Area 51 between Area 51 and Lockheed's Burbank, California offices. To preserve secrecy, personnel flew to Nevada on Monday mornings and returned to California on Friday evenings. Project OXCART established in August 1959 for "antiradar studies, aerodynamic structural tests, and engineering designs [and] all later work on the" Lockheed A-12 included testing at Groom Lake, which before improvements for OXCART had inadequate facilities: buildings for only 150 people, a asphalt runway, and limited fuel, hangar, and shop space. Selected for its seclusion and climate, Groom Lake had received a new official name "Area 51" when A-12 test facility construction began in September
Utah State Route 51 of the oldest grade separated interchanges in Utah still in use. Although portions of Interstate 15 were constructed in 1955, the Beck Street interchange (I-15/US-89) is the only original structure from 1955 still in use. Utah State Route 51 State Route 51 is a short highway completely within Utah County in northern Utah that connects SR-147 to US-89. The highway runs for three miles (5 km) and is an old routing of U.S. Route 91. The route begins at the intersection of 400 North (SR-147) and Childs Road in Spanish Fork, SR-51 heading northeast as a two-lane undivided highway on