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	Little Goose
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 23 - Jun 29)
Temperature Exposure Index	13.63 °C
Percent of Fish Exposed	28.9 %
Number of Days Fish Exposed	30

Middle 80% of Run Period (May 11 - Jun 17)
Temperature Exposure Index	13.26 °C
Percent of Fish Exposed	23.5 %
Number of Days Fish Exposed	18

Middle 50% of Run Period (May 16 - Jun 3)
Temperature Exposure Index	12.52 °C
Percent of Fish Exposed	8.9 %
Number of Days Fish Exposed	4

Run Dates
First Day of Run	Mar 23
5% of Run passed	May 8
10% of Run passed	May 11
50% of Run passed	May 21
90% of Run passed	Jun 17
95% of Run passed	Jun 21
Last Day of Run	Jun 29

Date(s) When Temperature Crosses 15 °C
May 31

1. Total Run Analyzed [99.955] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.