Project Name: Crescent Hydroelectric Project
Summary: Telemetry studies and redesign of fish barrier system
Client: New York Power Authority
Project Location: Colonie, NY
Project Size: 9.9 MW
• Fish Barrier Effectiveness Study
• Fish Barrier System Design
Project Timeframe: 2007 - 2010
Relationship with Client: Since 1994
To reduce entrainment of post-spawned blueback herring, the New York Power Authority (NYPA) installed an array of high-frequency acoustic transducers at the entrance to the headrace of the Crescent Hydroelectric Project powerhouse. NYPA required telemetry studies to assess the effectiveness of the sound barrier system to understand its effectiveness and to determine if redesign would be appropriate.
Kleinschmidt was selected to conduct a pilot study to find out whether post-spawned blueback herring could be implanted with a radio transmitter with minimal mortality; if radio tagged blueback herring would mix with schools of untagged blueback herring; and whether hydroacoustic gear and radio telemetry could be used to verify that the transducer array at the entrance to the Crescent headrace repelled adult blueback herring. As a result of the pilot study, Kleinschmidt determined that all three of NYPA’s stated study goals were feasible. Kleinschmidt then conducted a full-scale telemetry study using mobile and fixed-location equipment to assess the effectiveness of the sound deterrent system in guiding post-spawned blueback herring as they migrate downriver. Based on the study results, Kleinschmidt worked with NYPA to redesign the existing mounting brackets, review the electrical capacity of the site for additional acoustic transducers, prepared technical specifications, and prepared an opinion of probable cost for redesign.
NYPA was able to reduce entrainment of adult blueback herring because of the reconfigurations made to the existing fish guidance system based on Kleinschmidt’s effectiveness testing and design modifications.