NY

Natural Dam P-2851

General information

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

FERC information

FERC docket # P-2851
FERC project name Natural Dam
Permit issued 9/1/2011
Permit expires 4/27/2052

Ownership and operation

Owner DUNN PAPER
Owner type Industrial
Year first online (conventional hydro) 1959
Transmission or distribution system owner Niagara Mohawk Power Corp.

Power and generating capacity

Number of units 3
Total capacity from hydraulic turbine-generator units within each plant 1.0 mW
Average annual net hydropower generation 5,823.1 mWH

The Natural Dam Project consists of: a 230-foot-long, 3-foot-high concrete dam with a 155-foot-long spillway equipped with a 2.2-foot-high inflatable rubber dam and a 180-foot-long auxiliary dam/spillway; a 570-acre impoundment with a normal water surface elevation of 396.0 National Geodetic Vertical Datum (NGVD) ; a 152-foot-long headpond connected to a wooden power flume; a powerhouse containing three turbines directly connected to two 300-kW and one 420-kW generating units for a total installed capacity of 1,020 kW; a tailrace; and an 80-foot-long, 23-kilovolt transmission line.

The project creates a 570-foot-long bypassed reach. There are no recreational facilities at the project.

Source: FERC

Milestones

Revised Study Plan Submitted 01-22-2008
Settlement Filed 03-04-2010