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 - Jul 4)
Total Number of Fish Observed2204
Percent of Total Run Analyzed [Number Observed]99.77 % [2199]1
Tailrace TDG Percent Exposure Index119.26 %
Percent of Fish Exposed [Number Exposed]46.2 % [1017]
Number of Days Fish Exposed21
Middle 80% of Run Period (Apr 29 - Jun 6)
Number of Fish Observed1807
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [1807]
Tailrace TDG Percent Exposure Index119.39 %
Percent of Fish Exposed [Number Exposed]48.4 % [875]
Number of Days Fish Exposed14
Middle 50% of Run Period (May 8 - May 24)
Number of Fish Observed1134
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [1134]
Tailrace TDG Percent Exposure Index119.93 %
Percent of Fish Exposed [Number Exposed]64.5 % [732]
Number of Days Fish Exposed9
Run Dates
First Day of RunMar 20
5% of Run passedApr 25
10% of Run passedApr 29
50% of Run passedMay 18
90% of Run passedJun 6
95% of Run passedJun 10
Last Day of RunJul 4
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 [2199] is less than total observed during the period [2204]. Only fish observed on days with River Parameter data are analyzed.