Authorizing the revision of lines and grades on a portion of City Plan No. 258 by striking from the City Plan and vacating Brill street from Torresdale avenue to Harbison avenue, by striking from the City Plan and vacating a certain triangular section of Harbison avenue and by reserving and placing on the City Plan a right-of-way for drainage purposes, water main purposes and gas main purposes, under certain terms and conditions. — Open Common Ground