53 Pa. Stat. § 16399
An act, entitled "An act in relation to the plans of surveys of certain streets in the Twenty-fourth ward of the city of Philadelphia," approved the eighteenth day of July, Anno Domini one thousand eight hundred and sixty-three, which suspends the plan of surveys within the limits of a certain tract of land, then in the twenty-fourth ward of the city of Philadelphia, known as the Mayland dam property, and forbids the opening of streets through the same, be and the same is hereby repealed; and so much of the established plan of survey of the city of Philadelphia as is embraced within the limits of the property dedicated under the provisions of the act hereby repealed, may be revised by the board of surveys of said city, both as to streets and grades; and any alterations of the same shall be filed, returned to court, and confirmed in the manner now prescribed by law.
53 P.S. § 16399