Region
United States
5
Alaska
3
Arctic National Wildlife Refuge (Alaska)
2
Colorado
2
Appalachian Region
1
Arctic National Wildlife Refuge
1
Arctic Ocean
1
Mexico, Gulf of
1
Mississippi
1
Montana
1
Mosquito Creek Lake
1
National Petroleum Reserve (Alaska)
1
Nevada
1
Nye County
1
Ogallala Aquifer
1
Ohio
1
Oklahoma
1
Pennsylvania
1
Roan Plateau Resource Management Planning Area (Colo.)
1
Texas
1
Umiat
1
Umiat (Alaska)
1
Washington County
1
Yuma County
1