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Evaluation Of Adult Chinook Salmon Passage At Priest Rapids Dam With Orifice Gates Open And Closed Item Info
- Title:
- Evaluation Of Adult Chinook Salmon Passage At Priest Rapids Dam With Orifice Gates Open And Closed
- Report Type:
- Technical Report
- Date:
- 1996
- Authors:
- Bjornn, T.C.; Jepson, M.A.; Peery, C.A.; Tolotti, K.R.
- Affiliations:
- Idaho Cooperative Fish and Wildlife Research Unit
- Report Number:
- 1996-01
- Publisher:
- University of Idaho
- Funder:
- Public Utility District of Grant County, Ephrata, Washington
- Abstract:
- Radio-tagged adult spring and summer Chinook salmon were monitored to evaluate passage condition at Priest Rapids Dam, mid-Columbia River, during 1996. Passage times were assessed during two treatment conditions: half the powerhouse orifice gates open and all orifice gates closed. Travel times from first record in the tailrace to first approach at the dam, to first entry into the fishway, first entry to the junction pool, and to pass the dam were not significantly different with respect to orifice gate closure. Of 119 radio-tagged Chinook salmon monitored at Priest Rapids Dam, 115 salmon eventually crossed the dam. Salmon entered the fishway collection channel mainly at the east-shore and west-powerhouse entrances. There were more entries than exits at the east entrance, but more exits than entries at the west-powerhouse openings. Half the radio-tagged Chinook salmon passed Priest Rapids Dam in less than 37.6 h. About one-third of time to pass the dam was associated with movements in and out of the junction pool area. After entering the junction pool for the first time, most (79%) fish returned to the collection channel and then exited and re-entered the fishway an average of 6.5 times before successfully crossing the dam. Six fish fell back over the dam during this study, for a fallback rate of 5.2%. Four fish re-ascended the dam in an average of 9.8 days.
- Species:
- Chinook salmon, Oncorhynchus tshawytscha
- Location:
- Columbia River; Priest Rapids Dam
- Subjects:
- salmonids Federal Columbia River Power System FCPRS radiotelemetry migration fishways passage behavior fallback rates
- Source:
- University of Idaho, Fish Ecology Research Lab
- Original Filename:
- 1996-01-CK-passage-at-Priest Rapids-1996.pdf
- Format:
- application/pdf
Source
- Preferred Citation:
- "Evaluation Of Adult Chinook Salmon Passage At Priest Rapids Dam With Orifice Gates Open And Closed", Adult Salmon and Steelhead Migration Studies: 1996-2014, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/ferl/items/ferl-tr-1996-01.html
Rights
- Rights:
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