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
High Desert State Prison (Nevada) High Desert State Prison (Nevada) High Desert State Prison is a state prison in unincorporated Clark County, Nevada, near Indian Springs. It is the largest institution of the Nevada Department of Corrections and the newest, having opened on September 1, 2000. It has a capacity of 4,176. The complex lies approximately northwest of Las Vegas along highway 95. It was designed as the most secure prison within the Nevada Department of Corrections system. High Desert State Prison contains 12 housing units designed to house 336 inmates each. Each of units 1-8 are separated into four (4) sections called "pods". Each