Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Summer Steelhead Query Parameters
Year2024
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 (Mar 21 - May 17)
Total Number of Fish Observed4842
Percent of Total Run Analyzed [Number Observed]100 % [4842]
Tailrace TDG Percent Exposure Index122.29 %
Percent of Fish Exposed [Number Exposed]93.9 % [4550]
Number of Days Fish Exposed33
Middle 80% of Run Period (Apr 18 - May 16)
Number of Fish Observed4283
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [4283]
Tailrace TDG Percent Exposure Index122.51 %
Percent of Fish Exposed [Number Exposed]98.6 % [4227]
Number of Days Fish Exposed28
Middle 50% of Run Period (Apr 28 - May 14)
Number of Fish Observed2519
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [2519]
Tailrace TDG Percent Exposure Index121.68 %
Percent of Fish Exposed [Number Exposed]97.7 % [2463]
Number of Days Fish Exposed16
Run Dates
First Day of RunMar 21
5% of Run passedApr 14
10% of Run passedApr 18
50% of Run passedMay 7
90% of Run passedMay 16
95% of Run passedMay 16
Last Day of RunMay 17
Date(s) When Tailrace TDG Percent Crosses 120 %
Apr 14, May 5, May 6