Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook Query Parameters

Year	2025
Project	Ice Harbor
River Parameter	Tailrace TDG Percent
Critical Tailrace TDG Percent Value	120 %
Calculate Exposure	Above Critical Value
River Parameter Data Fill	No
Query Dates	3/15 - 6/15

Total Run Period (Apr 7 - Jun 15)

Total Number of Fish Observed	52783
Percent of Total Run Analyzed [Number Observed]	100 % [52783]
Tailrace TDG Percent Exposure Index	117.49 %
Percent of Fish Exposed [Number Exposed]	13.3 % [7069]
Number of Days Fish Exposed	4

Middle 80% of Run Period (May 5 - Jun 6)

Number of Fish Observed	43807
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [43807]
Tailrace TDG Percent Exposure Index	117.83 %
Percent of Fish Exposed [Number Exposed]	16.1 % [7069]
Number of Days Fish Exposed	4

Middle 50% of Run Period (May 10 - May 27)

Number of Fish Observed	28863
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [28863]
Tailrace TDG Percent Exposure Index	118.03 %
Percent of Fish Exposed [Number Exposed]	24.4 % [7069]
Number of Days Fish Exposed	4

Run Dates

First Day of Run	Apr 7
5% of Run passed	May 3
10% of Run passed	May 5
50% of Run passed	May 16
90% of Run passed	Jun 6
95% of Run passed	Jun 10
Last Day of Run	Jun 15

Date(s) When Tailrace TDG Percent Crosses 120 %

May 11

May 15