Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2024
Project	Lower Granite
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 21 - Dec 2)

Total Number of Fish Observed	8202
Percent of Total Run Analyzed [Number Observed]	100 % [8202]
Temperature Tailrace Exposure Index	12.5 °C
Percent of Fish Exposed [Number Exposed]	1.8 % [152]
Number of Days Fish Exposed	21

Middle 80% of Run Period (Apr 24 - May 31)

Number of Fish Observed	6714
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [6714]
Temperature Tailrace Exposure Index	12.59 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (May 3 - May 18)

Number of Fish Observed	4381
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [4381]
Temperature Tailrace Exposure Index	13.03 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 21
5% of Run passed	Apr 17
10% of Run passed	Apr 24
50% of Run passed	May 15
90% of Run passed	May 31
95% of Run passed	Jun 5
Last Day of Run	Dec 2

Date(s) When Temperature Tailrace Crosses 15 °C

Jun 10

Jun 21

Jun 22

Oct 27