Columbia Basin Performance Measures

Forecasted Juvenile Passage Exposure Results for Jul 20, 2025

Forecasted Steelhead Snake R Wild Query Parameters
Year	2025
Project	Bonneville
River Parameter	TDG Percent
Critical TDG Percent Value	120 %
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 25)
TDG Percent Exposure Index	120.16 %
Percent of Fish Exposed	65.3 %
Number of Days Fish Exposed	40

Middle 80% of Run Period (May 12 - Jun 8)
TDG Percent Exposure Index	120.29 %
Percent of Fish Exposed	70.6 %
Number of Days Fish Exposed	20

Middle 50% of Run Period (May 18 - Jun 2)
TDG Percent Exposure Index	120.24 %
Percent of Fish Exposed	63.7 %
Number of Days Fish Exposed	10

Run Dates
First Day of Run	Mar 12
5% of Run passed	May 7
10% of Run passed	May 12
50% of Run passed	May 25
90% of Run passed	Jun 8
95% of Run passed	Jun 11
Last Day of Run	Jul 25

Date(s) When TDG Percent Crosses 120 %
Apr 12
Apr 13
Apr 17
Apr 21
Apr 22
Apr 26
Apr 27
May 5
May 7
May 9
May 13
May 21
May 22
May 25
May 28
Jun 1
Jun 3
Jun 4
Jun 5
Jun 10
Jun 11
Jun 12

1. Total Run Analyzed [99.954] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.