Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook Query Parameters

Year	2025
Project	McNary
River Parameter	Temperature Tailrace
Critical Temperature Tailrace Value	15 °C
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	3/15 - 6/15

Total Run Period (Apr 1 - Jun 15)

Total Number of Fish Observed	79159
Percent of Total Run Analyzed [Number Observed]	100 % [79159]
Temperature Tailrace Exposure Index	13.91 °C
Percent of Fish Exposed [Number Exposed]	26.1 % [20723]
Number of Days Fish Exposed	19

Middle 80% of Run Period (May 4 - Jun 10)

Number of Fish Observed	64345
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [64345]
Temperature Tailrace Exposure Index	13.72 °C
Percent of Fish Exposed [Number Exposed]	20.3 % [13072]
Number of Days Fish Exposed	14

Middle 50% of Run Period (May 9 - May 29)

Number of Fish Observed	41995
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [41995]
Temperature Tailrace Exposure Index	13.37 °C
Percent of Fish Exposed [Number Exposed]	5.5 % [2317]
Number of Days Fish Exposed	2

Run Dates

First Day of Run	Apr 1
5% of Run passed	May 1
10% of Run passed	May 4
50% of Run passed	May 16
90% of Run passed	Jun 10
95% of Run passed	Jun 13
Last Day of Run	Jun 15

Date(s) When Temperature Tailrace Crosses 15 °C

May 28