| Bonneville Power Administration |
| Bureau of Indian Affairs |
| Bureau of Land Management |
| Bureau of Reclamation |
| Corps of Engineers |
| State Agency |
|
| Federal Aviation Administration |
|
| General Services Administration |
| Private |
| Local Government |
| National Park Service |
|
| U.S. Coast Guard |
| U.S. Dept. of Agriculture (except Forest Service) |
|
| U.S. Dept. of Defense (except Corps of Engineers) |
|
| U.S. Dept. of Energy |
| U.S. Fish and Wildlife Service |
| U.S. Forest Service |
| Undetermined |