Columbia Basin Performance Measures

Adult Passage Exposure Results

graph

Adult Steelhead Query Parameters
Year2017
ProjectBonneville
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value115 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates1/1 - 12/31
Total Run Period (Jan 1 - Nov 19)
Total Number of Fish Observed117398
Percent of Total Run Analyzed [Number Observed]88.79 % [104249]1
Tailrace TDG Percent Exposure Index114.02 %
Percent of Fish Exposed [Number Exposed]48 % [50067]
Number of Days Fish Exposed161
Middle 80% of Run Period (Jul 21 - Sep 23)
Number of Fish Observed94723
Percent of Middle 80% of Run Analyzed [Number Observed]98.07 % [92898]
Tailrace TDG Percent Exposure Index113.48 %
Percent of Fish Exposed [Number Exposed]42.3 % [39367]
Number of Days Fish Exposed33
Middle 50% of Run Period (Aug 5 - Sep 12)
Number of Fish Observed60193
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [60193]
Tailrace TDG Percent Exposure Index113.73 %
Percent of Fish Exposed [Number Exposed]36.6 % [22055]
Number of Days Fish Exposed18
Run Dates
First Day of RunJan 1
5% of Run passedJul 6
10% of Run passedJul 21
50% of Run passedAug 24
90% of Run passedSep 23
95% of Run passedSep 30
Last Day of RunNov 19
Date(s) When Tailrace TDG Percent Crosses 115 %
Mar 9, Jun 4, Jun 9, Jul 8, Jul 9, Aug 14, Aug 15, Aug 18, Aug 21, Aug 23, Aug 28, Sep 1

1. Total Run Analyzed [104249] is less than total observed during the period [117398]. Only fish observed on days with River Parameter data are analyzed.