Columbia Basin Performance Measures

PIT Tag Exposure Results

graph
PIT-Tagged Wild Spring/Summer Chinook Query Parameters
Year2025
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 ( - )
Total Number of Fish Observed1622
Percent of Total Run Analyzed [Number Observed]99.87 % [1620]1
Tailrace TDG Percent Exposure Index121.39 %
Percent of Fish Exposed [Number Exposed]97.9 % [1587]
Number of Days Fish Exposed58
Middle 80% of Run Period ( - )
Number of Fish Observed1331
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [1331]
Tailrace TDG Percent Exposure Index121.44 %
Percent of Fish Exposed [Number Exposed]100 % [1331]
Number of Days Fish Exposed29
Middle 50% of Run Period ( - )
Number of Fish Observed899
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [899]
Tailrace TDG Percent Exposure Index121.52 %
Percent of Fish Exposed [Number Exposed]100 % [899]
Number of Days Fish Exposed14
Run Dates
First Day of Run
5% of Run passed
10% of Run passed
50% of Run passed
90% of Run passed
95% of Run passed
Last Day of Run
Date(s) When Tailrace TDG Percent Crosses 120 %
1. Total Run Analyzed [1620] is less than total observed during the period [1622]. Only fish observed on days with River Parameter data are analyzed.