36 C.F.R. § 14.6
No interest granted by the regulations in this part shall give the holder thereof any estate of any kind in fee in the lands. The interest granted shall consist of an easement, license, or permit in accordance with the terms of the applicable statute; no interest shall be greater than a permit revocable at the discretion of the authorized officer unless the applicable statute provides otherwise. Unless a specific statute or regulation provides otherwise, no interest granted shall give the grantee any right whatever to take from the public lands or reservations any material, earth, or stone for construction or other purpose, but stone and earth necessarily removed from the right-of-way in the construction of a project may be used elsewhere along the same right-of-way in the construction of the same project.
36 C.F.R. § 14.6