Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2024
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 (Apr 3 - Dec 31)

Total Number of Fish Observed	301
Percent of Total Run Analyzed [Number Observed]	100 % [301]
Temperature Tailrace Exposure Index	13.39 °C
Percent of Fish Exposed [Number Exposed]	16.9 % [51]
Number of Days Fish Exposed	11

Middle 80% of Run Period (Apr 24 - Jun 7)

Number of Fish Observed	242
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [242]
Temperature Tailrace Exposure Index	13.54 °C
Percent of Fish Exposed [Number Exposed]	13.2 % [32]
Number of Days Fish Exposed	3

Middle 50% of Run Period (May 4 - May 25)

Number of Fish Observed	153
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [153]
Temperature Tailrace Exposure Index	13.88 °C
Percent of Fish Exposed [Number Exposed]	19.6 % [30]
Number of Days Fish Exposed	2

Run Dates

First Day of Run	Apr 3
5% of Run passed	Apr 18
10% of Run passed	Apr 24
50% of Run passed	May 18
90% of Run passed	Jun 7
95% of Run passed	Jun 10
Last Day of Run	Dec 31

Date(s) When Temperature Tailrace Crosses 15 °C

May 20

May 22

Jun 7

Jun 9

Jun 10

Jun 12

Jun 14

Oct 30