Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Summer Steelhead 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 (Mar 20 - May 17)
Total Number of Fish Observed799
Percent of Total Run Analyzed [Number Observed]99.37 % [794]1
Tailrace TDG Percent Exposure Index118.24 %
Percent of Fish Exposed [Number Exposed]20.1 % [160]
Number of Days Fish Exposed3
Middle 80% of Run Period (Apr 24 - May 16)
Number of Fish Observed665
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [665]
Tailrace TDG Percent Exposure Index118.29 %
Percent of Fish Exposed [Number Exposed]15.1 % [101]
Number of Days Fish Exposed2
Middle 50% of Run Period (Apr 30 - May 13)
Number of Fish Observed407
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [407]
Tailrace TDG Percent Exposure Index117.64 %
Percent of Fish Exposed [Number Exposed]0 % [0]
Number of Days Fish Exposed0
Run Dates
First Day of RunMar 20
5% of Run passedApr 17
10% of Run passedApr 24
50% of Run passedMay 6
90% of Run passedMay 16
95% of Run passedMay 17
Last Day of RunMay 17
Date(s) When Tailrace TDG Percent Crosses 120 %
May 15

1. Total Run Analyzed [794] is less than total observed during the period [799]. Only fish observed on days with River Parameter data are analyzed.