From Los Alamos Mini Review, January 01, 1982
Fenton Hill during drilling of well EE-3. This 20-acre site in the Jemez Mountains of northern New Mexico contains both the pioneering Hot Dry Rock Research (Phase I) System and the follow on Engineering (Phase II) System. The Research System, behind the red drilling rig, has operated successfully for more than a year at heat- extraction rates up to 5 million watts with no detectable environmental effect. The Engineering System, under construction, will investigate the economic feasibility of generating electricity for commercial use.