FISHERY BULLETIN VOL 77. NO 1 



N 



"J' 



LAKE 

 WENATCHEE 



N 6 T N 



OREGON 



ONNEVILLE 

 /DAM \ 



VTHE DALLES DAM 



VICINITY MAP 



MIGRANT' 

 TRAP 



«l^ 



E« 



I 



LEAVENWORTH 

 HATCHERY 



ROCKY REACH 

 DAM 



16 



32 



1 KILOMETERS 



ROCK ISLAND 

 DAM 



Figure 3. — The Wenatchee River system and location of Leavenworth National Fish Hatchery. 



Leavenworth Hatchery, adult fish were trapped 

 from 1939 through 1943 at Rock Island Dam on 

 the main Columbia. Because the proposed hatch- 

 eries would not be available to handle fish until 

 1940, adults of all displaced species were released 

 for natural spawning in predetermined locations. 



Separate areas were selected for each species to 

 prevent overcrowding and mixing. Most of the 

 sockeye salmon transplanted undoubtedly origi- 

 nated in the Arrow Lakes, but fish from the 

 Okanogan and Wenatchee systems were certainly 

 included (Fulton 1970). 



232 



