There are several Solar power plants in the Mojave Desert which supply power to the electricity grid. Solar Energy Generating Systems (SEGS) is the name given to nine solar power plants in the Mojave Desert which were built in the 1980s. These plants have a combined capacity of 354 megawatts (MW) making them the largest solar power installation in the world. Nevada Solar One is a new solar thermal plant with a 64 MW generating capacity, near Boulder City, Nevada. There are also plans to build other large solar plants in the Mojave Desert. The Mojave Solar Park will deliver 553 MW of solar thermal power when fully operational in 2011.