One of the huge prohibitive costs of large scale solar arrays is running power lines out to them. The backscatter radar site had high quality lines run to it that could handle its power demands. Off and on for years there has been talk about one energy company or another re-purposing the site since the power lines are (were?) already in place.
Been wanting to check the site out for years. There is a related site just into California near Clear Lake, east of the Lava Beds. Both look interesting on google maps.