Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Steelhead Query Parameters

Year	2024
Project	Little Goose
River Parameter	Temperature Tailrace
Critical Temperature Tailrace Value	15 °C
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	1/1 - 12/31

Total Run Period (Apr 1 - Oct 31)

Total Number of Fish Observed	95619
Percent of Total Run Analyzed [Number Observed]	100 % [95619]
Temperature Tailrace Exposure Index	18.42 °C
Percent of Fish Exposed [Number Exposed]	98.8 % [94511]
Number of Days Fish Exposed	137

Middle 80% of Run Period (Sep 5 - Oct 16)

Number of Fish Observed	77783
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [77783]
Temperature Tailrace Exposure Index	18.54 °C
Percent of Fish Exposed [Number Exposed]	100 % [77783]
Number of Days Fish Exposed	42

Middle 50% of Run Period (Sep 14 - Oct 5)

Number of Fish Observed	51095
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [51095]
Temperature Tailrace Exposure Index	18.64 °C
Percent of Fish Exposed [Number Exposed]	100 % [51095]
Number of Days Fish Exposed	22

Run Dates

First Day of Run	Apr 1
5% of Run passed	Aug 23
10% of Run passed	Sep 5
50% of Run passed	Sep 26
90% of Run passed	Oct 16
95% of Run passed	Oct 22
Last Day of Run	Oct 31

Date(s) When Temperature Tailrace Crosses 15 °C

Jun 12

Oct 30