Columbia Basin Performance Measures

Sample Exposure Summary Tables for Multiple Projects: Adult Sockeye

• Year 2024
• River Parameter Temperature Tailrace
• Critical Temperature Tailrace Value 20 °C
• Exposure Calculated Above Critical Value

Bonneville Summary

Total Run Period (May 18 - Sep 29)

Total Number of Fish Observed	755909
Percent of Total Run Analyzed [Number Observed]	100 % [755910]1
Temperature Tailrace Exposure Index	18.11 °C
Percent of Fish Exposed [Number Exposed]	13.6 % [103202]
Number of Days Fish Exposed	57

Middle 80% of Run Period (Jun 18 - Jul 8)

Number of Fish Observed	612845
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [612845]
Temperature Tailrace Exposure Index	17.99 °C
Percent of Fish Exposed [Number Exposed]	4.8 % [29871]
Number of Days Fish Exposed	2

Run Dates

First Day of Run	May 18
5% of Run passed	Jun 15
10% of Run passed	Jun 18
50% of Run passed	Jun 27
90% of Run passed	Jul 8
95% of Run passed	Jul 11
Last Day of Run	Sep 29

Date(s) When Temperature Tailrace Crosses 20 °C

Jul 7

Sep 14

McNary Summary

Total Run Period (Apr 14 - Oct 12)

Total Number of Fish Observed	650945
Percent of Total Run Analyzed [Number Observed]	100 % [650945]
Temperature Tailrace Exposure Index	18.24 °C
Percent of Fish Exposed [Number Exposed]	12.1 % [78851]
Number of Days Fish Exposed	67

Middle 80% of Run Period (Jun 22 - Jul 12)

Number of Fish Observed	533574
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [533574]
Temperature Tailrace Exposure Index	18.21 °C
Percent of Fish Exposed [Number Exposed]	2.9 % [15821]
Number of Days Fish Exposed	1

Run Dates

First Day of Run	Apr 14
5% of Run passed	Jun 20
10% of Run passed	Jun 22
50% of Run passed	Jul 1
90% of Run passed	Jul 12
95% of Run passed	Jul 15
Last Day of Run	Oct 12

Date(s) When Temperature Tailrace Crosses 20 °C

Jul 12

Sep 18

Lower Granite Summary

Total Run Period (Jun 24 - Oct 13)

Total Number of Fish Observed	2947
Percent of Total Run Analyzed [Number Observed]	100 % [2947]
Temperature Tailrace Exposure Index	19.51 °C
Percent of Fish Exposed [Number Exposed]	15.1 % [445]
Number of Days Fish Exposed	10

Middle 80% of Run Period (Jul 11 - Aug 8)

Number of Fish Observed	2371
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [2371]
Temperature Tailrace Exposure Index	19.58 °C
Percent of Fish Exposed [Number Exposed]	16.2 % [386]
Number of Days Fish Exposed	7

Run Dates

First Day of Run	Jun 24
5% of Run passed	Jul 7
10% of Run passed	Jul 11
50% of Run passed	Jul 23
90% of Run passed	Aug 8
95% of Run passed	Aug 15
Last Day of Run	Oct 13

Date(s) When Temperature Tailrace Crosses 20 °C

Jul 16

Jul 19

Aug 5

Aug 12