Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2025
Project	Little Goose
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 28 - Jun 22)

Total Number of Fish Observed	536
Percent of Total Run Analyzed [Number Observed]	100 % [536]
Temperature Tailrace Exposure Index	11.48 °C
Percent of Fish Exposed [Number Exposed]	3.3 % [18]
Number of Days Fish Exposed	11

Middle 80% of Run Period (Apr 7 - May 19)

Number of Fish Observed	442
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [442]
Temperature Tailrace Exposure Index	11.53 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 20 - May 13)

Number of Fish Observed	293
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [293]
Temperature Tailrace Exposure Index	11.94 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 28
5% of Run passed	Apr 2
10% of Run passed	Apr 7
50% of Run passed	May 4
90% of Run passed	May 19
95% of Run passed	May 24
Last Day of Run	Jun 22

Date(s) When Temperature Tailrace Crosses 15 °C

May 30