Authorizing and directing the revision of lines and grades on a portion of City Plan No. 253 of the area lying generally northwardly from the intersection of Unruh avenue and Oakley street by striking from the City Plan a portion of Kerper street and Kerper place; by placing on the City Plan certain portions of rights-of-way for drainage purposes and water main purposes; by striking from the City Plan and abandoning a certain right-of-way for drainage purposes and water main purposes, under certain terms and conditions. — Open Common Ground