Whenever the department finds that it is in the best interests of the state of Washington to acquire any property or use of a road in private ownership to afford access to state timber and other valuable material for the purpose of developing, caring for, or selling the same, the acquisition of such property, or use thereof, is hereby declared to be necessary for the public use of the state of Washington, and the department is authorized to acquire such property or the use of such roads by gift, purchase, exchange, or condemnation, and subject to all of the terms and conditions of such gift, purchase, exchange, or decree of condemnation to maintain such property or roads as part of the department's land management road system.