Mactaquac Dam
| Mactaquac Dam | |
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Mactaquac Dam in January 2005 seen from west bank of Saint John River on downstream side.
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 Mactaquac Dam in New Brunswick.
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| 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°WCoordinates: 45°57′15.2″N 66°52′5.8″W / 45.954222°N 66.868278°W |
| Status | Operational |
| Construction began | 1965 |
| Opening date | 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 |
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.
Formally called the Mactaquac Generating Station, the dam and power house are located approximately 19 km (12 mi) upstream from the city of Fredericton. The dam is an embankment dam consisting of a rock-fill structure sealed by clay. It combines with two concrete spill-ways to form an arch across a narrow section of the river between the communities of Kingsclear on the west bank, and Keswick Ridge on the east bank.
Rising 40 metres in height above the river level, the reservoir (referred to locally as the "head pond") covers 87 square kilometres and extends 96 kilometres upstream, near . The dam and powerhouse are a "run of the river" design, meaning that the reservoir has no additional holding capacity in the event of unusually high water flows, such as during the spring freshet.
Kingsclear, NB is also the site of an Atlantic Salmon fish hatchery, located immediately downstream from the dam. The Mactaquac Dam also has a fishway to catch salmon and transport them upriver.
The dam also serves as a locally important public road bridge across the Saint John River, linking provincial highways 102 and 105 on the south and north sides of the river.
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Wikipedia