Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2024
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 (Apr 1 - Oct 31)

Total Number of Fish Observed	155330
Percent of Total Run Analyzed [Number Observed]	100 % [155330]
Tailrace TDG Percent Exposure Index	105.54 %
Percent of Fish Exposed [Number Exposed]	0 % [12]
Number of Days Fish Exposed	2

Middle 80% of Run Period (Jul 23 - Oct 2)

Number of Fish Observed	124716
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [124716]
Tailrace TDG Percent Exposure Index	104.86 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Aug 26 - Sep 21)

Number of Fish Observed	82380
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [82380]
Tailrace TDG Percent Exposure Index	104.83 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Apr 1
5% of Run passed	Jul 9
10% of Run passed	Jul 23
50% of Run passed	Sep 9
90% of Run passed	Oct 2
95% of Run passed	Oct 12
Last Day of Run	Oct 31

Date(s) When Tailrace TDG Percent Crosses 120 %

Jun 6

Jun 8