Km. 



36K. Powder River 



183 



470 



None. 



Upper Powder and 

 N. Powder Rivers 

 and tributaries. 

 Eagle Creek. 



Irrigation, mining, and logging depleted 

 runs in main Powder R., but areas not 

 eliminated until Thief Valley Dam con- 

 structed in 1931. 



27 



36L. Burnt River 



125 



522 



None. 



Middle and upper 

 main Burnt R.. 

 North and South 

 Forks, and a few of 

 their tributaries. 



Residents reported large run many years 

 apo. Excessive irrigation, gold dredging, 

 and Unity Dam (without fish passage) 

 caused depletion. Taken from production 

 by Oxbow Dam. 



27 



36M. Welser River 



ni 



547 



None. 



Portions of main 

 Weiser R. and trib- 

 utaries. 



Small run until 1963 when it was de- 

 cided that fish passage was failing at 

 Brownlee Dam. Irrigation diversions 

 without screening and low flows reduced 

 runs before this. 



9, 27. (*) 



36N. Payette River 



lis 



571 



None. 



Main Payette R., 

 Squaw Cr., North, 

 Middle, and South 

 Forks. 



Many kilometers of excellent spawning 

 areas lost when dam blocked runs in 

 1914. Black Canyon Dam built later 

 took out most of remaining area. Much 

 depleted run will be cared for by hatch- 

 eries or diversion, ovving to passage fail- 

 ure at Brownlee Dam. 



27. (*) 



360. Malheur River 267 576 



36P. Boise River 122 606 



None. 



None. 



Upper Malheur R. 

 and tributaries. 



Throughout main 

 Boise R., North, 

 Middle, and South 

 Forks, and 

 Tributaries. 



Former large runs completely depleted 28 

 by irrigation dams and diversions. 



Good-sized runs more than 50 years ago. 28, (*) 

 Pollution and irrigation projects de- 

 stroyed all but small run that continued 

 until cut off in 1964. 



36Q. Owyhee River 



608 



Main Owyhee R. Former spawning area extended to head- 



and most waters; stream was known as good pro- 



tributaries, ducer of steelhead more than 50 years 



ago. Runs were depleted before con- 

 struction of Owyhee Dam in 1933. This 

 dam, 42 km. above mouth, does not 

 have a fishway. 



28 



36R. Bruneau River 



770 



None. 



Main Bruneau R. 

 and lower portions 

 of tributaries. 



Irrigation practices caused extinction of 28, (*) 

 runs. 



36S. Canyon Creek 

 36T. Malad River 



51 

 160 



888 



None. 

 None. 



Lower portion. 



Most of Malad R. 

 and Little Wood R. 



Small stream, now largely diverted for 28, (*) 

 irrigation. Once had small run. 



Numerous impassable irrigation dams 28. (*) 

 and unscreened diversions destroyed 

 former runs. 



36U. Salmon Falls 

 Creek 



36V. Rock Creek 



37. Yakima River 317 



38. Wenatchee River 



917 



952 



536 



749 



39. Entiat River 



83 



774 



None. 



None. 



Upper Yakima R., 

 pans of Naches R., 

 and Satus and Top- 

 pcnish Creeks. 



Throughout main 

 Wenatchee R., lower 

 Mission. Peshastin, 

 Icicle. Chiwaukim 

 and Nason Creeks, 

 Chiwawa, Little 

 Wenatchee, and 

 White Rivers. 



Entiat 

 Rivers. 



and Mad 



Lower portion. 



Lower portion. 



Formerly much more 

 extensive in 

 tributaries. 



About same as now. 



About same as now. 



In common with other streams of area, 

 irrigation projects were responsible for 

 depleting run. 



(*) 



Historical upper limit for steelhead trout 28, (*) 

 migration in Snake R. and longest mi- 

 gration (1.472 km.). No runs for many 

 years due to irrigation demands. 



Irrigation diversions and dams reduced 2 

 productive capacity. Has many excellent 

 spawning areas. 



Had good runs. Sport fishery takes 600 2, 13, 

 to 1,000. Grand Coulee salvage program 16, 18 

 moved fish into these streams. Because 

 this fish is difficult to see during high 

 water, exact spawning areas are un- 

 known. 



Former good runs were depleted but later 2, 13, 

 augmented by introduction of fish during 16 

 Grand Coulee program. Entiat National 

 Fish Hatchery rears part of run. 



Sea footnotes at end of table. 



10 



