Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2025
Project	John Day
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	99463
Percent of Total Run Analyzed [Number Observed]	100 % [99463]
Tailrace TDG Percent Exposure Index	101.8 %
Percent of Fish Exposed [Number Exposed]	0.1 % [192]
Number of Days Fish Exposed	2

Middle 80% of Run Period (Aug 3 - Oct 16)

Number of Fish Observed	79894
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [79894]
Tailrace TDG Percent Exposure Index	100.69 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Sep 14 - Oct 6)

Number of Fish Observed	50744
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [50744]
Tailrace TDG Percent Exposure Index	99.59 %
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 13
10% of Run passed	Aug 3
50% of Run passed	Sep 24
90% of Run passed	Oct 16
95% of Run passed	Oct 22
Last Day of Run	Oct 31

Date(s) When Tailrace TDG Percent Crosses 120 %

Jul 31

Aug 2