Columbia Basin Performance Measures

PIT Tag Exposure Results

graph

PIT-Tagged Wild Summer Steelhead Query Parameters
Year2018
ProjectJohn Day
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value120 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates1/1 - 12/31
Total Run Period (Feb 28 - Jun 17)
Total Number of Fish Observed2889
Percent of Total Run Analyzed [Number Observed]100 % [2889]
Tailrace TDG Percent Exposure Index124.3 %
Percent of Fish Exposed [Number Exposed]67.4 % [1949]
Number of Days Fish Exposed28
Middle 80% of Run Period (Apr 23 - May 27)
Number of Fish Observed2353
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [2353]
Tailrace TDG Percent Exposure Index125.55 %
Percent of Fish Exposed [Number Exposed]75.4 % [1776]
Number of Days Fish Exposed24
Middle 50% of Run Period (May 2 - May 18)
Number of Fish Observed1503
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [1503]
Tailrace TDG Percent Exposure Index125.92 %
Percent of Fish Exposed [Number Exposed]82.5 % [1240]
Number of Days Fish Exposed14
Run Dates
First Day of RunFeb 28
5% of Run passedApr 18
10% of Run passedApr 23
50% of Run passedMay 10
90% of Run passedMay 27
95% of Run passedMay 30
Last Day of RunJun 17
Date(s) When Tailrace TDG Percent Crosses 120 %
May 1, May 2, May 5, May 31, Jun 1, Jun 2