Columbia Basin Performance Measures

PIT Tag Exposure Results

graph
PIT-Tagged Wild Spring/Summer Chinook Query Parameters
Year2025
ProjectLower Granite
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 Observed5353
Percent of Total Run Analyzed [Number Observed]94.8 % [5075]1
Tailrace TDG Percent Exposure Index119.66 %
Percent of Fish Exposed [Number Exposed]72.1 % [3661]
Number of Days Fish Exposed60
Middle 80% of Run Period ( - )
Number of Fish Observed4409
Percent of Middle 80% of Run Analyzed [Number Observed]93.69 % [4131]
Tailrace TDG Percent Exposure Index121.42 %
Percent of Fish Exposed [Number Exposed]84.5 % [3492]
Number of Days Fish Exposed52
Middle 50% of Run Period ( - )
Number of Fish Observed2741
Percent of Middle 50% of Run Analyzed [Number Observed]93.61 % [2566]
Tailrace TDG Percent Exposure Index121.7 %
Percent of Fish Exposed [Number Exposed]85.5 % [2196]
Number of Days Fish Exposed19
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 [5075] is less than total observed during the period [5353]. Only fish observed on days with River Parameter data are analyzed.