School of Aquatic and Fishery Sciences

Columbia Basin Performance Measures

Forecasted Adult Passage Exposure Results for Jun 29, 2025

graph

All Adult Chinook mouth to Snake River 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	Jun 29, 2025

Total Run Period (Mar 22 - Jun 27)
TDG Percent Exposure Index	121.7 %
Percent of Fish Exposed	76.5 %
Number of Days Fish Exposed	61

Middle 80% of Run Period (May 10 - Jun 16)
TDG Percent Exposure Index	122.19 %
Percent of Fish Exposed	82.4 %
Number of Days Fish Exposed	28

Middle 50% of Run Period (May 14 - Jun 1)
TDG Percent Exposure Index	122.21 %
Percent of Fish Exposed	88.2 %
Number of Days Fish Exposed	16

Run Dates
First Day of Run	Mar 22
5% of Run passed	May 7
10% of Run passed	May 10
50% of Run passed	May 20
90% of Run passed	Jun 16
95% of Run passed	Jun 19
Last Day of Run	Jun 27

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 [99.958] is less than total observed during the period [100]. Only fish observed on days with River Parameter data are analyzed.