Natural Dam P-2851

General information
Waterway	Oswegatchie 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-2851
FERC project name	Natural Dam
Permit issued	9/1/11
Permit expiration	4/27/52
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