Sandvikselva, formerly known as Løxa, is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Bærum

Bærum

is a municipality in Akershus county, Norway. The administrative centre of the municipality is the town of Sandvika. Bærum was established as a municipality on 1 January 1838. A suburb of Oslo, Bærum is located on the west coast of the city....

, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

, originating at the intersection of the two rivers Lomma

Lomma

Lomma is a locality and the seat of Lomma Municipality, Skåne County, Sweden with 8,820 inhabitants in 2005. Of the Scanian towns that never acquired town privileges before abolished in Sweden in 1971, Staffanstorp is the sixth largest.-History:...

 and Isielva at Wøyen. The river flows into the Oslo Fjord 4.5 km south at Sandvika

Sandvika

is the administrative centre of the municipality of Bærum in Norway. It was declared a city by the municipal council in Bærum on 4 June 2003.Sandvika is situated approximately west of Oslo. It is the main transportation hub for Western Bærum, and has a combined bus and railway station. Sandvika is...

, though the center of the city. At the mouth there are three bridges over the river.

There were formerly water mills for industry along the line, including at Franzefoss for Franzefoss Bruk. The river regularly floods, and landslides have occurred. There is a measuring station for water levels and pollution at Bjøregårdsvingen.

Sandvikselva is the premier trout

Trout

Trout is the name for a number of species of freshwater and saltwater fish belonging to the Salmoninae subfamily of the family Salmonidae. Salmon belong to the same family as trout. Most salmon species spend almost all their lives in salt water...

 river of the Oslo Fjord, and a community of dedicated volunteers invest much time and energy to preserve the conditions for the fish to be able to travel up the river to spawn

Spawn (biology)

Spawn refers to the eggs and sperm released or deposited, usually into water, by aquatic animals. As a verb, spawn refers to the process of releasing the eggs and sperm, also called spawning...

each autumn.