Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2025
Project	Ice Harbor
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 (Jan 1 - Jun 30)

Total Number of Fish Observed	371
Percent of Total Run Analyzed [Number Observed]	100 % [371]
Temperature Tailrace Exposure Index	12.37 °C
Percent of Fish Exposed [Number Exposed]	6.7 % [25]
Number of Days Fish Exposed	15

Middle 80% of Run Period (Apr 11 - May 25)

Number of Fish Observed	304
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [304]
Temperature Tailrace Exposure Index	12.37 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 22 - May 18)

Number of Fish Observed	200
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [200]
Temperature Tailrace Exposure Index	12.79 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Jan 1
5% of Run passed	Apr 1
10% of Run passed	Apr 11
50% of Run passed	May 9
90% of Run passed	May 25
95% of Run passed	Jun 4
Last Day of Run	Jun 30

Date(s) When Temperature Tailrace Crosses 15 °C

May 31