Columbia Basin - Washington 



Columbia Basin - Idaho 



Columbia Basin -Oregon 



80 



160 



240 



Scale in Kilometers 



Figure 5. — Columbia Basin regions. 



salmon and steelhead trout migration. In these cases, the 

 State has been very successful with the program of trans- 

 ferring fish reared to suitable release sites, and trapping 

 and returning brood stock, spawning them, and trans- 

 porting the eggs back to the hatchery. In this way, IDFG 

 has been able to make good use of off-site hatcheries on 

 good water sources. 



Summer steelhead trout and spring chinook salmon 

 are the two species reared in the greatest numbers in 

 Idaho. Although the facilities in the State have released 

 only 6^ of the Pacific coast migrant totals by weight 

 since 1960, they have accounted for 42^ of the summer 

 steelhead trout and ll c r of the spring chinook salmon by 

 weight during that period (Table 18). Summer steelhead 

 trout production has increased from an initial release in 

 1965 of 24.000 migrant fish weighing 2,600 lb (1,200 kg) to 



a high of 6.3 million fish weighing 750,000 lb (340,200 kg) 

 in 1974. This is largely due to the opening of Dworshak 

 NFH in 1969. 



Columbia Basin-Oregon. — The first hatchery in Ore- 

 gon was constructed by a private corporation, the Ore- 

 gon and Washington Fish Propagating Company. Its 

 hatchery, the first in the Columbia Basin, was built in 

 1876 on the Clackamas River near its confluence with the 

 Willamette River. The company operated the hatchery 

 from 1876 to 1880 when lack of funds forced a closure. In 

 1887, the Oregon Fish and Game Commission rented and 

 renovated the facility, but was able to operate it for only 

 1 yr because of funding problems. In 1889, the operation 

 of the hatchery was transferred to the U.S. Commission 

 of Fish and Fisheries. One condition of this transfer was 



16 



