School of Aquatic and Fishery Sciences

Columbia Basin Performance Measures

Forecasted Adult Passage Exposure Results for Jun 29, 2025

graph

All Adult Chinook mouth to Snake River Query Parameters
Year	2025
Project	Bonneville
River Parameter	Temperature
Critical Temperature Value	15 °C
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	1/1 - 12/31
Forecast Date	Jun 29, 2025

Total Run Period (Mar 14 - Jun 14)
Temperature Exposure Index	13.57 °C
Percent of Fish Exposed	20.8 %
Number of Days Fish Exposed	19

Middle 80% of Run Period (Apr 26 - Jun 7)
Temperature Exposure Index	13.36 °C
Percent of Fish Exposed	13.9 %
Number of Days Fish Exposed	12

Middle 50% of Run Period (May 2 - May 23)
Temperature Exposure Index	13.1 °C
Percent of Fish Exposed	0 %
Number of Days Fish Exposed	0

Run Dates
First Day of Run	Mar 14
5% of Run passed	Apr 23
10% of Run passed	Apr 26
50% of Run passed	May 8
90% of Run passed	Jun 7
95% of Run passed	Jun 11
Last Day of Run	Jun 14

Date(s) When Temperature Crosses 15 °C
May 27

1. Total Run Analyzed [99.241] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.