Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Spring/Summer Chinook Query Parameters

Year	2024
Project	McNary
River Parameter	Temperature Tailrace
Critical Temperature Tailrace Value	15 °C
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	1/1 - 12/31

Total Run Period (Mar 30 - Aug 7)

Total Number of Fish Observed	1887
Percent of Total Run Analyzed [Number Observed]	100 % [1887]
Temperature Tailrace Exposure Index	11.41 °C
Percent of Fish Exposed [Number Exposed]	3 % [58]
Number of Days Fish Exposed	24

Middle 80% of Run Period (Apr 15 - May 20)

Number of Fish Observed	1528
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [1528]
Temperature Tailrace Exposure Index	11.32 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 22 - May 8)

Number of Fish Observed	988
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [988]
Temperature Tailrace Exposure Index	11.07 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 30
5% of Run passed	Apr 8
10% of Run passed	Apr 15
50% of Run passed	Apr 28
90% of Run passed	May 20
95% of Run passed	May 28
Last Day of Run	Aug 7

Date(s) When Temperature Tailrace Crosses 15 °C

Jun 8