Columbia Basin Performance Measures

Adult Passage Exposure Results

Adult Chinook Query Parameters

Year	2024
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 1 - Jun 15)

Total Number of Fish Observed	47097
Percent of Total Run Analyzed [Number Observed]	100 % [47097]
Tailrace TDG Percent Exposure Index	117.9 %
Percent of Fish Exposed [Number Exposed]	26.7 % [12585]
Number of Days Fish Exposed	7

Middle 80% of Run Period (May 6 - Jun 4)

Number of Fish Observed	38452
Percent of Middle 80% of Run Analyzed [Number Observed]	100 % [38452]
Tailrace TDG Percent Exposure Index	118.06 %
Percent of Fish Exposed [Number Exposed]	30.8 % [11844]
Number of Days Fish Exposed	5

Middle 50% of Run Period (May 11 - May 21)

Number of Fish Observed	24143
Percent of Middle 50% of Run Analyzed [Number Observed]	100 % [24143]
Tailrace TDG Percent Exposure Index	118.94 %
Percent of Fish Exposed [Number Exposed]	46.8 % [11321]
Number of Days Fish Exposed	4

Run Dates

First Day of Run	Apr 1
5% of Run passed	May 3
10% of Run passed	May 6
50% of Run passed	May 15
90% of Run passed	Jun 4
95% of Run passed	Jun 9
Last Day of Run	Jun 15

Date(s) When Tailrace TDG Percent Crosses 120 %

May 15

May 19

Jun 4

Jun 5

Jun 7

Jun 8

Jun 9

Jun 10