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	McNary
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 19 - Jun 24)
Temperature Exposure Index	14.05 °C
Percent of Fish Exposed	29.6 %
Number of Days Fish Exposed	28

Middle 80% of Run Period (May 6 - Jun 15)
Temperature Exposure Index	13.91 °C
Percent of Fish Exposed	25.1 %
Number of Days Fish Exposed	19

Middle 50% of Run Period (May 11 - Jun 1)
Temperature Exposure Index	13.28 °C
Percent of Fish Exposed	10.2 %
Number of Days Fish Exposed	5

Run Dates
First Day of Run	Mar 19
5% of Run passed	May 3
10% of Run passed	May 6
50% of Run passed	May 16
90% of Run passed	Jun 15
95% of Run passed	Jun 18
Last Day of Run	Jun 24

Date(s) When Temperature Crosses 15 °C
May 28

1. Total Run Analyzed [99.951] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.