After and extensive review, US Forest Service and The Bureau of Land Management declined to renew the leases on nine C-130A over concerns about the age of the aircraft, which had been in service since the 1950s, and their ability to handle the forces generated by aerial firefighting.
and various federal agencies, including the National Park Service, US Forest Service, and Indian Health Service.
As of 1993, the US Forest Service managed 289 established RNAs and more than 300 candidate RNAs.
As of 2018, there were 571 US Forest Service RNAs (Note that these are not complete lists): These areas are established under the Organic Act of 1897.
The US Forest Service, along with preservationist Bob Marshall, continued to add acreage to the fledgling wilderness system.
The Wilderness Act gave federal protection to these US Forest Service administrative areas and created the National Wilderness Preservation System.