Adult Fishway Inspections on the Columbia and Snake Rivers, 1984-1985 Annual Report.
- Columbia Basin Fish and Wildlife Authority, Water Budget Center, Portland, OR
Mainstream projects which have adult fish passage facilities are inspected by project operators, fishway attendants, and state and federal fishery agencies. The overall movement of upstream migrants in 1984 appeared to be satisfactory with few delays. Special efforts were made by fishery agencies and Corps personnel to check on potential problems which appeared to exist at The Dalles and John Day Dams this year. However, adult passage facilities were operating ''in criteria'' and fish may have been delayed by temperature or other factors. Inspections were generally made once a month. Some projects were operating at less than full criteria as seen during inspections by fishery agencies this year. It appears that during periods of low tailwater, certain projects have difficulty maintaining proper head at main fishway entrances. Some main entrance gates bottom-out and water depth over these weirs are not up to desired criteria. Also it was noted that auxiliary water pumps were not being run at a rate to achieve the desired amount of water for attracting fish to the fish ladders and maintaining proper head at main fishway entrances.
- Research Organization:
- Columbia Basin Fish and Wildlife Authority
- Sponsoring Organization:
- United States. Bonneville Power Administration.
- OSTI ID:
- 5324809
- Report Number(s):
- DOE/BP-11797-3; ON: DE85017316
- Country of Publication:
- United States
- Language:
- English
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