John Day Dam

Location: River Mile 215.6 on the Columbia River in HUC 17060105
Operated by: United States Army Corp of Engineers, Portland District
Link: https://www.nwp.usace.army.mil/op/d/johnday.asp

2010 Smolt Monitoring

Dates: April 1 to September 15
Sampling conducted by: Pacific States Marine Fisheries Commission.
Project Leader: Greg Kovalchuk, Rick Martinson

More information can be found at the John Day/Bonneville Smolt Monitoring Web Page

Passage index formula

1999 to present:	(collection count)/((average(COE turbine discharge/(COE turbine discharge + total spill))))
1998:	(collection count)/((average(COE turbine discharge/(COE turbine discharge + COE total spill))))
1997 to 1987:	(collection count)/((average(UNIT 3 flow/(COE turbine discharge + total spill))))
1986:	(collection count)/((average(UNIT 3 flow/(COE turbine discharge + UNIT 3 + total spill))))
1985:	(collection count)/((average(UNIT 3 flow/(river flow + total spill))))

Traditional Adult Return Reporting Dates

April 1 to October 31

Page last updated on: January 30, 2010

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