School of Aquatic and Fishery Sciences

Columbia Basin Performance Measures

Forecasted Juvenile Passage Exposure Results for Jul 20, 2025

graph

Forecasted Steelhead Snake R 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	Jul 20, 2025

Total Run Period (Mar 12 - Jul 19)
Temperature Exposure Index	13.29 °C
Percent of Fish Exposed	11.5 %
Number of Days Fish Exposed	30

Middle 80% of Run Period (May 4 - Jun 1)
Temperature Exposure Index	13.12 °C
Percent of Fish Exposed	2.4 %
Number of Days Fish Exposed	1

Middle 50% of Run Period (May 11 - May 26)
Temperature Exposure Index	12.84 °C
Percent of Fish Exposed	0 %
Number of Days Fish Exposed	0

Run Dates
First Day of Run	Mar 12
5% of Run passed	Apr 29
10% of Run passed	May 4
50% of Run passed	May 17
90% of Run passed	Jun 1
95% of Run passed	Jun 5
Last Day of Run	Jul 19

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

1. Total Run Analyzed [99.946] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.