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	John Day
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 23)
Temperature Exposure Index	14.48 °C
Percent of Fish Exposed	34.9 %
Number of Days Fish Exposed	39

Middle 80% of Run Period (May 10 - Jun 6)
Temperature Exposure Index	14.42 °C
Percent of Fish Exposed	32.5 %
Number of Days Fish Exposed	10

Middle 50% of Run Period (May 16 - May 31)
Temperature Exposure Index	14.1 °C
Percent of Fish Exposed	20.8 %
Number of Days Fish Exposed	4

Run Dates
First Day of Run	Mar 12
5% of Run passed	May 5
10% of Run passed	May 10
50% of Run passed	May 22
90% of Run passed	Jun 6
95% of Run passed	Jun 9
Last Day of Run	Jul 23

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

1. Total Run Analyzed [99.948] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.