Mactaquac Dam

Mactaquac Dam
Mactaquac Dam in January 2005 seen from west bank of Saint John River on downstream side.
Mactaquac Dam in New Brunswick.
Official name	Mactaquac Generating Station
Country	Canada
Location	Bright Parish / Kingsclear Parish, York County, New Brunswick
Coordinates	45°57′15.2″N 66°52′5.8″W / 45.954222°N 66.868278°W / 45.954222; -66.868278
Status	Operational
Construction began	1965; 59 years ago (1965)
Opening date	1968; 56 years ago (1968)
Owner(s)	NB Power
Dam and spillways
Type of dam	Embankment dam
Impounds	Saint John River
Height	55 m (180 ft)
Length	518 m (1,699 ft)
Spillways	2
Spillway type	Concrete
Spillway capacity	16,282.18679 m3 (575,000.000 cu ft) per second
Reservoir
Creates	Mactaquac Headpond
Total capacity	1,307,491,000 m3 (4.61736×1010 cu ft)
Surface area	83.85 km2 (20,720 acres)
Maximum water depth	39.624 m (130.00 ft)
Power Station
Type	Run-of-the-river
Hydraulic head	31.7 m (104 ft) - 35.4 m (116 ft)
Turbines	6 x Kaplan
Installed capacity	653 MW
Annual generation	1,600 GWh (5,800 TJ)

The Mactaquac Dam is an embankment dam used to generate hydroelectricity in Mactaquac, New Brunswick. It dams the waters of the Saint John River and is operated by NB Power with a capacity to generate 670 megawatts of electricity from 6 turbines; this represents 20 percent of New Brunswick's power demand.