Authorizing the revision of lines and grades on a portion of City Plan No. 197 by placing on the City Plan an extension of Ontario Street from its existing terminus at the northwesterly side of the right-of-way of the Philadelphia Belt Line Railroad southeastwardly to Delaware Avenue; the dedication of the bed of the extended portion of Ontario Street to the City; and the striking from the City Plan of a certain right-of-way reserved for drainage purposes laying within the lines of the proposed extension of Ontario Street; all under certain terms and conditions. — Open Common Ground