Whenever the Commonwealth shall acquire any toll-bridge across any of the boundary waters of this Commonwealth, and shall thereafter maintain such bridge, it shall be lawful for the Board of Commissioners of Public Grounds and Buildings to enter into a contract, with any borough or township wherein the approach to such bridge is located, leasing to such borough or township any lands acquired in connection with the acquisition of such bridge which are not required for highway purposes. Such lands, when leased to any borough or township, may be used for public park purposes only, under such regulations as may have been imposed by the Board of Commissioners of Public Grounds and Buildings in the lease.
36 P.S. § 3191