In furtherance of the purposes of sections 428 to 428d and 428e to 428i of this title and to facilitate an appropriate observance of the one hundredth anniversary of the Battle of Fort Donelson, the Secretary of the Interior is authorized to designate for addition to the present Fort Donelson National Battlefield such lands and interests in lands adjacent to said battlefield as in his discretion are necessary to preserve and interpret this historic battleground, including the nearby historic Surrender House and the land upon which it is situated on Spring Street in the town of Dover, Tennessee.