Region
Utah
4
Nevada
3
Utah County
2
Yucca Mountain
2
Arches National Park (Utah)
1
Clark County
1
Colorado River Watershed (Colo.-Mexico)
1
Death Valley Region (Calif. and Nev.)
1
Grand County
1
Nye County
1
Pahute Mesa
1
Powder River Basin (Wyo. and Mont.)
1
Sand Wash Basin (Colo. and Wyo.)
1
Tooele County
1
Yucca Mountain Region
1