Columbia Basin Performance Measures

Adult Passage Exposure Results

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Adult Steelhead Query Parameters
Year2021
ProjectJohn Day
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value120 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates1/1 - 12/31
Total Run Period (Apr 1 - Oct 31)
Total Number of Fish Observed54780
Percent of Total Run Analyzed [Number Observed]100 % [54780]
Tailrace TDG Percent Exposure Index103.13 %
Percent of Fish Exposed [Number Exposed]0 % [4]
Number of Days Fish Exposed1
Middle 80% of Run Period (Aug 26 - Oct 11)
Number of Fish Observed44278
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [44278]
Tailrace TDG Percent Exposure Index102.25 %
Percent of Fish Exposed [Number Exposed]0 % [0]
Number of Days Fish Exposed0
Middle 50% of Run Period (Sep 4 - Sep 27)
Number of Fish Observed27906
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [27906]
Tailrace TDG Percent Exposure Index101.56 %
Percent of Fish Exposed [Number Exposed]0 % [0]
Number of Days Fish Exposed0
Run Dates
First Day of RunApr 1
5% of Run passedJul 24
10% of Run passedAug 26
50% of Run passedSep 16
90% of Run passedOct 11
95% of Run passedOct 18
Last Day of RunOct 31
Date(s) When Tailrace TDG Percent Crosses 120 %
Jun 5, Jun 8