Oldereid Hydroelectric Power Station
The Oldereid Hydroelectric Power Station is a hydroelectric power station in Misvær in Nordland county, Norway.
The plant utilizes a drop of, drawing water from the watercourses of the Oldereid and Skred rivers. The plant uses Lake Børnup as a reservoir, regulated between an elevation of and. Water is also supplied from two other lakes: Gjømmervatnet, regulated between and, and Mangevatnet, regulated between and.
The plant has a single turbine with an installed capacity of and an average annual production of about. Its catchment area is. The plant is owned by Salten Kraftsamband and became operational in 1953. The owner has obtained a license for further development, and water from two more lakes, Tindvatn and Lurfjellvatnet, will be transferred to the power plant. The Oldereid plant replaced what were originally six smaller river plants in the area.
Original installation
In 1945, the municipalities of Bodø, Skjerstad, Fauske, Saltdal, and Sørfold started negotiations on building a conventional hydroelectric power station. The options were Daja in the Sulitjelma drainage system or the Oldereid drainage system, but the authorities were unable to reach an agreement, and so the Norwegian Water Resources and Energy Directorate had to make the choice. The decision was made in 1948 and the size of the facility was determined by the guidelines set up for electricity supply. Only Bodø and Skjerstad approved the decision, and Salten Kraftlag was founded in April 1949. Bodø became a shareholder with 90% ownership and Skjerstad with 10%.From the intake at Lake Børnup, a drift tunnel was blasted out with a cross-section of. Storage basins were created on the hill above the plant, Enghammeren, with the transition to turbine pipes located along the mountainside. The pipeline was long with a diameter of. The total catchment area was calculated at. A Pelton wheel supplied by Voith was installed in the plant powered by a net drop of. The plant had a 14.0 MVA generator supplied by British Thomson-Houston. There were originally three outgoing power lines: two 20 kV lines to Skjerstad and one 60 kV line to Bodø.