In order to apply the present headquarters site in Mount Rainier National Park to public use for which it is more suitable and to provide a headquarters for the park, the Secretary of the Interior is authorized to provide a park headquarters in the general vicinity of Ashford, Washington, and for such purpose to acquire in this vicinity, by such means as he may deem to be in the public interest, not more than three hundred acres of land, or interest therein.
16 U.S.C. § 110a