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 - Jul 1)
Total Number of Fish Observed11754
Percent of Total Run Analyzed [Number Observed]86.6 % [10179]1
Temperature Tailrace Exposure Index16.47 C
Percent of Fish Exposed [Number Exposed]82.3 % [8386]
Number of Days Fish Exposed28
Middle 80% of Run Period (Mar 15 - Jun 30)
Number of Fish Observed9921
Percent of Middle 80% of Run Analyzed [Number Observed]95.76 % [9501]
Temperature Tailrace Exposure Index16.32 C
Percent of Fish Exposed [Number Exposed]81.1 % [7708]
Number of Days Fish Exposed27
Middle 50% of Run Period (May 26 - Jun 26)
Number of Fish Observed6107
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [6107]
Temperature Tailrace Exposure Index16.68 C
Percent of Fish Exposed [Number Exposed]92.5 % [5653]
Number of Days Fish Exposed23
Run Dates
First Day of RunJan 1
5% of Run passedFeb 13
10% of Run passedMar 15
50% of Run passedJun 18
90% of Run passedJun 30
95% of Run passedJul 1
Last Day of RunJul 1
Date(s) When Temperature Tailrace Crosses 15 C
Jun 1, Jun 3, Jun 6

1. Total Run Analyzed [10179] is less than total observed during the period [11754]. Only fish observed on days with River Parameter data are analyzed.