Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Spring/Summer Chinook Query Parameters

Year	2024
Project	Little Goose
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 (Apr 2 - Jul 17)

Total Number of Fish Observed	1471
Percent of Total Run Analyzed [Number Observed]	100 % [1471]
Tailrace TDG Percent Exposure Index	119.36 %
Percent of Fish Exposed [Number Exposed]	25 % [369]
Number of Days Fish Exposed	26

Middle 80% of Run Period (Apr 16 - May 20)

Number of Fish Observed	1222
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [1222]
Tailrace TDG Percent Exposure Index	119.29 %
Percent of Fish Exposed [Number Exposed]	21.2 % [260]
Number of Days Fish Exposed	9

Middle 50% of Run Period (Apr 18 - May 9)

Number of Fish Observed	809
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [809]
Tailrace TDG Percent Exposure Index	118.46 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Apr 2
5% of Run passed	Apr 13
10% of Run passed	Apr 16
50% of Run passed	Apr 23
90% of Run passed	May 20
95% of Run passed	Jun 2
Last Day of Run	Jul 17

Date(s) When Tailrace TDG Percent Crosses 120 %

Apr 13

Apr 17

May 13

May 21

May 24

May 25

May 30

May 31

Jun 1

Jun 14