this model in conjunction with Probable Maximum Precipitation (PNP) estimates obtained from National Weather Service (see Appendix B). Results of tne frequency analyses and PMF estimates along with relevant data are shown in Tables 4.6 to 4.9 and Figures 4.3 to 4.6. 4.2 -Sediment Discharge (a) USGS Records Periodic suspended sediment samples have been collected by the USGS a't the four gaging stations above Gold Creek for varying periods between 1952 and 1979. A list of stations and the periods of record available are shown in Appendix C. Results are published in their water year ~oof<s and other water supply papers. Typical data collected is shown in Table 4.1u. 4-2 I I I I I I I I ·~ I I I I I I I I I. I I I I I I I I I ,, I I I I I I I I I I The data coverage during high-flow high-sediment events is poor and conse- quently any estimate of total annual sediment yield has a high degree of uncertainty. The majority of the samples collected are analyzed for size distribution. Curves showing typical size distribution of suspended sediment are shown in Figure 4.7. Except for three bed material samples collected by USGS at Denali in September 1958~ no hed samples have been taken at any station. (b) Previous Analyses of Data Analyses in the USBR reports were based on the periodic USGS sampling at Gold Creek, Denali and other interior Alaska streams. The mean annual sediment inflow at Devi 1 Canyon was estimated at 6440 acre ft. without any upstream deve 1 opment as compared to the 197 5 COE estimate of 5040 acre ft. which was based on longer USGS records (1952-74)~ Corresponding figures for Denali r·eservoir are 11,400 and 58UO acre ft., respectively. These figures are based on an assumed depositea weight of 80 lb/ft3 and include an allowance for bed load. As in the case of streamflow, the most comprehensive analysis of sedimentation in reservoirs is that undertaken by the COE in 1975. Suspended sediment rating curves were developed by regression analyses and sediment transport was calculated using the flow-duration and sediment rating curves (see Figure 4,.8),. Table 4.11 shows estimated suspended load at the gaging stations. For the sediment samples collected at Denali gage, USGS have computed total sediment load for ten of these observations by use of modified Einstein procedure. The bed load analysis was based on the three bed 1oad measurements taken at Denali. The COE developed a bed load rating cw"'ve (Figure 4.9) based on these USGS estimates. Using a flow-duration curve, the COE estimated bed load transport at Denali at about 30 percent of the suspended sediment load at the station. Lack of data at other stations precluded estimates of bed load at these stations. Basea on field reconnaissance of bed material it was assumed (by COE) that at Maclaren the bed 1 oad \vou l d a 1 so approximate 30 percent of suspended load as at Denali while at Vee, Watana and Devil Canyon it would be of the order of 10 percent of the suspended load. A basin-wide sediment rating curve (Figure 4.10) was developed using glacial area to basin area ratio and average catchment elevatiofl as independent variables and was used to estimate sediment inflO\'JS at the dam sites (see Table 4.12:.}. 4.3 -Water Quality (a) USGS Records c The locations at which water quality aata have been collected within the Susitna Basin and the information available are listed in Appendix D. Since measurements are taken periodically, the number of measurements, timing and specific parameters measured vary from year to year at any given station. A list of the water 'quality parameters that have been measured in the basin is also presented in Appendix D~ Typical information available from the USGS records are shown in Table 4.13. 4-3 (b) Previous Analyses of Data The USBR reports contain little information on the water quality studies for the reservoirs. A somewhat detailed description of the problems of water quality peculiar to the Susitna basin and effects of reservoir developments on the water quality in the downstream reaches are pt,esented in the COE report of 1975. The report concludes that additional information is necessary for evaluating project effects on water quality and suggests a data collection and analysis program . . 4.4 -Ice Cover Data Information on river ice observation is collected by various agencies at several locations in the basin. A summary of the available information are presented in Table 4.14. 4.5 -Discussion The USBR studies are based on shorter, 1 ess extensive data on streamflow and sediment transport. The 1975 COE report contains the most comprehensive analyses of all hydrological data for the basin. Ther~efore, much of the infor- mation available in the COE report was used as input to Acres preliminary project definition studies carried out during 1980. The COE estimates for the Probab 1 e Maxi mum. Floods of Watana and De vi 1 Canyon have been i nterpo 1 a ted for use at other dam sites (see Table 4~15). Estimates for sediment transports and reservoir deposition have similarly been processed and the results are presented in Table 4.16. 4-4 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I TABLE 4.1 J.LP.i cal USGS Streamflow Records _lReproduced from Refe_rence 14) SOUTH-CENTRAL ALASKA l5t92000 SUSITNA RIVER AT GOLD CREEK LOCATION.--Lat 62°46'04", long 149°41'28"~ in NWs sec.20, T.3l N., R.2 W., Matanuska·Susitna Borough, Hydrologi..:: Unit 19050002. near 1e£t bank under Alaska Railroad bridge, O.l mi (0.2 kml down5tream from Gold Creek 7 0.9 ~i (1..4 km} north of GGld Creek railroad station, and 2.0 mi (3. 2 km) downstream from Indian River. DRAINAG~ AREA.--6,160 mi 2 (15,950 km 2 ). approximately. WATER-DISCHARGE. RECORDS PERIOD OF RECORD.--August: 1949 to current year. GAGE.·•Water-stage reccrder. Datum of gage is 676.50 ft (206.197 m) sbGve mean sea level. Prior to Jun~ 6. lSS7 6 nonrecording gage a: same site and datu111. June 7, 1957 to June 2, 1964, water-stage recorder at site 0.3 l;li (O.S x111l upstream at same datum. REMARKS.-·Nater·discharge recozds good except those for Oct.26 to May 16, which are poor. AVERAGB DISCHARGB.--28 years, 9.667 ft 3 /s (213.8 m1 /s), 21.3Z in/yr· (542 Jm/yr), 7,004"000 acre-ft/yr (8.64-m;~/yr) ~ aTREMES FOR 1'~RIOD OF RECORD.·-Maximum discharge, 90,700 ft:3 /s (2,570"m3 /s) June 7, 1964, gage height, 16.5& £..: (5.054 m}; :uximum gage height observed, 24.48 £1: (7 .462 m) Hay 10. 1954, ice jam; 11inimum daily discharge. about 600 £t 3 /s (11.0 m3 /s} Peb. 16-ZO~ 1950. EXTREMES FOR CURRENT YEAR.--Maximum discharge, 54,300 ft 3 /s (1,540 m3 /s) June 15, g~ge height, 13.94 ft (4.%49 ~), minimum daily discharge, about l,Soo·ft3 fs (42 1lt1 /s) Mar., 1-31. DISCHARGE. 1H CUSIC FEET PER SECOND. '*ATER YEAR OCTOBER 1976 ~EAN \IALUES TO SEPTEMBER 1977 OAT OCT NOV DEC J.At~ FEB MAR APR MAY .JUN .JUi.. AUG SEP 1 54 CO 3QOO 3000 2000 1700 1500 1600 1900 30900 30000 24-200 1~40 2 4980 300\:1 2900 2000 1700 1500 1600 1900 36700 26000 26200 107()0 3 ~750 2800 zeoo 2000 1700 15no 1600 2000 39000 220UO 2340(1 10700 It 4520 2800 2800 1900 1700 1500 l60ti 2000 39700 20000 2!.500 1.0500 5 ~750 280C zaoo 1900 1700 1500 1600 226~ 33100 • 18000, 21700 9840 6 4700 2800 2800 1900 1600 1500 1600 2201) J3200 18000 23400 ~ 7 4720 2800 2600 1900 1600 1500 1600 2500 31300 18000 231t00 98aO 8 4520 2800 2600 1900 1600 1500 1600 3000 31500 19000 21200 11~0 9 4100 2600 2600 1900 1600 lSOO 1600 :JSOO 31900 .20000 19300 l2SOO 10 3880 2600 2600 1900 1600 1500 1600 4000 34400 22000 19900 10800 11 3940 2600 2600 1900 1600 1500 1600 4000 38500 24000 20400 1.4000 12 3800 2600 2400 1900 1600 1500 1600 500!) 44200 26000 21200 "l670U 13 3740 2600 2400 1900 1600 1500 1600 6000 .514PI'I 28000 18900 16980 14 3720 2600 2400 1800 1600 1500 1600 8000 52600 30000 18000 16~0\l 15 3610 2600 2400 1800 1600 1500 1600 10000 5(!600 30000 20100 15000 16 37.60 260~ 2400 1800 1600 1500 1700 12000 50400 29000 20600 15660 17 3720 2400 2400 1800 1600 1500 1100 13600 44800 21000 19200 14500 18 3880 2400 1!400 1800 1600 1500 1700 15300 '42400 25000 . 18600 14400 19 3870 2400 2200 1800 1600 1500 1700 22700 41000 23000 18500 13000 20 3720 2400 2200 1800 1600 1500 1700 261t(IQ 37000 22400 lBSOa 12200 . 21 3760 2400 2200 180;) 1600 1500 1700 21600 34400 22200 19100 l,.~QO 22 3760 2400 2200 1800 1600 1500 1700 17900 33000 21800 20100 14600 23 3560 2400 2200 1800 1600 1500 1700 16600 33000 23000 21600 14eoo 24 3390 2400 2200 18011 ~.£,00 1500 1800 16900 33!100 22800 21500 13000 25 3250 2400 2200 1700 ~600 1500 1800 16800 34000 21300 18800 UltOO 26 3200 2600 2206 1700 1600 1500 1800 18200 34000 20500 16000 10400 27 3200 2800 2000 1700 1600 1500 HlOO 21.800 35000 19500 14400 9840 28 3000 2900 2000 1700 1600 1500 1800 23800 35000 19700 13400 11000 29 3000 3000 2000 1700 1500 1200 zst.oo 34000 19900 12200 llBOO 30 3000 3000 2GOO 1700 . 1500 1900 33100 32000 19600 uooo 12500 31 3~00 2000 1700 1500 29700 21200 10000 TOTA\.. 120100 79500 74500 56700 45300 46500 50400 393000 1139000 708900 596300 379060 MEAN 3974 2650 2403 182.9 lola lsoo 1680 12680 37970 22670 19240. 12640 MAX 540) JQOO 3000 2000 1700 tsoo 1900 33100 52600 30000 26200 16900 MIN 3000 2400 2000 1700 1600 lSOG 1600 1900 30900 18000 10000 9520 Cf"SH .63 .43 .39 .JO .26 .24 .27 2 .. 06 6.16 3 .. 71 3.12 2.os IN. .73 .48 ~45 .3~ .27 .28 .30 2.37 6.ae 4.28 lo60 2 .. a9 AC•FT 238200 157100 147900 112SOl> 89850 92230 99970 779500 2259000 1406000 1183000 751900 CAt. YR 1976 TOTAL 2930760 HEAN 8008 MAX 33300 MIN 900 CF'SM 1.30 IN 17.70 JC-FT 5813000 WTR YA l977 TOTAL 3689280 MEAN 10HO MAX 52600 MIN 1500 CFSM 1.64 IN 22.28 AC•FT 7318000 Note.-·No gage-height record .Feb .• 1l to May 16. ~ ~ TABLE 4.2: ESTIMATE OF MONTHLY FLOWS AT DEVIL CANYON DAM SITE (ft 3/s) (Source: Re.f. S, 6) Drainage Area -5810 Square Miles ., Year Oct .. Nov. Dec. Jan. feb. Mar. Apr. May June July Aug. Sept. 1950 5998 2444 1360 970 744 685 822 10903 18837 21839 19151 7878 7~~ 1951 3642 1229 1039 906 774 699 1529 "13349 19961 21754 18950 20170 85~1 1952 5270 2596 1796 1512 945 831 869 5131 30886 25399 20144 13747 9694 1953 7761 3309 1607 1039 774 774 1527 18259 26123 19583 19848 14498 9~'S2 1954 5336 1987 '1418 1229 945 737 1167 16372 24170 19733 25088 12266 9Ztl4 1955 5080 2612 1934 1698 1323 1039 1134 8827 28519 26498 24754 13567 9?14'9 1956 4683 1796 1229 926 916 888 897 16732 31800 29813 23590 17405 1089U 1957 5493 2836 2026 1607 1418 1134 .1134 13026 29117 22644 19955 18804 9~$1 1958 7743 3728 3062 1846 1227 1077 1442 12121 24678 22099 21595 7195 89~ 1959 4549 2027 1421 '1357 1223 915 1167 15049 22492 24022 29764 16003 9~9'9 1960 6220 2709 2089 1749 1374 1133 '1226 14965 14949 22184 22674 19525 92.~$ ~ 196"1 7386 2842 2543 2307 1652 1705 2498 16425 28004 23638 21260 12695 102~ <n 1962 5602 2563 1986 1789 1413 1319 1603 11896 41050 24972 22757 15101 11~ 1963 6341 2646 1884 1507 1413 944 786 18061 24855 33033 22937 11812 105>'~S 1964 6(}75 21'17 1404 985 908 670 702 4093 48120 22054 15896 9140 9}~} 1965 5964 2657 1146 908 814 851 1288 12313 24385 26572 20201 18619 9~} 1966 6780 1976 1536 1318 1224 1224 1673 9095 31309 19216 20885 11211 a9e;2 1967 3938 1514 1418 1418 1323 1134 1103 14672 28217 25801 30336 16013 10Su4 1968 4635 2226 1943 1873 1797 1797 1806 15275 30103 25628 16800 8394 9}':>:5 1969 3609 1544 832 683 682 769 1422 10451 15163 15819 8596 4922 .)$i]4 1970 2978 1166 829 784 729 735 1027 10782 17788 21825 19171 8666 12.07 1971 4965 3204 2153 1355 973 092 1016 3550 31409 23239 30643 13731 ~1&1 197.2 5521 2916 2365 2109 1910 1717 1611 20979 33158 22449 18997 11990 104&'7 1973 4544 2122 1379 1129 1128 941 966 7882 26834 18008 19814 8790 71S5 1974 3552 1456 992 839 745 693 944 15258 17143 18327 15899 13231 74~1 AVG. 5347 2331 1656 1354 1135 1012 1254 12619 26763 23046 21189 13015 92!::1 f) ____ .. ______ '_ ------ -----a --.. -- - - - - - - - - - Year Oct~ Nov. Dec .. 1950 5067 2083 1174 1951 3089 1064 904 1952 4457 2211 1540 1953 6548 2810 1381 1954 4512 1700 1223 1955 4297 2225 1656 1956 3964 1541 1064 1957 4644 2455 1733 1958 6538 3164 2608 19~9 3851 1735 1227 1960 5251 2303 1784 ,J::::o 1961 6230 2417 2168 I 'i 1962 4726 2275 1765 1963 5581 2478 1701 1964 5235 1809 1205 1965 4896 2376 1061 1966 5398 1608 1239 1967 3328 1237 1155 1968 4050 1948 1713 1969 3155 1363 751 1970 2472 1034 72'1 "1971 1750 2572 "1736 1972 4969 2589 1990 1973 3852 1815 1191 1974 3010 1251 861 AVG. 4435 2003 1422 TABLE 4. 3: ESTIMATE OF HONTHLV FLOWS AT WATANA DAM SITE ( rt 3 /s). (Sauce: Ref. 5~ 6) Drainage Area -5180 Square Miles Jan. feb. ~iar. Aor. ~1ay June Jul)• ' 847 657 607 722 9600 16527 19133 793 682 619 1315 11757 17519 19057 1301 825 730 761 4511 27164 22280 904 682 682 1314 16085 22959 17138 1064 825 651 1012 14422 21234 17271 1457 1205 904 984 7770 25074 23251 809 801 777 785 15947 30237 28301 1381 127~ .• 984 984 11472 25520 19808 ·---1585 1064 938 1244 10700 21662 19363 1174 1062 803 1015 "13282 19716 21081 1499 1165 983 1063 13178 13107 19441 1972 1420 1465 2131 14475 21.J653 20736 1605 1257 1176 1451 11181 36248 23432 1316 120•J 875 761 15526 21137 29169 856 787 579 613 3607 43031 20162 852 801 797 1216 10995 21384 23470 1085 1007 1007 1372 7319 26477 16569 1140 '1065 917 880 12703 24974 22436 1631 1572 1572 1586 13009 26103 22554 617 608 686 1262 9327 14094 14948 653 615 632 974 9574 14816 18835 1120 796 733 832 2933 27848 21312 1716 1537 1402 1334 16722 28194 20276 981 980 823 844 6915 23520 15679 733 655 612 823 13459 15046 16012 1164 980 878 1091 11059 23530 20469 Auq. Sept. 16791 6929 66~~ 16614 17759 75:S.B 1766lf 12100 79.$}2 17403 12762 B:l~ 22015 10795 8060 21721 11941 B5f#n 22370 16576 10ZS4 17453 16555 86.!54 18966 6319 78~ 26174 14104 87~'9 19896 17179 BQ?T1 18662 11173 8~!?'9 20208 12954 98~ 21146 10822 9:3!.1.B 14241 7711 83~.U 17650 16465 8497 17790 . 9442 75Z.i£J 26101 13850 91:4.9 24589 7268 89Gb 7842 4339 49'SS 16586 7363 6"f:9fn 27650 12248 846.~ 17723 11022 91!2:3 17304 7687 6~ 13867 11590 6493 19137 11478 81:~:7 Year Oct. Nov. Dec. 1950 3529 1489 867 i95•i 2177 791 682 1952 3114 1576 1117 1953 4545 1986 1009 1954 3151 1226 900 1955 3004 1585 1196 1956 2777 1117 791 1957 3242 1743 1249 1958 4550 2234 1859 1959 2700 1253 907 1960 3651 1634 1281 ~ 1~61 4323 1716 1549 1 co 1962 3281 1800 1400 1963 4326 2200 1400 1964 3848 1300 877 1965 3134 1911 921 1966 3116 1000 750 1967 2322 780 720 1968 3084 1490 1332 1969 2406 1063 618 1970 1638 815 54} 1971 2155 1530 1048 •J972 4058 2050 1371 1973 2709 1309 881 1974 2114 912 646 AVG. 3158 1460 1037 TABLE 4.4: ESTit1ATE OF MONTHLY flOWS AT VEE CANYON DAM SITE (ft3/s) (Sauce: Ref. S, 6) Drainage .Area -4140 Square Miles Jan. ,... . .. Apr. May June ... ' reo. Mar. .JUly 643 513 479 557 7449 12713 14665 606 530 487 963 9128 13487 14606 954 628 563 584 3487 21021 17130 682 530 530 962 12498 17736 13103 791 626 508 756 11203 16388 13207 1060 1009 682 737 6024 19388 17892 617 612 595 601 11451 21652 20188 1009 900 737 737 8907 19583 15127 1153 795 708 918 8354 16682 14847 871 795 617 764 10364 15133 16226 1087 874 735 791 10227 10065 14912 1418 1038 1068 1525 11256 19121 15946 1300 1000 940 1200 10000 28320 20890 1000 850 760 720 11340 15000 22790 644 586 429 465 2806 34630 17040 760 780 709 1097 88'18 16430 18350 700 650 650 875 4387 18500 12200 680 640 560 513 9452 19620 16880 1232 1200 1200 1223 9266 19500 17400 SOB 485 548 998 7471 12330 13510 437 426 463 887 7580 9909 13900 731 503 470 529 1915 21970 18130 1068 922 881 876 9694 20000 166-90 737 737 628 643 5319 18048 11834 559 507 478 624 10488 11585 ,. 12190 850 726 6'.17 822 8355 17952 15989 Aug. Sept. 12895 5362 5l197 12758 13780 5.&53 13572 9382 6.C194 13369 9896 6.l#D4 16941 8367 6tli72 16714 9256 6..'!..:46 15920 11887 1:SS1 13324 12843 6&U7 14626 4873 5~7 20247 10969 &7/'37 15309 13305 6t:6b 14339 8660 68!~0 16000 9410 79Ji:.2 18190 9187 7$~4 11510 5352 66.24 13440 12910 ~5 12680 6523 5-·1!:b9 19190 10280 68m3 10940 5410 6>t1~3 6597 3376 4.1159 12320 5211 45n1 22710 9800 6~1 15620 9423 6$88 13161 5865 Yn>a 10513 8880 4,~~ 14515 8808 6:.11'94· -~--~~------~------ -~~----~~--------- lABLE 4.5: ESTIMATE OF MONTHLY FL0\'15 AT DENALI DAM SITE (ft 3/s) (Sauce: Ref. 5 7 6) Drainage Area -1260 Square Miles Aii~l Year Oct. Nov. Dec. Jan. feb. Mar. Apr. May June July Aug. Sept. Aver9 1950 1651 635 333 226 165 149 186 2903 7470 10,~l06 8217 2029 28~ 1951 976 296 245 209 173 153 380 3573 7686 10396 8145 5442 lt~ 1952 1443 679 454 375 219 188 198 1331 9798 10880 8570 3675 :n:;;l 1953 2163 881 401 245 173 173 379 4926 8877 10106 8467 3881 3lS'9 1954 1462 507 348 296 219 163 279 4406 8500 10127 10294 3269 JR:~ 1955 1388 683 492 426 401 245 271 2335 9340 11027 10180 3625 Jj~ 1956 1274 454 296 214 212 204 206 4505 9975 11469 9778 4680 36.l'\6 1957 1508. 760 518 401 348 271 271 3485 13844 12442 10891 '5098 415} 1958 1846 877 506 345 230 188 306 1870 9769 10399 7766 2295 30$~5 1959 1267 529 264 209 161 98 119 2657 10164 9697 9581 3423 31S~ +::-1960 2029 949 718 562 411 347 344 4212 6087 10293 9197 5937 34~ I 1961 2321 860 661 492 382 396 590 3906 8018 9419 8459 5233 3}9'5 1..0 1962 1700 820 549 373 318 292 358 2600 11411 10991 10628 L!656 372.5 1963 1452 603 403 343 331 237 227 4448 8473 12305 11062 4436 3693 1964 1329 438 281 203 199 154 174 1143 14109 8496 7318 3289 3ll94 1965 1959 840 324 251 212 238 361 3113 6091 8231 6958 7956 Jfl~~ '1966 1556 471 377 319 301 301 420 2447 9096 9481 7852 4013 '30~5 1967 1064 402 376 382 354 298 294 4026 9204 11012 12695 4400 37~9 1968 1208 1261 474 464 441 441 441 4308 9802 13230 10793 2721 31S'9 1969 765 452 213 179 177 187 309 2324 8639 9848 4274 2480 24S7 1970 1233 563 389 325 274 242 349 2801 6369 9816 7407 2554 26:·~3 1971 1015 687 469 281 208 195 221 913 9803 11315 11830 4009 341!2. 1972 1317 640 557 521 419 lt32 l100 5364 8805 11395 9234 3241 3)152 1973 996 470 302 250 236 211 213 1495 7257 9343 J 8376 2944 2Su4 1974 1128 557 426 359 313 273 319 3426 6620 '10570 10179 6202 ll6~ AVG. 1442 653 415 330 277 243 305 3141 9008 10508 9126 4060 3292 ·, (1 TABLE 4.6: YEARLY PEAK FLOWS OF RECORD (Source: Ref. 5' 6) Gold Creek Cantwell Denali Maclaren Peak Peak Peak Peak 3 3 J 3 Date ft /s Date ft /s Date ft /s Date ft /s ---~- 8/25/59 62,300 6/23/61 30,500 8/18/63 17,000 9/13/60 8,900 6/15/62 80,600 6/15/62 47,000 6/07/64 16,000 6/14/62 6,650 6/07/6b, 90,700 6/07/64 50,500 9/09/65 15,800 7/18/65 7,350 6/06/66 63,600 8/11/70 20,500 8/14/67 28,200 8/14/67 7,600 B/15/67 80,200 8/10/71 60,000 7/27/68 19,000 8/10/71 9,300 8/10/71 87,400 6/22/72 45,000 8/08/71 38,200 6/17/72 7' 100 TABLE 4.7: UPPER SUSITNA RIVER BASIN PEAK DISCHARGES,(ft3/s) (Source: Ref. 5, 6) Recurrence Interval Susitna at Susitna near Susitna near Maclaren near (vears) Gold Creek Cantwell Denali Paxson 5 67,000 42,000 19,500 7,300 10 78,000 48,500 13,200 8,200 25 90,000 56,000 27,500 9,200 50 101,000 63,000 32,<JOO 10,100 100 111;000 69,000 37,uDO 11,000 4-10 I I I I I I I I I I I I I I I I I I I I I I I I I I I· I I I I I I I I I II cl TABLE 4o8: SUMMER PROBABLE MAXIMUM FLOOD Project Watana Devil Canyon with Watana (Source: Ref. 5L 6) Maxi~m Inflm~ ft /s 213,000 223,000 Maxi~m Outflow ft /s 186,000 218,000 TABLE 4.9: SPRING PROBABLE MAXIMUM FLOOD Project Watana Devil Canyon with Watana (Source: Ref. 5, 6) Naxim~m Inflow ft /s 223,000 226,000 4-11 Maxi!Tllm Outflow rt>/s 192,000 222,000 ... ·~ ~ • .!.: ' • ' . . ' ~ .. . .. . . . : . . : . . . 1 ·-~ • • . • . "'· ' . .. ~ ... .. . 1 • -•• -. ~ .. . : . . . .. . . . -: ~ • • A.~ . . . .. . . . -. ' .. . . . "~ . ;. , .... TABLE 4.10 ..;..TY~P~-.1_· c.;_a;.;..l_..U_S_G_S _s_u.;..os..._p_.e_n_d_ed __ . __ s;..,;e--d_.i_m..;.,en_t_R_;e""""'c_o. rds {Source: Ref. 14) SOUTH-CENTRAL ALASKA 15291000 SUSITNA RIVER NEAR DENALI--Continued WATER-QUALITY RECORDS PERIOD OF RECORD.·-Iiater yea.rs: 1957·66, 1968-69. 1974 to current year. PERIOD OF DAILY RECORD.·- WATER TEMPERATURES: Augu.st 1974 to current year (seasonal). INSTRUMENTATION.--Temp~ratJ.lre recorder since Aug. 29, 1974. REMARKS.··No record Dec .• '!i to Hay .31 when temperature sensor froze in ice • .EXTREMES FOR PERIOD Or DAILY RECORD.·- IiATER TEMPERATURES: Ms,ximum, ll.O'C June 11, .1977; minimum, o.o•c on most days during winter periods. EXTREMES FOR CURRENT YEAR.-- WATER TE:,!PERATURES: Maximum, lt.o•c June 11; ~inimum, O.o•c on most days during winter period. WA"CER QUALITY uATA• "lATER YEAR OCTOSER 1976 TO SEPTEH6ER 1977 sus. SED~ FALL sus. SED. FALL sus. SED. FALL DATE .JON TIME INSTAN- TANEOUS DIS- CHARGE (CfSJ TEMPER- ATURE lDEG C) COLOR (PLAT- INUM- COBALT UNITS) SUS• PENDEll SEDI- MENT lHG/L) sus- PENDED SEDI- MENT DIS• CHARGE CT/OAY) DIAH. '6 FINER THAN o002 MM DUJ.t. 'i F'lNER THA,. o004 Hlof t>IAH. iJ F'INER THAN .ooa H"' 01 •••. 11.30 3970 JIJL os ••• AUG 2,400 8590 11 ••• SEP 26 ••• 1600 13700 1830 1890 DATE .JUN 01 ••• .JUL os ••• AUG 11 ••• SEP 26 ••• sus. SED. FALL OIAM .. '5 FINER THAN .016 HM 16 33 33 sus. SED. FALL DIAM. 'i FINER THAN o031 HM 27 49 47 a.o s.o 3.5 sus. SED. SIEVE DIAM. ~ FINER THAN o062 MM 44 57 65 32 5 sus. seD·. SIEVE DIAM. ~ FINER THAN .125 HH 61 63 80 47 630 6750 1510 3SOOO 1420 52500 124 633 sus. SED. SIEVE DIAH. 1J5 nNER THAN a2SO.HM 78 72 93 73 4-12 sus. SED. SIEVE OlAH. '6 FINER THAN .500 MH '90 86 99 98 2 7 9 sus. SED. SIEVE OIAM. ~ FINER TH~N 1.00 MM 97 97 100 100 6 It 16 sus. SEO. SIE'IE DIA~ot. '6 fltiER THAN .Z.oilO HH 100 too 10 18 23 I I I I I I I ·I I I I I I I I I I I I I I I I I I I I I I I I I I I I TABLE 4.11: SUSPENDED SEDIMENT TRANSPORT (Source: Ref. 5, ~ Station Susitna at Gold Creek Susitna near Cantwell Susitna near Denali Maclaren near Paxson Sediment Transport (Tons/year) 8,734,000 5,129,000 5,243,000 614,000 TABLE 4.12: RESERVOIR SEDIMENT INFLOW Devil Canyon Watana Vee (2300 feet W.S. El.) Denali (2535 feet \~. S. El.) Note: (Source: Ref. 5, 6) Upstream Sediment Inflow Develop~ 50-vear Volume -c'acre-feet) None 252,000 Denali 138,000 Vee 94,000 Watana 35,000 None 204,000 Denali 102,000 Vee 59,000 " None 162,000 Denali 44,000 None 290,000 50-year unit weight of sediment is 80 lbs/ft~. 100-year unit weight of sediment is 81 lbs/ft • 4-13 Init.\al Unit Wei;;ht-. (lb/ft)) 65.3 10.6 70o4 68.,6 Sediment Inflow 100-~ear Volume {acre-feet) 497,000 272,000 186,000 70,000 403,000 202,000 116,000 320,000 87,000 572,000 ' Typical TABLE 4.11 USGS Water Quality Records . (Source: Ref. l.i)_ SOUTH-CE~TRl..L ALASKA 1:;:9:!000 SUSIT~A RIVER AT GOLD CREEK~-Conr.inued h~TER-QUALITY RECORDS r::.r<:;:m vF ~!:<:ORD.--\;a~er }'ears 1S49-5S, 1962, l9b7-68, 1974 to curren~ year. r~.s'::::..miE:\IAliO~.--Terape:tature recorder since July 30, 1974. RE!<!ARKS. ---:0 record Oct. 1 t:o ~!ay Z3 and July 9 t:o Sept. 30 due to recorder ::~ali:.mct.ion. DATE OCT 01 ••• Mt.Y 10 ••• ta ••• JUN · 14 ••• JUL 28 ••• AUG 10 ••• DATE OCT 01 .... MAY 10 ••• 18 ••• JUN 14 ••• JUL 28 ••• AUG 10 ••• TlME 1400 1830 1000 1630 1730 iNSTAN- TANEOUS DIS- CHARGE CCFSl 5.3!o0 3760 14200 52\.100 21000 1430 .200QO DIS- SOLVED SODIUM INA) CMG/U .• --TOTAL ALUM- INUM (AL) DIS- SOLVED PO- TAS- SIUH (I{} ~MG/U DATE fUG/Ll TOTAL ARSENIC tAS) HJG/U OCT 01 .... MAY 10 ••• 18 ••• JUN }4 ••• JUL za ••• AUG to ••• _ ... 14000 5 13000 12 \!lATER OUALITY DATA• 'WATER YEAR OCTOBER 1976 TO SEPTE'-~9ER 1917 SPE- CIFIC CON- DUCT- ANCE (MICRO~ MI10SJ 102 163 BIC:.R- BONATE £HC03l , (MG/Ll .28 55 TOTAL BA"lUM IBAI CUG/Ll 0 soo AIR PH TEMPER- ATURE <UNITS) IOEG Cl 6.8 17.0 ?.9 CAR- SONATE IC03J IMG/Ll' TOTAL CAD- MIUM !COl 0 IUG/Ll <10 <10 Ols .. SOLVED suu~.lrE tS04) IMGIL) 14 TOTAL CHRO- MIUM ICRJ IUG/Ll 3.0 40 4-14 TEMPER- ATURE IDEG C) 3.5 1.0 s.o 14.0 12.0 DIS- SOLVED CHLO- RIDE tCLl tHG/Ll 15 5.4 TOTAL COPPER (CUl !UG/L) so so COLOR l?LAT- 1NUM- COBALT !JNITSl 45 25 DIS- SOLVED F'LUO- ~IDE tF) lHG/Ll .1 TOTAL IRON (f'El UJG/L) 20000 18000 !)IS- SOLVED O.li.YGEN IHG/L) 12.2 11.1 DIS ... SOLVED SILICA csro~, CHG/L) DIS- SOLVED iHON lrEl fUG/L) 100 HARD- NESS tCA, MG) l!'1G/Ll 36 75 DIS- SOLVED SOLIDS CRESI- OUE AT lSO Cl VIGIL} 63 76 TOTAL lEAD iPBl WG/ll 100 <100 NON- CAR- BONATE HARD- NESS IMG/L> 13 30 OlSe SOLVED SOL, IDS CSW4 Or co~~srr TIJENTS> tMG/U 56 130 TOTAL ~AN I:;A"'E:SE p4"') llJG/Ll 370 320 DIS- SOLVED CAL- CIUI-4 I CAl (HG/L) 12 23 ots- sot.vE:o NITRHE PLUS NITR4TE IN) (1-\G/L) DlS- SOt.VEO H.lN• SANE;SE PiN I lUGil.l 40 180 OlS• SOLVED MAG• NE- SIUM. CMG) {MG/L) ~JlS SOLVEO 0!\THOco PHOS• PHORUS CPl (HG/L) .02 .02 TC~4L HERCURY tHGl i.UG/U I I I I I I I I I I I I I I I .3 I I I I I I I I I I I I I I I I I I I I TABLE 4.13_! cont I d) .Typical USGS Water Qua 1 i ty Records (Source: Ref. 14) SOU~H-CENTRAL .ALASKA 1SZ920GO SUSITNA RIVER AT GOLD CREEK --Continu~d VATER QUALITY DATA• VATER YEAR OCTO~ER 1976 TO SEPTE~BER 1977 su~. SED, fALL sus. SEO. fALL sus. SED. FALL sus. SED. FALL sus. SED. f"ALL DATE OCT TOTAL H0LY8- 0ENUH tHOl IUG/LJ TOTAL NIC~EL <ttl) <UG/L) TOTAL S~LE tHUH (SEl tUG/U TOTAL SILVER !AGl (UG/Ll TOTAL ZINC <ZNl (UG/Ll sus- PENDED SEDI- HENT lHG/Ll sus- PENDED SEDI- MENT DIS- CHARGE tT/DAYl OIAH. 'l fiNER THAN .002 HH OIAHo 'l FINER THAN .004 MM !HAM., $ f'INER THAN .ooa MH DUM. ~ F'iNER THAN .1116 HH DIAH. ~ FINER THAN .o:n HM 01 ••• HAY 10 ••• 18 ••• JUN 14 ••• .JUL 26 ••• AUG 10 ••• DATE OCT ot ••• MAY to ••• lt! ••• .JUN 14 ••• JUL 28 ••• AUG DAY 1 2 3 4 5 6 7 a 9 10 11 1~ 13 14 15 16 17 18 19 20 21 2Z 23 24 25 10 ••• 1 0 sus. SED. FALL O!AH. $ FINER THAN .062 1-iH 40 so <SO sus. SED. FALL Dl.AH. ~ FIN~ THAN .125 lo!H 62 0 1 sus. SEO. FALL OIAH. $ fiNER THAN .250 HH 84 <10 <10 sus. SEO. FALL DtAH. '& FINER THAN .sao HM 97 80. 80 sus. SEO. FALL OtAM. 'l FINER THAN 1.00 MM lOG 144 10 120 1110 1220 42600 915 394 128000 22300 656 35400 sus. SED. SIEVE DIAH. '1. fiNER T}'!AN .062 HH 44 63 7.0 65 sus. SED. SIEVE DIAH. '6 F'INER THAN .125 HH 64 76 80 74 7 2 14 13 sus. SED. SIEVE' OIAM. % FINER THAN .250 HH 87 90 92 86 4 19 19 sus. SED. SIEVE OIAH. $ F'!NER THAN .500 HH 99 99 99 95 11 6 29 27 sus. SED. SIEVE DtAH. il rtNEI?. THAtl 1.00 jl,~ .. .. 100 98 TE~PERATURE (QEG. C) Or ~ATER, VATER YEAR OCTOBER 1976 TO SEPTE~SER 1977 MAX 14IN MAX MIN APRIL MAY J.O s .. s MAX 6.5 6.5 7.0 s.o s.o s.s 6.0 6.0 s.s 6.0 s.o 4.0 s.s s.s s.o 6.0 6.5 s.o 6 .. :5 7.5 7.5 6.5 "!.o a.s c;.o 9.0 9.J. 10.0 -;.s ::;.s .JUNE MIN J.S 3.5 4.0 3.5 3.0 3.5 3.0 J.O 3.5 4.0 4.5 4.5 4.0 4.0 4.S S.tl s.o s.s 6.0 7.0 7.0 ~ • .1 1·,.s a ~ -.. 7.:; MAX 9.5 10.0 9 .. 0 9.0 9.0 10.5 u.s 12.0 4-15 JULY MIN. 7.5 7.5 7.0 7.0 7.0 7.5 8.5 9.0 HllX MIN AUGUST 27 11 44 39 sus. SED. SIEVE DIAH. ~ F'INER TH4N 2.00 loiM 99 MAX 22 54 52 SEPT!:; 9E~ Date 11/17/60 01/03/61 05/01/61 11/26/61 01/20/62 01/07/63 02/19/63 04/04/63 Date 04/10/62 01/07/63 02/19/63 04/04/63 05/02/63 12/23/63 Data 03/18/50 12/28/50 02/21/51 04/01/52 03/18/53 12/19/53 02/11/54 03/30/54 04/24/55 . 01/05/56 04/17/56 TABLE 4.14: ICE OBSERVATION DATA FOR SUSITNA RIVER PAXSON Measurements made on Maclaren River River Ice River Ice Width Thickness (ft) Width Thickness (ft) (ft) least Greatest Date ( ft) least l:ireatest 50 slush 1.1 12/06/63 Missing 2.2 2.8 48 slush 2.7 03/12/64 45 4.7 5.2 17 slush 2.0 12/04/64 48 1. 7 4.0 Missing O.B 1 .. 4 02/08/65 46 3.0 3.6 Missing 2. 0 2.5 01/21/67 50 1.5 2.4 Missing 2.0 2.3 03/27/68 108 2.4 3.4 Missing 2. 8 3. 3 04/16/68 60 4.7 5.2 50 3.3 4.2 CANTWELL Measurerrents made on SusU:na River River Ice River Ice Width Thickness ( ft) Width Thickness (ft) ( ft) Least Greatest Date { ft) Least Greatest 320 0.6 4. 7 03/12/64 220 2.6 4.3 Missing 1. 3 3.8 02/08/65 250 2.7 4.2 Missing 1.5 4.0 01/21/67 280 3.0 5.3 220 1. 8 3.2 03/28/67 80 2.3 5.2 290 2.1 2.7 03/23/70 212 3.1 4.2 100 1.1 3.2 GOLD CREEK Measurements made on Susitna River River Ice River Ice Width Thickness ( ft) 'tHdth Thickness ( ft) (ft) Least Greatest Date ( ft} Least Greatest 210 2.1 3.9 03/15/61 310 1.5 4.0 80 1. 3" 3.2 01/04/63 Missing 2. 3 3. 1 95 2.1 4.2 02/20/63 Missing 3.0 4.6 360 1. 9 4.2 04/05/63 220 3.4 5.7 332 1.1 3.9 12/23/63 Missing 1.5 3.4 299 0.4 3.4 02/19/64 270 1. a 3.7 472 2.0 4.6 01/12/65 170 1.6 3.8 424 3.4 4.8 01/19/67 130 2. 3 2.8 360 1.6 4.3 04/08/67 155 2.7 3. 9 155 1 •. 9 4.6 04/15/69 582 1.6 4.2 130 1.5 b,.1 04/01/70 290 2.5 3.8 4-16 I I I I I I I I I I I I I I I I l I ! I I I I TABLE 4.14 (Continued) I , Sl<WENTA ~~asurements made on Skwenta River I River Ice River Ice Width Thickness (ft) Wj.dth Thickness (ft) I Date (ft) Least Greatest Date ( ft) [east Greatest 03/14/61 270 slush 2.9 03/16/64 200 slush 2.9 05/03/61 320 1.9 3.8 01/13/65 95 o. 8 1. 9 01/18/62 Missing 2.4 3.1 S}/19/65 85 2.9 4.4 I 03/09/62 Missing 2. 3 2. 9 02/01/66 250 slush 2.6 01/02/63 Missing 1.5 2.5 02/14/67 220 slush 2.7 02/18/63 Missing 3. 2 3. 7 03/29/67 120 2. 3 3 .. 1 04/05/63 235 2.9 4.1 03/26/68 230 2.2 4,0 I 11/27/63 Missing 1. 0 1.6 04/01/69 118 1. 9 3.0 01/23/64 Missing 1.9 2.7 01/19/72 165 slush 4.5 I TALKEETNA Measurements made on Chulitna River I River Ice River lee Width Thickness (ft) Width Thickness (ft} Date ( ft) CeasE Greatest Date ( ft) Ceast Greatest I 03/15/61 125 slush 5.0 01/18/67 170 1.2 4.9 11/27/61 Missing 0.7 1.8 04/09/67 190 2.4 4.4 02/02/62 Missing 2.0 3.0 03/26/68 260 slush 3.1 03/29/62 Missing 2. 8 3.0 12/23/68 278 open 2.2 I water 01/03/63 Missing 2.4 3.5 04/04/69 165 Oo2 3.0 02/18/63 Missing 2. 8 4.2 03/31/70 190 0.9 3.5 11/27/63 Missing 0.2 1.8 04/01/71 zoo 2.2 5.3 I 01/23/64 Missing 1. 8 3.1 01/18/72 195 o. 5 2.4 01/12/65 180 1.3 4.2 04/17/72 145 2.3 5.0 I TALKEETNA Measurements made on Talkeetna River I River Ice River Ice Width Thickness (ft) Width Thickness (ft) Date (ft) CeasE Greatest Date (ft) [east Greatest -- I 01/04/66 182 slush 3.2 12/21/68 207 1.4 2.1 01/29/66 155 1.0 3. 2 04/03/69 210 open 3. 3 water 03/16/66 135 0.7 3.0 04/01/70 218 1. 3 2.3 I 04/07/67 170 1. 7 2. 9 03/31/71 285 1. 1 2. 8 01/10/68 245 0.7 2.3 I I I 4-17 TABLE 4.15: PMF ESTIMATES AT OTHER DAM SITES ..;,(_So_u .... r .... c .... e_ •• _Re ... G...,?, , §1. Dam Site Denali Maclaren Vee Susitna III Watana High Devil Canyon Devil Canyon PMF Estimate (ft3/s)* 120,000 '141 '000 177,000 183,000 233,000 .264,000 267,000 TABLE 4.16: RESERVOIR SEDIMENT DEPOSIT AT DAM SITES (Source: Ref. 5, 6) 50-Year Sediment Dam Site Accumulation (Acre-feet)* Denali Maclaren Vee Susitna III Watana High Devil Canyon Devil Canyon *Withoiut upstream dam. 4-18 290,000 243,000 162,000 165,000 204,000 248,000 252,000 I I I I I I I I I I I· I I I I I I I _______ lllfj __________ _ -..,.: u.. L&J ~ u <( en - -+=:> 0 I 0 __, 0 \.0 -u. lL 0 • z ::> ~ _J <1. :::> z z <£ 0 0 10,00 900 aoo 0 7000 600 0 500 .... ..... 400 0 "300 0 zoo 0 1000 f I .:::::----__ (.)--~ . -r-CuntP I \;;;! ~ .... -..trl If.'\(.') I I ..... ~~ . €?-.§< . D0 0 I · J -curv ~ 2 ---..:.. [\!!~ r--iO . r---e=: ~-·· -. .. --..... -----· .. . . . . . -~ . . . . . . . . ~----. .. .--... _ . .. .. . r-----. . .. . . . -~ r-:-..,_, . -. . ~ . . .. . . A- . --: ·-.. . . . . -. . . , .--_;;, -. . -.. . . -. . -.. . -.. . .. . ;, -.. . .. . . . . . . . . ~-. --.. ~-. . . . . . . . . . . -. . .. . '('"" . -. . . ' -.. .. . .. . NOT~S ... . ... ~ . . . . . . r---. . .. . . . ... . . -. -. -. ~ -. . . . . . .._. .. ~ Curve I based I on annual f]ONS ; • • . . . i---exclusive of 1969 wator year. FIGURE 4.1 . ··-· . ".---· -~. . .. :-. .. 2. Curve 2 based on annual f 1 OlliS --... . . ANNUAL LOW FLOW FREQUENCY inclusive of 1969 \'tater .. ----... . .. SUSITNA RIVER AT GOLD CREEK r---year. . . -·-.. -·-.. . {SOURCE: REF. 7,8) -... ... . .... --·---· ·-···-i .. ' . ' 2 5 4 0 20 50 100 JOOO 10,000 EXCEEDENCE INTERVAL IN YEARS -- .a:::. I N 0 ------------ -- - t-= \&.. . 0 <( "b -I u. ~ z :,') ~ ~ .... w :t: .... 2! )- (/) X t-z 0 ~ l N til 29.00~~--------~----~--r-~--~--~--~--~--~--~~~~,-------------------------------~ 24.00 1----t-·--t----+----·-~-1·---t---1---+---1-----.._---J--~·--t--1 .. -' ' -r-'·. •J . - II. 00 '"---r.-1··· ~ .. -r.--+-.-. -.--.. ~-~-::-_~_--~j...:..--1---J-.-..,....-4-.. -.-.. +-_-.~-:-:_:_:+-.-. -.-. -1~~.-•• -._-.,.-1. t-.-.--+-·-----+----+--+---+...;·:lj..·-crl·~.:;... t-.-.-r--t---~-t . ·--..... -· r-:--· .. ~·-1- J ! • '. ----'-...... .. .. .J..,.. ..... I ~ .... -- --·-··-·~. .... -. ' ··-••.•• r-'-·- -~. -·- -... ,.... ..,..: -· -..... . "' ... ... -' -------· --_, ...... --~-·-·-· ··--·-·-· --·- I 1 ; . __ .,. __ .... ' ... ~-. ...... . ... . _,.,_ EXCEEOENCE INTERVAL tN YEARS - .. ..J:::> I f"-.) --' -----.. -.. -.. ----- EXCEEDENCE FREQUENCY PER.HUNDRED YEARS 99.9 99.8 99.5 99 90 95 90 ffO 70 60 SO 40 · 30 20 10 5 2 1 0 S 0 2 0 1 • • . ' • . • J I I I . -I l i . I I I . I • . ---··--. 100,000 90 ,000 80 .ooo To.ooo ~c.ooo 50 ,ooo . U) ....,: •o.ouo . 0 z so.ooo - ~ 0 it ~G,OOO ~OTES: 1. Frequenc)· Analysis is based orA 23 years of record (1950-1973) . . :.::=~.:- 2. frequenC}: Cur\'e \\·as computed using the Log Pearson Type II I ~k:thod ·· ·-·--- -----!---. . • . • • --·---.L_ -------·--· ----"-.. -------·-------..------·(-;... ~ =··· =-. , .: ......... < ·---·-'-'f"'~~-~~~-t------...l---'--t~~-t--t--t-"'-l--_._-1---l--f--l---+-c--~f-....,..J........,..4--"'--- ·-···-·-···-·--··-f-·--·-·--------· ---~ k-:':':~ ·--·-·- . ·-- . --I. -_.. : .. ::__ ___ . . .. -... "' .. . .. . .. ..... --...... - ., .. ----· -" --·- ··----·-· ........ -·--·-'"'---. .. -·,. . " ,. ... .. .. ·-· ·--~---t-->.-'--,. r--1-~..;.,....,.,.,.r:-~-~::;,.-¥.,-..........__ ..... ___ ·I_._..;. ~ _..:_ :.-:-. -+--· -1---· ._;. -. +-...;;.' -·· ~::_··~ ~· ;:_· ·...::~· ..:..: ·..;_· .J.-,:....::~:....::--~"~:_::;...:;·~.: -~-_.., ' <. .. .. • .. ... .. ... • . :::: .. _.... ~ -:.:: ~-.. .....__;::::=:. ... _ -. ... .. ..... _ ---· ... -----,..;.; -·----..... ---. -·-· . ~ .::. .. .. - 1---t---+--f-::....o . ../".:::::;;. ·4---· -· --. : :. : : . . -. •• ~ -~--__......~ •• ' ----·· •. • 40 ··-------••• --·. ~: ... . ··--·--· -· . .,.,..._ ...... - ·: .::_~ :-:--: :.=-: . ~:: ... ·.:::: ·::: ~:::..,:_:=.:.. ::·.::.: .. ~:·:: ::::-: .:==. ·:.: ~· . -. .. ......... -.. . ....... -.. ,. ". . . . ..... . ---· .. . . --.. " ...... ............ ···-· ·--· ., .. ,., ·----...... -___ ... -----.. •·':"' ... <1......... . ..... ·-... ··-.......... ----·-·-.._ .... - ......... " ~-· .. ·-----1lr"" --* ·----......... __ _ • ..._ .... ----............................ r...- FIGURE 4. 3 (Source: Ref. 7 ,8) ---r-· --· --_,.. .. --· ,., -· Peak Discharge Frequency --·- .. _. . ... ·----· _-_ t---t---+-+--+-_-__ -___ -4--_ •• ---~. • SUSI TNA RIVER 1------1 ------... ........... ~ ....... _.,. -. -.. --~-------·---f-.···- ._ __ ---...... ·--...._ ___ ... .....,._. --__ ._.. ----· ·--- At Gold Creek ----·--... __..,...._ to,ooo ~-~---+--~--+-----~--~---~~---+---~--~-~~-4~!~~~1---------------·--~~~l---~ I.OJ 1.1 2 5 lO 20 50 100 1000 EXCEEDENCE INTERVAL IN YEARS -- D I I I I I I I I I I I I I I I I I I I II SC.C.LE 15 20Mries I _, r. 30-'\ ( 1 l \ \ l .\ ~} -- FIGURE ~:4 (Source: Ref. 7,8} I I I I I I I I I I I I I I 1: I FLOW IN C.F.S "' .._ ' •. ' 1 • PRECI~ • ·~· ,~TAT!O~ ••••. , •• , •••...••••.......•••....••.•••. ~ .•..•..• ~···•·•!···rr''Jfl"'l'""············ ELEVATION IN FEET IN me~ ,3G;O.J)OO ....... • .................... 11' .. " • • ._ ~ .... " • .. "' • ........ "" .• " •• lt • "' ...... • .. ,. .... * , ..... ._ .... • • • • ,.. .... " ............. , ,. ................ ,. ........... -.. -¥ ....... , ..... ,. "'" ~ " • • • ., ...... "' ..................... "' .......... ~ "' •• l> ... • ............. ~ .............. .. ZZIO PRECIPITATION 320,000 ••••••••••••• -•••••••••••••••••• -•••••••• . ... ., .. -.. -,. ...................... ~ ... "'' -.. ...... -... "' ... _.. .. ., .......... . NORMAL MAXIMUM POOL 28QPOO------------------------------~~~E~L~E~V~AT~I~O~N~•~22~0~0~F~E~E~T----------------------------------------------~--------------~--------------~ ELEVATION ••••••••••••••••• 220!5 , • ~ ••••••• , 2200 2.4 Q.OOO '"' ..... ~ • .. • ...... · .. "' --.. • • ""' ..... • .................. ~-............................. -· .............. ~ __ ................ ,. ...... .., .. '\ ................... ,. ............. -· ............... ;;. -... " " "'" ......... -............... + 't-. ....... -...... ,. ...... --... -......... "" .... ~............ • .. '! ............ " ........ -................ " .......... " ................... "" .................... .... 20~00 -...••.• --•••••.•••..• -•. ' .................... "" '"' "' ... ' ...... -;. ... .., "' •· .. " ............. "' ...................... ~ .. ............................................... ... .. ., ......... "" •· .... -............. "" ............... -......... " ·-.......... •· • ~ • !! •• 161¥)00 ............. .,. ... -... ,. ...................... ,.. .............. ~ .. ~··· .. io ... -..... ..-..... -.. -.. -........ .., "" ................. ·• .............. , ..... --,.._ - -....... "' • ·"·"···-···,. ......... -_.r-... _., :l .__ I?.OPOO • • • • • • • • • • • • • • • • · • • · .. 4 ................. --................ o~ ................................. ~ ....... ... ..... -<' ............. " ........................... -....... "' -~ .... "" ... .. ,. •• c ................ . /TEMPERATURE J_J / ~ ~ a 0.000 •••• ---•.•••• -•.•••• -•.•.••• -•..••••.••.. ,. ••...• -••.•.•• -...••••.••.•.•••.•. ,.-:-:":> .•..•.•.•.•.•••••••••••• -...... r• _r'-\ .. -.--.J L-. r-, ,-- ,..---..., l -'-1 ...------· 1 I t .---'~ '----' -··-············ ................... ,.. ................ ~.,.. ........ ,.,_ ......... ;.,"'-~ '------------. ...---'· L-J '---..__.__, I '---\.._.. I 40,000 :..:..:..~· •• -••..•.•••.••.• ~-·--'· ••.••.•••.••• -•.•••••••.•••••••••.••••••.......••.••.•. -••• .. ........................ .,., -............ ,. .... 0 ~ ... _______ ..... _-:-. -:.:-.:-::.-.:-::.-:.:-:-. -::.-:.:-:-. -::.:-:-. -::.-:.:-:-.-:.:-::.-:.:-::. -:,:-,:-:.-:.:-::.-:.:-=.-:.:-.::-::-:.:-:-.-:.:-.:-:.:-.:-:.-:.:-:.-:.:-:.-:.:-:. ":.':.::-:.-:.:-:-.-:.:-:-. -:.:-.:-:.-:.:-:.-:.:-::.-:.-:.::-. -::.-.:-:.-:.:-:-. -:'· ~-.... -... Wl!l.TANA ~r~-r··• • ···-.. --=-·-·--e~~··-~··~~w~:~·••!~~··-·t·~~~···~~~r·~-·r:c~r·r:<~~~--·~~~~~·~··•~:r~~~~--~~-·rc:-~~• •-1••~ ~tC*~••r-·~~" • *~~·~-~~~·r·~rc•r~~~-~~•r~t~e~~rT~~~~-~~rr~.~~'~t~~r~c~cr~c••~r~~··r ~ '••~t ~rslr-~• -~·-~·ecr:~~~r:~=~t~~-~~~t~~tcr~~'ee:t~~e-t:cef~~~~c~~~reLe~~c~ec~~~c~~~cc~rc#••~~rc~r~rccc::~<::•'~t:-•••••·•~·~~:t~~~~~~4 t • ~r·.~~?i~~~~~<rT~t~•~~ccc~cc~c~~~ccsc-rr 4 r~i~~~~ic~rTc~-~*~cr·cr~r·~~·~· ~~~~~, ~!~-·!!~;~:'~~~'·:~~·!~~~;t··!~~s~~~-~~-·!~~~~z~·~:~~~~,~~~,·~~-~!!~~~!~·~~-~!:-·:~-~~~~~~!~T~!-•!!~·:~~~~:-~:~ •::··:.~·:~··:t~~~~-':~~·:A-~~~~~~~,·~!-·~r·~!:~$:!~~~:~·=~ ... ·~~--~~~~~~-·~!~~~t~·~~~·!~~·:~~·:~'·:~ :::::!:::::::::::~:~=~~~~~~=:~~:=~~::::~:~:::~~=~~=::::~::::::=:~::z~::~::~:==~=~=t~:=~~=:~~:::::~~~=~:=~:~:::~:.~:=:~:::~!:~:::~:::~:~:::~:~:=:~:=~=~~:~:::::~~~z::::~~==~=~=~=~~=~~~:::~:=:===:====~:z::~~:~~~~~~ ~·:::::::!:::~:!:~::::!!!!::::::::::::~::::::::::!:::!:::::::::!:::::::::=!!!:!!!!!!!::!!!!!!!~A!!~~!!f~!~~f!!•t•'f!~~~~~Z!!f~!f!!f~~!!ift~!t!r~f!!t!!!!~~~~~-!~!~!!~!f~~!!!!£!!~!!!!~!!f!W!l~~!!S!!!tJ!!~l~~-t!!tt ;; ••• ,~~·•••~••••~-I~'~'•••.c~~•••••••••••~~~·~•r~•••~~•••~*•••s2~a••••~·~~·~~7•·•••••w~~·~••~· -·.~~~~~,~,,~-~.-~q"-~-~·~~-~-~~~~,~~,--~~-~~~~,~~~~~··~~--~~,4~--~~,~,~~;~,~,~;~,~,;~~~,~~~~~-~~,~~~~~,~~~~~~,~,~~~~~~~~~~ '~~~7!~;-:::::~::::::::!~!!!!!!::::!::!!!!!~~f~~~;~!~~=:~:::::~~~~!:~~!=~=~:::~~:=~~Z!!:~~=·---~-~------•••~~·-4 ~·•~-~~~•••~~r••~~~~~:::~:=~~=~::::::::!!!~~::::!!!:!!!!:ii~:~~~:~::~::::::::~~:~~~:;:~:!;:~::z::,2! FL~~s'· ······ .. '"'" .......................... 'I"[ II'' (I' ... ' ........................................ , .. If' Ill .JG opoo · ..... · "' · ... · · ...... · ... -.... *' • • .... • .. • .... ~ .. -· .. • .... -..... • ... • • • ...... • ..... ,. .......... • 'P • • • • • • ,. • • • • ·• "" ··-•· • • • ., • • • ·"' • .... --.. • ..... • ... ·-• • • • • .... -• • .......... :21&--. .. -. ...... 0\-•• 'II ••• ,. ...... --......... ~ "" .. -t ...... .,. ..... --... t 4 ......... * .... ,. .• 1460 ... .... "" ..... ,. .. PRECIPITATION 32 0,000 ... -.. -..... ---....• -.• --• -.•..... T~MPERATURE · _,.,..ELEVATION ~ .. ., .. .-...................... . 4 .............. .. 1455 ......................... ~ ................. ~ .... _ .. ,._,.. ......... ,. ............. , ................ ,. ............................... .,"' ........... -. IN DEGREES /~ fAHRENHEIT C NORMAL MAXlMUM POOL ELEVATION " l4!!10 FEET / I"50 2:eo.ooo-·-....:..===:..:..:.=.:..:...__ __ t::..._ _____________________ . ____ __, • ·" • • • ·--· -----------.......!.:l!:::!-~-- 2-40.000 ••..••••. co.. -............. ' ....... -......................... ~ ...•............................. -.... . 200,000 • • • • · · • • · "'I'D • • • • • •••••••••• , •••••••••.••..•••••••••••••••••••• , ••••••...•.••••••••••... 160,000 •••••••. ·(.C) ••• '"'•••<~-'···· ......................................... . .. .... '"' ........... "' .-J- •• .--120,000'-•..•.•. '50 -..••••.••• -••..••••..•...••...••...••.•..•...•..•.••. , ....••.•• . TEMPERATURE j .J ~UTFlOW . -~ .. t~~::-:-:; ........................... . rj LL_,_ ~--~ ......... ~...... .. ......... ,. ............ , ....... ., .......................... ~~-·· ,-INFLOW ~ r-___. ' -.-... "' .. '" ...... . I . .,,_,,_.,. . . . .(':": ~ . '---J a o,ooo.: ·. · · • • · · ·40 · · · · -· · · · · • · · · • · .r.:-;4 · · · · · · · · · · · · · · · · · · · · · .r.-.-::' • · ..... "' .... ~ ...... .,. ...-........... '"' ... ~ ,. ...... ~ ........ -.., ... ,,. ,. .. "' ill • , .... ,__ ,.. ......... .,. •••••• ·• • '* .. .,_ ... ;o .... t il-... "' ..... PREC I PIT AT ION IN INCHES 3 2 ~--•-r-J \.-:-~ ,--.J l ,_____ l ~ 1 r--._.J ..__.J '---J .___.,J ..__ UPPER FIGURE 4.5 SUSITNA RIVER BASIN . 40,000 ••••••••• 3Cr • -••••• -••••••••••••••• -••••••••••••••••••• . ............................ ..,._ ........................ , ..... ,.~ ........... 1> ............................ ~ "' .... * w ••• "' .......... "' ........ " .......... .. . 0 ... ·• -t ......... ,., 'lt 'I "' .... ~ ... ,. ..... ,.. jl ..... -.-oil-...... -......... ~ ..... ,.. ~ ~ • *'. DEVIL CANYON WITH WATANA ... .. ~ ......................................... .. ~~· -· ;.: !..:;. ... .; ! :: ~ :-,..: ~: !: ~ ~ .: ~:.! ~!:!~! .: :::: ::..~:::::.:: ~ ~ ~!::. ... ::.:::::! ~::. .! ! ! :.~: ::: ~ == ~ :.:: ~~:: :::::: ~~; ~;·:-~:.:~~::-::~::::":. ~:.:, ::'~.:=-.;.::. .;.·:..:, ... : .. !' ::-::. ::-::::::~:~::.::=~=~~,====~:::= :::: ~:: :-:~:: :-~=:.:.::!:: :-~ ::.:!: ::..:!: ::·~~~:~:~~::::!::::::::::::~:::::: ::~ ·. ·;;.~==~::lf:!,l!!ft!lf!!~l!lf!!~!~:!!!~!!!~I!f!!~!r!t~!!rt~!tJf~~t!!!!!~Jtl!!!r~~~~!~!!!trrrr~!!!!!Iri::~::r ·~!~·a!t ~.~~·~·••·t~~·~••s,·t•••~~~•••t·•••~~ ; ~~· --·--~--~-·~-~~~,-,~~~-~,~~~~~·~~-~~~~~~~~~~~~~~~~~~~~~~~~~~··~~,~~~~ ·~~;~~~~~,~~-,4~,~~,~~~~~~~~~~~~~~~~-~~~~~~~~~~~--~~ 't ;, ~ ~ ~ ~::: ~ ~ ~: -~ ~.!' :=: ~ ~!~:: ~:~' ~ ~!; t; .: %-• .. .. .. .. ~ ... " ~ " ... J!l<· .. ~ ~. ,.,~rf'' , ....... 4' ··---....... it' ••.•• 'J' !!!1: :::=~:·:-~:::~': !!,! ~~;:::::! !!'!:-::: :·: :.!!.!''!~!··~!;~ :;:.:.,~~~~ :: :.~..:~::;:, ~::~=-~ !~ ::-:::::!:! !! ! ~! =: ~; 4--23 SPRING PROBABLE MAXIMUM FLOOO HYQROGRAPHS DEVIL CANYON AND WATANA PROJECTS (Source: Ref. 7,8) J I I • I I I I I I I I I I I I I I I I _F_. _1:._o_r._V:_s._l_N_ .... ~ ......... '. ' •••• ' •.• '. ' ••.•• ' •• ' '-•••• ~ •••• ~ ............ ,, ................. "' ............ " ,, •• f t t I I I (. ' ! ~ ••...•....•.....••.• ' .••.. ' ~ •..••..•••. ' •..•... , f r I f r I r rr 1 r · • • · · · · · · · • • · 1 • • • ·--• • • • • • • • • • • • • • _E_L_E.::v:.:.A...:... T-=to.:::N..:..· PRECIPI- . ·TAT !OM IN FEET IH INCHES 360,000 ............ .,._ ..... '"' ........... '"' .. -..... 4 .......... ., .... --.... ~ .... -· ................ ,. "" •• "!-... ~ ... ,. ...... "' ....................... -.. ........................ "" .... ,. ... 1!-.. ,. + "' ................ "' ........... -......... " '"' ............ ,.. ~ "' ., • 320,000 ••••••••••••..• .................................. -. ........ 1'·'"""'"' .. "' ................. -"' ..................... ,.. ..... " " # ... "' If~ ....... -.. "' .... ""-.... '" '"" .... -... .,.. • 2BQPOO---------------------------------L~--NO~R~M~.A~L~M~A~X~IM~U~M~P~O~O~L=----------------------------------------~---------------- ELEVAT!ON ,. 2200 FEET 2 4 ~000 .............. 4 !I! .... >ill .... •· ..... "' "' ..... " "' ..... --........ " ,.0 ...... "" -.. ... "' -.. "" ... ll' ........ ~ ... "' ..-"' ~ ---,..-,._ ,. ... ~ ..... -.. -..... --,.-• ,.. ..,;-......... -'»-• 4-~ • -.. , • ~ " .. ,... '" ... ""' .............. ~ '"' • _,. _., ............... -..... " -... ll' _.. ._ " -" ; ...... "' ......... "' '"'-• to "' ~ ••• jl> ~- 200,000 .•• -••••••••••.•.••••• . ~ ................................ ,.. .. ........ "' .......... ,. ... ~ ........ .,. .......... -.. <l·····•••lo•••••"'""···· 160,000 •. -•• -••••.••••••• -.• -•••..••• - . . . ' ••.•••••••••••••••••••••••••••.•••••••••• ~ •••••••.•..• .. ...... "' "' ,.-_.r--._._, r ..... 120POO • • • • • • • • • • • • • ••••••.••••••. _.J ············-···-·······-····················-···-···-·········-·····-·-··············s········· TEMPERATURE r 2.210 PRECIPITATlON ELEVATl ON ••••••••••••••••• 22.05 ••••••••••• 2200 ... --. Jo---.J --, ••••••••••.• '( .••••••• -• t •.• -• -•••••••••••.•••• -•••• ' _} Li ' I '---,__..._ . f~~ourf.-l.ow .......... ·-· -~":7:l--~..:~ 80,000. .__., ............ ,..'t .......................................... .. ••••••• / •••••••••••••••••• -• -•••••••• -•• -~-;-:> •• -•• -•••••••••••••••• -•• -.::-:-:-:--••• .. ................ ,.~ .. -................................................ .. rl .---, r-.--..J .___,. II r--~----. _..._.~ '---.. I ' • • ' I ' .-----· r • ----.___. ,___...... . ' I "---'--1 L_j --·-· ---' 40,000 ..•••... )" ...... -•..•.••.•. ":":'\....---.J •••••••• ' •••••• ~ ""-__r-- ............ _ ... .,.. ......... _ . ..., ............ .. WATANA 0 .... -·~··-..... ..._ ..... _ .. ~ ......................................... ..,, .............................................................................. _ ............. _ ........................ --. .... . . ... " ......................... "'~--.. -....................... ,. ........ . .. ......... "' ....... ., •· ...... 4' .. -.................. --...... •· .......... ~ .. "' !i~i~ f!Z l1f ~ ~~t~i~f~i ~ii~;~~ :tit;~~:! i,!~ i;i~;~~E~i~!if1~·~ itf~~if~!iii'[if; li~ ;!!i~1~; ii~: i ~~~;iii;i!i :i~i;i~~ ~~: i! i!l:~: ~~~=~:it~ :i: ~ · ~: ~ i ~E~ ~ i!;~ 1:~ if! ii~1Z: ~~it!fY~i!:~ ~!i; !~ !~l_!i~ i!~~li! frii~i i!:;!i~ -~lf!i ~!: i!.~ ~:~~=~::::!::~~:::::::~~~~~=~:~~:::~==~~=~:===~==:=:~==~:!z:::=:~~:z::~~:~~=::~:=:::::~~::~c~:~~~~~::~::~:~:~:=~~~~z~::~:~:::~~:;.;·~~:~:=~:::~:~~:~:5;::~~;~:::~:!~~=:~~=::z:-~:~=~~~~~~:::=~~~:~~!:~:::!~=~::::=: ·:::::::::::::;·:::::::::::::::::::::::::~::::::::::::~:::::~::::!!:::!:::::::;::::::::::::~rftl!!f!!!f!!~f~'~w~t!!!~!~~~~!!!~~~!r~~·~»f?!!~£~!~!!1!!~!!!~!1 ~,~~!!!!~!~!J¥!£! ~!!tc~r!•!~;~rr~!C!!!!!!!!f~f!!'!!~~~ i1•~•~1tt•t1••r,·•~·~=~~r·~•a•~~'•w~~a•r~s~~•••~~~-~~¥•,~•,r•·•~•••~•<r~••~~&~~~~••••·•~·~~~-,-~~~~~~~~~~~~~-~,,,~~~~~~~~~~~-,~~-,·~~ · ~Q ,~~~~~,,~,~~~~~~-~~~~-~~~~~~~·,~~~~~-~~~~~~,~~,,~,~-~~~-~~~~,~~,~~~,,~-~~~~~; ~~~~!~~:~:::::~:::::~!!:::!!!!!::::!~!!~!!!!~~~=~~~~~~~=~~:~:::!~~~!:~~::~~!:~:~:!:~:-::;:~---~~~-~----·~'~~#~~•~••~---••~-~2 ~''~~~~ ~=:~~==~:~:!!:~::::!:!!:::::!!:!·:==:!~t::~~~~~:::~~!~~::~t~~t!:=~:~t:~::!!:Z!55 ::::2 ·.~ :::: :·. ·.·. ::·.:::: :: ·.:: ::::·. ·.: :: ~::·. ·.:::I:: f ~::::: ·.: ::::': ·::::: :: ·_:" :: ·.:: ·_:: •. :·. ·.::: ::::::::::::::I~[![~~~~~~~;~~~~;~~·::::::·:·:·:·.::·.:·.·::: ~~~~v~:: 320,000 ••••••.•••••.••...••..•••••.• "' "' • " .. -.1 • ., ., ' .,_ ~ ~ • .-<' 1l • .... ~ " ... _., .. II ., <i-"' • ., ,.. 10 -"< II • _.. .. "" • • .. • oo " ,._ _.. • :• -• .., • _. .,. o. + • • >-._ ._ " • ~ • 'TEMPERATURE IN DEGREES FAtiRE.NHEIT r NORMAL MAX!M:JM POOL ELEVATION • (4:50 FEET 2s~ooo----~~~~~------~----------------------~----------------------------------_J .. ............................ ~ .. . •• -•••••••• 1455 1450 240.000 .•. ~ ••••• eo ......••...... + •••••••••••••••• -••• -•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• -••••••••••••••••••• 200,0 00 .••• ' ••• ·1'0 · .•.•....•.. ' ..•.•••..•...... 160,000 •..••••• '60 ....... . ,-..r- . I .--' 120,000 ••...• -.. 60 ..... "' ...... *' .......... "' .......... 4 .... ~ .... "' ..... ~ "' "' ~ -.. "' .. , .... ""' ,. .-. • ..... .. .. .. <I ... .. TEMPER;:.iUR€ :---' . / ~-·.J .......................... ,. . ~UTFLOW _..-... . X' --.J -. ....... ·~-'"' .... r ····"'~ ....... , .......................... ~ ........................ . I _; L-, r \_~ --,., ____ ., ~ ................................. ~ ....... ~..:..:..; ,..___. • . 0~ ...••.•...... ~---J PRECIPITATI·)N IN INCHES 2 FIGURE 4.6 2 ao,ooo • • • • • • • • ·40; • · · · · ••. -... -r.:Y·. · · · · · · · · · · · · · · · · · · · · · ·•· · · · · · · · '---r--.. r--' '---J,....~ r-..... 1 .-----t · 1 r--.__.) UPPER SUSITNA RJVER BASIN --1 ..__.] ,___ 40,000 ......... 30 ···~~~~-~~~~·---·~~~·-~~~-~-~~·-~··"' ,. • • ol •·,. _.. • IL .. a "' • "" • •'"' ..,. ,._ • '* • "' a • ... _. ,., • ,.. 'I 1; ,. " f' "' • "' -'" ..-r--, ~ T T J ) ~ .J J (: a' l -:' •. ~ ~ jl:. -t' ' 1: 'T ~ T I "! • = .. 4-24 ~ *' "' ................. _. "' • '1!0 • ~ .... .. DEVIL CANYON WITH WATANA ....... ,.. ............................. ~ .... ~ ................... :" ..... ,.. ......... .. .. . .. .. ... -· .. .., "" ...... ,; ............. .. ....................... ~,.,-... - -~~~"~--~~~~~,-~~-*~,~~~~~~~ft~~~~~~~~~~,~~~~~~~~-~··~,.~ ~~~-~~~·--~~-~-~~--~~-~-~--~-~-~~-~~~··----~-~--~~~~~- ~-~-·~~-•r-~~•••w~'<#~•---~~~--~~~7=e~·~~~-~,~~~--~-~#•~~#•••~•~~·~••••·••~•no-~~--~~~-~-~--~##•,~-~·-·•-~-~•~••~~~· -: . •*••··• -----·-~-·-··~-~-.. . -~-~-~-~~·~~~-~~~-~~-~-~~~~~--~~~~-~ ~~,·-~-~,.~ ~-* SPRING PROBABLE MAXI MUM FLOOD HYOROGRA?HS DEVIL CMiYON AND WATANA PROJECTS {Source: Ref. 7 ,8) - .. .J:::a I N U1 -·-------------- &sJ N -(f) "·'..-f---._-,-_-___ '"1'-~----~--.-:....----:--.,.f -.-_ _. -;-. -:-.-r-r_ -~: :r-t· :'+·.....-r.-rtn,. ~-·. =~ ---;:_f..:-;-.• -n. tt.e -· · ·· · · r---.. -. FIGURE 4. 7 ~-· · · ··· ~ ·:· .. 1--• ---· i---'-··t-1-+--+----f-L-1--4--4--li-1--l .... ---. . -' . --• . . • i • {Source: Ref. 7,8) : 1 :" " .. --. . .. !---· -· 1--------~--=-:. .. f--~: -- ~----·1--· ~--~----u.t----+---• ,____ .... f..-___ :.. ---. . . : . ! . ! v :· STA T1 QH. . :. :· ::1::.: v : IP: SUSlTNA At GOLD CREEK -·-i--4---i·--+----1-1-p.1 "'·~ -'c-7-~-+-l-.f--+--~ LEGEND . SUSPfHOEO SEDIMEHT SIZE AHALYSIS SUS l TNA Near CAtlT~~ELL V ~ ..)3 to --·--•• -----SUSl TNA t!ear OEHAL I +4--+l-7:r+--.--JPV',..:-+--+--+--+-i-+-l 0· ~--~ :~~ ~ ~ ~: 1--.---....,.....---r----...,_-,.--,-T'""TM-,A.-C_L_A_R'"'TEN_N_era-r~P...,Ar-X'"':'SO_tT"~ ___ t -.""· • ,..,,_7 v_i.$ '7'' ,.-·-': ""' -r>- ~ ·--. -· t,....:~~ ~;. w 5 i3 z -z f-•• • • i • • ••• I~"" •~ ---+---r--1·-f--f-if-+-t le _ .. _ ·--••. · • •· I ~ ·-L,-.-p -· ···-. . i . . . . .... :. . i /"""' ... ~r;;. . ...- • ·• ... ... : . : ::: : ~-•• • ~lf:t.,.. .. .. l .. " .·. -....... ... . --' _ .. -~~-~ .. ~7 =-.. : -..... .. ,....... ~ &0 c( :c ... a: UJ z -u.. ~ }f zo t=i :.~ ~·~ ~~ ~::: _,L. _ _ ....,.__~_.,_·==-.;...· ~--~· =~;.;,r·;;..;-+·;.;;..· .... • .... ··~-'·"· .. ~--+'-~·-·· =--· -.::-: : : ; ~ . : ; . . . . . . J-:,::...::~--J..-.!..' -~-..:.'-+-·~-;'-lH-1-+:-:--t-~t:--t--t~-;·--:·-:t-·-t--t-t ·'--'-·--+---1----t---lf--i-i---._ r-Io ..._:. : : • • .• -. . .I 1 .•• -• •. J . l---·· I · t • ' . .'. l . -·--·· .. L ~ t ' ·-~~~-~~-+~~-~~-----4---+---~-~~-~--~---~---~r; --:--..:...;.. ,__ . .. . ' .. . t ~· . . •. . • . . ---. . . . . --~·~ ·-· ··~ .... ~l. ···~ I"'• ~--. ... • I • : .· I 1 J -·-!.. !---:.-• • '" • • '' ••w ·•• ••· ----•" •·•· ---··----·---· . ~=~.:::: ::::: ~~;i :=; . .J:--· ·=:: ::_ . . ~·~ :·: : ~ .. ·:~: .· . . I . . . . =-~.:;;;-_: f==...:..:..:. ----=;· ... -:" +---·----f..!.. -:.... . . . . ••. 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' l · ', :· f ! I ' ~ :=:: -~ ;.. • • · ..... il • • • • ~ ., . . : • • . : • • . i ! I I ' I I I .. :. ... ... l . . . t : •· • ~ • ~ .• t . I i ~. . . ,; ~ I J: ~ t·---·· . · ~:. ··· :~: :::. :·i . . . i·~-l· · i ·· :::-~r· ·I I . J JJ · I .. ··: · i ·· J jJ a ' J a 1 1 (iO J 4 1 6 It l I J 4 $ 6 J I tl l . l ' 6 I I •1 ~ ;o,coo roopoo SEDIMENT DISCHARGE lf.l TONS/OAV I I I I I I I I I I I I I I •• I I I I 0'1 n.• ,.. ·7 cf w a: cf z II) cf m ..J n ;:! O'l 0 ~ o• ... • n 0. 41{ n ...., a: "" (l ...J ... , ... " ~ 1'14 m n ' t• '1 l . .. 0 ' . ,/ . ~ I .! :. -I I I i -· .. . '· . ·i r I i I . ... .. . . . . . I • j I r i i ! I l I :·. .. , ·I . l I . . ...... i .. t·· ' . I ! I . . I . . . ... ... . . . . . . . • ,. ... It .. -1 • . . .. . .. .. . . .. . . .. .. . '' . . I ~d: . . 1 . . . .. . .. _i I • I I i I I J~~~~ I l , ~~ SUSlTHA JIIIV[Jii HEAR DENALI I V-1 . ! .. I I I 1 . . t ' I I ' t I 1=1 __ "1 ... . l· ~ • f v ... . . I MACLlREH NEAR PAXSON . • v . I . • ' I .I ' I . ! ' . ! . ! ; < v ., ' ,, . I l ! I ! 1.1' . l ~ l I . . 1• I I A . • ! i 1 ' ; 1 L • I ' l • / . I : u I ) ~ I I i I [ ' .. . . . :~tfNA-RWSHiE-AR-C-AN~-WEl:!. ... ,., I I / • l I . . 9 I I i i . ~ I .. . ' f ..... . ~ ... I I I .. Jl ' ~USlJlfAJU.V. .R..Al._GQI n ~ FK t . l I I ~ " ... .. .. " .. , ....... I ~--' . -..... -. ... --..... .,;. * .. --· .... ·-\lo ~ ''*'" . ~ ~ . I FIGURE 4.10 I. I TOTAL SEDIMENT RATING CURVE FOR SUSITNA I BASIN ABOVE GOLD CREEK GAGE . . I . . . ·I . ·• , .... (Source: Ref. 7, 8) I . 1000 ~ '000 TOTAL SEOUJENT OtSCHARG£ T07'!S fXIt' CUSIC t-iJLE 4-28 I I I I I I I I I I I .· . I I I, I. I I I I 5 -HYDROLOGIC DATA FOR ALTERNATIVE HYDRO SITES 5.1 -Introduction As part of the engineering studies conducted during 1980, preliminary informa- tion on capita 1 cost and energy potentia 1 were developed for ten alternative hydroelectric development sites (see Figure 2.3) ·within the Railbelt but outside the upper Susitna basin. This seetion briefly outlines the studies undertaken to generate sufficient hydro 1 ogi cal information at these sites and summarizes the results. 5.2 -Streamflow Data (a) USGS Records for All Sites The USGS currently operates 39 stream gages in the Railbelt Region. In addition, there are at least 35 stream gages which monitored streamflow within the Railbelt but have been discontinued or converted to partial record stations. /.\mong the base stations used to provide streamflow data for the ten sites in the Railbelt area, the station on the Nenana River (No. 5160) (see Figure 2.1) has continuous streamflow records for 23 years, from October 1950 to September 1973, and was subsequently converted into a partial records station. The station on Snow River has only four months of record and is not currently operated. Records at other stations vary in length between these two extremes. Over 13 years of records are available on Klutina River and for Chakachamna and Strandline Lakes, but observations were discontinued after 1972. USGS field activities have included discharge and/or stage measurements at the stream gages. (b) Streamflow Analyses The inflows used as input into the Acres reservoir operat.i on studies were determined based on a streamflow a.na lysis at eight gaging stati ens within the Railbelt. Fortunately, most of the stream gaging activity has taken place nearest to areas of human activity which until recently has been predominantly in the South-Central province, including the Railbelt. The existing data base used to estimate the input into the reservoir operation studies is presented in Table 5.1. The first six gaging stations shown on Table 5.1 represent the. best data for estimating the. inflows to the reservoirs. Some periods of records were considered too short to be used in reservoir operation studies. For these cases, annual and monthly streamflows were transposed from stations located on the same river or hydrologically similar stations loated on adjacent rivers, using monthly and seasonal correlations of streamflows and/or ratios of intervening drainage areas. The hydrologic criteria for selecting similar stations included the prox·imity of the watersheds, the orientation of the drainage basin and the direction of the main water course, special features of the runoff such as glaciers and/or lakes and, whenever possible~ the size of the drainage area. Homer on Bradley River and Lawing on Trai 1 River were selected to extend the information at the Lawing Station on Wolverine Creek and the Seward Station on Snow River·, respectively. The procedures used in extending the information at the base 5-1 stations are presented on Table 5.2. After expansion and/or o transposition of data, the length of the streamflo\'1 data used as input the reservoir operations varied between 13 and 27 years. Monthly streamflow data is shown in Appendix F for the ten selected sites. 5-2 into " I I I I I I •• ' . I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I USGS No. 2927 5160 2060 2945 2369 2439 2390 2480 TABLE 5.1: Gaging Station River Talkeetna Talkeetna Windy Nenana Copper Center Klutina Tyonek Chakachatna Lawing Wolverine Creek Seward Snow Homer Bradley Lawing Trail STREA~1FLOW DATA BASE Drainage Period of Record Aria Fran To Mean Ann~al (mi ) mo/yr mo/yr F'" low { ft /s) 2,006 06/64 09/78 4,000 710 10/51 09/73 1,204 880 08/49 06/67 1,686 1,120 06/59 09/72 3,506 10 10/66 09/78 87 128 09/70 09/70 1,360 08/74 09/74 08/77 08/77 54 10/57 " 09/78 418 181 05/47 09/74 780 5-3 01 I ~ -- TABLE 5.2: Gf..NERATION OF STREAMFLOW DAlA BASE FOR PROJECl SITES Project Site Drainage Dam Site/Rivet· Basin Are<: (mi 2 ) SnovJ/Snow 85 Bruskasna/Nenana 653 Ketna/I alkeetna 1,250 Cache/Talkeetna 750 Browne/Nenana 2,450 l alkeetna/1 alkeetna 850 Hicks/Matanuska (3) 950 Chakachamna/ Chakachatna 1,120 Allison/Allison Creek (3) 6 Strandline/Bet~ga (3) 54 Notes: O.A* = Drainage Area (1) Correlation Coefficient = 0.55 (2) Correlation Coefficient == 0~90 USGS No. Station/River 2439 Seward/Snow 5160 W~ndy/Nenana 2927 lalkeetna/Talkeetna 2927 l a lkeetna/T alkeetna 5160 Windy/Nena.'la 2927 Talkeetna/Talkeetna 2060 Copper Creek/Klutina 2945 Tyonek/Chakachatna 2J69 Lawing/~lo l ve dne 2945 lyonek/Chakachatna (3) Streamflow generat1on based on Adjacent River Gaging Station •. - Streamflow Data Drainage General Basin Area Procedure (mi 2) 128 Correlation of ra~e 2439 on 2480 1 D.A. Ratio = 0.66 710 D.A. Ratio = 0.92 2,006 D.A. Ratio = 0.63 2,006 D.A. Ratio= 0.37 710 D.A. Ratio = 3.45 2,006 D.A. Ratio = 0.42 ~ 880 D.A. Ratio = 1.08 1 '120 D. A. Ratio = 1.00 10 Correlation of ~aJe 2369 on 2390 2 O.A. Ratio = 0.60 1 J 120 D.A. Ratio = 0.05 G:r.....-. ... -- l citai~Period of Generated Recot·d (yeat·s) 27 23 14 '14 23 14 17 13 ., s 13 - I I I I I I I. I I I I I I I I I I I I 6 ~ CLIMATIC DATA 6.1 -Climatic Data Climatic data, including temperature, precipitation~ wind, cloud cover, humidity, etc. has been collected by NOAA and others at a number of stations w·ithin and adjacent to the Susitna River Basin. The location of the stations and length of records available are presented in Appendix G. Typically, NOAA records are presented as annual summaries with comparative data for each station (see Table 6.1). Monthly summaries of the same are also available for most of the parameters presented in the annual summary on a daily basis with selected par~meters presented on a 3-hour or hourly interval. A summary of the available c1imatologica1 data for the basin is presented in Table 6.2. 6. 2 - E vapor at i on Data. The closest stations to the Upper Susitna Basin where Pan evaporation data is collected are at the Matanuska Valley Agricultural Experiment Station near Palmer and at the University Experiment Station near Fairbanks .. The period of record for each station is for the summer months in 1944 to the present with several gaps in records. A summary of the monthly averages is presented in Table 6.3. 6.3 -Snow Survey The SCS performs regular snow course surveys and collect snow depth and water equ~valent data at a number pf locations within and surrounding the basin. Usually one measurement a month is taken at each site during the winter months, February through May. Appendix H lists the stations and period of records avai 1 ab 1 e. 6 1 -. - 0'1 N ---------- TABLE 6.1: TYPICAL NOAA CLIMATE DATA RECORD ------------------------------------------------------------------------------------(SOURCE: REFERENCE 14) Meteorological Data For The Current Year StatiO<\, SUI! I' l T 1 ALASKA 1 264H SUKI!.ll AIRPORT Sllnd11d litM utcd: J.LASit.lN Lamudl. 6~ • 20 • H long•uule: H9 ~ 01 • W Elevation (!Jloundl: 2391 lttl Year: 1~17f! ~ ~ T etnpjlfiiUIW • F Precipitation In lnchn Reli$1VI Wind t Number of days t:r....,. OegtL<a da~ humldib'. P::l. i ''llltlilion Bo• ss•f Fas!orn mile .. .: l: Temperature • F 'l!l~ ... Avarogon EXVCIMI Wour equivalent snow, I« p.IIU1 Resullanl :;; Suruisa lo SUllMOI '11\b l % j & l li I! =· ~ Ma1:.imum Minimum l ~~ .!!lS E ij Month X :X -=: &~ lbl ~ Sf .£ ~ E E § ~ ~! ~lS uo t: io .,. ~·~ ,. 1 1 ~ .. 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UP· 49.11 31.1 o\0.1 ,, 1'-16 30 111 0 1.59 o.~oe 9 o.~ 0,) 20 76 u 2~ 19 1.6 ) 9 u ll G 0 ~ 0 0 1l a. r· Qtl 20 01 u ) ,, YtAtt. l . !; ' I I Normals, Means, And Extremes -niROUGH 19751 J 1,9 " \},5 tl 19.4 " 32,9 ft 4h1 J u.o J t.O,;t • ''·0 s 47,1 0 ,.,.,, tl U.1 " 9.2 ··hll 4 ... loO H•l 29·1 )9.9 4),& "'·' lZ•6 n., 3·7 _,,,. 1.6 6.11 11.2 _2).5 n., ,,,o sz.o ''·" 39,9 24,0 9.l 2.9 4' 1971 19t.5 45 19~'7 1U5 •15 U11 16bl 30 19V. UU H 1945 Ub u 1941 <\10 n l<no ~ol 20 '''' 'oa 29 l9lol 16, itl ll'bl ltU All 0 0.91 ll I.23 0 l.O~ 0 0.67 0 0.11 0 2.11 0 1.(19 o l.Jo 0 z.u 0 1.62 0 ~-21 o 1.2o u l.Ja t•He 4.31 9.H 4.53 h6 ~.45 i66 Z.6c. 966 .. ,,, 91,9 h!le 95'3 6.93 ,,s 6.13 l':Mi ).7'1 952 4.CS t9'2 oll.li~ 1951 0,09 ,,.~, T lt'o 0,01 ltf.tl o.o6 l?lt" o.o4 to\9 0,41 19,1,2 1.17 ,., o.u he>1 0,06 lUi 0,24 19~5 fB ,, 5 7 7 6 . ' 64,1 1900 16.3 1973]&1 6& 69 68 lJ.l HE ~4~!1 1931 21.0 tt64 lb 15 75 76 11.9 HE 59~1 1946 11~1 1946 76 16 70 73 11;1 HE tl~7 191o t.l 1963 ao l5 65 75 7.6 HE 17.4 19~· 1.5 1946 ~) 70 ,. 67 7~7 v •·~ 1974 1.1 ~t14 •~ 73 ,, 65 a.l sw ,,, t97G ,,7 197o •• .,, at 12 1.a s~ toO 1U5 fi,O U!IS U 11 62 7' 7.o\ S.lll zt.s 19!14 l~t.o 1~'' as &1 '' 7' 7~S HE J4~1 1970 12,6 1970 IJ 15 76 11 1.0 HE 15.1 1967 21.9 itlg 19 19 71 79 11~1 HE '0.1 ltln 27.4 1•1o lb 11 76 11 tz~l HE HOV Fll , 7 '"' 05 1961 lt6 07 1914 411 10 1971 33 o& \971 u 01 1969 2.9 21 1910 30 21 l9H "Jl 2Z 197! n u uu u n 1no 39 25 1910 ~ ... 11 1910 7 1 7 1 20 • 5.2 u 7.0 ,. 6.2 9 1.2 ' .,,, 1 ··2 z ' ll 9 4 ' 17 10 ' 6 16 10 ' ., 11 1 ~ 9 19 1 2 6 22 u 1 s,z 2 1 zi 16 • II.) 2 6 23 11 0 '·"' ' ' 20 16 2 T.t. 5 5 21 ll 7 7.1 7 4 19 9 ' 6.5 9 ' 1'1 11 6 •• 34 )~ :H ~'! l H • 0 )0 )l &•;I '921,4 1 o za za l.~t ~11.1 1 o 17 ll t"'-'' '917.z 1 a u JO :tl' '922.9 1 4 1 Z2 '")' "JU.\ 1 1 0 2 II:• ', OJJz. ... 7 1 ' 0 .. ~~ ;92'i.1 1 l 0 z ll'll '9'30.1 1 • l H lt~) '9l.t,,1 2 0 u )0 <:1:! "116,7 l 0 27 JO .t.r! '1iU•l 1 o 10 n t"ll ~14.7 va. n.o ~l; ~':~~ ~~n U 1971 p41U o lzo.ot. !AUG 6.'7" J1944 g:~~ ~'::! T 'ISO 15.1 1967 za.o tt64 •1 7~> 67 ,., 9~7 HE "''" 41 10 1971 ' jl ll u 9 111 2!11 att-:j ~u.o (~) length of record, years, through the current ~ear unless otherwise noted, band 011 January d&tl, (b) 70 4 1nd above at Alaskan sbtlons. • len than Oflt h1lf. T Trace. IIORIIAI.S • Bued nn rttCird for the 194\~l!.l;iO period, DAlE OF All UlR£1'\t -The mast reeent fff cases Clf"''ll..ltl!lla occurrtllce. Pl:f:VAIUHG IIIHD (llAECTtOII • Record thro~~ l96l, WIHO OIR£Cl1011 • l1110en)s Indicate tens of dtgrtes clockwise froa~ true north. 1)0 Indicates uta. FMl£ST flllE '111110 • $pe~ Is fa~test ob~ervtd 1-atnute value 11litl1 !J>t dlrtctfon u. tn t.r.ts of deqrns. Due; to leas than !uU time operation on a variable ac~edute, !Un\Uilly recorded elc!laents An".!> from broken sequence~ tn incomplete record~. Dally temperature extremes and preclplt6tLarr, totala fo~: fOrtl.<ins of the ncord Ny be ,for other than a calendar day. The t>erlod of tttlllrd for acme elements ie for other than cona~cutive years, ~ For calendar day t>rlor to 1968. @ Far the period .1950""19!14 and Janll&r)' 1968 to date \~hen available for full year, For the -pedod 194'l-19Sl and January 1968 to date wen available for full year. I Dat~ (or thb atation r.oc: available for archiving. flllr - w,.·.;, !': ·•, .. '·-~,·K"'..i ·o>, · . • •• ·~· • • ., • • <' ~( J • uf<l{;: t•~(}t/j , • • .. • ., ~ • -~ · o .. · • · , ~ .:\ "'o • • • • : • • • • ~ • -•• ; {1 • ~·~~fti • ' ... r-~. ' ~~.. .r:::• ' \. ~ (; # • • • • 4 • ~ .• ·~ ~ .. ••• i'i • • ~., .J • • .. • • • • 0'\ I w Station Matanuska Valley Agriculture Exp. Talkeetna Summit Sheep Mountain McKinley Park Gulkana Station Matanuska Valley Agriculture Exp. Talkeetna Summit Sheep Mountain HcKinley Pad, Gulkana Jan. Stn. .90 1. 76 .aa .55 .83 .68 Jan. Stn. 12.1 9.4 2. 1 5.1 1. 4 -1 .. 3 -·-•. --- feb. .73 1.72 1. 31 .68 .69 .47 feb. 18.8 15.5 7.5 9.5 7.1 z. a TABLE 6.2: BASIN CLIMATOLOGICAL DATA (Source: Ref. 5, 6) MEAN MONTHLY PRECIPifATION (IN) f.lar. Apr. May JIJne July Aug. .43 • 39 .. 74 1.30 2.24 2.90 1.46 • 75 1.34 1. 77 3.19 5.33 1. 21 .73 .81 2.24 3.15 3.27 .62 .72 .56 1.97 2.43 1 .. 24 .37 .47 .68 1. 93 2 .. 59 2. 61 .36 .22 .60 1.40 1.92 1.58 MEAN HONTHLY TEMPERATURE -0 f Mar. Apr. May_ June July Auq. 24.6 37.1 47.2 55.4 57.7 55.4 20.3 33. a 44.8 5~·.1 57.9 54. 7 11.3 23.3 36.9 48.6 52.2 48.5 15.7 27.8 41.0 53.3 52£9 51.0 13.2 28.4 41.5 52.2 54 .. 6 50.4 14.5 29.5 43.1 53.3 56.6 52.5 --·-·· Sept. Octo Nov. Dec. Avg. 2.39 1.59 1. 01 .92 15.54 4.46 2. as 1e 79 1.62 23.02 2.90 1.72 1. 37 1.34 20.93 1.41 1.13 .71 .56 12.50 1.54 .98 • 7~ .65 14.29 1. 85 .79 .60 .72 11.19- Sept. Oct .• Nov. Dec. Avg. 47.7 3~.6 21.9 13.Z 35.6 46.0 33.1 18.8 9.6 33.3 40.3 24.4 9.4 2. 9 25.6 42.4 28.0 12.7 5.1 20.8 41.3 25.9 10.4 2.1 27.4 43.4 27.7 6.8 -3.1 26.6 ' I I I I I I I I I I I I I I I I I • Month May June July August September SUBTOTAL Month May June July August September TOTAL ·-.. TABLE 6.3: PAN EVAPORATION DATA (Source: Ref. 5, 6) Average Monthly Pan Evapor~ion, Inches . Matanuska Valley Exo. I Station Stn. Agr. Evap .. Yrs. Red. University Exp .. Evao. Yrs. nca. 4.63 15 4.58 24 4.09 e 29 2.99 29 1.83 26 18.12 Average Consumptive Use 6-4 4 .. 46 19 5.09 26 4.50 30 2.96 30 1.42 24 18.43 Consumptive Use (in) 2. 30 3.50 3 .. 86 3.08 0.16 12.90 I I I I I I I I .I •• I I I I • I I I I BIBLIOGRAPHY 1. Acres American Incorporated, Susitna Hydroelectric Project -Plan of Study~ February, 1980 .. 2. H.J. Kaiser & Company, Reassessment Report on Upper Susitna River Hydroelectric Development for the.State of Alaska, September, 1974. 3. R&M Consultants/Acres, Field Data Index, updated every six months, January, 1981. 4. u.s. Department of the Army, Corps of Engineers, Harbors and Rivers in Alaska -Survey Report, Cook Inlet and Tributaries (Report No. 2), Copper River and Gulf Coast (Report No. 3), Tanana River Basin (Report No. 4), and Yukon and Kuskoknim River Basins {Report No. 7), 1950-51. 5. u.s. Department of the A.rllrf, Corps of Engineers (Alaska District), Hydroelectric Power and Related Purposes: Sout_hcentral Railbelt Area, Alaska, Upper Susitna River Basin -Interim Feasibility Report, Anchorage, Alaska, 1975. - 6. u.s. Department of the Army, Corps of Engineers (Alaska District), Hydroelectric Power and Related Purposes: Southcentral Railbelt Area, Alaska, Upper Susitna River Basin-Supplementary Feasibility Report, Anchorage, Alaska, 1979 • 7.. Ue S. Department of the Army, Corps of Engineers, National Hydroe1.ectri G_ Power . Resources Study: Pre 1 imi nary Inventory of Hydrqpower Resources, .. Pacific Northwest, July 1979. 8. U~S. Department of the Interiors Bm~·eau of Reclamation (Alaska District), Distric-: Manager's Recnnnaissance Report of August, ~952 on Susitna R·iver_ Basin: A Report on the Potential~Development of Water Resources in the §usitna River Basin of Alaska, 1952. 9. u.s. Department af the Interior, Bureau of Reclamation (Alaska District), Devil Canyon Project, Alaska: Report of the Commissioner of Reclamation and Supporting Reports, 1960. 10. u.s. Department of the Interior, Alaska Power Administration, Devil's Canl_9n Status Report, Juneau, Alaska, May, 1974. 11., U.S. Department of the Interior, Alaska Power Administration, Inventor,x _ Type Calculations for Some Potential Hydroelectric Projects in Alaska, 1979. 12 .. u.s. Federal Power Commission, The 1976 Alaska Power Sur"vey, Vol. 1 and Vol. 2, 1976. 13. u.s., Geological Survey, Scully, O.R .. , Surface Water Records for ~ook Inlet ~asin, Alaska, (through September 1976). BIBLIOGRAPHY (Continued) 14. u.s. Geological Survey, Water Resources Data for Alaska Water Year 1977, - 1977. 15. u.s. Geological Survey, Larrke, R.D., Flood Characteristics of Alaskan Streams, 1979. 16. u.·s. Geological Survey, Water Resources (Surface and Subsurface) of Cook Inlet Basin-Rough Final Draft, February, 1980. I I I '.I· I ,. I I I I •• I I I I I I •••• ' I I I I I I I I I I I I I I I I I I .I' I APPENDIX A STREAMFLOW GAGING STATIONS IN THE SUSITNA BASIN (3) I I I I I I I I I I I I I I I I I I I 0100 WATER RESOURCES DATA COLLECTED IN THE SUSITNA RIVER BASIN STREAMFLOW CONT'JNUOUS GAGING Mean daily discharge and/or annual maximum flood peak discharge data have been collected by the U.S. Geological Survey & R&M Consultants at several locations within the Susitna River Basin. The stations for which this information is available and the period of record at . each location are listed beiow. Unless indicated by agency name in parentheses foflawing the period of record 1 all data has been collected by the USGS. All data listed in this section are on file at R&M Consultants according to index nurnbe.r and name. lndex No. Description 0110 Susitna River near Denali -USGS Station 15291000 Mean Daily Discharge Records: May 1957 -September 1966; JuJy 1968 -Present Annual Maximum Discharge Records: 1957-1966, 1968-1980 Annual Instantaneous Peak Flow:1957-1963, 1965, . 1967, 1967-1979 0115 Maclaren River near Paxson -USGS Station 15291200 Mean Daily Discharge Records: June 1958 -Present AnnuaJ Maximum Discharge Records: 1958-1980 Annual Instantaneous Peak Flow: 1958 .. 1980 . . ,. Index No. 0'120 0130 0140 Description Susitna River near Cantwell -USGS Station 15291500 Mean Daily Discharge Record: May 1961 -September 1972; May 1980 -Present Annual Maximum Discharge Records: 1961-1972 Annual lnstantaneous Peak Flow: 1960-1972 Susitna River near Watana Damsite -R&M SG-1 Mean Daily Discharga Records: July 1980 -Present Miscellaneous Discharge Measurements: 1980: August 20 ( R&M) _ August 2.1 (R&M) September 3 (R&M) September 18 ( R&M) October 20 (R&M) Susitna River near Gold Creek -USGS Station 15292000 Mean Daiiy Discharge Record: August 1949 -Present Annual Maximum Discharge Record: 1950-1980 Annual Instantaneous Peak F1ow:1950-1980 0145 Chulitna River near Talkeetna -USGS Station 15292400 Mean Oa.ily Discharge Record: February 1958 - September 1972 Continuous Stage Gage Reactivated: Mav 1980 Annual Maximum Discharge Record: 1958-1972 Crest Stage Record: 1973-1977 Annual Instantaneous Peak Flow: 1953-1977 •• • I I •• I· I I I .I I I I I I I I ~ I I I I I I I I I I I I I I I I I -· I Index No. 0155 0160 0162 0163 0165 0175 0190 .Description Talkeetna River near Talkeetna -USGS Station 15292700 Mean Daily Discharge Record: June 1964 -Present Annual Maximum Discharge Record: 1964-1980 Annual Instantaneous Peak Flow: 1964-1980 Susitna River near Sunshine -Proposed 1981 Willow Creek near Willow -USGS Station 15294?05 Mean Daily Discharge Record: June 1978 -Present Annual Maximum Discharge Record: 1978-1980 Deception) Creek near Willow -USGS Station 15294010 Mean Daily Discharge Record: May 1978 -Present Annual Maximum Discharge Record: 1978 ... 1980 Skwentna River near Skwentna -USGS Station 15294300 Mean Daily Discharge Record: August 1959 -Present Annual Maximum Discharge Record: 1959-1980 Annual instantaneous Peak Flow: 1959•1980 Yentna River near Susitna Station Mean Daily Discharge Record: October 1980 -Present Susitna River r~ear Susitna Station - USGS Station 15294350 Mean Daily Discharge Record: October 1974 -Present Annual Maximum Discharge Record: 19/4-1980 0200 STREAMFLOW PARTIAL RECORDS All data collected relating to river stage or water discharge for the Susitna River Basin not previously listed under Section 0100: Str·eamffow Continuous Gaging are included below. This section includes all records from crest stage gages, staff gages or fragmentary data. Agencies collecting the da-t:~ include: U.S. Geological Survey (USGS), R&M Consultants (R&M) and National Weather Service ( NWS). The agency responsible for data collection at each site is indicated by the agency name in parentheses following the period of record. It should be noted that National Weather Service stations provide real-time :-iver stage data which can be obtained from the NWS Alaska River Forecast Center .::~ any tir ~. \ Aiaska Department of Fish and Game "~as add~ticnal data on stage and water discharg.e of selected tributa..-ies and fresh-water sloughs in the Susitna River Basin. Appendix I incftudes location and period of record :or the data avai I able. All data given below are on file at R&M Consultants according to index number and location, un!fess marked by an c;sterisk following the R,el"iod of record. Index No. 0201 Description Raft Creek near Denali -USGS Station 15291000 Annual Maximum Discharge from Crest-Stage Gage: 1963-1977 (USGS) 0205 Susitna River at Deadman C.: >k -R&M CSR ... g Crest-Stage G~-ge .. 1980 (R&M) I I I I I I ·I I I I li 1: I I' I' I I I I I I I I I I I I I I I I I I I I I I I Index No. 0210 0215 0220 0225 0230 0235 0240 0245 0246 Description Susitna River at Watana Dam Site R&M CSR-8 Crest Stage Gage: 1980 (R&M) Susitna River above Devil Canyon -R&M CSR-7 Crest-Stage Gage; 1980 (R&M) Staff Gage: Proposed Portage Creek above Gold Creek -R&M CSR-6 Crest-Stage Gage: 1980 (R&M) Susitna River at Sherman -R&M CSR-5 Crest-Stage Gage: 1980 ( R&M) Susitna River at Section 25 -R&M CSR-4 Crest-Stage Gage: 1980 ( R&M) " Susitna River at Curry -R&M CSR-3 Crest-Stage Gage: 1980 (R&M) Partial Discharge Record: 1948 .... 2 dates (USGS) Susitna River near Chase -R&M CSR-2 Crest-Stage Gage: 1980 (R&M) Susitna River above Susitna-Chulitna Confruence - R&M CSR-1 Cres ... ·~tage Gage: 1980 (R&M) Talkeetna River near Talkeetna Partial Discharge Record: 1949 -2 '""ates (USGS) Index No. 0247 0250 0251 0252 0253 0254 0255 0256 0257 Description Talkeetna River at Talkeetna Rail road Bridge Partial Stage Record: 1976-1980 (NWS) Susitna Rh!~r' at Sunshine -USGS Station 15292780 Partial Discharge Record: 1969-1971, 1976-80 (NWS) Montana Creek near Montana -USGS Station 15292800 Crest-Stage Gage: 1963-1972 (USGS) Montana Creek at Parks Highway Parti.;:-.d Stage Record: 1973-1980 (NWS) Gt.,ose Creek near Montana -USGS Station 15292900 Crest-Stage Gage: 1963-1971 (USGS) ' Caswell Creek near Caswell -USGS Station 15293000 Crest-Stage Gage: 1963-1980 (USGS) • Little Willow Creek near Kashwitna - USGS Station 15293700 Low-Flow Discharge Record: 1978 (USGS) Willow Creelt at Hatcher Pass Road near VJillow - USGS Station 15294002 Low-Flow Discharge Record: 1978-1980 (USGS) Deception Creek above Tributary near Houston - USGS Station 15294007 Low-Flow Discharge Record: 1978-1980 (USGS) I I I I I I I I I I I I I I I I I I I ~. I I I I I I I I I I I I I I I ~. I I Index No. 0258 0259 Description Deception Creek Tributary near Houston - USGS Station 15294008 Low-Flow Discharge Record~ 1978-1980 (USGS) Willow Creek at Parks H.ighway near Willow Low-Flow Discharge Rec,ord: 1978-1980 (USGS) Partiar Stage Record.: 1973-1980 (NWS) I I I I I I I I I •• I I I I I I I I' I APPENDIX B MEMO ON PROBABLE MAXIMUM PRECIPITATION ESTIMATES FROM NATIONAL WEATHER SERVICE TO CORPS OF ENGINEERS -UNDATED .. .• - 1 I I I I I I i .. DRf.FI' -- ~rr. Vernon K. Hagen Office of Chief ~£ Engineers Corps of Engineers Forrestal Bldg., Rm.·S-F-039 't-Tashington, D. C. 20314 John T. Riedel C"nief, Hydromete.orological ~£\ranch " Tentative E:rl:imates of Probable 1-!a:d.mum Preeipitation (PHP) and Snowmelt Criteria for Fou:t" Susitna River Drainages Introduction ? The Offi_ce of Chief of Engineers, Corps of Engineers "requested 1?!1P and sr1owroelt crit-eria for the subject drainages in a memorandum to the Hydrometeorol;:>gieal Branch, dated December 12, 1974. The: Alaska District: r~quested the study be completed by Februa.-y 1, 1975; however, a more -realistic date f1J:r eompleting a study in "nnich we ha~le confid';.~ce is June 1, 1975. Because of the need t:o soon begin hydrologic studies bas?.d on metelorological criteria!t the Branch has concentrated on the problem and has deterc.ined the general level of criteria. A 1:'ange of P}tp values ar~ g:LverL in this memorandum within which -we believe values from I a more compr{ahensive study will :fall. The sequences of snomne!t tvinds, 't:e:nperatures :1 and deVT points should be checked with additiona~ studies. I In addition, if vTe knew in detail how snox"7-!elt will be computed·' we could I give~ emphasis to the more ~tmportant elements o I FHP es tinates _Eor four dra:lnages A range of est.;imates of P}!P for 6, 24, and 72 hou~s for four . I dralnages outlined on t7te map accompanying the December 12, 1974 I!!emornndutil are listed in .table 1.. These are numbered fror.1 1 to 4 (smallest to largest) .. I I J I . ; r 1 . / ~ . ~ : I . -2-I ! I The estimates are for the months of August a=C Saptembe~ -the s~ason of greatest rainfall potential. For the snc~~lt saason, multiply the estimates by 70 percent. I I Tde estimates take into account numerous co--s~arations including several methods of modifying PMP estimates made pre~~~ly for other Alaska drainages, and PMP estimates from the Weste=n ~~ited States for areas I uith similar terrain. I I I· I I ·~ I I I I I I I @ I I I I I I I I I I I I I I I I I . .. . .. , -3- f~mperatures and Dew Po~ts for Snowmelt A. During PMP Storm 1. Dew point for PMP centered on June 15 -56°F (assume maximum 1-day PHP in middle of 3-day storm)~ 2. For PMP placement: prior to June 15 s-~tract 0~8°F for each ;3-day period prior to June 15 (eog. the ~ de"* point for June 12 wil~ be 55.2°F). This -0.8°'F per 3-days may be applied to obtain the maximum 1-day dew point during the Pr·fP back t:.o as early as May 15. 3. For first day of PMP storm, subtract J. °F from criteria of ~ for 3rd day of PMP storm subtract 2°F. -4. Add 2°F to ~-L~~i. of the three dai~y c:.; points to get daily temperatures for the 3-day P~~ period. B. Temperatures and Dew Points Prior to 3-Day PMP Storm (High dew point case) Day prior to PMP 1st 2d 3rd 4th Adjustment to t~erature and dew point on day of ma%i&rm P~ ~perattt::'a C'F) -2 -1 0 +1 .. Dew point C'"F) -2 -4 -4 -5 . . Day prior to P~iP 1st 2d 3rd 4th -4- C. Temperatures, Dew Points Prior to 3-day PMP (High temperatu=e case) Adjustment of temperature and de~ point on day of maximU3 PHP Temperature c~F) +1 +2 +4 +1 Elevation Adjustment -12 9 7 6 For the 3 days of PNP and for the high del; point~. apply a -3°F per 1000 ft to the temperatures and dew points. The basic criteria a:re considered applicable to 1000 mb or zero elevation. For the lrl.gh temperature criteria apply a -4 ~~ per 1~100 ft increase in elevation. Half-dav Values If half-day values are desired for te~eratures and dew points, the following rules should be followed: 1. Fer the high-temperature sequence,. apply an l8°F· spread for o temperatures and.a 6GF spread fer de~ point. For example, for a mean daily dew point of 50°F, the half-day values w-oulC. be 47°F an.d 53°F. 2. For the high dew point case, apply a 12 °F spread for temperature and a 4°F spread for de":~ point. I I I I I I I I I I I I I I I I I I I I~ . I I I I I I I •• I I I I I I I I I I -:t- 3. In no case, however, should a 12-br de".; point be used that exceeds the 1-day value for that date. For exaln:pla, the value not to be exceeded · for June 15 is 56°F, for June 3 (four 3--ck.-y periods before June 15) is . . -6- Wind Criteria for Snowmelt Since two sets of c·ri teria (one emphasizing high temperature and the other high de~ point sequences) are given for snot~elt prior to PMP, two sets of wind criteria are also necessary since the pra-P~~ synoptic situati~n favoring high temperatv~es differs from the criteria favoring high dew points. The recommended winds, tables 2 and 3~ are given by elevation bands. In the high ~ew-point case, table 2~(where synoptic exist . cond:itionsl\favoring maritime influences prior to Pl!-lP), the same wind for 4-days prio-r to PNP is appropria~;. All of the vrlnds presented in tables 2 and 3 have been adjusted for applicability over a snow surface. Although a seasonal variation in the high de~y point wind criteria is recliistie for the pres~nt tentative crit=ria~ they are considered applicable to Hay and June. Sno'Wmelt Hinds During the.PMP \-lind criteria for the 3-day PMP are the same for both the high temperature and high dew point sequences. · They are shown in table 4. I I I I I I I :1 I I I •• I I •• I I I I ·~ . . . ~ ~ I I I I I I I I I I - I I I I I I I I .. -7- Snot~ Pack t~.vailable for Melt Some work was done in determining the mean and maximun October-April precipitation of record for the available ?recipitation stations. These stations and other data are tabulated in. table 5. The drainages and available stations are shown in figure 1. Table 5 also shows the years of record ava~Jahle for October-April precipitation, as well as a column labeled "synthetic October-April . precipitation. n This gives the sum of ti::e greatest October~ gr:ea~esf: November, etc., to the grsatest April pred?itation total from the available record. These syn~hetic October-April precipitation values and the means are plotted on figure 1. Approximately 9 years of snow course data a::-a available for 14 locations in and surrounding the Susitna drainage. ?roo these records, the greatest w~ter equiv.tlents Ye1:'e plotted on a map. T:::ese ~ied from a low of 6 inches at Oshet~a Lake (elevation 2950 £t:) to an extreme of 94.5 ·i·nches at Gulkana Glacier, station C (elevation 62-60 ft).. A smooth plot of all maxima against elevation gave a method of: deter:rlning depths at other elevations. Figure 2 shows resulting smootit vater equivalent;s based on smoothed elevation contours ·and this relation. Some additional guidance could be obtained f:~ mean annual precipitation maps. One such map available to us is in ;\O.AA Technical Hemorandum N\~S . AR-J.O, "Hean Monthly and Annual Precipitati.cm., Alaska. n The mean annual of this report covering the Susitna drainage is shown in figure 3. -8- Also on this figure is shown the mean runof.f for t:hree portions of the Susitna River drainage based on the years of record shov~. No adjustment has· been made for evapotranspir=:.tion or any other losses. This indicates th;·t the actual mean annual precipitation is probably greater than that given by Ni.fS AR-10 .. Conclusion. Time hasn't allowed checks~ e:-,a!uatiaa, and comparison of the several. types of data. summ.arj.zed here. It appears the! nsynthet;ic. October-April p-recipitat.ionn gene-rally is Less tJ:~!!ln the maximum dapths over the drainages based on sno~ course m.e.a.surements. There depths, or figure 2:t would be considered the least tha.t coti.k!. be available. for melt in the. s pri11g. J:urther·studies The variation of precipitation with terrai:::::::. featu:-as in Alaska is important but yet mostly unknown and unstudied. Hor~ ~ffor= should be placed on attempts to devei..op mean annual or mean seasonal ?recipitation maps; at: least for the region of the Susitna River~ So~e 10 years of data at about a dozen or so snow courses could be used in this attempt~ as well as s~ream runoff values. Some work has been done toward estimating :m~ depth-area-duration values in the Augtlst 1967 sto:rm; an importar:t input to the present estimates. Attempts should be made to car:ry out a complete Part I and Part II for this storm, although data are sparse and emphasizing the. use of streamflow as a data source. I I I I I I I I I I I I I I I •• I 'I I I ~ .. . . -9- 1 I The objective of these two studies ~th regard to the Susitna drainages I is to attempt a better evaluation of ~cpographic effects, and to ~ake a better evaluation of snow pack avai.1 a~le for 1:1.elt .. I Study of additional storms could give.~ important conclusions and· II guidance on how moisture is brought up tOe Cook-Inlet to the Talkeetna Mountains and how theoe mountains effec~ Lhe moisture. I -SnowAnelt criteria in this quick study is Jjaited to 7 days. Considerably I more· w·ork needs to be done to extend this to. a longer period. Then -we I would need to emphasize compatability of a large snow cover and high temperatures. More known periods of h-ig:ll snow""'t"..elt runoff need to he I studi.ed to determine the synoptic valt::es of the meteorologict;tl par~eters • •• 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 -10- 'rable ~ General l~vel of PMP.es~i~ates for 4 Susitna River d=ai~ages Drainage Area 72._hr PMP Number Qq mi) (in.) 1 1260 9-12 2 4140 7.5-10.5 3 5180 7~9 4 5810 7-9 For 24-hr PMP, multiply 72-hr value by 0.60. For 6-hr PMP, multiply 72-hr value by 0.30. PMP for intermediate durations may be obtained from a plotted smooth curve through the origin and the 3 valuas S?~cified. Table 2 SnOT~elt Winds preceding ~MP for Susitna Basins for high de'tol point: seqcence . Elev·ation Dai"Ty 1-i:i.:ld speed* (ft)_ (nroh) sfc 8 1000 9 2000 12 3000 13 4000 25 5000 34 6000 35 7000 37 8000 ~0 _.., 9000 ~0 10,000 42 *For each of the 4 days preceding .t~e ~-~;: ~ '!T\,!1) ,.., "-Uit -~ J; .. -• -11- Tabl.e 3 Sno~.rmelt winds preceding P!-P for Susi.tna Basins for high temperature sequence Dail7 'Oti:nd speed (mph) Elevation (ft) Dav nrior to 3-dav P~~ Elevation sfc 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000 sfc 1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000 (ft) .. 1st 2nd 3rd 4th 10 13 4 4 10 13 4 4 11 14 5 5 12 16 5 5 13 16 6 6 13 17 6 6 14 18 6 6 15 20 6 6 16 20 7 7 16 20 7 7 l7 21 7 1 Table 4 Winds during 3-day PMP Wind speed (mph) Day of Day of 2nd maximum P!-£? highest PMP 12 9 14 10 19 14 29 21 42 31 56 42 58 44 62 46 64 48 68 51 70 52 I I I I I I I I I I Day of 3ra I highest PMP a-I 9 . 12 •• 18 27 ••• 36 38 40 I 41 44 I 45 I ------- ----- ---·---r • ' , . Table 5 Stations l~ith Precipitation Records in and surrounding the Susitna Drainage Mean. Number Yrs of record for t1aximm11 of months for Synthetic ~> ~!~ complete Oct.-Apr. obs. Oct~ Yr of synthetic Oct.-Oct.-Apr. Oct~-Apr .. Station Elevation Ereci:eitation AEr• Ere c. Haximum ~Er• season __EreciE• ..L~~iE• (ft.) (in.) (in.) (itn ... ) Susitna Headows 750 4 17.18 70-71 4 23ol8 1:3..77 Gulkana 157"2 1a 6.77 56-57 18 12.68 /4,.19 Paxson 2697 2 8.42 43-44 6 14.25 7! .. 64 Trims Camp 2408 3 23.26 59-60 5 35.82 1$ ... 3 Summit 2401 19 14.09 51-52 20 26.59 'Zt .;93 Talkeetna :v.s 35 21,17 29-30 37 ItO I 59 1~~26 Sheep Hountnin 2316 13 11.91 "59-60 12 18.lt2 £4..,78 --.. ------.. e ------ (> 23 .. 1... C.:-~·.:. l,. 1\JA MeA Pc4US 4C-~ . l;l~ .5 l'3.,8 &At "'E;:, "J,.\ a..;~~ SuMN't ir 7.1 r------ , \. !./ r;7 Figure 1.--brainagc outlines and October-April precipitation in inches~ (Upper values = synthetic October-April precipitation• . , Lm-rer = mean October-April precipitation.) tS.4 4 .. 8 3 s.e · TRIN-tS ~""'P 1s.3 -• : • ' ..... ~ ••• :: •• ~~ J # • .... ... i. ~ .• ~. .. • ... 'I~~ ' l . -.. •. • I • JJ ~ • ·: • ~ • ';.•,;. o 0 • • : ~ '• 1· ,., •. • 1 ---.. -/ .. --· ·--Vj9 · ow;.7~ --~ 3o -J-__ ,_,_ __ -..._ to _,.. __ .........,_, __ ,_..._.... '\ ) ,_ -,-.._- \ ' " ....... -;--.) \ '\ \ I . ,1 ,_, . .· .. ·· .io i~e;ke: ---- F:I.gurc z.--Hin·tmum '\>Tnter equivalenta of snow pnck in inchea (baaed on gro£ts amootbinB of tnttx.intum snow course lll\Hluureme\lts.) .. ! ~ .. •. ------~.-- J.J.O +t.3 • - ·--;' Figure 3.--Hentl annual precipitation and stream runoff (in inches). - I I. I I I I I I I •• I 1: ~. I I I I I I • APPENDIX C SUSPENDED SEDIMENT GAGING STATIONS (3) 1 I I I ·I ·I I I I ~I .J :, :, :, I .I. :a :I ;I •• 0500 SEDIMENT DISCHARGE Suspended sediment concentration (mg/1) suspended sediment discharge (tons/day) and suspended sediment particle size analysis data have been collected by the U.S. s:;eological Survey (USGS) and R&M Consultants . ( R&M) at several sites within the Susitna River Basin. The locations where this information has been collected are listed below. All of the data, except 1980 data collected by the USGS, are on file at R&M Consultants. Unless indicated by agency name in parentheses following the period of record 1 aiJ data have been collected by the USGS. Index No. 0510 Description Susitna River near Denali -USGS Station 15291000 Sediment Concentration and Sediment Discharge: 1958-1979 1980: May 22 June 24 July 22 August 2 October 1 ,, Particle Size Analysis: 1958-1980 0515 Maclaren River near Paxson -USGS Station 15291200 Sediment Concentration and Sediment Discharge: 1958-1-968, 1974-1975 Particle Size AnaJysi.s: 1958-1967 1 1974-1975 Index No. 0520 0525 0540 0545 Descrip~t.;;.;;.i.;;.o.;..;n ___________ _ Susitna River near Cantwell -USGS Station 152.91500 Sediment Concentration and Sediment Discharge: 1962-1972 1980: September 5 (R&M) September 17 (R&M) October 17 (R&M) Particle Size Analysis: 1962-1972, 1980 Susitna River above Portage Creek near Gold Creek - USGS Station 624941149221500 Sediment Concentration and Sediment Discharge: 1977 Particle Size Analysis: 1977 Susitna River at Gold Creek -USGS Station 15292000 <· Sediment Concentration and Sediment Discharge: 1952-1957, 1962, 1967, 1974-1979 1980: May 14 August 19 October 7 October 16 (R&M) Particle Size Analysis: 1953, 1955-1957, 1962, 1974-1980 . Chulitna River near Talkeetna -USGS Station 15292400 Sediment Concentration and Sediment Discharge; 1967 -1972 1980: May 21 June 3 June 23 July 17 September 1 September 30 October 22 Particle Size Analysis: 1967-1972, 1980 I ,, ' I I I- I •• I I I I •• I' ' I I I I I I I I I I ' I I l I I I I I I I ..... I I Index No. 0555 0560 0561 0563 0565 Description Talkeetna River near Talkeetna -USGS Station 15292700 Sediment Concentratinn and Sediment Discharge: 1966-1979 1980: Februar·y 15 April 11 May 15 July 3 July 14 August 14 October 8 Particle Size Analysis: 1966-1980 Susitna River at Sunshine -USGS Station 15292780 Sediment Concentration and Sediment Discharge: 1971, 1977· Particle Size Analysis: 1971, 1977 Montana· Creek near Montana -USGS Station 15292800 Sediment Concentration and Sediment Discharge: 1970-1971, 1973 Particle Size Analysis: 1970·-1971, 1973 Deception Creek near Willow -USGS Station 15294010 Sediment Concentration and Sediment Discharge: 1978-1980 Skwentna River near Skwentna -USGS Station 15294300 Sediment Concentration and Sediment Discharge: 1967-1968, 1974-1975 ·1980: June 12 August 21 Particle Size AnaJysis: 1967-1968, 1974-1975, 1980 Index No. 0575 0590 . Description Yentna River near Susitna Station Sediment Concentration and Sediment Discharge: to begin 1981 Susitna River near Susitna Station - USGS Station .15294350 Sediment Concentration and Sediment Discharge: 1975 -1979 1980: February 12 March 12 June 16 July 30 October 10 Particle Size Analysis: 1975 ... 1980 I I I I ...... I I t I I I •••• . . I I ·- ' I ·I I ,, I I I- I ""r I I I I I I I I I. I I a I I APPENDIX D WATER QUALITY -STATIONS AND PARAMETERS (3) I I I ' I I .· I I I I I I t I I I I I ' I 0300 WA,TER QUALITY Water quality data· have been collected by the U .5. Geological Survey and R&M Consultants at several sites within the Susitna River Basin. The locations ·for which this information is available and the period of record at each site are given below. Since the measurements are onJy taken periodically the number of measure- ments, timing and specific parameters measured vary from year to year at any given static)n. A list of water quality parameters that have been measured by the USGS ~md R&M are included at the end of tni,s appe.ndtx. Unless indicated by the agency name in parentheses following the period of record, data have been collected by the USGS. Data collected by the Alaska Department of Fish & Game are all included in Appendix I. Therefore, they have not been listed again in this section. ·r·h • e data listed in this section are all on file at R&M Consultants according to index number and name, except where dates are marked by an asterisk. Most of the data are also available through the U.S. Geological Survey . . Index No. 0310 Description Susitna River near Denali -USGS Station 15291000· Period of Record: 1957-1961, 1968, 1976 0311 Raft Creek near Denali -USGS Station 15291100 Period of Record: 1972 Index No. 0313 0315 . 0318 0320 0330 0335 0339 Descri p1~ion Clearwater C:re~k near Paxson - USGS Station 630230146530000 Period of Record: 1958* Maclaren River na.~r Paxson -USGS Station 15291200 Period of Record: 1958-1961, · 1967-1968, 1975 Little Oshetna River near Eureka USGS StathJn 621130147391500 Period <:>f Record: 1953* Susitna Rivter near Cantwell ... USGS Station 15291500 Period of Record: 1967-1970 1980: June 19 August 8 September 5 September 17 October 17 (R&M) (R&M) (R&M) (R&M) (R&M) Susitna River near Watana Damsite -R&M WQ-1 Period of Record: October 1980 -Present (R&M) Susitna River above Portage Creek near Gold CrE:ek - USGS Station 624941149221500 Period of Record: 1977 Gold Creek at Gold Creek -USGS Stai;ion 624606149412500 Period of Record: 1977* ' ' . • • ... t • ··(\: .~ I I .. I ' I· I I I I I t I I I ,, I I I I I I I I ' I - I I I I· I I I I I I I I I I Index No. 0340 0345 0355 0360 0361.1 0361.2 0361.3 0361.4 Descr1 ption Susitna River at Gold Creek "" USGS Station 15292000 Period of Record: 1949-1958, 1967-1968, 1975, 1977 1980: May 2 August 8 · ( R&M) August 19 October 7 October 14. (R&M) Chulitna River near Talkeetna -USGS Station 15292400 Period of Record: 1958-1959, 1967-1968, 1970-. Talkeetna River near Tarkeetna -USGS Station 15292700 Period of Record: 1954, 1967-1980 Susitna River at Sunshine -USGS Station 15292780 Period of Record: 1975, 1977 Montana Creek near Montana -USGS Station 15292800 Period of Record: 1971-1972 Sheep Creek at Highway near Willow USGS Station 615945150024300 Period of Record: 1972 Caswell Creek near Caswell -USGS Station 15293000 Period of Recor·d: 1972 Kashwitna River near Willow - USGS Station 615535150041500 Period of Record: 1972- Index No. 0362.3 0362.4 0362 0362.1 0362.2 0363 0363.1 0363.2 0363.3. Description Willow Creek at Upper Bridge near Willow - USGS Station 614522149401700 Period of Record: 1972 Willow Creek at Hatcher Pass Road near Wiilow - USGS Station 15294002 Period of Record: 1978-1980 Willow Creek near Willow -US.GS Station 15294005 Period of Record: 1972 Willow Creek be!ow Canyon near Willow ... USGS Station 614607149552000 Period of Record: 1972 Willow Creek at Parks Highway near Willow Period of Record: 1972 Deception Creek near Willow -USGS Station 15294010 Period of Record: 1978-1980 Deception Creek at Mouth near Willow - USGS Station· 614552150021000 Period of Record: 1972 Deception Creek above Tributary near Houston - USGS Station 15294009 Period of Record: 1978-1980 Deception Cr·eek Tributary near Houston - USGS Station 15294008 Period of Record: 1978-1980 I ., I I I- I I I I I l i : ' I I I ' I I I I r , ,, ' I I ·I 'I IJ I I I I ll :, .I I •• i. I I Index ~No. 0365 0366 0390 -----------....;D_e_s.....,.~ription Skwentna River near Skwentna -USGS Station 15294300 Period of Record: 1959, 1961, 1967-1968 Yentna River near Skwentna - USGS Station 615815151070000 Period of Record: 1955* Susitna River at Susitna Station -USGS Station 15294350 Period of Record: 1955, 1970, 1975-1979 1980: February 12 March 12 June 16 July 30 October 10 0400 WATER TEMPERATURE Water temperature data have been collected by the U.S. Geplogicat Survey, R&M Consultants and Alaska Department of Fish and Game (ADF&G) at many locations within the Susitna River Basin. The locations for which this information is CJvailable and the period of record at each site are given below. Continuous water tempera- tur·e records are generally av_ailable for open-water months only, but the length cf record will vary for each site from year to year. Data collected by ADF&G have all been included in Appendix C. Therefore, they have not been listed again in this section. It should also be noted that instantaneous temperature measurements have been taken and may be found in the water quality records published by the USGS. ' Unless indicated by agency name in parentheses following the period of record, all data have been collected by the USGS. The data Hsted in this section are on file at R&M Consultants according to index number and name, except 1.980 data collected by the USGS and Talkeetna River data from· 1954. Index No. 0410 D~scription Sus,itna River near Denali _-USGS Station 15291000 Water Temperature Record: 1974 -1980 Temperaturl:: Cross Sections: 1980: May 22 June 24 July 22 'August 26 October 1 ·I· ~ ' ' ,. :1 -· I I. I I I I I •• I I ·I I I 1\ I I I .;.; I I I I I I I I I I I· I I ' I I· I I Index No. 0415 Description Maclaren River near Paxson -USGS Station 15291200 Miscellaneous Water Temperatures: 1980 0420 Susitna River near Cantwell -USGS Station 15291500 Water Temperature Record: May 1980 -Present 0430 Susitna River near Watana Damsite Water Temperature Record: October 1980 -Present (R&M) 0440 Susitna River at Gold Creek -USGS Station 15292000 Water Temperature Record: 1957, 1974-1980 Temperature Cross Sections: 1980: May 14 July 2 August 19 October 7 Miscellaneous Water Temperatures: 1980 (R&M) 0445 ChuJitna River near Talkeetna -USGS Station 15292400 Water Temperature Record: to begin 1981 Temperature Cross Sections: 1980: June 3 July 17 September 1 October 22 MisceJ laneous Water Temperatures: 1980 Index No. 0455 0460 0462 0463 0465 0475 0490 Descrif?tion Talkeetna River near Talkeetna -USGS Station 15292700 · Water Temperature Record: 1954 Temperature Cross Section: 1980: AprH 1 April 22 May 23 June 30 July 10 July 28 JuJy 29 September 9 October 15 Susitna River near s~nshine -USGS Station 15292780 ~V?ter Temperature Record: proposed 1981 Willow Creek near Willow -USGS Station 15294005 Water Temperature Record: 1978-1979 Deception Creek near Willow -USGS Station 15294010 ....._~ Water Temperature Record: 1978 -Present Skwentna River near Skwentna -USGS Station 15294300 Misceffaneous Water Temperatures: 1967-68, 1974-75 . Temperature Cross Sections:-1980: April 14 Yentna River near Susitna Station June 12 August 21 October 17 Water Temperature Record: to begin 1981 Susitna River at Susitna Station -USGS Station 15294350 Water Temperature Record: 1975 -Present I I 1-, ' I I I I I I I I I I ' I I I It I I I I I I I I •~ I I :.1 I I I I I I I WATER QUALITY PARAMETERS THAT HAVE BEEN SAMPLED BY THE USGS < WITHIN THE SUSITNA RIVER BASIN Site Parameters Available for each sample Date Time Instantaneous Stream Flow (cfs) Occasionally available for sample Sampling Depth (ft) Stream Width (ft) Percent of Total Depth Sample Location in Cross Section (ft from left bank) Physical Parameters Color (Platinum -Cobalt Units) Hardness (mg/1 as Caco 3 ) Hardness)' Noncarbonate (mg/l as Caco 3 .) Methylene Blue Active Substance pH Solids 1 Dissolved (tons/day, tons/ac-:ft) Solids, Dissolved Residue at 105°C (mg/1) Solids P Dissolved Residue at 180°C (mg/1) Solids, Suspended Residue at 180°C (mg/1) Specific Conductance (Micromhos/centimeter) Temperature, Instantaneous (°C) Turbidity (Jackson Turbidity Units) Inorganic Parameters AI kalinity {mg/1 as Caco 3 ) Aluminum, Total Recoverable (ug/1 as AI) Arsenic, Dissolved (ug/1 as As) Arsenic, Total (ug/1 as As) Arsenic, Total Suspended (ug/1 as As) Barium, Dissolved (ug/1 as Ba) Barium, Total Recoverable (ug/l as Ba) Beryllium, Dissolved (ug/l as Be) Bicarbonate (mg/1 as HC03 ) Boron, Dissolved (ug/1 as B) Cadmium 1 Dissolved (ug/1 as Cd) Cadmium, Total Recoverable (ug/1 as Cd) Calcium, Dissolved (mg/1 as Ca) Carbon Dioxide, Dissolved (mg/1 as co 2 ) Carbonate (mg/1 as co3 ) Chloride, Dissolved (mg/1 as Cl) Chromium, Dissolved (ug/1 as Cr) Chromium, Dissolved Hexavalent (ug/1 as Cr) ChromitJm, Suspended Recoverable (ug/1 as Cr) Chromium, Total Recover·able (ug/1 as Cr) Cobalt.~ Dissolved (ug/1 as Co) Copper, Dissolved (ug/J as Cu) Copper, Total Recoverable (ug/1 as Cu) Cyanide, Total (mg/1 as Cn) I I I I I I I I I I I I I I I I I I I ~ I I I I I I I I I ~ .; I •• . " .I} •• I I I I I I Fluoride, Dissolved (mg/1 as F) iron (ug/1 as Fe) Iron, Dissolved (ug/1 as Fe) I ron, Total Recoverable ( ug/1 as Fe) Lead, Dissolved ( ug/1 as Pb) Lead, Total Recoverable (ug/1 as Pb) Lithium, Dissolved (ug/1 as Li) Magnesium, Dissolved (mg/1 as Mg) Manganese (ug/1 as Mn) Manganese, Dissolved (ug/1 as Mn) Manganese, Total Recoverable (ug/1 as Mn) Mercury, o;ssolved (ug/1 as Hg) Mercury, Total Recoverable (ug/1 as Hg) Molybdenum, Dissolved ( ug/1 as Mo) Molybdenum, Total Recoverable (ug/i as Mo) NickaJ, Dissolved (ug/I as Ni) Nickel, Total Recoverable (ug/i as Ni) Nitrogen, Dissolved Ammonia (mg/! as N, mg/1 as NH 4 ) Nitrogen, Dissolved Nitrate (mg/1 as N, mg/1 as N0 3 ) Nitrogen, Dissolved Nitrate + Nitrite (mg/1 as N) Nitrogen, Nitrogen, Nitrogen, Nitrogen, Nitrogen, Totai Total Total Total Total (mg/1 as N0 3 ) Ammonia (mg/1 as N) Ammonia + Organic (mg/1 Nitrate (mg/1 as N, mg/l Nitrate + Nitrite (mg/1 as Nitrogen, Total Nitrite (mg/1 as N) Nitrogen, Total Organic (mg/1 as N) as N) as N03 ) N) Oxygen, Dissolved (mg/1, percent saturation) Phosphate, Dissolved Ortho (mg/1 as· PO 4 ) Phosphate, Total (mg/1 as PO 4 ) Phosphorus, Total (mg/1 as P) Phosphorus, Dissolved (mg/1 as P) Phosphorus, Dissolved Ortho (mg/t as P) Potassium, Dissolved (mg/! as K) Selenium, Dissolved (ug/1 as Se) Selenium, Total (ug/1 as Se) "Silica, Dissolved (mg/1 as Si0 2 ) Silver, Dissolved (ug/1 as J\g) Silver 7 suspended recoverable (ug/1 as Ag) Silver 1 total recoverable (ug/1 as Ag) Sodium Adsorption Ratio Sodium, Dissolved (mg/1 as Na) Sodium, Percent Sodium·+ Potassium, Dissolved (mg/1 as Na) Strontium, Dissolved (ug/1 as Sr) SulfateJ' Dissolved (mg/1 as SO 4 ) Uranium, Dissolved -Extraction (ug/1) Uranium, Dissolved -Direct Flourometric (pci/t) Zinc, Dissolved (ug/i as Zn) Zinc, Total Recoverable (ug/1 as Zn) Organic Parameters Aldrin, Totat (ug/1) Aldrin, Total in Bottom Material ( ug/kg) Biochemk.al O>·:ygen Demand, Five Day (mg/f) Chlordane, Total (ug/1) Chlordane, Total in Bottom Material (ug/kg) 2,4-D, Total (ug/1) 2,4-D, Total in Bottom Material (ug/kg) DDO, Total (ug/1) DOD 1 Total in Bottom Material (ug/kg) DDE, Total (ug/1) DDE, Total in Bottom Material (ug/kg) DDT, Total (ug/J) DDT, Total in Bottom Material (ug/kg) Diazinon, Total (ug/1) I I ·I I •• I_ I I I ·I I I I I I I I II I I I I I I I I ; I' I I I I I I I I Dieldrin, Total (ug/1) Dieldrin, Total in Bottom Material (ug/kg) Endosulfan, Total ( ug/1) Endosuffan,. Total in Bottom Material (ug/kg) Endrin, Total (ug/1) Endrin 1 Total in Bottom Material ( ug/kg) Ethion 1 Total (ug/1) Ethion 1 Total in Bottom Material (ug/kg) Heptachlor., Total (ug/1) Heptachlor .. 1 Total in Bottom Material (ug/kg) Heptachlor. 1 Total Epoxide (ug/1) Heptachlor., Total Epoxide in Bottom Material (ug/kg) Lindane, Total (ug/1) Lindane, Total in Bottom Material (ug/kg) Malathion, Total ( ug/1) Malathion, Total in Bottom Material (ug/kg) Mirex, Total (ug/1) Napthalenes, Total Polychlor (ug/1) . Parathion, Total (ug/1) Parathion, Total in Bottpm Material ( ug/kg) Parathion, Total Methyl (ug/1) Parathion, Total Methyl in Bottom Material (ug/kg) PCB, Total (ug/1) PCB, ·Total in Bottom Material (ug/kg) PCN 1 Total in Bottom Material ( ug/kg) Perthane, Total (ug/1) Phenols ( ug/1) Silvex, Total (ug/1) Silvex 1 Total in Bottom Materia! (ug/kg) 2 1 4, 5 -T, Total (ug/1) 2, 4, 5 -T, Total in Bottom Material (ug/kg) Toxaphene, Total (ug/t) Toxaphene, Total in Bottom Material (ug/kg) Trithion, Total (ug/1) ' Trithion, Total in Bottom Material (ug/kg) Trithion, Total Methyl (ug/1) Trithion, Total Methyl in Bottom Material· (ug/kg) Vana~ium, Dissolved (ug/i as V) Radioactive Parameters . Alpha, Dissolved Gross (pci/1 as U-NAT, ug/1 as U-NAT) Alpha, Total Suspended Gross (pci/1 as U-NAT, pci/g as· U-NAT, ug/1 as U-NAT) Beta, Dissolved Gross (pci/1 as Cs-137, pci/1 as Sr/Yt -90) Beta, Total Suspended Gross (pci/1 as Cs-137, pci/g as Sr/Yt -90, pci/g as Cs-137) Radium 226, Dissolved -Random Method (pci/1) Coliform Bacteria Coliform, Fecal -0.45 UM-MF (Cols./100 mi.) Coliform, Fecal -0.7 UM-MF (Cols./100 mi.) Coliform, Streptococci Fecal (Cols./100 mi.) Coliform, Streptococci Fecal -KF Agar (Cofs./100 mi.) Coliform, Total -Delayed (Co!s./100 mi.) Coliforrrr, Total -Immediate (Cols./100 mi.) ·~ I I I I •• 1 . I I I I I I I I. I I I I I I I I I I I I I I I I I I I I I I I I CLIMATE AND WATER QUALITY PARAMETERS MEASURED BY R&M Climate Parameters Measured ---------------- Wind Direction Wind Spesd Temperatur·e Relative Humidity Solar Radiation Precipitation Peak Wind Gust Water Quality Parameters Measured Field: Dissolved Oxygen pH (1 ) 1 CAP Scan includes: Conductivity Temperature Carbon Dioxide Alkalinity Settleable Solids Laboratory: ~ Turbidity Total Dissolved Solids Total Suspended Solids Total Phosphate! Kjeldahl Nitrogtan Total Nitrogen Nitrate N itrogetn Ammonia Nitrot~en Chemical Oxy~Jen Demand Hardness Chloride Color Sulfate (1 ) ICAP Scan · Uranium Radioactivity 1 Gross Alpha Organic Chf~micats Total Organic Carbon Total I norg,antc Carbon Silver Aluminum Arsenic Gold Boron Barium Bismuth Calcium Cadmium Cobalt Chromium Copper Iron Mercury Potassium Magnesium Molybdenum Sodium Nickel ManganeSE! Phosph.ortJs Lead Platinum Antimony Selenium Tin Strontium Titanium Vanadi.um Tungsten Zinc Zirconium I I I I· I I I I I I I I I I I I I I I APPENDIX E MISCELLANEOUS CORRESPONDENCE AND MINUTES OF MEETINGS WITH VARIOUS AGENCIES I I •• I :I ! . I ·I I I ' ! II I I .. . . .. ~ l R&M CONSULTAN,TS, INC. 5024 COROOVA • BOX 6087 =t ANC:HQRAGE. AI...A,SKA 995G2 Jt PH. 907•279·0483 a TL.X.. 090·~5360 ENGINEERS GEOI..OCISTS Pl..ANNI!RS SURVEYORS April 2, 1980 R&M No. 052303 Acres American, Inc. The Liberty Bank Building Main @ Cour-t Buffalo, N.Y. 14202 Attention: G. Krishnan Re: Water Quality Program servatk>n Dear Mr. Krishnan: Meeting with Alaska Department of Con- On March ~~8, 1980, a meeting was held with Dave Sturdevant (ADEC) concerning the Susitna Project water quality program. Present were Jim Landman, Lc:trry Pederson and Brent Drage. The meeting addressed the present statt.ts of the Susitna Project water quality program and a request by ADEC, that they be kept informed on the Susitna project progress. Attached is an informal response by ADEC to the Water Quality Program as outlined in the P .O.S. We explaired that the W.:~te.r Quality Program is currently under revision and once it is finalized we would send ADEC a copy. After describing our program and quality control procedures, he appeared to be satisfied. We are entering him on our Data tndex Distribution mailing list so that ADEC will be kept abreast of our progress .. Very truly yours, R&M CONSULTANTS, INC. Brent T. Dra,ge, P. E. Susitna Project Coordinator BTD/dj/L3-N ANCHORAGE FAHlDANKS ..... JUNEAU VAI...t:)EZ WASl~l..~ 02·00i8 tRev. 10/761 '!;TATE of ALASKA TO: r FROM: DATE: Dave Sturdevant Management & Technical Assistance' FileNO: TELEPHONE NO~ SUBJECT: March 14, 1980 Comments -Acres POS Susitna Hydro Development The following comprise a summation of comments regarding the water quality section of Acres American plan of study CPOS) for Phase I Feasibility Studies of the susi~~a Hydroelectric Project. 1. The POS recognizes the inter-relationship between water quantity and water quality. 2. Definitions of su."n..rner and \•;inter should be more clearly defined, utilizing break-up and freeze-up as transi·tion boundaries. 3. USGS will monitor ~emp~~at~~ on a continuous basis. This will ·be essen·tial for penni t and certification purposes. P..n under- standing of natural temperature variation \-;ill be valuable. 4~ Due to the glacial origin of the Susitna River, c.urbiditv should be monitored on more frequent intervals thxough the summer rnonths 1 including data at peak flow periods. 5. Field instrumentation should be clearly established, including models and degree of precJ.sl.on expected for each parameter. Methodology for each parameter should be established and clearly referenced. It should be EPA approved or meet specification guidelines. 6.. In order to assure accurate and reliable data, Acres should fnclude an outline of their qualitv cont~Ql Progra~ for each parameter to be rnoni tored. Ho~-1 often will the instrument be calibrated? What approach wiJ.l be taken \'lith regard to standard and referenc~ materials? Each parameter should institute some plan for quality control over the results. 7. Methodology utilized in the collection and transport of samp.les from the sampling point to the location for analysis should be clearly defined, including sample container prep- aration. 8. It is unclear as to ~,othat is !,71eant by total nitrogen on pg. 5-56. Nitrate (N03) and nitrite (N02) nitrogen \vould be more valuable for monitoring produ~tivity. It is the soluble, inorganic nitrate (N03) nitrogen that is utilized by the aquatic primary producers. Total kjeldahl nitrogen will monitor the degree of organic decomposition present. 9. It vrould be val.uable to acquire background data regarding nitrogen gas. Nitrogen supersaturation is a problem associated with large scale d~-ns . The potential has been addressed in the POS • throuah enaineerin<:r desiqn considerations. I I I I I I I I I I I I I I I I I I I I $..,. ;. I I I I I I I ·- I I I I I I I I I :I •• Dave Sturdevant page 2 March 14, 1980 10. Methodology for total dissolved and suspended solids should be defined, referred to l.n Standard r.rethods (14th ed.) as total filterable and non-filterable residues. Exceedingly high residue levels can produce interference in filtration, and drying .. 11. The tvpe of trace metals to be analyzed should be specified, including methodology, equipment and degree of precision. 12. A biological inventory should be established through coordi- nation with respective resource agencies, so ADEC can determine what species and life stages are most biologically important and sensitive. DEPABTJIENT OF FISH ~ND Gt\HE Janua17 31, 1980 ltr. Eih.Jard Reed Tene•tri.al &!v1r01lflen~al Special ista Inc. R.D. l, 1\oz 388 Pboenix, .Rev York 13135 I FILE: f5"1foo. ,,,-,io .m RA.Sii"'IER!tY ~ · ~Ai.ASJCA~ C(. E We rev!~ the hydrolo&Y seeti.au of t.he original Acres P.o. s. to dete'nline if t:he plamled climatological \'IOGi t:ori.ng ef"forts would be adequate for big g:aae a"bldies. lile c:ancl.uded that additicu.al stat:im:u:l wUJ. be necessary. 1'ba ecclosed 11ap indiJ:ate.s a.pproz1mate loeatious we recowW11C!. 1M a:ugest ttse of the stcaard SoU ~ticu Ser- Y1ca ~ course a:a4 reco•wod tht snov coursa.s be nm a~ a.ll cl iJM- tolosical auu.aus .. I ::uggest. that other prcject:a, partiJ::ul.a.rly furbearcrs~ !SJ" ban a.d.cU.- donal aeedJJ. A coord.i.naced approach uoal.d be BlOat efficient. Ve \I10Qld appreciatr:! it if you~ have the bydrologbts review oar propoaal aloq with othera. tie are villiDc to modify 01lr request. SOMNbat if necanwry aDf! wi.l1 partic1.pate iu aoae of the field ac:t.1"ri.ties such as MCtina up lltat:tous ami at lhat soae data pthe:c- 1Dg. lie vill al.o ued 1mre snov data dowstrua, but van-e tc llait unt.U we 'b.&ve identi.fied potmt1al sitea for detailed vegetatia= atudi.es. 'lbe..e aites v1ll probably be liOrfl ac.c:easible than those upstt~ ad 1-exp~:DsiYe to opuue. lile ba&i a &oocl meetiq with Jay after ,. left Fa.irbmlks. It: w.Ul tab a vbilc to tiOa:k etexyt.b:illg oat aDd 1111111 still a%'eu' t sure i.f it v:Ul.. be poss:O:Jle to clo all that we ~ Uke. Eowever. I th:f'Pk we agreei oa bow to ·~ tbiZJga and aeubluhed a good dr of coopcrat.:1an. We:= tille ~pu-c the squeeze Ott 301:1 lAM vil.l p1:obably be ~ joizlt Alaska ~t of l'ish aDd. Game.-Univerrit:y of A.La.ska effort. The e:r.ac.laaed.. schedule is prelh.dnary and jl!!tt deals vith .. jor field acd.rtt:ie.:a. Ve vll1 rdhe i~ as we go a.lcng and suppl~t 1t. in oar ~thl~ repotta. I I I I I I I ••• I I I; I! . ·~ ·ll t f .I' I I I I I I I I I I I I I I I I I I I N \ _j L l I ' " D VIL CANYON HIGH 2920 D.C. Ll . f't ~.,..·~-/\. ~"-"--, 0 20 MlLES t.6 l"\.. ' ' \ \ \ (...._ 0 ';> ~ ~ \ J \ . . r-(' ....__......,"\/ \,,.-_,..., 0 TYON£ L SUS/TN£ LAKE 0 PROPOSED DAMSDTES .6. EXISTING STATIONS • U.S.G.S. GAGIN~ STATION • SNOW COURSE PROPOSED STATIONS Q SNOW COURSE D STREAMFLOW GAGING V WATER LEVEL * SEDIMENT DfSC:~ARGE E9 WATER QUALIT~~ SNOW COURSE REQUESTED BV ADF&G • SUSlTNA HYDROELECTRIC PROJECT PROPOSED DATA COLLECTION STATIONS IN THE SUSlTNA BASIN-1980 I. I I I I I I I I •• I I I I I I I I I MINUTES OF MEETING held at the offices of USGS, Anchorage, Alaska on Friday, February 7, 1980. PRESENT: i~r. Don Baxter Mr. Brent Drage Mr. Ian Hutchison Mr. Tom Trent Mr. Richmond Brown Mr. Bob Madison t~r. Bob Lamke Mr.· Bill Long Mr. George Clagett Mr. Larry Leveen Mr. Harry Hulsing Mr. Brent Petree APA {Project Engineer R&M Consultants AAI Consultants ADF&G USGS (Associate District Chief) USGS USGS AK. DGGS Soil Conservation Service USGS USGS (AK. District Chief} AK. DNR 1. Presentation of Meeting Agenda (Don Baxter, APA) 1.1 Attachment 1 lists Agenda 2. Rules of USGS Partici ation in Harry Hulsing, USGS February ·11 , 19BO P5700.14.07 P5700. 14.03 rams 2.1 USGS can only cooperate with State or other government agencies (i.e., not private consultants) 2.2 Constr·aints: USGS basic responsibility .is regional assessment if water resources (i.e. not site specific work.) They must satisfy this responsibility in any cooperative program. 2.3 The State G and GS (Geologic and Geophysical Survey) is the designated agency for cooperative long term programs. 2.4 Currently USGS only has sole Federal funding to operate approximately 30 gaging stations in Alaska. The rest of the stations are run as cooperative programs. 2.5 In presenting new cooperative programs for funding the need for the information must be emphasized. 3. Current USGS Program in The Susitna Basin 3.1 Summary sheet was tabled by USGS. See attachment 3 4. Outline Of The H drolo ic Data Collection Pro ram Contained in the Acres POS Brent Drage, R&M -see attachment 2. General corrments by the USGS was as follows: 4.1 Vee Site Gage (Cantwell)-could be of interest to USGS only if we ensured it was not drowned out by reservoir at Watana. 5. page 2 4.2 Watana/Devil Canyon Sites -site specific,of no interest to USGS. They did not feel discharge would be required at Devil Canyon. 4.3 Maclaren at Paxson - 4.4 Susitna at Denali - USGS interested but would perhaps consider relocating further downstream at some future date. Bad gaging site. Not of major interest. 4.5 USGS are interested in gaging other tributaries such as the Tyone rivero I I I I I. 4.6 USGS amenable to go along with temporary locations for first part of progral and to relocate to permanent sites at a later stage. 4.7 Sediment gaging - 4.8 Water quality - No need·to collect sediment data the way it has been done in the past~ i.e. more or less random sampling. This has led to most data points being on the recession limb of the hydrographs and therefore not ideal for defining the sediment: discharge curve. Event type data collection is required to improve the current sediment: discharge curve, (i.e, intense monitoring during a range of storm or major runoff events.) 5:1 USGS sees problems in obtaining additional funding for cooperative 0 programs. 5.2 Attachment 4 was produced jointly at the meeting and lists all potential ga~ing sites and indicates which of these the USGS has no interest in. 5.3 USGS indicated they would review this table and r-espond in writing to APA outlining which of the remaining stations they could service as part of a cooperative program and what funds would be required. I I I I I I I I I I I I I I I I I I I I I I I I I I I I page 3 5.4 Note: Attachment 4 also includes the three .. Southern Tributaries .. ; i . e. , the Deception and \~i 11 ow Creeks and the Deshka River. It \-Jas agreed that these would be treated seperately under the auspices of the environmental task. (Task 7 in the POS) 5.5 Any cooperative program should be finalized as soon as possible so that it can be submitted for funding. 6. SCS Participation in Hydrologic Data Collection Program 6.1 George Clagett informed the meeting that U.S. Corps funding of the existing course stations in the basin had been withdrawn. No February 1, 1980 survey was undertaken. 6.2 To reinstate and complete this winter's program SCS would require approximately $3000 and the support would have to be finalized before the end of next week (i.e. Friday, February 15, 1980.} ' 6.3 George Clagett agreed to send a letter to APA indicating what the requfrements of.the SCS are to: 1} complete this winter's program, 2) .expand this winter's program to include the proposed additional stations mentioned in the Acres POS. (confirmed in subsequent telephone conversation between R&M and SCS, 2/8/1980. 7. DNR Participation in Hydrologic Data Collection Program This matter was not pursued because of lack of time. IH/ja cc: B. Drage D. Baxter File .1 J ;/) Reported by~~~~~~·-~~j-~ __ ·,========~~~~~~-1. Hutchisoo •• I I I I I I I I I I I I I I I I I I - 1. 2. 3. 4. SUSITNA HYDROLOGIC DATA COLLECTION AGENDA Introductio~ _ "-- Don Baxter -Alaska Power Authority Brent Drage -R&M Consultants Hydrologic Data Collection Program as envisaged December, 1979. • • Streamflow Sediment Chemical Water Quality Snow surveys Summary of U.S.G.S., S.C.S. and D.NeR. comments. Participation by U.S.G.S., s.c.s. and D.N.R~ • • • • Installation Monitoring Equipment and Supplys Schedule -1· - I I I I· I I I I I I •• I I I I I I I * * * * * * * * * * * SUSITNA HYDROELECTRIC PROJECT HYDROLOGIC DATA COLLECTION STATIONS Stream Gaging Stations .. Susitna Near Denali' 15291000 "' Maclaren Near Paxon 15291200 Susitna at Vee Susitna at Watana Susitna at Devil Canyon Susitna at Gold Creek 15292000 Chulitna near Talkeetna Talkeetna at Talkeetna 15292700 Susitna near Parks Highway Bridge Yentna near Susitna Station Susitna at .~usitna Station 15294350 §ediment Gaging Stations Susitna near Denali Maclaren near Paxon Susitna at Vee Susitna at Gold Creek Chulitna near Talkeetna Talkeetna at Talkeetna Susitna· near Susitna Station Chemical Water Quality Stations Susitna at Vee Susitna at Watana Susitna at Devil Canyon Susitna at Gold Creek Talkeetna near Talkeetna Susitna near Susitna Station *Data Currently Being Collected by U.S.G.S. I I I I I I I I I I. I I I I I 'I I I I u---l·~ z '1 I I o o /SZ#:Jzooo !CJ1-7- I 2£ Z l:...::::Z:...-:4~ .. -o.:;._;;;_o ------j~F~~~~:;o~li"f.~·:;:~~o::.::-·· ..L;J'?fr-Lnu:__r~--I:P:=e£ 4'-<--..c__.'!~· 3L!.. . ..£; IL'~' ~u.': S'~t.o_.J.o L':t-J,4' o~z~''-t. ~4:._::5'::...7l!.·o~.+w/fj!c!l."8~·-..a..Z2.. I : = ~---I /oJ~p~~~~ , --~~~-----~·~----------~~~~~~~~~~~~ ~ I -------~----~~----4-----~~~~~----~~----,_----~~~ l/ S 2..9 Z7 o 0 rTaJke cl;}(.,l I( /IY bZ0 2o ~9'( I!So 0 o/ o/1 z/oo ~ ~~~4-I ZC,.Ik c efno.. ----+-'---+----' I I I I I lt-----tid!/.,__~--=Z;;..._.j·~~Z.-~.-Cf.,..::.O....::.o ___ ~IGoo SE' C lnr ibz 0 al a.z" /50° ol zo' i rj Mo11/-o. r7 tt tr--,---------------T;i--~~~·~-----+-----+--~~~--------~--·--- I . 1 Co..stUt!/ C 11r t:./Ds-t/ 5'5 11 /~o 0 o;';?-~ /9,& Its z.?9o o .~ /6~ ICJ78- -- /52'14/oo .,. -·-'--I wtlfsw 75- l -lJ(i"'R L '2..- s-VSE::C:UL-L. orv (HAc. Q. 6oue HC>vTI-1 I ltH .. Jl(CfNA I -~-=· ==-::::::::"=·==-=-=:."c ..... - .. :=-==· =·~· ===========·=--~·-=-=========· ·-=~-.. --. ....=:::!·===;::::;, I Q I I I I I I I I I I I I I I I 0 'I I I I_ I I I I I I I I I I I I I I I I I APPENDIX F MONTHLY STREAMFLOW DATA · FOR ALTERNATIVE HYDRO SITES ----------------- . SNO~J [IAMBITE ==========-==:::-.:=::~=====================::--.:=::::========~=;:;-===============================-========·======== ·=-======~=== . . ST~~EAMFLOW (CFS) ______________ -...&t...,. OCT NO~ DEC JAN FEB MAR AF'f~ MAY JUN JUL AUG· SEF' YEAR <31.) ( :30) (31) {31) (28) (31) (30) (31) (30) (31) (3l} (30) 1 664. 343·· 241. 74. 58. 42. 78tc 349. 2702. 343. o. o. . , .:_ 3;->3 ~ . 138. 51. 31. 25. 31. 46o 257. 1665; 2904 • 2009. 2200 • 3 243. 3081i 162. C-"8 ~ . 39. 37. 40. 182.-2709o 3101§ 3258. 1762. 4 189. 63. 38. 31. 26. 25. 49. 241. :L447. 33(35. ~~047 + J030. 5 :l60. 90. ·'59. 36. 32. 30. 27. 94. 14C,3 ~ 3512. 2:l46. 601. 6 11"'")C.-1:"44 176. 93. 66. 47. 119. 1192. ~5016. 4329. 3269 •. 137(). . .:..u. '·' t 7 1 ()()9. 1 'lty 70. 52. 40. 34. 51. 505. . , .. )7&::" 2503. 2472 • 716. .:.. . .:...:.. 'lol • 8 299. 257. 106. 65. 40. 3'"~ 36. 193. 1324~ 435(). 2436. 1310~ .:..t 9 148. 70. 43. 40. 34. 31. 52. 264. 1044. 2901. 3:1.94. 776. 10 11 c.-. \J .. 99. 93. 46. 41. 44. 67. 318. 2850. 2337. 2449. 3451. 1l. 828. 3'")-5 ~' . 107. .83. ~1 u • 40. 136. 368. 3285. 2990. 2814. 299. 12 1. Bt>. :L17. 73. 4£1. 37. 33. 77. 708. 3397. 244~5. 2028. '">7&::" ~ \Jt 13 22'1. 162. 98. 6~3. 1:'7 i;J i} 42. 56. 1843. 2692. 3317. 2289~; 822. 14 237. 164. 199. ')I:" 6 .:..:U • 1<09. 52. 66. 930. 2901. 3710. 2792. 1575 • 15 ?':>t. ......... 1 .. )8 .:.. . 60. 49. 38. 29. 9:t. 224. 2316. 29(37. 1847 .. 372 • 16 ~514. '')69 .:.. . 93. 55. 53. 60. 4<J. ")ar.:· ~.. ...., t 14BO. 344:3. ")') 11::: .:....:.. :U• 1447 • 17 ?7'"). 103. 1'16. 78. 56. 39. 134. -216. 3628. "9-59 "96 •") l t:."'7t;" ..... ." ~ "' . ..:.. .:... • ,,J \.:It 18 269. -:l77. 120. 94. 5'"> .:..t 71. 135. 22(/. 1578. 301f:J. ~,")B3 ~..:.. .. t c.~7'=" . \,) ~. 1 '? '"•47 ..:.. + 87. 68. 55. 39. 39. 66. 207. ?6<J?. -r...., 2'178. ~3373. ~:H)97 • 20 444. 164. 74. 47. 43. 39. 48. 2f:19. 2285. ')1::"7') ,:_ \:J ~: ..• 3020. 4B29. 21 3:t4. 147. 112. 84. 78t. :1.00. 59. 689. 2057. 2727. 2132:, 422. 22 13e). l.06. 1:" '") 31. 3B. 39. 83. 4Eh!>+ "5\!~ 4~ 2829. B'13·. ;~9fi. \:J.:..t ' ,) .. J • 23 37~54. '')77 267. 121. 119. 105. 94. 3:l4. :LfJ91. .2'7t3"7. 2498. 1::' "5 '") .:.. . ~;.),~ . 24 l.45. 698. 102. 49. 41. 40. 43. 189. '")41::'1 .:.. ~ . 42c)~~. ~i8~~3~ :t360. 25 2c,5. 94. 59. 3~ ~. '")7 ..:.. t . 31. 29. :1.63. 982. 2'794 t '")&::"8"") ..:...;:) -~., . :L3B2. 26 ':>31 ·-t 103. 63. 430. 31::" 'Ut 31::" ' u. 53. ~l91 ~ . 1449. 2565. :l756 t e~·77 a '"_) 7 :1.4B. 73. 5'7. 43. 35. 33. 67. 67. ,, 1'')1::· ':>5:18 1~i21., 4 :t.t30. ..... ~ ~\J. .... .. . BRUSKASNA DAMSITE :::::::::::::::::;;::::::::::;;=:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::.:::::::::::::::::::::::::::::::::::::::::::;:;;::::-.::=:::::::r~=================='========-====-======================-======:r====:::. STREAMFLOW <CFS> " ....,._. __ , ____________ OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AU''"" SEP ','0 YEAR (31) (30) (31) (31) (28) (31) (30). (31.> (30) (~51) (312J; (30) :l 5()3. '>11 188" 179. 151. 142. 213. 2016. 2286. .1782. .. 71~ 2539. .:.. . J. ~ .. ·~) 697. 466. 338. 229e 174~ 146. l.60. 719. 3400. 2674. 1781~ 1468. ..... :3 1049. -'l39 t 465, 119. 101. 128. 201. 1318. 3134. ·1771. :t. 91 sf4t 2096. 4 636. 256. ~11 .• 183. 152. 119. 137. 1197. ~':)o~~ 1928. 2413;~ 1498. lt-.4!. \.: t 5 688. 417. 191. 183. 183. 174~ 146. 1540. 3874. 2963t 262:41'/t 1991. . 71.7 • 334. 289. 1 fj)2. 174. 146. 151. 1992~ 41.16. 'l67 7 • 261tl~ 1776. .. , \.1 .:.. ... 7 8~';4. 413. 283. 206. 187. 179. 209. 1872 •. , 3969. 2835. 2A6r4-1H29. 8 fJO·.tl ~ 38']. 266. 193. l.76. 168. 1.97. ., 76#"' 3736. 2669;) 2.31~-ii!: 1721. «. .... 9 615. 330. 202. .. -;a 151. 114 • 146. 1946. 2733. 2645. 204~. 1417. J. ,. . • :LO 831. 480. 314. 286. 234. 210. 196. 2476. 1329. 1945. 230~~ 2245. l:l 7 f.>6. 28~1. 266. 244~ 1.77. 181. 268. 2395t 3082. 2480. 2636~ 1566. i ') 881.~ 46B, 308.' 260. 200. 179~ 206. 1866. 4451. 2787. 208.1~ "V) 11 ' ~ .. ~ . ..__..:.. . :L3 853. 442. .. ,.::-6 'J10 1.92. 174 • 192. 1647. 3651. 3507. "''"'"'l.? 133') ~u • .:.. . ..:!,Q.:.. ~-4t.. • l4 946. 371. 165. 174· 137. 119. 174. rtac::: 3802. 2820. 17:tl"' 1147. .:.. ... , . - l ~; 935. 411. 248. 176. 14t'>. 146. 230. 2009. 3751. 3180. 1583,_ 2106. 16 1016. 41 ... , '"t47 197. 174. 165. 183. 1:1.99. 4799. 1881. -:•? 1 C< :l660. .:_ . .:.. . ~;.;;... ' ,. 1 '7 712. ... )39. 204 • 179. 164. ~51. 151~ 1603. 3291. 18<i6. 30641~ 1403. .... . :l.B 738t. 436. 307. • ., !::" 6 ~"}'") 0 199. 19') 1906. 4649. '") '') 8"1 l:lYQi,. 746. .:..U t ._,;.,. . .... . ...~ ~· 19 416. 130. El5. 75. 73. 76. 164. 1807. 2063. 1160. a'·,.~ 6()0. ..... 'lt 20 417. 241. 1B8. l67. 160. 11::"6 168. 1..-:'•:>j 2447. 3130. 229::S,_ 1261. -.1 • u.:.. .• ?j 611. 246. 181. :L5B. 1~:·3 :1.46 t 139o 7J::"'l ~96°' ")1!."<!:7 "91"':'1 1l)1B. .... . • \J-. • ,J. • ;;J ~.<t .:.. ... J ,) t ... ' (.t ~ 'J ':) El07. 451. 282. :l58. 146. 146. 149. 1780. 3281. 2013. jl::' :t 10:'' 1140. ..... ... , .JI" 23 729. 365. 246. '1 10 197~ l.87. 18B. 1l)98 t ~5068. :l891. ~,03;5 1061· ~ . .:.. ' 't 0 .. ------------------- ------------------- · KEETNA DAMSITE a ========================================================================~==================~=============== STREAMFLOW <CFS) -------~-------- OCT NOV DEC ·JAN FEB MAl~ AF'R MAY JLJN JUL AUG SEF' . fAI"' (31) <30) (31) c:)1 > (28) (31) (30) (31) (30) (31) (31) (3()) I :. .. '\ ., ., - '. 1 695. 977. 692. 449. 3Beu 336. 361. 2165. 6911. 6343· 6948 .. 6611. ':l _27_65 ~-21_0_, 5:!j6. ___ 443t. 328 • 246t -_263. .. 1502. 8082. 6294· -6686~ __ 33~6. .... 3 1488. 559. 467~ 397. 340. 293. 266. 2562. 5786. 7f351· 81324 .. 4344. 4 1264. 781. 615. 530. 484. 463. 613. 5508. 8786. 6998t 4702-. 2567. 1:!" _1020_t:.. __ 515_~. 3.46t ---286 t _250a. -· _237'.. . 323. 2411. -~_ '"'4 t::" _ 4~l2." -· 2aotl-. __ 129Q. .. , . ~~ ...... 6 904 ·~ 477. 366. 314· 285. 274. 340 .. 2461. 4972. 6431. 5454. 3.734. '7 1755 •. 1026. 687. 423. 286. 250. 313. 1 ;~37. 11864. 7320· 10450., 3733. B _,. ~4 0 t. _ru_~-~ 34Q. 453! 391 ~. --300. 323. . _., ?:1.~ !_!._ _79!4..!.. __ 24Y~..!.. r:9o.-··-~42? t ,) -~'to 9 2262. 854. r:~4 466 • 408. 358. 356. 2405. 7608. 4783. 61Se.. 2406. ..J .. J • .lO 1126. 598. 464, 402. 348 • 300. 333. 3~J38. 5004. 4832· 4801. ';.'968. :l.:l ~~;t.!.. ___ 624!. __ 482!. -~~2.!-_371.!.. _;317 ..!.. 3 •") C" •)C' 4 5 §2 ~ :~. 7521. 52SS. 4960. _..._. ..: .... •:;!_•_ ~ ·-~!:!--~!. ·-- I ~ 1.!.797. 482~ 348. 327. 299. 293. 382. 2143. 6593. 5624· 5040~ 1997. '. ,.·.,.. l :5 1157. 688. 666. 463. :~42. .315:; 341~ 2645. 11391. 58:~3. 49SS. 3716. 14 .. ao~~.!.. b99~ 536..!.. -46~.!. 359. _3_Q_2..!.... ---~3~..!..-. _J_{i;i.6..!. 4629~ 6724~ _ _.136~ __ _2314e-_ ..... -.... -,. _ .. ~ ...... ,,,.,.. .. ---,..-. ------~--.... -·-.,·---.. BROWNE. DAMSITE STI~EAMFLOW CCFS> ---·------------- OCT NOV DEC JAN FEB MAR APf~ MAY • JUN JUL AUG SEf• YEAf~ (31) (30) (31) (31) (28) (31) (30) (31} .(30) (31) (31~ (30) 1 1894. 79.cl. 707. 673. 569. 535. 804. ";"598. 8616. 6715. 6453~ 9569. ':> =~626. 1.756. 1273. 863. 656. 552. 604. ~709. 12816. 10080. 67:l2. 5535. ·- 3 3955. 1656. 1001. 449. 380. 483. 759. .t} it16 '} • 11812 • 6674+ 72.t9 .. 79<>6. ·4 2398. 966. 794. 690. 573. 449. 51!3. 4L o~ 8302. 2767. 9096., &::"64t;.~ '-J ..;,. 5 2591.. 1570. 721. 690. 690. {l 656. 552. 5804. 14603. l:l166. 9890~ 7505. 6 2702. 1260. 863. 725. 656. 552. 5691) 7509. 1&::-~14 1009(). 9t~69 ~ 6'694. •.• h.i • 7 3218. 1556. 1064. 773. 703. 673. 787\!i 7047. 14943. 10674t 9:376, 61385. 8 3084. :1.491. 1020. 742. 674. 645. 754. 6754. 14320. 10229. B8'10, 6598. 9 2319. 1242. 763. 669. 569. 431. 552. 7336. 10300. 9969. '77:l9. ~·34r) ,.; ,;... . 10 3133t :l80EJ. 11 Ei4 • 1077* 883. 790. 738. '1334. 5007. '7329. Bcl92:-f34:l6. l:L 2888. 1052. 1004. 918. 666. 683. 1011. 9027. 11619. 9348. ~9'lS .::· 'i 'l4 t ' .. , ., ,.; . 1 ") 3~520. :1.763. 1159. 980. 756. 673. 814. 7033. 16777. 10504. 7B4:~ B:5:.~3 • ..:.. l3 3216. 1667. 961.)0 794. 725. 656. 725. 'ilt>59 (! 13761. 1311 ':)0 10650:. .:..-0"')1 ~..:.. . u .... • 14 31:'61:' 1398. 621. 656. 518. 449. 656. 1.073. 14331. :J.062B. 6449. 432"1 t \J \:Jt 1&::" 3t::'')3 l549. 935. 663. 552. 552. 282n 7571. 14138. 11988. 5966. 7'';37 • ... J ... , ..:.. . 16 3830. 11::"C"3 932. 7~·~~ 656. 621. 690. 11::",.)0 1808B. 7091,. B:"53041 6:)29. \J,..I t ..:..\.Jt \J..:.. • 17 2685. 901. 770. 676~ 618. 569. 569. 6042. 12409. 10911:1. 1155() •. '),.H]O ' . ..:. . 18 2781. 1643. 115{)+ 956. 828. 749. 7')1::" 71. EJ4. j :)C:"')1 8603. 44B6-. ')81 ') .~tJ. •• (0 w.:.. .... ..:.., ll 41!... '19 1567. 490. 321. 284. 27tH 285. 61B. 6t:J12. 7774. 4372. 3:l 06 .. ,.) ~·) C: () ...... ..:.... ,) . ,. ') 1570. 900. 707. 1.>31. 604. 587. t>~55 • 1:'7'3') 7224. 1179c1. 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H.JL AUG SE,::· YEi~ll~ (31) (30) (31) (31) (28) (31) (30) (31) (30) (31) (31) (30) 1 472. 664, 470. 305. 263. 229. 246. 1472. 4699. 5:L 61 • 4725. 4496. •") 1881. 619. 371. 301. 223. 167. 179. 1021 •. 5496. 2480. 45·47. ..) .-,-~s ~.:.../ . 3 1021. 3BO. 218. 270t ~3t '")00 181. :L742. 393~'5. 533(/. 6000. 2454. ~ .. .:.. . 4 860. 5:13. 418. 361. 329. 3'' J::" 417. ~3746. 5975. 4758. 3197" 1746. J.iJt .::-694. 350 • ~>36 194. 170. 161. 220. 1639. 2206. 3000. 1605. 877. \J .:.. t 6 614. 3r)4 249. 214. 194. 186. 231. 1674. 33E}.1. 272~5. ~5708-< 2539. .:.. . "'l 1194. 698. 467. 288. 194. :1.70. '113 909. B()68. 4'18~5. 7106. 2538. , .:.. . B :1.115. 555. '")31 308. 266. 204. 21 (/. 1490. 538:L 6 5097. 4055~ ~56 <tO. .:.. . 9 1538. 581. 377. 317. ... )'77 243 • 242. 1636. 5174. 3253. 4206*' :l636tt .:.. t 10 766. 407. 316. 2'73~ '''37 204. ")':>7 2406. 340:3. '4'">86 ~5~~64. 2018. .:.. . ..:..... . ,.., .:.. . . ll 837. 425. 32B •. 294. 248. 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JUL AUG SEP YEcqF\ (31) (:50) C51) (31) (28) (31) (30) (:51) (30) (31) <:51.> (~50) 1 ':)Q??. 992~ c>58 • 504. 381. 3'1·1:.~ .250. 1JlA''5 6368. 10500. 1030(). 4:-\64. ..... ........ .:.:\.J • ..~, . '") 1800. 11:1.6. 882. 817. 7BO. 5-4/4. 394. 876. 5673. 12090, 12:330. 6989. .::.. 3 2638. 1200. "73(). 690. . 630. 540. 470. 620. 5222. 13000. 1 '1,.l81::' 5317tc .:.. ,:.. ~J t 4 1.827. 1144. 744. J.-:"~'3 :~87 t '7 j. j 332. '748. 3441. 12640. 1rv>40 77:39. -v ... J •• ,JO , t ;:...JI!.. • t I:" 2768. 1 ~384. 1007. 618. 436. 434. 370~ 471. 6278. 10590. 120:50. 5654. .J 6 2026. 1090. B52. 620. 449. ~560 •. 350. 525. 2114. 10020. 13180 t 10260. 7 4027. 1180. 650. 480. 400. 350. 350. 615. 5995. 10040. 10310. 7142. B 3790. 1100. 820. 600. 500. 430. 380. 935. 661.6. 14380. 16610. 7333. 'i 2939t 1565. 947. 626. 535. 490& 511. 1695. 6:l90. 12580. 12:L70. 4:569. 10 1 I.":' I::'·:> 93')). 823. 639. 550~ 500. 533. 1003. 6548. 13100. .B4:l6. :~~'347. -.}\:)A'" t l:l 309B, 1822. 1006. 705. ~::·6a 1:"1:'0 625. 1285. 4893. '1960. BB84. 36B7. •• J t \.hJ • 1 #:) 220:L. 1247. EJ29 • 1::"3") 467. 467. 692. 2381. 10930. 14470. 13710. 451:5. ..:... \.J ~ •• 13 1351. 902. 726. 585. 4B4. 446. 481. 906. 4294. 12860. 1 -=>7r=-o 6995. ~ i:J • • STRANDLINE LAKE DAMSITE ==·=-=====::::::::=====;==:...~=====::::::::::::.::::::::::::.:::::==::::::::::;:::.:::::::::::::::.:::::::::::·::::::::::::::::==;:::::::=:::::::::====·!:::::::::.:::::;::;========:.".:::::::::::=::::::~=::::::::=:==:..".:::u::::;:::::::=.===:==·::::.:== STREAMFLOW <CFS> --------·----·---- OCT NOV DEC ,J,~N FEB MAl~ . AF'ti: MAY JUN ,JUL AUG SEF' YEA~~ (31) <~Hi) (31) (31) (28) (31) (~50) (31.) ( :30) ( 3:'.) C31) (30) 1 97. <~18. 3~') ··-. 24. 1B. 16. 12. 72. :50'7. ~506. 497. 210. 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'28?0! ~7.!.1_ .. _!444 !. 9 .. _-·~!.. --L. . :-! ! . ---- 10 676. 359. 279. 241. 209. 180. 200~ 2123. 3002. 2899. ~~BBO .. 1781 .. 735. 375. 289. 259. 219(' 190. 195. :J C::•'} 7 4928. 4513. .3173. 2976. • i:J ... • 11 1078. 289. 209. 196!.. 179. 176c 229. •1;~86. "5956. 3375. 3024 .• 1198. 12 ---------~-·--__ .,..,,...,.., .... _. --·-·h ~ ... -, -0 694. 413. 400. 262. 20S. 189. 205& 15H7. '!096. 3494. 2993. 2229. 13 1222. 419~ 322.· 279. 215. 181. 200.-11 o:i. 2178. 4034. 2618. 1334. :1.4 S2w. 42£· -. ll jl-Ju· ,_ 8'$" •. 2.4!, • c!ll b. 2-bS. ---·-:L il.2-=-_ ____!i_4 9~:.. _§ ~ 9 9 '---·~ ~~!., "" /SI~ · , -··----.. -------·-· f 1 "''!>. \" \ •• • : ~~ I I I I :I I I I I I I I I I I I I APPENDIX G CLIMATE DATA STATIONS (3) I I I I I •• I I I I I I I I I I I I I CLIMATIC STATIONS IN THE SUSITNA BASIN Index Number 0610 0618 0620 0630 0640 0650 0660 0670 0671 0672 0673 0674 0675 0676 Station Name Susitna Glacier Gracious House Denali Tyone R. Kosina Cr. Watana De vi Is Canyon , McKinley Park Healy 2 Healy Power Plant Healy Power Plant J I Rapids Big Delta Paxson 1 NOAA Reports. Available: Measured By R&M NOAA R&M :l&M R&M R&M R&M NOAA NOAA NOAA N.QAA NOAA NOAA NOAA 1 Report Available B B 8 A A A Annual Summary with Comparative Data (see Ref. 11) B -Annual Climatologic Summary (see Ref. 11) * Miscellaneous Wind Data Period of Record 7/20 -8/7/80 8/7 -8/14/80 8/28 -Present 1959 -1978 7/18 -8/28/80 8/28 -? 10/17 -Present 8/27 -8/30/80 10/17 -Present 8/25 -Present 4/8 -6/10/80 6/19 -7/30 8/14 -10/2 10/17 -Present 7/17 -8/28/80 10/16 -Present 1949 -Present 1972 -Present* Miscellaneous \rVind Data* Miscellaneous Wind Data* Miscellaneous Wind Data* 1949 -Present* 1922 -Present Index tP Measured Number Station Name By .... - 0677 Gulkana NOAA ' 0678 Summit NOAA 0679 Chulitna R. Lodgr.: NOAA 0680 Edgemire Lakes NOAA 0681 Chulitna Hwy. C~mp NOAA 0682 Talkeetna NOAA 0683 Wilfow Hwy. Camp NOAA 0684 Whites Crossing NOAA .Q685 Puntilla NOAA .. ~ 0686 'kwentna NOAA ...; 0687 Anchorage NOAA 1 NOAA Repor:ts Available: A Annual Summary with Comparative Data B -Annual Climatologic Summary * Miscellaneous Wind Data . ' . ~ . . . ' . . ·~ ;~· ~·... .. . . · .. :· •. " ··( . ··>' ; . . . 1 Report Available A A B B B A B B Q 8 8 A I I Per-iod of Record 1949 -Present* 1946 -Present* 1971 -Present 1971 -Present 1972 -Present 1949 -Present* 1977 -Present 1971 -Present 1949 -Present 1949 -Present 1946 -Present I I I .I I I I I •• I I I I I I I I I I I I I I I I I •• I I I I I I I I MISCELLANEOUS WINO DATA Stations: Healy 2, Healy Power Plant I, Healy Power Plant II Table containing wind speed percent frequency and cumulatfve freqt.Jency at one meter per second increments. Table containing wind direction freque'ncy in percent. Table containing wind speed .. - and joint frequency. Station: Rapids Period summary by combined velocity groups (1 to ·12 observations daily) covering 1935 -1941. Station: Big Delta Period summary by combined velocity groups ( 1 to 3 observations daily) covering 1935 -1941. Station: GuJ kana Percentage frequency of occurrence, direction by speed groups - a summary of the data between January 1945 and November 1958. Station: Summit Period summary by combined velocity groups (16 observations daily) covering 1940 -1941. Station: Talkeetna Period summary by comb;~led velocity groups (16 observations jaily) covering 1940 -1941. I I I II 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 t~ I I I I I I I (I APPENDIX H SNOW SURVEY -STATIONS AND PERIOD OF RECORDS (3) : c;; ,.+ : ; ' •, l J If • • ~ 1 ' • t" :,."'" qi!li(j· .. !' , _ .. ~ ,• '.J>' ,)>~ ~ • • '. • • ~ll ... t. . ~ • Jl. •• • ' • • .,._ 'i I 1: I I I I I I I I I I I I -a I I I -i 0800 SNOW SURVEY Sno·w depth and water equivalent. data have been collected by the U.S. Soil Conservation Service, the~ Alaska Deparm•~nt of Fish and Game and R&M Consultants. The locations for which this informa-- tion is available at'e listed below generally in order from the up- stream end to the downstream end of the Susitna Basin. The ADF&G markers have been established for the purpose of studying the effect of snow depth on game movements. There are 8 locations each along a tributary stream to the Susitna River with 4 - 6 aeriaJ snow markers at each location. These markers are placed at different elevations moving up the strearr. valley. The cross r·eference numbers for SCS sites listed on the following page correspond to map numbers as published in the Snow Survey Bulletin issued by the Soil Conservation Service~ Cross reference numbers for R&M and ADF&G snow courses are arbitrary. These will be changed to map numbers when they are included in the Snow SLJrvey buJietin. All of the data listed can be obtained from the agency responsible for the snow course or from R&M Consultants. a Index Number 0802 0803 0804 0805 0806 0807 0808 0809 0810 081"1 0812 0813 0814 . 0815 0816 0817 0818 0819 0820 0821 0822 0823 0824 0825 0826 0827 D829 0830 0831 Course Name Cirque Jce Cave West Fork Gl. * Crevasse Mt. Hayes* Caribou Malamute Mt. Deborah Aurora Peak East Fork* Pyramid Jatu Pass* Monahan Flats* Denali* Butte Creek Moose Red Fox , C 1 ea rwater Lake* Tyone R.* Lake Louise* LittJe Nelchina Kosina Cr.* Oshetna Lake* Goose Creek Coal Creek Gaging Station Cr. Jay Creek Kosina Cr. Watana Cr. Fog Cr. Measured By ' ·R&M R&M R&M R&M R&M R&M R&M R&M R&M R&M R&M R&M scs R&M R&M R&M R&M scs R&M scs scs R&M scs ADF&G ADF&G ADF&G ADF&G ADF&G ADF&G ADF&G Cross Reference Number W-1 W-2 W-3 S-1 S-2 S-3 S-4 s-s S-6 E-2 E-1 E-3 25 B-3 B-2 B-1 26 29 31 30 8 7 6 5 4 3 2 Years of Pr'"evious Record 15 14 15 12 15 Drainage Basin West Fork Gl o West Fork Gl. West Fork G. Susitna Gl. Susitna Gl. Susitna Gl. Susitna Gl. I I I I ~· I East Fork Gl. J· . East Fork Gl. West Fork Gl. Susitna River I Butte Creek Butte Creek Butte Cr·eek Maclaren River Tyone River Tyone River Oshetna R. Kosina Cr. Oshetna R. Goose Creek Coal Creek Gaging Station Jay Cr·eek Kosina Cr. Watana Cr. Fog Cr. I I I I a· Cr. •• I I * Indicates site with snow course and aerial stadia marker, al.l other aerial stadia •.. markers only. ~ I ~ • J ·"' • • • • • "1:. . .. : ··,: ~ . ··:. ~; ,;, . ~ .. <'' ::'.''·~; I I li •. I I :I I I I I ;·· il :I :I il ' ,I ••• I I Index Number Course Name 0832 Devil Mountain 0833 Fog Lakes* 0834 0835 0836 0837 0839 0840 0841 0842 0843 0844 o"'845 0846 ; 0847 0848 0849 0850 0851 0852 0853 0854 0855 0856 0857 0858 0859 0860 0861 0862 Watana Camp* Devils Canyon* Devils Canyon Talkeetna R. Chulitna R. Talkeetna Middle Fork I ron Cr. Rainbow Lake Bald Mt. Lake* Talkeetna R. Pass Sheep River Sheep Creek Cirque Upper Kashwitna R. Kashwitna R. Cirque Little Willow Cr. lnde~endence Mine Deception Cr.* Mt. Bullion* Capitol Site* Wiiiow Airstrip Tokositna Valley Ramsdyke Cr.* Dutch HHis Peters Hills Chelatna Lake Skwentna* Alexander Lake* Haggard Cr_. * St. Anne Lake* Measured By ADF&G scs R&M R&M scs . scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs scs Cross Reference Nt.Jmber 1 24 124 135 137 22 134 136 23 133 132 131 130 129 128 33 142 141 140 32 21 20 19 18 '48 28 Years of Previous Record 'fO 3 13 1 13 1 2 15 1 1 1 1 1 1 13 1 2 2 16 12 16 12 16 14 15 "' Susitna River Fog Cr. Susitna River Susitna River Susitna River Talkeetna R. Talkeetna R. Susitna River Talkeetna R. Talkeetna R. Talkeetna R. Talkeetna R. Sheep River She.ep Creek Kashwitna R .. Kashwitna R. Kashwitna R. Willow Creek Wi I low C t"(!ek Willow Creek Willow Creek Willow Creek Kahiltna R. Kahiltna R. Kahiltna R. Kahiltna R. Kahiltna R. Yentna R. Yentna R. Copper R. Copper R. * Indic'ates site with snow course and 'aerial stadia marker, all other aerial stadia markers only .. 0900 SNOW CREEP· R&M is currently planning to install devices for measuring the ·effect of snow c~·eep forces on transmission line towers. Two locations are planned along the propt;)sed transmission .line route. As this data is collected, it will be filed at R&M according to site number and name. Some previous research on snow creep was done by the U.S. Army Corp of Engineers· in 1974, reported in the following paper: Snow Creep Investigations in Southeast Alaska; Meyer, Robert. .Alaska District, Army Corps of Engineers. I I I I I I I I APPENDIX I DATA COLLECTED ay· ALASKA DEPARTMENT OF FISH & GAME (3) ( . : ·"1 I I I I I I I I I I I I I •• I I I I I ~ DATA COLLECTED BY ALASKA DEPARTMENT OF FISH AND GAME (ADF&G) FROM THE SUSITNA RIVER BASIN BETWEEN 1974 and 1978 Streamflow, water quality and water temperature data have been collec~ed by the Alaska Department of Fish and Game at a number of locations within the Susitna River Basin. Since the measure- ments h~:1ve been taken periodically, the number of measurements, timing and specific parameters measured vary from year to year at any given station. I nfot·mation available from the Afas ka Depat't- ment of Fish and Game has been included below. These reports are all on file at R&M Consultants. Barrett, Bruce M. 1974. An assessment study of the anadromous fish populations in the Upper Susitna River watershed between Devil's Canyon and the Chulitna River. Cook Inlet · Data Report No. 74-2. Alaska Department of Fish and Game. Division of CommericaJ Fisheries. 56 pp. . Figure 10: Figure 11: Profile of Susitna River water temperatures for September 4 11 at Gold Creek and Devil's Canyon Fi shwheel Camp. Profile of water and air temperatures recorded daily at east bank fishwheel. Friese, Nancy V. 1975. Preauthorization assessment of anadro- mous fish populations of the Upper Susitna River watershed in the vicinity of the proposed Devifls Canyon Hydroelectric project. Cook Inlet Data Report No. 75-2.. Alaska Depart- ment of Fish and Game -Division of Commerical Fisheries. 121 .PP· Table 10: Table 11: Table 12: Table 13: Survey ·of winter_ conditions in Indian River, Lane Creek and Gold Creek. Analysis of Water Conditions in Indian River, at Chase Creek, 1974 -1975. Analysis of Water Conditions at Gold Creek, 1974 -1975. Analysis of water' conditions at Parks Highway Bridge, 1974 -1975~ RHs, James C. 1975.. Pre-authorization assessment of the Susitna River Hydroelectric Projects: preliminary investigations of water quality and aquatic species composition. Alaska Department of Fish and Game. Division of Sport Fish. 61pp. Figure 1: Figure 2: Figure 3: Daily water temperature in the Susitna River at Parks Highway Bridge, June 20 -September 23, 19750 Maximum daily water temperatures of Birch Creek, April 11 -August 30 1 1975. Maximum daily w.ater temperatures for Willow Creek, April 10 -September 23, 1975. I I I I •• . ' •• I I I • •• I .• , I I I I 'I I I I I I Table 9: I I Table 10: I Table 12: I I Table 14: I I .. Table 1o: I Table 17: I Table 18: I I Table 19: I Table 20: I I I I Maximum and minimum daily water temperatures for the Susitna River at Par'<s Highway Bridge, June 20 -September 23, 1975~ Maximum and Minimum daily water .temperatures from Willow Creek, April 11 -August 30, 1975. Maximum, minimum and mean values of water quality data collected f~om the Susitna River and seven tributaries of the Susitna River. Water quality March 25, 1975 Sunshine. analysis from the on sample taken Susitna River at Water quality data collected from four tr-ibutar-ies of the Susitna River, August 1975. Water quality data collected from the Susitna River above Gold Creek, August 1975. Water quality data collected from the Susitna River above Portage Creek, August 1975. Water quality data collected from 15 sloughs between Tall<eetna and Portaae Creek, . -August 1975. Water quality data collected from Susitna River near Jay, \Yatana and Deadman Creeks. Riis, ~ .. ~- James C., 1977. Pre-authorization assessment of the proposed Susitna River Hydroelectric Projects: preliminary investigations of water quality and aquatic species compos· ition. Alaska Departmeot of Fish and Game. Division of Sport Fish. 91 pp .. Appendix A Tabfe 1: Table 2: Table 3: Tafole 4: Talble 5: Table 6: Table 7: Table 8: ' .. Water quality data collected from the Susitna River at the Parks Highway Bridge. between July 21 and October 1, 1976. Water quality data collected from the Susitna River at the Gold Creek Railroad Bridge between July 13 and October 1, 1976. Water quality data collected from the Susitna River upstream of Portage Creek between July 15 and October 29, 1976. Water quality data collected from sfoughs 8 and 10, between June 25 and September 30, 1976. Water quality data collected from sJoughs 11 and 13 between June 23 and September 30, 1976. Wat~r quality data collected from Sloughs 14 & 15 between June 25 and ~eptember 30, 1976. Water quality data collected from Sloughs 16 & 17 between June 24 and September 29, 1975. Water quality data collected from Sloughs 18 & 19 between June 15 and September 29 1 1976. . ' ·f ' ~ ~ , . . ' . I I I I I •- 1 I I I I I I I I I I I I ... I I I I lo I I I I I I I I I I I •• I I .; Table 9~ Table 10: Table 11 :: Table 12: Tcble 13: Table 14: Table 15: Table 16: Table 17: Water quality data collected from slough 20 between June 24 -September 29, 1976. Water quality data collected from Willow Creek, Littfe Willow Creek, Kashwitna River and CasweJt Creek between July 21 and October: 12, 1976. Water quality data coflect~d from Sheep Creek 1 Goose Creek and Montana Creek between July 21 and October 12, 1976. Water quality data collected from Slough 3c and Chase Creek between June 26 and October 1, 1976. Water quality data collected from Fourth of July Creek, Gold Creek, Indian River and Portage Creek between July 17 and September 28, 1976. Daily maximum and minimum water temperatures in the Susitna River at Parks Highway Bridge, June 36 -October 26, 1976. Daily maximum and minimum water temperatures in the Susitna River above Chase Creek, June 21 -September 29, 1976. Daily maximum and minimum w;3ter temperatures in the Susitan River between DeviPs Canyon and Portage Creek 1 June 22 -Octohe!"' 30, 1976 .. Dajly maximum and minimum water temperatures in Birch Creek, June 26 -Dece~mber 2, 1976. Table 19: Table 20: Table 21: Table 22: Table 23: Table 24: Table 25: Table 26: Table 27: Table 28: Table· 29: Slough 8 cr~oss sections and stage gage inform- ation. Slough 10 eros!.~ sections and stage gag2 inform- ation. Slough 11 cross sections and stage gage inform- ation. Slough 13 cross sections and stage gage inform- ation. Slough 14 cross sections and stage gage inform- ation. Slough 15 cross sections and stage gage inform- ation. Slough 16 cross sections and stage gage inform- c ation. Slough 17 cross sections and stage gage inform-- ation. Slough 18 cross sections and stage gage inform· ation. Slough 19 cross sections and stage gage inform- ation. Slough 20 cross sections and stage gage inform- ation. I I I I . 4\1 .I I I I I I I I I I I I I •• ~. I I I I I I 1\ I I I _11 • I I I I I I I Table 30: Table 31: Table 32: Slough 3C cross sections and stage gage inform- ation. ....._ -~ .... •. ~-~ .!/ ·-.... ,; Chase Creek cross sections and stage gage information. Tributary flow data, 1976 .. Riis, James C. and Friese, Nancy V., 1978. Fisheries and Habitat Investigations of the Susitna River -A preliminary study of ,. potentiaJ impacts of the DeviPs Canyon and Watana ·Hydro- electric Projects. Alaska Department of Fish and Game, Division of Sport & Commerical Fish. 116 pp. Table 8: Table 10: Water quality data from selected tributaries to the Susitna River 1 · 1977. Water flows of Montana, Rabideux and Willow Creeks from May through Noyember, 1977. Table 11: Daily maximum and minimum water temperatures from the Susitna River at the Parks Highway Bridge, June 27 -October 12, 1977. Appendix II Table 2: Water quality data from sloughs and clearwater tributaries of the Susitna River•, June 14 October 5, 1977. Tab;e 3: DaiJ.y maximum and minimum vtater temperatures in Rabideux Creek, May 25 -October 23, 1977. Table 4: Table 5: Table 6; Daily maximum and minimum water temperatures in Montana Creek, May 25 -November 6 1 1.977. Water quality data from Rabideux Creek, May 25 -October 27, 1977. Water quality data from Montana Creek, Jur.e 7 - October 26 r 1977. I I I I. •• •• ,. II I I •• I I • I 'I :I I I I