Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2024
Project	McNary
River Parameter	Tailrace TDG Percent
Critical Tailrace TDG Percent Value	120 %
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	1/1 - 12/31

Total Run Period (Mar 28 - Jun 17)

Total Number of Fish Observed	316
Percent of Total Run Analyzed [Number Observed]	100 % [316]
Tailrace TDG Percent Exposure Index	117.03 %
Percent of Fish Exposed [Number Exposed]	22.4 % [71]
Number of Days Fish Exposed	21

Middle 80% of Run Period (Apr 7 - May 28)

Number of Fish Observed	255
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [255]
Tailrace TDG Percent Exposure Index	117.43 %
Percent of Fish Exposed [Number Exposed]	20.7 % [53]
Number of Days Fish Exposed	11

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

Number of Fish Observed	162
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [162]
Tailrace TDG Percent Exposure Index	117.58 %
Percent of Fish Exposed [Number Exposed]	12.3 % [20]
Number of Days Fish Exposed	5

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 7
90% of Run passed	May 28
95% of Run passed	Jun 5
Last Day of Run	Jun 17

Date(s) When Tailrace TDG Percent Crosses 120 %

May 14

May 25

May 30

Jun 2

Jun 4

Jun 15