Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Spring/Summer Chinook Query Parameters
Year2020
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 (Feb 19 - Sep 15)
Total Number of Fish Observed3397
Percent of Total Run Analyzed [Number Observed]99.94 % [3395]1
Tailrace TDG Percent Exposure Index120.54 %
Percent of Fish Exposed [Number Exposed]68.9 % [2341]
Number of Days Fish Exposed45
Middle 80% of Run Period (Apr 30 - Jun 3)
Number of Fish Observed2756
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [2756]
Tailrace TDG Percent Exposure Index120.92 %
Percent of Fish Exposed [Number Exposed]78.3 % [2159]
Number of Days Fish Exposed30
Middle 50% of Run Period (May 4 - May 18)
Number of Fish Observed1888
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [1888]
Tailrace TDG Percent Exposure Index120.62 %
Percent of Fish Exposed [Number Exposed]81.5 % [1540]
Number of Days Fish Exposed13
Run Dates
First Day of RunFeb 19
5% of Run passedApr 26
10% of Run passedApr 30
50% of Run passedMay 9
90% of Run passedJun 3
95% of Run passedJun 29
Last Day of RunSep 15
Date(s) When Tailrace TDG Percent Crosses 120 %
Apr 29, Apr 30, May 2, May 3, May 4, May 6, May 8, Jun 16, Jun 20, Jun 21, Jun 26, Jun 27

1. Total Run Analyzed [3395] is less than total observed during the period [3397]. Only fish observed on days with River Parameter data are analyzed.