Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Spring/Summer Chinook Query Parameters
Year2024
ProjectBonneville
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 22 - Aug 12)
Total Number of Fish Observed2128
Percent of Total Run Analyzed [Number Observed]99.81 % [2124]1
Tailrace TDG Percent Exposure Index119.13 %
Percent of Fish Exposed [Number Exposed]45.6 % [969]
Number of Days Fish Exposed21
Middle 80% of Run Period (Apr 28 - May 27)
Number of Fish Observed1736
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [1736]
Tailrace TDG Percent Exposure Index119.23 %
Percent of Fish Exposed [Number Exposed]49.5 % [861]
Number of Days Fish Exposed9
Middle 50% of Run Period (May 3 - May 21)
Number of Fish Observed1122
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [1122]
Tailrace TDG Percent Exposure Index119.58 %
Percent of Fish Exposed [Number Exposed]62.6 % [703]
Number of Days Fish Exposed7
Run Dates
First Day of RunFeb 22
5% of Run passedApr 25
10% of Run passedApr 28
50% of Run passedMay 16
90% of Run passedMay 27
95% of Run passedJun 8
Last Day of RunAug 12
Date(s) When Tailrace TDG Percent Crosses 120 %
May 15, May 22, May 23, May 25, May 31, Jun 2, Jun 4, Jun 14

1. Total Run Analyzed [2124] is less than total observed during the period [2128]. Only fish observed on days with River Parameter data are analyzed.