Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2025
Project	Ice Harbor
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 2 - Dec 31)

Total Number of Fish Observed	86984
Percent of Total Run Analyzed [Number Observed]	100 % [86984]
Tailrace TDG Percent Exposure Index	103.51 %
Percent of Fish Exposed [Number Exposed]	0 % [5]
Number of Days Fish Exposed	3

Middle 80% of Run Period (Aug 31 - Oct 26)

Number of Fish Observed	69907
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [69907]
Tailrace TDG Percent Exposure Index	103.15 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Sep 20 - Oct 12)

Number of Fish Observed	44989
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [44989]
Tailrace TDG Percent Exposure Index	103.06 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 2
5% of Run passed	Jul 20
10% of Run passed	Aug 31
50% of Run passed	Oct 1
90% of Run passed	Oct 26
95% of Run passed	Nov 9
Last Day of Run	Dec 31

Date(s) When Tailrace TDG Percent Crosses 120 %

May 11

May 15