53 Pa. Stat. § 16424
The select and common councils of the said city shall be authorized to make all ordinances which they shall judge useful or necessary for the forming, laying with broken stone or gravelling any of the streets, alleys, courts or lanes within the said city, which shall at any time by them be judged improper to order to be paved, and whenever the cart way of any such street, court or other passage shall be regulated, shaped and formed or when so formed and laid with gravel or other hard substances, in either of those cases the owners of the several lots which are bounded upon or adjoining any such street, court or other passage shall be obliged to form or shape, or lay with hard substances or gravel, the respective footways opposite to their several lots, in such manner, at such time and under such penalties as shall be directed by the said ordinances.
53 P.S. § 16424