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	The Dalles
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 24)
Temperature Exposure Index	14.73 °C
Percent of Fish Exposed	36.9 %
Number of Days Fish Exposed	40

Middle 80% of Run Period (May 11 - Jun 6)
Temperature Exposure Index	14.63 °C
Percent of Fish Exposed	33.8 %
Number of Days Fish Exposed	10

Middle 50% of Run Period (May 17 - Jun 1)
Temperature Exposure Index	14.42 °C
Percent of Fish Exposed	25.9 %
Number of Days Fish Exposed	5

Run Dates
First Day of Run	Mar 12
5% of Run passed	May 6
10% of Run passed	May 11
50% of Run passed	May 23
90% of Run passed	Jun 6
95% of Run passed	Jun 10
Last Day of Run	Jul 24

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

1. Total Run Analyzed [99.956] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.