The Larona River Basin which covers an area of 2,477 km2, including the three cascading lakes: Matano, Mahalona and Towuti, is a strategic watershed acts as water resource for hydropower plants that supply 420 Megawatt electricity to power nickel processing plant its supporting facilities need surrounding communities. maximum minimum operating levels Lake Towuti are 319.6 meters (asl) 317.45 re...