Pub. L. 83-704, tit. I, sec. 106

Sec. 106. (a) The National Park Service is authorized and directed to remove or transplant to other locations any and all planting materials within the area to be used for the bridge, approaches, and connecting roads or for construction purposes, when requested by the Commissioners of the District of Columbia. The Commissioners of the District of Columbia are authorized and directed to regrade the areas involved in the construction of the bridge, approaches, and connecting roads so as to conform with the plans to be approved by them and the Bureau of Public Roads. (b) Upon completion of said bridge, approaches, and connecting roads and the regrading of the areas, or prior thereto, when authorized by the Commissioners of the District of Columbia and when such operation or operations will not interfere with the construction of said bridge, approaches, and connecting roads, the National Park Service is directed to landscape such areas in accordance with the plans of the National Park Service as may be approved by the Commissioners of the District of Columbia and the Bureau of Public Roads, the cost of said landscaping to be paid out of funds made available for the purposes of this title.