Wash. Rev. Code § 79.14.560
Upon the termination of any lease issued under the foregoing provisions, the lessee shall surrender the lands and premises and leave in good order and repair all shafts, slopes, airways, tunnels, and watercourses then in use. Unless the coal therein is exhausted, the lessee shall also, as far as it is reasonably practicable so to do, leave open to the face all main entries then in use so that the work of further development and operation may not be unnecessarily hampered. The lessee shall also leave on the premises all buildings and other structures, but shall have the right to, without damage to such buildings and structures, remove all tracks, machinery, and other personal property.
RCW 79.14.560
Intent-2003 c 334: See note following RCW 79.02.010.