School of Aquatic and Fishery Sciences

Columbia Basin Performance Measures

Forecasted Juvenile Passage Exposure Results for Aug 12, 2025

graph

Forecasted Yearling Chinook Snake R All Spr/Sum Wild Query Parameters
Year	2025
Project	Ice Harbor
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	Aug 12, 2025

Total Run Period (Mar 2 - Sep 23)
Temperature Exposure Index	13.28 °C
Percent of Fish Exposed	13.3 %
Number of Days Fish Exposed	65

Middle 80% of Run Period (Apr 30 - Jun 6)
Temperature Exposure Index	12.94 °C
Percent of Fish Exposed	4.2 %
Number of Days Fish Exposed	6

Middle 50% of Run Period (May 6 - May 21)
Temperature Exposure Index	12.99 °C
Percent of Fish Exposed	0 %
Number of Days Fish Exposed	0

Run Dates
First Day of Run	Mar 2
5% of Run passed	Apr 26
10% of Run passed	Apr 30
50% of Run passed	May 13
90% of Run passed	Jun 6
95% of Run passed	Jun 16
Last Day of Run	Sep 23

Date(s) When Temperature Crosses 15 °C
Jun 1

1. Total Run Analyzed [99.929] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.