Adult PIT-tag Interrogation System Wells Hydroelectric Project (System Design, Installation and Evaluation) Shane Bickford* Public Utility District No. 1 of Douglas County. East Wenatchee, Washington John Skalski and Rich Townsend School of Aquatic and Fisheries Science. University of Washington Seattle, Washington Scott McCutcheon and Ryan Richmond Biomark Inc. Biose, Idaho
Outline Unique Features of Wells Dam System Design Installation Evaluation Methodology Results
Map courtesy of the US Army Corps
Features of the Wells Hydrocombine Switchyard 10 Kaplan Turbine Units 840 MW Capacity 2 Adult Fishways
Features of the Wells Hydrocombine 11 Spillways 5 Fish Bypass Systems
Adult PIT Project Design mikeb 2/25/2019
Adult PIT - Design Concerns Avoid Overflow weirs. Install in noise free environments. Prevent leakage of water into coils. Do not impede fish passage. The smaller the orifice diameter the better the detection rate.
Project Goals Install Prototype Adult PIT-tag detection equipment in both fishways at Wells Dam (winter of 2001-02). Evaluate detectors during the 2002 adult migration. Fall 2002: Determine whether additional detectors are needed and whether prototype design is appropriate for site.
Wells Ladder Cross Section
Control Weirs: Adult PIT Coil Site Pool 68-67
Downstream View of Orifice – Weir 68 Width 17” Height 30”
Downstream View of Orifice – Weir 68 Width 29” Chamfer 6”
Downstream View of Orifice – Weir 68 Height 42”
Upstream Face of Orifice – Weir 68 Chamfer 1.5” Chamfer 0.5” Width 21”
Upstream Face of Orifice – Weir 68 Height 34”
RF coil back side RF coil upstream view
Coil mounted on Weir 68, left bank orifice.
Weir 68 coils completed and ready to tune.
Communication Infrastructure
Interrogation System Goals 99% Detection Efficiency for tagged adult salmon and steelhead by the spring of 2003. Real-time Data feed to PSMFC database. Do not impede or delay fish passage.
Interrogation Evaluation Goals Estimate detection rates for sockeye tagged at Wells Dam as adults. Estimate detection rates for run-of-river sockeye, steelhead, chinook and coho. Determine whether there are species specific difference in detection rates. Determine whether the adult PIT interrogations system impedes or delays adult fish passage.
Sockeye tagged at east ladder trap at Wells Dam
Interrogation System Results* Wells Tagged Adults: 0.9998 (0.9990-1.0000) Run-of-River Adults: Chinook (0.9977-1.0000) Coho (1.0000) Steelhead (0.9899-1.0000) Sockeye (1.0000) East Ladder: (0.9959-1.0000) West Ladder: (0.9990-1.0000) No significant differences in the rates of detection by species or between the east and west ladders. * All results reported with a 95% Confidence Interval
Interrogation System Adult Passage/Travel Time Results No increased incidence of fallback within the ladders. No obvious accumulations of fish downstream of coils. Per Weir Travel Time: Chinook (1.642 – 1.350) Coho (1.325 - 0.792) Steelhead (0.983 – 0.892) Sockeye (5.183 – 1.675) Per Weir travel times not significantly different before and after installation of adult PIT-system.
Conclusions Detection rates for all species exceeded the preseason goal of 99%. Real-time data feed to PSMFC successful. No increase in travel time, delay or rate of fallback within the ladder observed in 2002 or 2003. No need to modify the existing in-ladder system.
Conclusions (Continued) No leakage into coils. Noise events can be intense but are very short and infrequent. Recommendation to install automated detectors at brood collection traps located downstream of the PIT-detectors.
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