Columbia Basin Performance Measures

PIT Tag Exposure Results

graph
PIT-Tagged Wild Summer Steelhead 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 Observed7717
Percent of Total Run Analyzed [Number Observed]93.58 % [7222]1
Tailrace TDG Percent Exposure Index122.38 %
Percent of Fish Exposed [Number Exposed]90.6 % [6547]
Number of Days Fish Exposed60
Middle 80% of Run Period ( - )
Number of Fish Observed6280
Percent of Middle 80% of Run Analyzed [Number Observed]92.11 % [5785]
Tailrace TDG Percent Exposure Index122.82 %
Percent of Fish Exposed [Number Exposed]93.8 % [5432]
Number of Days Fish Exposed34
Middle 50% of Run Period ( - )
Number of Fish Observed4270
Percent of Middle 50% of Run Analyzed [Number Observed]88.4 % [3775]
Tailrace TDG Percent Exposure Index123.7 %
Percent of Fish Exposed [Number Exposed]100 % [3775]
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 [7222] is less than total observed during the period [7717]. Only fish observed on days with River Parameter data are analyzed.