Mibau Stema

Mibau Stema (formerly Norsk Stein) is one of the country's leading producers of crushed stone and stone materials, producing at four locations in Norway: Jelsa, Tau and Dirdal in Rogaland, and at Larvik in Vestfold. The facility at Jelsa is the largest quarry in Europe with an annual production of 10 million tonnes. The quarry was established in 1987, and as of 2018 is wholly owned by the German company Mibau-Stema. The production process starts with blasting rock in an open pit, followed by coarse crushing, fine crushing and other processing. Aanestad Service has supplied conveyors and conveyor belts to the facilities for many years and is responsible for much of the maintenance the belts require.