Improvement of Dissolved Oxygen Levels at Shepaug Hydro Station

by Peter Rodrigue, Acres Int Corp, United States,
Fred Szufnarowski, Acres Int Corp, United States,
James Tanner, Acres Int Corp, United States,

Document Type: Proceeding Paper

Part of: Waterpower '89


Discharge from Shepaug Dam in Connecticut fall below the state standard for dissolved oxygen in summer and early fall, because of thermal stratification of the upstream eutrophic reservoir. A study of methods of increasing dissolved oxygen in the Shepaug discharges was performed. Alternatives considered included reservoir destratification, spillway releases, intake modifications, turbine air injection, oxygen injection, and adding a new generating unit with a high level intake. The various options were assessed from an economic and environmental point of view. The two most attractive schemes were assessed using a mathematical water quality model, and the intake modification option was selected for more detailed evaluation.

Subject Headings: Dissolved oxygen | Power plants | Hydro power | Spillways | Water discharge | Hydrologic models | Thermal power | Oxygen | Connecticut | United States

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