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 Observed4230
Percent of Total Run Analyzed [Number Observed]100 % [4230]
Tailrace TDG Percent Exposure Index124.22 %
Percent of Fish Exposed [Number Exposed]66.2 % [2801]
Number of Days Fish Exposed28
Middle 80% of Run Period (Apr 26 - May 30)
Number of Fish Observed3449
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [3449]
Tailrace TDG Percent Exposure Index125.85 %
Percent of Fish Exposed [Number Exposed]79.9 % [2756]
Number of Days Fish Exposed27
Middle 50% of Run Period (May 3 - May 23)
Number of Fish Observed2301
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [2301]
Tailrace TDG Percent Exposure Index127.28 %
Percent of Fish Exposed [Number Exposed]88.1 % [2029]
Number of Days Fish Exposed19
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 3
Last Day of RunJun 23
Date(s) When Tailrace TDG Percent Crosses 120 %
May 1, May 2, May 5, May 31, Jun 1, Jun 2