Columbia Basin Performance Measures

Adult Passage Exposure Results

graph

Adult Steelhead Query Parameters
Year2024
ProjectBonneville
River ParameterTemperature Tailrace
Critical Temperature Tailrace Value15 C
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates1/1 - 12/31
Total Run Period (Jan 1 - Dec 31)
Total Number of Fish Observed181907
Percent of Total Run Analyzed [Number Observed]93.36 % [169832]1
Temperature Tailrace Exposure Index20.6 C
Percent of Fish Exposed [Number Exposed]98.9 % [168039]
Number of Days Fish Exposed114
Middle 80% of Run Period (Jul 9 - Sep 21)
Number of Fish Observed147152
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [147152]
Temperature Tailrace Exposure Index20.99 C
Percent of Fish Exposed [Number Exposed]100 % [147152]
Number of Days Fish Exposed75
Middle 50% of Run Period (Jul 27 - Sep 8)
Number of Fish Observed94804
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [94804]
Temperature Tailrace Exposure Index21.21 C
Percent of Fish Exposed [Number Exposed]100 % [94804]
Number of Days Fish Exposed44
Run Dates
First Day of RunJan 1
5% of Run passedJun 27
10% of Run passedJul 9
50% of Run passedAug 21
90% of Run passedSep 21
95% of Run passedSep 27
Last Day of RunDec 31
Date(s) When Temperature Tailrace Crosses 15 C
Jun 1, Jun 3, Jun 6

1. Total Run Analyzed [169832] is less than total observed during the period [181907]. Only fish observed on days with River Parameter data are analyzed.