Centennial Lake (Renfrew County)

Centennial Lake is a reservoir lake in the Township of Greater Madawaska, Renfrew County, and the Township of North Frontenac, Frontenac County, in Eastern Ontario, Canada.[1][2][3][4] It is on the Madawaska River and is part of the Saint Lawrence River drainage basin.

Centennial Lake
Centennial Lake, looking northwest towards Griffith
Centennial Lake Location in Southern Ontario
Location	Renfrew County & Frontenac County, Ontario
Coordinates	45°09′22″N 77°03′09″W[1]
Type	Reservoir
Part of	Saint Lawrence River drainage basin
Primary inflows	Madawaska River, Mackie Creek
Primary outflows	Madawaska River
Basin countries	Canada
First flooded	1966 (1966)
Surface elevation	248 metres (814 ft)

The lake is "L" shaped, with the downstroke oriented northwest/southeast, and the cross stroke oriented northeast/southwest. All but a tiny tip at the south end of the lake, the crux of the "L", is in the Township of Greater Madawaska, Renfrew County. The major inflow, at Camel Chute at the northwest, is the Madawaska River. A second primary inflow is Mackie Creek at the south, controlled by a weir dam. The major outflow is also the Madawaska River, which flows directly into Black Donald Lake at the northeast. The Madawaska River then flows via the Ottawa River to the Saint Lawrence River and thence to the Atlantic Ocean. Renfrew County Road 65 crosses the northwest arm of the lake over a long, low, concrete bridge.