Columbia Basin Performance Measures

Adult Passage Exposure Results

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Adult Chinook Query Parameters
Year2019
ProjectJohn Day
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value120 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates3/15 - 6/15
Total Run Period (Apr 4 - Jun 15)
Total Number of Fish Observed44104
Percent of Total Run Analyzed [Number Observed]100 % [44104]
Tailrace TDG Percent Exposure Index118.19 %
Percent of Fish Exposed [Number Exposed]4 % [1768]
Number of Days Fish Exposed3
Middle 80% of Run Period (May 7 - Jun 11)
Number of Fish Observed35944
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [35944]
Tailrace TDG Percent Exposure Index118.32 %
Percent of Fish Exposed [Number Exposed]4.9 % [1766]
Number of Days Fish Exposed2
Middle 50% of Run Period (May 10 - Jun 2)
Number of Fish Observed24029
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [24029]
Tailrace TDG Percent Exposure Index118.68 %
Percent of Fish Exposed [Number Exposed]7.3 % [1766]
Number of Days Fish Exposed2
Run Dates
First Day of RunApr 4
5% of Run passedMay 5
10% of Run passedMay 7
50% of Run passedMay 17
90% of Run passedJun 11
95% of Run passedJun 14
Last Day of RunJun 15
Date(s) When Tailrace TDG Percent Crosses 120 %
Apr 10, Apr 11, May 18, May 19, May 20, May 21