Columbia Basin Performance Measures

Adult Passage Exposure Results

graph

Adult Chinook Query Parameters
Year2018
ProjectBonneville
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value120 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates3/15 - 6/15
Total Run Period (Mar 16 - Jun 15)
Total Number of Fish Observed108041
Percent of Total Run Analyzed [Number Observed]42.79 % [46240]1
Tailrace TDG Percent Exposure Index122.93 %
Percent of Fish Exposed [Number Exposed]92.7 % [42867]
Number of Days Fish Exposed18
Middle 80% of Run Period (May 4 - Jun 8)
Number of Fish Observed87298
Percent of Middle 80% of Run Analyzed [Number Observed]40.86 % [35674]
Tailrace TDG Percent Exposure Index123.35 %
Percent of Fish Exposed [Number Exposed]100 % [35674]
Number of Days Fish Exposed10
Middle 50% of Run Period (May 7 - May 26)
Number of Fish Observed56364
Percent of Middle 50% of Run Analyzed [Number Observed]36.81 % [20752]
Tailrace TDG Percent Exposure Index124.03 %
Percent of Fish Exposed [Number Exposed]100 % [20752]
Number of Days Fish Exposed7
Run Dates
First Day of RunMar 16
5% of Run passedApr 30
10% of Run passedMay 4
50% of Run passedMay 16
90% of Run passedJun 8
95% of Run passedJun 11
Last Day of RunJun 15
Date(s) When Tailrace TDG Percent Crosses 120 %
Apr 10, Apr 12, Apr 15, Apr 16, Apr 29

1. Total Run Analyzed [46240] is less than total observed during the period [108041]. Only fish observed on days with River Parameter data are analyzed.