36 Pa. Stat. § 3393
The joint commission is hereby authorized and empowered to have prepared the necessary and proper plans and specifications for the construction of any bridge across the Delaware River as shall be decided upon, and to select the location for the same, determine the size, type, and method of construction thereof; to plan and fix its boundaries and the approaches thereto and to make all necessary estimates of the probable cost of its construction and the acquisition of ground for its site and approaches; to proceed to acquire the ground for the sites of the abutments and the approaches to such bridge in the manner hereinafter provided; to enter into necessary contracts to build and equip any such bridge and the approaches thereto; to obtain such consent as may be necessary of the Government of the United States and the approval of the Secretary of War; and to cause a survey and map to be made of all lands, structures, rights of way, franchises, easements, and other interests in land lying within the Commonwealth, including lands under water and riparian land owned by any person, corporation, or municipality, the acquisition of which may be deemed necessary for the construction of such bridge and to cause such maps and surveys to be filed in its office.
36 P.S. § 3393