Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2025
Project	The Dalles
River Parameter	Tailrace TDG Percent
Critical Tailrace TDG Percent Value	120 %
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	1/1 - 12/31

Total Run Period (Mar 1 - Dec 31)

Total Number of Fish Observed	132085
Percent of Total Run Analyzed [Number Observed]	100 % [132085]
Tailrace TDG Percent Exposure Index	105.06 %
Percent of Fish Exposed [Number Exposed]	1 % [1397]
Number of Days Fish Exposed	12

Middle 80% of Run Period (Jul 20 - Oct 13)

Number of Fish Observed	107486
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [107486]
Tailrace TDG Percent Exposure Index	104.7 %
Percent of Fish Exposed [Number Exposed]	1.2 % [1381]
Number of Days Fish Exposed	1

Middle 50% of Run Period (Aug 22 - Sep 28)

Number of Fish Observed	66624
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [66624]
Tailrace TDG Percent Exposure Index	104.1 %
Percent of Fish Exposed [Number Exposed]	2 % [1381]
Number of Days Fish Exposed	1

Run Dates

First Day of Run	Mar 1
5% of Run passed	Jul 11
10% of Run passed	Jul 20
50% of Run passed	Sep 14
90% of Run passed	Oct 13
95% of Run passed	Oct 21
Last Day of Run	Dec 31

Date(s) When Tailrace TDG Percent Crosses 120 %

Apr 14

Apr 19

Apr 23

Apr 24

Apr 25

Apr 26

May 6

May 7

May 9

May 13

May 28

May 29

Sep 7

Sep 8