36 Pa. Stat. § 3524
The said commission is also hereby authorized to purchase such lands, rights or interests in lands, necessary for the building of said bridge or tunnel and the approaches thereto, or to acquire the same by condemnation proceedings, in the manner provided by the general laws of this Commonwealth relating to the condemnation of land for public purposes. The cost of said condemnation proceedings, including the court costs, compensation of viewers, and the required advertising, shall be paid by the Commonwealth of Pennsylvania. But said commission shall have no power to enter into any contracts for the purchase of land, rights or interests in land, or of any other property, unless a previous appropriation shall have been made therefor by the proper officers and officials empowered by law to make such appropriation for a municipal or county government. Said commission is hereby authorized to accept, on behalf of the county or municipality in which said bridge or tunnel is to be located, any gifts of lands, rights or interests in lands, contiguous or adjacent to said bridge or tunnel, for the purpose of building the same, and shall hold the same for this purpose until such time as said commission, in their judgment, may transfer such lands, rights, or interests to the municipality or county in which said bridge or tunnel is to be located. Said commission is likewise authorized to accept gifts of money or other property for this purpose.
36 P.S. § 3524