Chizavu cha Bureau of Land Management (BLM) chinambe ngwo, mu mwaka wa 2000, chizavu cha Navajo Nation, chize chinatwama ni yifwo mu chihela chacho, chinalumbunuka ngwo, chitamba kuhanjisa yifwo ya kufumba ha 29 km2 ya chihela cha mbunga chize chili kusula ya chihela chacho.