Alnsjøen

Alnsjøen
Alunsjøen (2007)
Location	Oslo
Coordinates	59°58′31″N 10°43′39″E / 59.97528°N 10.72750°E / 59.97528; 10.72750Coordinates: 59°58′31″N 10°43′39″E / 59.97528°N 10.72750°E / 59.97528; 10.72750
Basin countries	Norway
Surface area	39 ha (96 acres)
Average depth	32 m (105 ft)
Water volume	7.56 km3 (6,130,000 acre·ft)
Surface elevation	183 m (600 ft)
References	NVE

Alnsjøen (also called Alunsjøen) is a lake in Lillomarka in Oslo, Norway. The lake drains through the Alna River to the Oslofjord. The surrounding area was utilized for copper mining during the 18th century. The lake is used as a water reservoir for the city of Oslo.

Alnsjøen in winter

The dam of Alnsjøen