An aerial view of Nevada Solar One. The site takes up about 300 acres and contains 760 mirror arrays measuring about 100 meters each. Roughly 184,000 mirrors are installed at Solar One, a [64-megawatt] solar thermal plant that will go live next month in Boulder City, Nev. The mirrors direct sunlight on an oil-filled tube. The oil is then used to create steam, which turns a turbine.
Added 1:39 am, see previous post for details about the project.