Desert bighorn sheep establish two desert areas in southwestern Arizona to help preserve the desert bighorn sheep: Cabeza Prieta National Wildlife Refuge and the Kofa National Wildlife Refuge. In 1941, the San Andres National Wildlife Refuge in New Mexico was added. Desert bighorn sheep populations have trended upward since the 1960s when their population was estimated at 6,700-8,100. The upward trend was caused by conservation measures, including habitat preservation. In 1980, desert bighorn sheep populations were estimated at 8,415-9,040. A state-by-state survey was conducted a few years later and estimated the overall US desert bighorn sheep population at 15,980. The 1993 estimate of
Painted Desert Community Complex Historic District Painted Desert Community Complex Historic District The Painted Desert Community Complex is the administrative center of Petrified Forest National Park. The community center includes administrative facilities, utility structures and National Park Service employee housing, planned by architects Richard Neutra and Robert Alexander as part of the Mission 66 park facilities improvement program. Work on the community began in 1961 and was completed by 1965. The complex contrasts with earlier Park Service architecture that sought to blend with the environment. The Painted Desert community used straight manufactured materials that deliberately draw a contrast with the natural environment. The most significant building