Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook 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	3/15 - 6/15

Total Run Period (Mar 21 - Jun 15)

Total Number of Fish Observed	100411
Percent of Total Run Analyzed [Number Observed]	100 % [100411]
Tailrace TDG Percent Exposure Index	118.07 %
Percent of Fish Exposed [Number Exposed]	21.1 % [21247]
Number of Days Fish Exposed	13

Middle 80% of Run Period (Apr 30 - Jun 10)

Number of Fish Observed	82955
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [82955]
Tailrace TDG Percent Exposure Index	118.47 %
Percent of Fish Exposed [Number Exposed]	23.7 % [19674]
Number of Days Fish Exposed	6

Middle 50% of Run Period (May 5 - May 28)

Number of Fish Observed	53573
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [53573]
Tailrace TDG Percent Exposure Index	118.65 %
Percent of Fish Exposed [Number Exposed]	36.7 % [19674]
Number of Days Fish Exposed	6

Run Dates

First Day of Run	Mar 21
5% of Run passed	Apr 27
10% of Run passed	Apr 30
50% of Run passed	May 12
90% of Run passed	Jun 10
95% of Run passed	Jun 12
Last Day of Run	Jun 15

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