S TRIMA RY OF RECO4?4Ni)1T IOfl Mthods of incrain the production of anrdroous fishes in the Oregon tributaries of the Coiuibia nnd 5mo Rivers above and including the Uti1ia River have bzon rccornendcd under ech river cytsm in the preceding sections of this report. The following lint swnrnarizos the rccormndcd projects ss outlined in the variowi coctiono of this report in what i considered to be the order of importance. Provide fish pago at }thnm Falle (WaN-i) and the rernnant splash darn (WaM-2) on the Mins River, Investigate all unocroenod diversion ditchon (Wa-i) on the Wallowa River below Joseph (to Dry Creek) to determine fish loss, and screen where necessary. Attempt to establish fall chinook salmon in designated areas of the Waliowa, lower Lostins, and lower Imnaha Rivers. Conduct study program for rocetabliehing blueback salmon in Wallowa Lako as roco ended on page A-65 of Acquire Sanderuon's Springs area on Spring Creek (tributary to Willow Crook of Upper Grando Rondo River) for fish-cultural pu.rposes. Provide transplantation flo Wallowa River below Joseph, in low flow area (Wa-4) of the Cons ider development of off-channel ipoundents on the Imrrnha River and off-channel or in-.chrnne]. bpoundents on Lick Creek (Big Sheep Creek tributary) for euppl entalrearing purposce. ConsIder dovelopnsnt of off.channel impoundments on Walicra, Lost ins, and Ninam Rivers for suppleisntal roaring purposes. Investigate all issned diversion ditches (u-li. through TJ-25) on the flt.tlla Rlvsr whIch take water before the end of June for fish loss, and screen where ceary. The Mewell and West Extension diversions are co idared to be in definite need of creonIng. Investigate all unscresned diversion ditches (WW-1, WW-2, WW-Sf-1, and WJ-Nf-1) on the giin eila Wcila Rivor and its North and South Forks to detornine fish ices, an1 screen where necessary. Pro;ide functional fish passage facilities at the LostIn water eupply din (WaL-2) and Sheep Ridge diversion dam (WaL-3). Consider dcveloprsnt of off-channel inpoundments and/or a hatchery on the Lookingglacs Crcez systcn. Attenpt to establish fall chinook and silver salmon In designated areas of the Wenaha River drainage. Attept to establish fall chinook &thion in designated areas of the Ninam and loier Grande Roads Rivers. 15. Attempt to ostabthth tall chinook and/or silver salmon in areas of lower Big Sbecp and Joseph Crocks. 36. designated Assure fish passage at two dosignated low dame (I.-13s-2) on Big Sheep Creek if introduction of fall chinook and/or silver salmon is attempted. Assure fish passage at designated (LGR-J-1) if introduëtion of fall attempted. diversion dams on Jooph Creek chinook and/or silver salmon is Consider use of sill logs to improve spawning and rearing environment in designated areas on the Walla Wal]a end Minam R1ver and on Big Sheep, Little Sheep, Horse, Lightning, Big Canyon, and Bear Creeks. If natural increase does not occur, promote an increase in size of populations by suggoted methods in order that sufficient donor stocks will provided for other parts of the Waflowa River silver salmon area. Undertake the exporimnta). transplantation of the last portion of the or fry from these fish) from Oxbow Dam to Pine Creek and provide increased flows for fish life, if poiblo. fall chinook run (or egg3 Consider impervious low flow channel in dry section (w..4) of Wulla Walla River, or diversion of fish through Little W'll Walls River, to provide tranportaton flows for spring chinook salm.'n. Attempt to introduce spring chinook i1n into South Fork Walla Walla River by suggested methods if transportation flows are obtained. 23, Provide fish passage facilities at the Hudson Bay (WW-5), Centennial Mill Dam (WW.-7), and Little Wallu Walla (WW-6) Irrig'tion Company on the Walia Walla River. dair Provide improved fIsh passage couditlons at the Three-M]e (U2), Pacific Power and Light Company (W-3), and Cold Springe (U7) di'rrs ion dams on the Umatilla River. Provide increased fall and winter flowz on the Umtilia Rlvor below Pendleton to create spawning :&reas for fall chinook salmon as possible compensation for loss of Columbia RIvr :ipaming grounds in the area of the John Day Dtn pool. Cons ider deveiopient of offci'uinne1 iinpounthnerits on Catherine Creek for supplemontal rearing purpouGs. Investigate all unscreened diversion ditches (P_4, P..C-2, and P-EP4) on the Pine Crock drainage to detrmine fish loss, and screen where necessary. Attenpt to establish spring chInook in Wct Eagle Crook and supplement spring chinook production in upper maIn Esgie Creek following suggested methods. Consider use of impoundment areas and establishment of a drip incubator station. Remove designated log jams (Po-F1, 3, and 4; and Po-EWE.-2--4) on Eagle Creek drainage -426-- Investigate all unscrooned diverion ditchoo (WaL-4, WaB-2, WaH-1, WoBi-1, and WaP-l) on the Loctino River and Boor, Hurricane, Big Canyon, and the lower 2 miles of Prairie Creek to doternine fish 1os, and screen whore necessary. Investigate all unecreoned diversion ditches (I-S-i, I-C1, I-BS..l, and I-BSLS-l) on Sumxnit and Cow Creeks (Imnaha drainage), Big Sheep Crook, and Little Sheep Crook to determine fish loss, and screen where necessary. Attempt to establish fafl chinook salmon in designated areas of the upper Grando Rondo River. Consider stream shading in designated areas of the upper Grande Rondo River by use of bank plantings to reduco summer temperatures. Consider development of off-channel for supplemental rearing purposes. spowidmsnta on Big Sheep Creek Remove log and debris jams (I-BSC-l) and (I-BSLS-2) on Big Sheep Creek drainage. Investigate all unseroened diversion ditches (LGR-J-2) on Joseph creek to determine fish loss, and screen whore necessary. RemoVe designated debris jams and beaver dams in the upper Grande Rondo drainage on Fly Creek (UGR-F-i and TJGR-F-2), Indian Crock (UGR-I-],), Phillips Crook (uGt-P-l), Gordon Crook (UGR..G-l), Cabin Creek (uGR-cb.1 and UGR-Cb-2), and, under specified conditions, Spring Crook. 3. Consider the ostabliabrnt of silver sabon in Hurricane, Boar, Big. Canyon, aiid lower Prairie Creeks of the Wa].lo'aa River sytom; Little Sheep, Camp, Horse, and Lightning Creeks of the Innaha River system; and Spring, Indian, awl Clark Creeks of the uppsr Grands Rondo drainage fol1oiing suggsstd othode. Assure fish passage at tro designated lou' dams (WaH-4) on Hurricane Crook if introduction of sth'or salmon is attempted. Investigate all un oroenod diversion ditches (Po-EK-]., Po-EEE-1, and Po-EWE-5), on Eajle Coek to determine fish lose, and screen whore necessary. 4]., Assure fish passage at Phillips ditch dam (Po-EWE-l) on West Eagle Creek. Invcstigato unscroened diversion ditches (UGR-Ca5 and UGR-Ca6) on Catherine Creek to dot ilno fish loss, and screen whore necessary. Screen opn ditches (Wa-5) on the Wallou'a River between Wallowa Lake and Joseph if lntk'cduction of blurbacic and/or silver salmon is successful. Invoetigito uwcreenod diverulori ditchc,s (UGFtP-3, UGrt-.I-3, UGFt-G-2, UGR-Cb-4, and UGR-WS-3) on PhUh1p, Indirin, Gordon, Cabin, and Spring Creeks on the upper Grande Ronde River to determine fish 1oi3, and ecroon where necessary. Looaon streambod rriterial by mechanical moans to remove silt and increase percolation in a designated area of Big Sheep Crook. Consider the dovolopinernt of off-channel impoundment o.rea on Little Sheep and Camp Crocks if the introduction of silver salxnon is attempted. Assure fish passage at designated dams (UGR-2 and UGR-3) on the upper Grando Ronde River dra.inag. ConsIder stream shading in designated areas of Catherine Crook by use of 8treaxnbank plantings. Remove designated debris jzrs (LGR$S-l) on Swamp Crook. Remove designated dobris jams (LGa-WI-1) on Wildcat Crook in the lower Grando Rondo River drainage, on the Wonaha River drainage (LGR-WNF-1 and LGR-W14-1), and on upper Lookingglass Creek (UGR-L-2 and UGR-L-3). Inostigato unsereoned diversion ditches (Po-l) on the lower Powder River to doterine fish loss, and screen whore necessary. 52, InvestIgate Eagle Falls (Po-2) on Eagle creek to determine If a partial barrier exists, Install dcflaetore on the lower Wonaha River on an experimental basis to create additional pool area. Consider Inestigntion on upper Bear Creek for hoadwator storage to obtain water spcifieally far fish life by alleviating low flow conditIon.. ConsIder the establishment of steeihoad on upper Prairie Crook following suggos ted methods. If introduction of stecihoad i attempted, Inveotiato unscreenod diversion ditches (WaP-2) on upper Prairie Creek to determine fish 1os, and screen where nssary. ACKNCILEDGMENTS Acknow1edgcnt is extended to prsonno]. of the U. S. Geological Survey, at La Grando, Oregon, for their a istanoc in furnishing infornation concerning streane In the study area. Acknowlcdgnent is also made to personae]. of the Oregon Geo Coniesion, eepecially those of Region 4, for providing information coniorning the fish populatione and stre of Eastern Surface Water Branch Oregon. The authors wish to thank Mrs. Joanne Ainec, and Messrs. Roger Slaby and Dolbert Ranks for Inking the nurous graphs and naps and Mrs Pauline Prickott for typing approximately 1,200 pages of text and tables for the rough drafts and final copy of this report, The planning and early phases of the progran were under the direction and supervision of Dr. George Y. Harry, Jr. and Mr. Robert W. Schoning, then Director and A-sistant Director of Research, and Mr. Ernest R, Jeffrics, then project lender for the Co1wbia River Fifrry Dcve1opmnt Progran. Mr. Rziyiond A, WilliS bae project leader in October 1958 and roviecd the rough drafte, ron dyed editorial cc'ents, end supervised the coepilatlon of the final manuscript. Appreciation is extended to Musars. SIgrd J. W trhe'isi and Jack N. Van HynlrAg, Director and Assistant Director of Research, respectively, for reviewing and editing the final report. LITERP.TUiIE CI1 Brett, J. R. Temperature tolerance in young Pacific salnion, genus Jour. Fish. Roe, Bd. Can., Vo].. 9, No. 6, pp. 265-323. 1952, Bryan, K. 1929. Geology of reservoir and darn sites with a report on the Owyhee irrigation project, Oregon. U. S. Geol. Surv., Water Supply Paper 597-A, 92 pp. Burner, Clifford 3. 1951. Chwactoristics of spaming nest8 of Co].uinbia River salmon. Fish and Wildlife Serv,, Fish, Bull. No. 6]., 110 pp. U. S. Columbia Basin Inter-Agency Committee 1957. Part II. Inventory of streane and proposed improvements for development of the fishery resources of the upper Columbia River basin. Fisheries Steering Coin. CBIAC, 100 pp. French, Robert R. and Roy 3, Wahie 1959. Biology of chinook and bluhek s1non and stecihead in the Wanatchoc River system. U. S. Fish and Wildlife Serv., Spec. Sd, Rep.: Fish, No, 301+, 17 pp. Gangerk, Harold A, and R. D 1956. Further observations on strasni survival of king a1mon spWn, Calif. Fih and Game, Vol. 42, No. 1, pp. 37-49. Gangmark, Herold A, and Bakkale 1958, Plastic standpipo for sampling strcambed envfronxnent of sa1non spnm. U. S. Fish and Wildlife Sort., Spec. Sd, Rep.: Fish. No. 261, 20 pp. Hogonson, G. 11. 1957. Golog. and ground water resources of the Umati11a River basin area, Oregon. U. S. Geol. Surv., Open File Rep., 100 pp. Newoomb, R, C. 1951. Preliminary report on the ground water resources of the Walla Ualla U. S. Gaol, 3urv., Unpub. report. bamn, Washingon ntd Oregon. Nielson, Reed S. 1950. Survey of the Columbia River and its tributaries, Part V. Fish and Wildlife Serv., Spec. Sd. Rep.: Fish. No. 3, 41 U, S. pp. Literature Cited (continued) Pardoe, J. I. and D. F. Hewitt 1914. Oreg. Geology and mineral resources of the Sumpter quzLdrangle. Bur. of Mines and Geol., Mm. Res. of Crag., Vol. 3, No, 6. Parkhurst, Zdll B, 1950a. Survey of the Columbia River and it& tributaries. Part VI. Fish and Wildlife Serv., Spec. Sd. Rep.: Fish. No. 39, 58 U. S. pp. 1950b. Survey of the Columbia River and its tributaries. Part VII. U. S. Fish. No. 40, 95 pp. Fish and Wildlife Serv., Spec. Sci. Rep. 195Cc. Survey of the Columbia River and its tributaries. Part VIII. U. S. Fish and Wildlife Serv., Spec. Sd. Rep.: Fish. No. 57, 19 pp. Rulifeon, R. L. and E. R. Joffrioc 1953. Unpublished notes. Fish Comm. Orog. Rea.Diviion. Stout, Wendell H. 195?. Stream surveys and fish relocation feasibility studios, Mountain Sheep and Pleacant Valley Dams. Oreg. State Game Comm., 125 pp. Thompson, Robert N., Janes B. Huas, Lawrence 1958. M. Woodall, and Edwin K. Holmberg Results of a tagging proram to enunorate the numbers and to determine the seasontl occurenco of anadromous fish in the Snake River and 1t tributaries. Finh Comm, Oreg., Dittoed rep, 202 pp. U. S. Hureau of Recleiat1on 1947. Tho Columbia River, 399 pp. U. S. Departncnt of Commerce 1957. C1inrtic nry of the United States. 1952. U. S. Weather Bureau, 70 pp. Supplesient for 1933. through U. S. Fish and Wildlife Service 1957. A detailed report on fish and wildlife resources affected by the proposed upper Owyhee project, Duncan Ferry and Jordan creek developments. Bur. of Sport Fish. and Wildlife, 20 pp. 1958a. A proess report on air and water temperature studios, 1954-56, Middle Snake River drainage, 100 pp. 1958b. A progress report on air and water teperaturo studies for 1957, Middle Snake drainage. 120 pp. Literature Cited (continued) U. S. Geological Survey 1956. Compilation of records of surface waters of the United States through September 1950, Part 13, Snake River basin. U. S. Geol. Surv., Water Supply Paper 1317, 566 pp. 1943-1959. Surface water supply of the United States, Snake River basin. 1957, Pert 13, U, S. Gaol. Surv., Water Supply Papers, Nos. 983, 1043, 1063, 1093, 1123, 1153, 1183, 1217, 1247, 1287, 1347, 1397, 1447, 1517, 1567. APPENDiX A A STUDY OF SOME OF THE FACTORS ASSOCIATED WITH THE REESTABLISHMENT OF BLUEBACK SALMON (Oncorhynchus nerka) INTO THE UPPER WALLOWA RIVER SYSTEM 1/ Richard C. Toner March 1960 / Now with the Bureau of Conmeroia1 Fisheries, Massachusetts. TABLE OF CONTENTS Page INTRODUCTION A-? SURVEY OF LITERATURE AND UNPUBLISHED INFOF(MTION ON WALLOWA LAKE BLUEBACK SALMON A-S PHYSICAL SURVEY OF STUDY AREA A-iC) Physical Description of Wallowa Lake A.40 Storage Capacity and Lake Fluctuations Al2 Spawning Area in Lake Physical Description., of the Wallowa River Above A15 and Below the Lake River Above River the Lake A15 Below the Lake A-iS Darn to the Wilson Ditch A.48 Wilson Ditch to Ruesol iano A18 Russel Lane to Dorrance Lane Dorrance A18 "Market "Market Road" to Enterprise A..l8 Enterprise to Rock A18 Water Teznpratures in Study Area A...18 Water Flow in Study Area A26 Irrigation Diversions in Barriers in A-30 Study Area Study Area Wallowa Lake Darn A-30 , A30 Consolidated Ditch Darn A33 Low Flow Area and Possible Pollution Below Miller Pond Ditch Darn A33 Log and Debris Jaxns A-33 TABLE OF CONTENTS (continued) Page WATER RIGHTS IN STUDY AREA A-33 Wallowa River Water Rights From the Dam to Hurricane Creek TRAPPING DOWNSTREAM MIGRANTS A-39 Description and Function of Fish Traps A-40 Fish Catch A-40 FEASIBILITY OF REESTABLISHING BLUEBACK SALMON IN WALl/idA LAKE A-43 Successful Donor Stock A- Screen Diversion Ditches A-44 gment Summer Stream Flows A- Ladder Diversion Dame A-44 Egg-Taking and Incubation A-44 Surmnarv A-45 RECOMMENDED PROGRAM A-45 LITERATURE CITED A-46 LIST OF APPENDIX FIGURES Page Appendix Figure Wallows Lake Looking South from Hill at Lower End A-il Wallows Lake Dam and Forebay A-li Yearly Maximum Wallows Lake Gauge Readings, 1937-59 £43 Topographic Map of Wallows Lake 6 Key Map of Study Area, Wallows River Above Wallows Lake to the Mouth of Rock Creek A-16 Map of Area South of Wallows Lake A-i? Map of Wallows River Fiton Lake to 3 Miles Below Enterprise .... A49 Map of Wallows River From 4,5 Miles Above Lostine to 0.25 Mile Above Wallows A.20 Map of Wallows River 025 Mile Above Wallows to 75 Miles Below Wallows A21 Biweekly Observations of Maximum, Minimum, and Mean Wallows River Temperatures Taken 0.75 Mile Above Wallows Lake, June Through September 1959 A23 Biweekly Observations of Maximum, Minimum, and Mean Wallows Lake Temperatures, Taken 1.5 Feet Below Forebay Level at Wallows Lake Dam, June Through. September 1959. A-24 Biweekly Observations of Maximiun, Minimum and Mean Wallows River Temperatures Taken Near Enterprise, June Through September 1959. A..25 Daily Discharge in Cubic Feet per Secod from Wallows Lake into Wallows River During the Irrigation Season, May Through September 1959 A-27 Monthly Discharge in Acre-feet in the Wallows River and Silver Lake, Farmers, and Consolidated Ditches During the Irrigation Season, May Through September 1959 A-28 Daily Discharge in Cubic Feet per Second from Wallows Lake Into Consolidated, Farmers, and Silver Lake Ditches During the Irrigation Season, May - September 1959 A-29 Silver Lake Ditch Flume on Left With Wallows River on Right and Dam in Background A32 A-4 LIST OF APPENDIX FIGURES (continued) AipetdI,t Page Figure 17. Farmers Ditch Intake on Right and Wallowa River on Left 1. Wallowa River in Foreground Entering Consolidated Ditch on Right Side of Photograph Cross Valley Canal Near Lostine, Oregon..........,........,.... A-32 A-32 A-32 W11owa River Below the Miller Pond Ditch Dam on August 17, 1959. At Left is Miller Pond Ditch Wooden Flume 1.4afer Returning to the Wallowa River in Foreground From the Mt. Emily Lumber Company Log Pond in Background A-34 Top View of Trap Showing Trap Box, Apron, and Wing A-41 Side View of Trap Showing Wing, Trap Box, and A-41 Trap in Farmers Ditch Flume A41 Lcngth-Frequency Distribution of Mackinaw and Rainbow Trout Trapped in Farmers and Silver Lake Ditches, MayAugust, 1959 A-42 S LIST OF' APPENDIX TABLES Appendix Table Page Spot-Temperature Data for the Wallowa River Between l4allowa Lake and Enterprise for August, 1959 A-22 List of Unscreened Diversions in Wallowa River System Between Wallowa Lake and Rock Creek as of the Summer of 1959 A-31 The Wallowa River Water Rights of Companies and Individuals From the Wallowa Lake Darn to Hurricane Creek A-35 The Combined Catches for the Silver Lake and Farmers Ditch Traps From May- 25 to August 31, 1959....................... A-43 INTRODUCTION S Eastern Oregon historical notes pertaining to the turn of the 19th century refor to Wallowa Lake as the favorite spawning ground for the Columbia River nerka) in Oregon. With the pioneering of white blueback salmon settlers to this area around 1875, and the utilizatIon of the Wa].lowr River for irrigation purposes, the species declined in abundance due to unscreened diversions which trapped large numbers of juvenile migrants. Later, development of the agricultural economy necessitated Impoundment of storage water in Wal1ow Lake and a darn constructed in 1916 for this purpose completely blocked the blueback from their spawning grounds and exterminated the rmnaInIng portions of the runs. The Fish Commission of Oregon has seriously considered the possibility of reestablishing the blueback run in the Wallowa System for a number of years, and since 1955 several preliminary investigations and brief reports have been coinpleted. The present study was Initiated in May of 1959 and, although only designed to utilize the services of one biologist for a six month period, marked the first time that more than a very brief investigation was made. The study extended from Nay through September of 1959 and was directed toward the following objectives: 1. Survey of literature and unpublished information concerning past productivity and future salmon-rearing potential of Waliowa Lake. 2. Physical Survey of study area. a. Physical Description of Waflowa Lake. b Physical Description of the Wailowa River above and below the lake. Water temperatures. Water flows. Irrigation diversions. River barriers. 3. To determine water rights (amounts of water for withdrawal) in the study area. 4. irrigation To trap downstream migrants immediately below the dam in reLative abundance. ditches and to determine species and 5. in To explore the feasibility of reestab1ihing blueback salmon Wallowa Lake. 6. deemed feasible, for reestablishing To recommend a program, blueback salmon in Wallowa Lake. if SURVEY OF LITERATURE AND UNPUBLISHED INFORMATION ON WALLOWA LAKE BLUEI3ACKS Some people remain in the Wallowa Valley who can recall the past great runs of the bluoback salmon; i.e. people who entered the valley prior to 1900. Among these are Mr. and Mrs. Jay Dobbins, Mr. Max Wilson, Mr. Wilbur Roman and Mr. Jasper Prout, all of whom provided first hand accounts of the early runs. Duo to its seclusion and isolation the Wallowa Valley was relatively late in developing into a cattle and sheep range. The Nez Perce Indians were the first to exploit the bluebacks and other salmon in the Wallowa River (in fact, the word "Wallowa" means "fish trap" in the Indian language), Mr. Nib Murray of Enterprise states that the Indians caught salmon in large numbers, dried them on the shore of Wallowa Lake, and buried them in the fall to be dug up in early spring when the Indians returned to this area and were short of food. Mr. Jay Dobbin was one of the early settlers in the valley, arriving in 1892 and establishing permanent residence in 1894. He remembers James McCall, who established a cannery at the head of Waliowa Lake prior to 1894. This cannery was in operation for 4 or 5 years. Mr. McCall salted the salmon and packed them in barrels for sale in eastern Oregon towns. With the use of the Wallowa River for irrigation, young salmon migrants were diverted into farmers' fields by the unscreened irrigation ditches, The first information pertaining to unscreoned ditches appears on page 21 of the 1890 report of the State Board of Fish Commissioners: "Another complaint was made by the people in that part of the State, and we find it general where irrigating ditches are in use, that during April and May, when the streams are full of water, a great many young fish of all species, as they are descending the stream, are run into these ditches and carried out on the farms and left to perish. A law should be enacted requiring the owners of all ditches, both for mining and irrigating purposes, to put a screen of fine wire netting across the mouth of all such ditches where water is taken from a stream inhabited by fish, and to keep it there during the months of April, May and Juno. This will not be a hardship to anyone, as but little water is used during these months, and the screens can be arranged as to interfere very little with the flow of water." Hollister' D. McGuire, Protector (this title .tas later changed to Master Fish Warden), supplies informaUon on past blueback runs on page 53 of his Annual Report of 1895 in commenting on the need for screens in irrigation ditches: "I earnestly recommend that provision be made in our fish laws requiring all persons and corporations owning in whole, or in part, any mill race, irrigating ditch, or canal, taking or receiving its waters from any river, creek, stream, or lake in which food fish exist, to provide and maintain over the inlet of such streams, a wire screen of such construction, firmness, strength, and quality, as shall prevent fish from entering such canal or mill race, when required to do so by the fish and game protector. My attention wa called to the necesity of such a law through a letter from Professor Gilbart of Stanford University some two years ago. There is no doubt that many thousand chinook and blueback salmon are annually destroyed in this state by being carried out into unscreened irrigating ditches; especially Is this true of Wellowa River and Lake. These waters are natural spawnIng grounds for the chinook and the only stream in Oregon to which the blueback resort for spawning. Through personal investIg tion of this matter, I am satisfied that Professor Gilbert's statement that 'Many thousand young fish annually perish by passing out into the irrigating fields,' is a conservative statement of the loss sustained by the fshories because of the neglect of the state to provide a screen law. I append Professor Gilbert's letter:'ZOOLOGICAL LABRATORY, LELAND STANFORD JUNIOR UNIVERSITY, STANFORD UNIVERSITY, CALIFORNIA, March 23, 1895. Mr. H. D. l4cGuIre, Portland, Oregon-U- I have just read with much interest your report to the governor Dear Sir: and venture to call your attention to a very important violation of the law not there discussed. I refer to the failure on the part of ditch owners to provide suitable screens for the head of the ditch. I found last summer that the Wallowa River is the most important natural spawning ground for chinooks which I have yet examined. It is also the only stream In Oregon affording spawning beds (Wallowa Lake and Tributaries) for the blueback. Yet the ditches are for the most part unscreened, and many thousand young fish annually perish by passing out into the irrigated fields. Yours truly, C. H. GILBERT' " Finally, H. G. VanDusen, Master Fish Warden, in commenting on habits of salmon on page 13? and 133 of a 1904 report furnishes his observe tions on the demise of the bluebacks due to unscreened ditches. "It is plain that salmon are very peculiar in regard to certain in a great measure, for streams, and that each particuler species spawning purposes, the waters of its infancy The Blueback salmon of the Cclumbia are also very peculiar in this respect and each particular tribe seeks the waters of its nativity to spawn, and when once that particular tribe becomes extinct their old familiar spawning grounds become forsaken. In this State we have had this demonstrated very clearly at Waliowa Lake which in the early days, with its vast body of clear, cold water and extensive spawning grounds at the head of the lake, was sought after every year by these little salmon in innumerable ninbors for spawning purposes, while now that distinct family has become almost extinct, owing principally to the destruction of the young salmon in being led off into the fields through the irrigattng ditches while on their way to the sea, and the lake has become completely depleted." It is interesting to note that this is the first instance in which an authority speaks of the blueback salmon being almost extinct In this state and Wallowa small fracticn Lake being completely depleted. The run that remained was a very not quite the case as first hand of past runs, but "completely depleted" was secretary of an irrigation ax Wilson, (a accounts from resIdents indicate. Nr. Game Commissioner), recalls sightings of individcompany - also an Oregon State River, approxibuilt across the Wallowa ual bluehacks until 1905 when a dam was 1905 and inatelv 0,75 mile below the town of Minam. The darn was constructed in of Fisheries as a part of early enlarged in 1906 by the Oregon State Departirent A-9 artificial propagation activities. Prior activities were conducted in 1901 and 1902 in the Grande Ronde and Wenaha Rivers near Troy, Oregon. Detailed aCcounts of the early operations are discussed in early Annual Reports of the Department of Fisheries of the State of Oregon. Mr. Dave Rich (a long-time resident), remembers 1917 as the year he saw a small school of adult bluebacks migrating upriver near Enterprise. Mrs. Dobbins remembers the year 1920 as the last time juveniles showed up in It was the year she was the president of a women's club the irrigation ditches. and at a meeting at her house she promised the ladies a trout dinner. Unable to get anyone to catch trout, she obtained 500 or so migrating blueback salmon, up to 7 inches long, in her irrigation ditch for the dinner. She remembers these as difficult to obtain even at that time. She recalls seeing very few after 1920. Although the blueback salmon stocks were practically eliminated as early as 1905 by the white man's irrigation and dam building practices, it is believed that small numbers of adults frequented the Wallowa Lake spawning ground up until 1916. Since that time, no investigations into the possibility of a restoration program were known of until recent years when several preliminary surveys were made by the Research Division of the Oregon Fish Commission. The reports, all unpublished resulting from these surveys are listed as follows: Wallowa Lake Survey (1955). Wal].àwa River Survey (1955). Preliminary Report. Wallowa Lake Blueback Salmon Rehabilitation Project (1957). Preliminary Report No. 2 Wallowa Lake I3lueback Salmon Rehabilitation Project (1958). While the above reports are of a cursory nature they primarily identified certain problems concerned with an attempt to reestablish the former blueback runs into the Wallowa system and information hasbeen used from the above reports. PHYSICAL SURVEY OF STUDY AREA The survey area consisted primarily of Wallowa Lake and 31 miles of the Wallowa River from the dam at the lake's outlet downstream to Rock Creek, below considered in the the town of Waflowa. The river and forks above the lake were survey area because of their potential value as spawning grounds for salmon. Physical Description of Wa iowa Lake Wallowa Lake (Figure 1) was formed by a damming action of a glacial drift, approximately one million years ago. The easterly and westerly shores are examples of lateral moraines and the northern boundary of the lake, a terminal to a maximum of 1,200 feet moraine. The east and west literal moraines eitend is 283 feet and was The maximum known lake depth from lake bottom to crest. The recorded by Professor W. D. Smith of the University of Oregon in 1927. at full surface area of the lake is approximately 1,600 acres and the elevation outlake level is 4,382 feet above sea level. Below the terminal moraine, an wash plain extends beyond the town of Joseph to the north. Storage Capacity and Lake Fluctuations outlet of The concrete dam constructed in 1916 and rebuilt in 1929 at the Wallowa Lake (Figure 2) has made the lake a storage reservoir with a capacity A-lO FIgure 1. Wallowa Lake Looking South from Hill at Lower End. Figure 2. Wallowa Lake Darn and Forebay. Ali of 42,750 acre-feet4/ Previous records show a low point at 3.4 feet gauge height in the outlet channel 100 yards above the dam. However, measurezrents made in the sumaer of 1959 show a 4.0 foot differential. Therefore, 6,187 acts-feet of water cannot be removed fron the lake unless the channel is dredged. This leaves 36,563 acre-feet of water which can be removed from the lake. The most significant fact concerning the yearly maximum gauge readings (Figure 3) is the number of times the lake has spilled over the dam since 1956 when the Pacific Power and Light Company generating station in Joseph became permanently inactive in July 1956 after having been struck by lightning. Thompson (1958) points out that the probability for a full reservoir every year is now greatly increased. The records during the storage season (October to April) for the period from October 1950 to April 1954 show that the power plant used an average of approximately 15,000 acre-feet per storage season. This is 35% of the total storage capacity of the lake and 41% of the present usable storage. The overflow in the 3 years since 1956 is indicative of the greatly increased probability for filling the reservoir each year. With the melting of snow in the mountains, storage water accumulates in May June, and July. Maximum gauge reading at the dam from 1937 to 1959 show that 50 per cent of these readings occurred in the month of July. It should be noted that the farmers cut hay about July 1, which results in limited irrigation and may influence the number of high readings in July. Gauge readings for the three years since the deactivation of the Pacific Power and Light Coirpany's generating plant in Joseph, show that maximum storage capacity was obtained in Nay and June during the years 1956-59. More pronounced over the past 23 years is that 60 per cent of the low readings Twenty-two per cent of the occurred between September 25 and October readings occurred in late August and September. Minimum lake levels have ranged (21,880 between 11.85 gauge height (18,460 acre-feet) and 14.00 gauge height acre-feet) since the deactivation of tl-e Pacific Power and Light Company's generating plent in Joseph. The major portion of the agricultural irrigation season is between May 1 and October 1. 2. 2/ Spawning Area in Lake Only limited spawning area in the lake is believed available due to the gravel. extremely steep banks of the moraines (Figure 4) and silting of the reported a few Fish Coinniission personnel in making observations in January 1958 Obsershoal areas, but they contained unsuitable gravel and were silt covered. A volunteer vations during the present survey concur with those made in 1958. in the southand 18, 1959, 15 underwater diver took bottom samples on October south of the eastern area of the lake and on Conley's Bar approximately 1 mile 10, 20, 30, and 70 dam on the east side of the lake. The samples were taken at It is reported that one heavily silted. feet and all samples were found to be by section in the northwest corner of the lake was utilized as a spawning area fall of kokanee (Oncorhynchus nerka kennerivi, landlocked blueback) during the A sport fishery exist for this species in Wallowa Lake. 1958. The first dam to be / Capaclty Table from State Engineers Office (1934). Lake was built in 1905 but was reported constructed at the outlet of Wallowa to have been passable to blueback salmon. 2/ and blueback spawning These dates roughly coincide with the peaks of chinook 1900's. in the lower Wallowa River as recorded in the early A-l2