WAHLE ET AL,. 1960-63 BROOD HATCHERY-REARED SOCKEYE SALMON 



Scale in kilometers 



Figure 2. — Portion of Columbia River Basin showing areas of past and present importance to sockeye salmon as described in t*xt. 



River run was being produced in the Arrow Lakes 

 area (Fulton 1970). 



The Grand Coulee Fish-Maintenance Project 

 (Fish and Hanavan 1948) began in 1933. Under 

 this project, obstructions were removed, dams 

 were provided with passage facilities, and irriga- 



tion diversions were screened. These measures 

 were necessary to establish suitable habitat for 

 the relocated runs in tributaries between Grand 

 Coulee and Rock Island Dams. 



To reintroduce sockeye salmon to the spawning 

 areas above Lake Wenatchee and provide eggs for 



231 



