fish. Although it would probably have been possible to trap the adult 

 fish below the dam and release them above itj, there are no meaas knOwa 

 at present to provide for collecting and passing the downstream migra-'l^ 

 ing fingerlings from above the dam without almost certain death to alio 

 Therefore, from 1939 to 1943 all adult salmon were trapped e.x Tlook 

 Island Dam and placed in the Wenatcheej Entiat, Methow and Okanogan 

 Rivers, which enter the main Coliaiibia below Grand Coulee Damo 1^ 

 Later, part of the runs were taken to hatcheries constri;icted on 

 these streams o Marked fish experiments and field observations 

 have subseouently vindicated the belief that, with few exceptions, 

 the offspring of these transplanted fish hs.ve returned to the foster 

 streams into which they had been transferred o Most of these riins now 

 show increases o In order to protect the runs until they could become 

 well established, the Washington State Department of Fisheries ms.de 

 it unlawful to take food fish or salmon in any of the tributaries uf 

 the Colimibia River above Rock Island Dam,, and the State Game r)?pe.rt= 

 ment prohibited the taking of steelhead over 16 inches ir. length i';: 

 the Wena tehee, Entiat and Methow Rivers o 



The McNary or Umatilla Dam, which is now under construction, is 

 located just above the Una ti 11a Rapids in the Columbia River &t 

 approximately 292 miles above its mouth and 91 miles above Celilo 

 Falls, and will be an 87 foot high barrier to fisho Tfhile it will 

 be provided with fish ladders, its effect on fish is difficult to 

 predict, for two or three barriers may have an accumulative adverse 

 effect on fish that is considerably greater than two or three times 

 the obsei^ed adverse effect of a single dam or barrier of similar 

 height and typeo It is therefore desirable that no further objh 

 building will be undertaken on the main traveled routes of fish in 

 the Columbia River System until the irrigation and power facilities 

 at present installations and at sites above Grand Coulee Dam Are f"ully 

 developed and utilized. 



There are several more dams which are being considered by tLe 

 construction agencies for the main Columbia in this Area© The Dalies 

 Dam would be located just above the city of The Dalles, Oregpn, would 

 be about 88 feet in height, and would flood out Celilo Falls o fa^ 

 John Day Dam would be located just below the mouth of the John Day 

 River, and would be approximately 50 feet higho The Arlington Dam 

 would be located just above the town of Arlington, Oregon, and would 

 be 48 feet high. These three dams are expected to be provided with 

 fishways if they are constructed© A new dam is proposed at Priest 

 Rapids, and the latest announced plans suggest a 200 fost I'dgh mciltiple- 

 purpose dam at this site.. AS this dam will be too high for existing 

 typds of fishways, and will therefore be a complete barrier to all fish, 

 it will eliminate all of the known production areas for bluebaok salmon 



l/ A Report upon the Grand Coulee Fish=Maintenance Project i939"1947 

 by P. Fo Fish and Mo G. Hanavan, Fish and Wildlife Serrioe, Special 

 Scientific Report NOo 55 (processed). 



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