53 Pa. Stat. § 16865
The owners of property fronting on Wharf street in the district of Southwark as the said street is laid down in the act, entitled "An act for extending the width of Wharf street and regulating the width of the wharves within the district of Southwark," passed seventh of April, one thousand eight hundred and nine, shall upon being duly notified by the commissioners of the district of Southwark within sixty days from the service of said notice, head their docks in the manner expressed in the act aforesaid, and in case of the refusal or neglect of the said property holders so to head their docks, the same shall be done by the commissioners of the said district, and the costs and expenses thereof, together with the legal interest, accruing thereon, are hereby declared to be a lien on such property, until the same shall be fully paid and satisfied.
53 P.S. § 16865