Juvenile Alewife Passage through a Compact Hydropower Turbine Designed for Fish Safety

Hydropower is a valuable renewable energy source, but its effects on the downstream passage of many riverine fish species are not well understood. Turbines that designed to function as safe routes for being developed with goal mitigating hydropower operations environment. In this paper, we present results study conducted juvenile life stage Alewife Alosa pseudoharengus, major migratory Atlantic coast North America. The test was at small plant located in Freedom, Maine, single Restoration Hydro Turbine (RHT) operating under 7.5 m gross head. Groups 140–170 were released into intake 55-cm-diameter RHT and recaptured specialized trap turbine discharge outlet. combined immediate 48-h survival rates (±95% CI) all treatments, corrected control mortality, 98.2 ± 2.0% 100.0 6.6%, respectively. Alewives through runner region also captured high-speed video. demonstrate RHT, which safety, an effective way pass alosines facilities.