Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook Query Parameters

Year	2024
Project	Lower Granite
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 9 - Jun 15)

Total Number of Fish Observed	44748
Percent of Total Run Analyzed [Number Observed]	100 % [44748]
Temperature Tailrace Exposure Index	13.17 °C
Percent of Fish Exposed [Number Exposed]	6.9 % [3126]
Number of Days Fish Exposed	6

Middle 80% of Run Period (May 13 - Jun 7)

Number of Fish Observed	36407
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [36407]
Temperature Tailrace Exposure Index	13.08 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Middle 50% of Run Period (May 16 - May 26)

Number of Fish Observed	22956
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [22956]
Temperature Tailrace Exposure Index	12.76 °C
Percent of Fish Exposed [Number Exposed]	0 % [0]
Number of Days Fish Exposed	0

Run Dates

First Day of Run	Apr 9
5% of Run passed	May 9
10% of Run passed	May 13
50% of Run passed	May 19
90% of Run passed	Jun 7
95% of Run passed	Jun 11
Last Day of Run	Jun 15

Date(s) When Temperature Tailrace Crosses 15 °C

Jun 10