Columbia Basin Performance Measures

PIT Tag Exposure Results

PIT-Tagged Wild Summer Steelhead Query Parameters

Year	2025
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 25 - Jun 19)

Total Number of Fish Observed	451
Percent of Total Run Analyzed [Number Observed]	100 % [451]
Tailrace TDG Percent Exposure Index	114.91 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 80% of Run Period (Apr 5 - May 23)

Number of Fish Observed	368
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [368]
Tailrace TDG Percent Exposure Index	115.34 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (Apr 16 - May 17)

Number of Fish Observed	236
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [236]
Tailrace TDG Percent Exposure Index	116.04 %
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Mar 25
5% of Run passed	Apr 1
10% of Run passed	Apr 5
50% of Run passed	May 4
90% of Run passed	May 23
95% of Run passed	May 29
Last Day of Run	Jun 19