Columbia Basin Performance Measures

Adult Passage Exposure Results

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Adult Chinook Query Parameters
Year2018
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 (Mar 20 - Jun 15)
Total Number of Fish Observed61526
Percent of Total Run Analyzed [Number Observed]100 % [61526]
Tailrace TDG Percent Exposure Index125.3 %
Percent of Fish Exposed [Number Exposed]71 % [43743]
Number of Days Fish Exposed28
Middle 80% of Run Period (May 8 - Jun 10)
Number of Fish Observed50648
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [50648]
Tailrace TDG Percent Exposure Index126.71 %
Percent of Fish Exposed [Number Exposed]80 % [40569]
Number of Days Fish Exposed24
Middle 50% of Run Period (May 12 - Jun 1)
Number of Fish Observed31997
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [31997]
Tailrace TDG Percent Exposure Index129.35 %
Percent of Fish Exposed [Number Exposed]97.5 % [31218]
Number of Days Fish Exposed20
Run Dates
First Day of RunMar 20
5% of Run passedMay 6
10% of Run passedMay 8
50% of Run passedMay 23
90% of Run passedJun 10
95% of Run passedJun 13
Last Day of RunJun 15
Date(s) When Tailrace TDG Percent Crosses 120 %
May 1, May 2, May 5, May 31, Jun 1, Jun 2