A U.S. wilderness area prohibits road-building and other forms of development. Are bridges on hiking trail permitted, or are all river crossings in wilderness areas necessarily unbridged?
Yes, there are bridges in wilderness areas, this one was in the Wind River Range for example.
On there other hand, there are restrictions on the tools used in a wilderness area such as not allowing power tools such as chainsaws.
2Impressed by trail crews for maintaining bridges and trails without power tools!– gerritFeb 5, 2020 at 21:46