Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2025
Project	McNary
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	93313
Percent of Total Run Analyzed [Number Observed]	100 % [93313]
Tailrace TDG Percent Exposure Index	104.39 %
Percent of Fish Exposed [Number Exposed]	2.4 % [2323]
Number of Days Fish Exposed	38

Middle 80% of Run Period (Aug 10 - Oct 18)

Number of Fish Observed	76443
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [76443]
Tailrace TDG Percent Exposure Index	103.19 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Sep 17 - Oct 8)

Number of Fish Observed	47667
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [47667]
Tailrace TDG Percent Exposure Index	102.75 %
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 19
10% of Run passed	Aug 10
50% of Run passed	Sep 27
90% of Run passed	Oct 18
95% of Run passed	Oct 23
Last Day of Run	Oct 31

Date(s) When Tailrace TDG Percent Crosses 120 %

Apr 10

Apr 21

Apr 23

Apr 24

Apr 30

May 3

May 5

May 15

May 16

May 18

May 29

Jun 6

Jun 25

Jun 26

Jun 28

Jun 29

Jul 1

Jul 2

Jul 7

Jul 8

Jul 9

Jul 14

Jul 20

Jul 21

Jul 26

Jul 28