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	Lower Monumental
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	Aug 12, 2025

Total Run Period (Mar 2 - Sep 21)
TDG Percent Exposure Index	121.98 %
Percent of Fish Exposed	86.9 %
Number of Days Fish Exposed	60

Middle 80% of Run Period (Apr 28 - Jun 6)
TDG Percent Exposure Index	122.52 %
Percent of Fish Exposed	96.8 %
Number of Days Fish Exposed	37

Middle 50% of Run Period (May 4 - May 19)
TDG Percent Exposure Index	123.16 %
Percent of Fish Exposed	100 %
Number of Days Fish Exposed	16

Run Dates
First Day of Run	Mar 2
5% of Run passed	Apr 23
10% of Run passed	Apr 28
50% of Run passed	May 11
90% of Run passed	Jun 6
95% of Run passed	Jun 15
Last Day of Run	Sep 21

Date(s) When TDG Percent Crosses 120 %
Apr 3
Apr 6
Apr 8
Apr 26
Apr 28
May 24
May 27
Jun 10

1. Total Run Analyzed [99.931] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.