Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Spring/Summer Chinook Query Parameters

Year	2024
Project	John Day
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 18 - Dec 18)

Total Number of Fish Observed	863
Percent of Total Run Analyzed [Number Observed]	100 % [863]
Tailrace TDG Percent Exposure Index	114.95 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 80% of Run Period (Apr 23 - Jun 6)

Number of Fish Observed	702
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [702]
Tailrace TDG Percent Exposure Index	114.95 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 29 - May 24)

Number of Fish Observed	462
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [462]
Tailrace TDG Percent Exposure Index	115.06 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 18
5% of Run passed	Apr 19
10% of Run passed	Apr 23
50% of Run passed	May 8
90% of Run passed	Jun 6
95% of Run passed	Jun 15
Last Day of Run	Dec 18

Date(s) When Tailrace TDG Percent Crosses 120 %

Jul 17

Jul 18

Oct 9

Oct 11