Water and diamonds are Lesotho's significant natural resources. Water is used through the 21-year, multibillion-dollar Lesotho Highlands Water Project (LHWP), under the authority of the Lesotho Highlands Development Authority. The project commenced in 1986. The LHWP is designed to capture, store, and transfer water from the Orange River system to South Africa's Free State and greater Johannesburg area, which features a large concentration of South African industry, population, and agriculture. Completion of the first phase of the project has made Lesotho almost completely self-sufficient in the production of electricity and generated approximately US$70 million in 2010 from the sale of electricity and water to South Africa. The World Bank, African Development Bank, European Investment Bank, and many other bilateral donors financed the project.