St. Margaret's Bay Hydroelectric System

St. Margaret's Bay Hydroelectric System
Country Canada
Location Halifax Regional Municipality, Nova Scotia
Coordinates 44°41′29″N 63°53′30″W / 44.69145°N 63.8917°W / 44.69145; -63.8917Coordinates: 44°41′29″N 63°53′30″W / 44.69145°N 63.8917°W / 44.69145; -63.8917
Status Operational
Commission date 8 June 1922
Owner(s) Emera
Operator(s) Nova Scotia Power
Thermal power station
Primary fuel Hydropower
Power generation
Units operational 2 x 6 MW + 2 x 2.9 MW[1]
Nameplate capacity 17.8 MW
Annual net output 30 GWh[1]

The St. Margaret's Bay Hydroelectric System is two hydroelectric power plants and the related system driving them. Outflow is into St. Margarets Bay, Nova Scotia between Head of St. Margarets Bay and Tantallon.

Commissioned 8 June 1922, it is the oldest hydro plant in Nova Scotia. The system is owned and operated by Nova Scotia Power. The two plants use water from Five Mile Lake, Big Indian Lake, Sandy Lake, Wrights Lake, Coon Pond, Mill Lake and, at times, an overflow from Pockwock Lake. The system was upgraded in 2012 with $17.8 million of work to replace the old wooden penstock in fibreglass, a new water surge tank, a new dam at Mill Lake, a new gatehouse and gate at Mill Lake, and new floating booms to keep debris away from the dams. The system has an annual output of 30 Gigawatt hours of electricity from two .6 MW generators at Mill Lake and two 2.9 MW generators at the Tidewater plant.[1]

References

  1. 1 2 3 Ayling, Keith (18 June 2014). "St Margaret's Bay Power Plant Opens its System to Public" (pdf). Masthead News. p. 12. Retrieved 16 November 2014.


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