FERC issues preliminary permit for 250-kW Manville Dam Project

Federal Energy Regulatory Commission

The Federal Energy Regulatory Commission has issued a preliminary permit to One Drop Hydro LLC to study the feasibility of the 250-kW Manville Dam Project in Providence County, Rhode Island.

The proposed Manville Dam project, on the Blackstone River, would consist of the existing 246-foot-long, 18-foot-high stone masonry, arch-gravity Manville Dam, with a crest elevation of 105.72 feet North American Vertical Datum of 1988 (NAVD88); an existing impoundment with a surface area of 2.83 acres and a total storage capacity of 45.45 acre-feet at a surface elevation of 106.22 feet NAVD88; two 125-kW siphon Kaplan turbine-generator units; a new transformer and 528-foot-long, 13-kV transmission line connecting the turbine-generator units to the regional grid; and (5) appurtenant facilities.

The estimated annual generation of the project would be 1,839 MWh.

One Drop Hydro filed the application in November 2020. The preliminary permit is effective May 1, 2021, and lasts for 48 months.

The purpose of a preliminary permit is to preserve the right of the permit holder to have the first priority in applying for a license for the project that is being studied.

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