Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead 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	1/1 - 12/31

Total Run Period (Mar 27 - Jun 16)

Total Number of Fish Observed	356
Percent of Total Run Analyzed [Number Observed]	100 % [356]
Temperature Tailrace Exposure Index	11.16 °C
Percent of Fish Exposed [Number Exposed]	6.1 % [22]
Number of Days Fish Exposed	11

Middle 80% of Run Period (Apr 2 - May 23)

Number of Fish Observed	290
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [290]
Temperature Tailrace Exposure Index	11.05 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 8 - May 18)

Number of Fish Observed	194
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [194]
Temperature Tailrace Exposure Index	11.25 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 27
5% of Run passed	Mar 30
10% of Run passed	Apr 2
50% of Run passed	Apr 30
90% of Run passed	May 23
95% of Run passed	May 29
Last Day of Run	Jun 16

Date(s) When Temperature Tailrace Crosses 15 °C

May 28