Green Island Hydroelectric Station P-13

General information

Waterway  Hudson River
Current status   Active license 
Type of facility Conventional Hydro
Mode of hydropower generation Run-of-river
Type of permit FERC License

FERC information

FERC docket # P-13
FERC project name Green Island
Permit issued 8/12/12
Permit expiration 7/27/62

Ownership and operation

Owner Albany Engineering Corporation
Owner type Private non-utility
Year first online (conventional hydro) 1922
Transmission or distribution system owner Niagara Mohawk Power Corp.

Power and generating capacity

Number of units 4
Total capacity from hydraulic turbine-generator units within each plant 6.0 mW
Average annual net hydropower generation 38,764.3 mWH

Download license summary for the Green Island project.

The Green Island hydropower project is located on the west end of the Federal Dam, the first dam on the Hudson River in New York, five miles north of Albany. The Federal Dam is owned and operated by the USACE while the project is operated by Green Island Power Authority (GIPA). In its renewed license in 2012, GIPA was authorized to modify the dam and the powerhouse and increase the capacity from 6 MW to 48 MW.

Existing hydropower facilities consist of: (1) 2-foot-high, pneumatically operated flashboards on the Corps’ main spillway that maintain a 700-acre impoundment with a normal water surface elevation of 16.33 feet msl;11 (2) a forebay leading to a powerhouse located at the west end of Troy Dam containing four 1.5-MW generating units with a total installed capacity of 6.0 MW; and (3) a 140-foot-long, 13.8-kilovolt (kV) transmission line. The project bypasses a 750-foot-long section of the Hudson River.

The license accompanies a 2010 settlement executed by Green Island Power Authority (GIPA), U.S. Fish and Wildlife Service (USFWS), National Marine Fisheries Service (NMFS), and New York State Department of Environmental Conservation (NYSDEC).

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