Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Spring/Summer Chinook 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 27 - Jun 21)
Total Number of Fish Observed5015
Percent of Total Run Analyzed [Number Observed]100 % [5015]
Tailrace TDG Percent Exposure Index121.12 %
Percent of Fish Exposed [Number Exposed]39.9 % [2004]
Number of Days Fish Exposed28
Middle 80% of Run Period (Apr 25 - May 20)
Number of Fish Observed4098
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [4098]
Tailrace TDG Percent Exposure Index121.11 %
Percent of Fish Exposed [Number Exposed]41.6 % [1707]
Number of Days Fish Exposed17
Middle 50% of Run Period (Apr 28 - May 9)
Number of Fish Observed2781
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [2781]
Tailrace TDG Percent Exposure Index119.76 %
Percent of Fish Exposed [Number Exposed]35.3 % [984]
Number of Days Fish Exposed6
Run Dates
First Day of RunFeb 27
5% of Run passedApr 23
10% of Run passedApr 25
50% of Run passedMay 1
90% of Run passedMay 20
95% of Run passedMay 28
Last Day of RunJun 21
Date(s) When Tailrace TDG Percent Crosses 120 %
May 1, May 2, May 5, May 31, Jun 1, Jun 2