36 Pa. Stat. § 670-713
The cost and expense of construction, replacement or repair of such bridges shall be paid in whole or in part from Federal emergency funds made available for such purpose, and, where sufficient Federal emergency funds are not available to pay the entire cost of such construction, replacement or repair, the city in which such bridge is located or the county in case the bridge is owned and maintained by it shall provide and pay the balance thereof. Except as hereinafter specifically provided in this act, no construction, replacement or repair costs or property damages shall be paid out of the Motor License Fund or out of any Federal aid appropriations made to the Commonwealth by the Federal government for the construction of State highways and bridges.
36 P.S. § 670-713