Federal Agencies
- Bureau of Indian Affairs
- Bureau of Land Management
- Department of Agriculture
- Department of Defense
- Department of State
- Department of Transportation
- Department of Reclamation
- Federal Energy Regulatory Commission
- Forest Service
- National Park Service
- National Park Service
- Nuclear Regulatory Commission
- Rural Utility Service
- Surface Transportation Board
- U.S. Fish and Wildlife Service
- Dept. of National Resources and Conservation
- U.S. Army Corps of Engineers
- U.S. Sheep Experiment Station
- U.S. Postal Service
State Agencies
- Department of Transportation (MT, ND, WY)
- Department of Environmental Quality (MT)
- Department of Natural Resources and Conservation (MT)
- State Historic Preservation Offices (ID, MT, ND, GA, SD, WI, WY)
- Department of State Lands (MT, ND, WY)
- Fish Wildlife and Parks (MT)
- Idaho National Laboratory (ID)
- Public Service Commission (ND)
- County (Yellowstone, Blaine)
