Fourbass Lake is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in Timiskaming District

Timiskaming District, Ontario

Timiskaming is a district and census division in Northeastern Ontario in the Canadian province of Ontario. The district was created in 1912 from parts of Algoma, Nipissing, and Sudbury districts. In 1921, Cochrane District was created from parts of this district and parts of Thunder Bay...

, Ontario

Ontario

Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, about 20 kilometres (12 mi) east of Temagami

Temagami, Ontario

Temagami, formerly spelt as Timagami, is a region and a municipality in northeastern Ontario, Canada, in the District of Nipissing with Lake Temagami at its heart....

.

Hydrology

The lake is about 7.3 kilometres (4.5 mi) long and 4.3 kilometres (2.7 mi) wide and lies at an elevation of 274 metres (899 ft). The primary inflow is the Matabitchuan River

Matabitchuan River

The Matabitchuan River is a river in Nipissing and Timiskaming Districts, Ontario, Canada.-Hydrology:The river begins at Rabbit Lake in Nipissing District at an elevation of . It flows northeast over Rabbit Lake Dam and through Rabbit Chute to take in the left tributary Lorrain Creek...

, from Rabbit Lake

Rabbit Lake (Ontario)

Rabbit Lake is a lake in the Temagami region of Northeastern Ontario, Canada, and lies within the townships of Askin, Riddell, and Eldridge. The lake is the largest and southern most in a chain of lakes including Cassels Lake, Snake Island Lake, and Obashkong Lake...

 further upstream, at the southern tip. Other inflows are unnamed creeks from Cooper Lake at the east and Gorrie Lake at the west. The primary outflow is also the Matabitchuan River, at the northwest tip. A dam controls the outflow, and some of the water from the lake is diverted through penstocks

Penstock

A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydraulic turbines and sewerage systems. It is a term that has been inherited from the technology of wooden watermills....

 from a point 47°07′17"N 79°29′54"W southeast of the river outflow to the Ontario Power Generation

Ontario Power Generation

Ontario Power Generation is a public company wholly owned by the Government of Ontario. OPG is responsible for approximately 70% of the electricity generation in the Province of Ontario, Canada. Sources of electricity include nuclear, hydroelectric, solar, wind, and fossil fuel...

 Matabitchuan Generating Station. Highway 567 leads from the community of North Cobalt (in Temiskaming Shores) to the generating station. The lake's waters flow via the Matabitchuan River into Lake Timiskaming

Lake Timiskaming

Lake Timiskaming is a large freshwater lake on the provincial border between Ontario and Quebec, Canada. The lake, which forms part of the Ottawa River, is in length and covers an area of almost . Its water level ranges between and above sea-level, with a mean annual average of . The lake is...

, then via the Ottawa River

Ottawa River

The Ottawa River is a river in the Canadian provinces of Ontario and Quebec. For most of its length, it now defines the border between these two provinces.-Geography:...

 into the St. Lawrence River.