Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook Query Parameters

Year	2024
Project	John Day
River Parameter	Temperature Tailrace
Critical Temperature Tailrace Value	15 °C
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	3/15 - 6/15

Total Run Period (Apr 1 - Jun 15)

Total Number of Fish Observed	80800
Percent of Total Run Analyzed [Number Observed]	100 % [80800]
Temperature Tailrace Exposure Index	13.18 °C
Percent of Fish Exposed [Number Exposed]	12.9 % [10445]
Number of Days Fish Exposed	9

Middle 80% of Run Period (Apr 30 - Jun 10)

Number of Fish Observed	66371
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [66371]
Temperature Tailrace Exposure Index	13.03 °C
Percent of Fish Exposed [Number Exposed]	4.8 % [3208]
Number of Days Fish Exposed	4

Middle 50% of Run Period (May 6 - May 23)

Number of Fish Observed	44646
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [44646]
Temperature Tailrace Exposure Index	12.81 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Apr 1
5% of Run passed	Apr 26
10% of Run passed	Apr 30
50% of Run passed	May 12
90% of Run passed	Jun 10
95% of Run passed	Jun 13
Last Day of Run	Jun 15

Date(s) When Temperature Tailrace Crosses 15 °C

Jun 7