10 U.S.C. § 2668: Easements for rights-of-way

railroad tracks; gas, water, sewer, and oil pipe lines; substations for electric power transmission lines and pumping stations for gas, water, sewer, and oil pipe lines; canals; ditches; flumes; tunnels; dams and reservoirs in connection with fish and wildlife programs, fish hatcheries, and other improvements relating to fish-culture; roads and streets; poles and lines for the transmission or distribution of electric power; poles and lines for the transmission or distribution of communications signals (including telephone and telegraph signals); structures and facilities for the transmission, reception, and relay of such signals; and any other purpose that the Secretary considers advisable. No easement granted under this section may include more land than is necessary for the easement. failure to comply with the terms of the grant; nonuse for a two-year period; or abandonment. Copies of instruments granting easements over public lands under this section shall be furnished to the Secretary of the Interior. Subsections (c) and (e) of section 2667 of this title shall apply with respect to in-kind consideration and proceeds received by the Secretary of a military department in connection with an easement granted under this section in the same manner as such subsections apply to in-kind consideration and money rentals received pursuant to leases entered into by that Secretary under such section.