Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Summer Steelhead Query Parameters
Year2018
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 (Feb 28 - Jun 23)
Total Number of Fish Observed4612
Percent of Total Run Analyzed [Number Observed]100 % [4612]
Tailrace TDG Percent Exposure Index124.46 %
Percent of Fish Exposed [Number Exposed]66.5 % [3068]
Number of Days Fish Exposed29
Middle 80% of Run Period (Apr 26 - May 30)
Number of Fish Observed3791
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [3791]
Tailrace TDG Percent Exposure Index125.97 %
Percent of Fish Exposed [Number Exposed]76.8 % [2912]
Number of Days Fish Exposed26
Middle 50% of Run Period (May 4 - May 22)
Number of Fish Observed2349
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [2349]
Tailrace TDG Percent Exposure Index127.58 %
Percent of Fish Exposed [Number Exposed]92.3 % [2170]
Number of Days Fish Exposed18
Run Dates
First Day of RunFeb 28
5% of Run passedApr 20
10% of Run passedApr 26
50% of Run passedMay 11
90% of Run passedMay 30
95% of Run passedJun 2
Last Day of RunJun 23
Date(s) When Tailrace TDG Percent Crosses 120 %
May 5, Jun 3