(A) Sanitary sewers.
(1) All residential, commercial, industrial and community facilities, structures or buildings shall be served by a complete system of sanitary sewer facilities, and the system shall be installed in accordance with the “Standard Specifications for Water and Sewer Construction in Illinois” and the rules and regulations of the city.
(2) Sanitary sewer systems shall be designed in accordance with the regulations and specifications of the city. No oxidation ponds, seepage lagoons or holding lagoons will be constructed except upon specific approval of the City Engineer. Sanitary and storm sewers shall not be combined. Sanitary sewers shall have a minimum inside diameter of 8 inches and shall be constructed of vitrified clay pipe or cement asbestos pipe or of any acceptable substitute material which has been approved by the Engineer. Sewer service stubs, having an internal diameter of not less than 4 inches, shall be installed to serve each structure prior to the construction of street pavements.
(3) Subdivider will extend sanitary sewer lines to the nearest city facility.
(4) All sanitary lines with 2 or more services shall be terminated with a manhole.
(5) Sewers may be placed only in public rights-of-way or in easements, including easements in private streets. If the sewers cross beneath existing or proposed pavement, all trenches caused thereby will be filled and properly compacted to 90% maximum density at optimum moisture as indicated by standard Proctor test or modified AASHO requirement 180-57.
(B) Storm water sewerage. There shall be provided a storm water sewerage or surface drainage system to adequately serve the area being platted.
(1) Any subdivision having an average density per acre of more than 3½ dwelling units shall provide an underground storm sewer system installed in accordance with “Standard Specifications for Water and Sewer Main Construction in Illinois,” and consideration should be given to the following:
(a) The recommendations of the Plan Commission and the City Engineer;
(b) The volume and frequency of water to be handled;
(c) Utilization of existing water courses.
(2) Any subdivision having an average density per acre of 3½ dwelling units or less may utilize ditches, swales and culverts in accordance with the following standards:
(a) With grades to 4%, ditches may have sod bottom and banks;
(b) With grades from 4% to 8%, ditches must have ditch checks;
(c) With greater than 8% grades, ditches must have rip-rap or be paved;
(d) Culverts must be provided at all street or driveway intersections sized to eliminate flooding or ponding of water, and with a minimum diameter of 12 inches or as approved by the City Engineer. Curbs and gutters will not be required in subdivision if ditches and swales are used in accordance with this division (B)(2).
(3) In any subdivision where multiple family dwellings and/or business, industrial or commercial establishments are planned, the subdivider or the subdivider’s engineer will provide plans and specifications of the storm drainage plan with both the preliminary plat and final subdivision plat submitted to the city for approval under § 154.03(A).
(C) Water supply.
(1) All residential, commercial, industrial, and community facilities, buildings or structures shall be served by complete water supply and distribution system. The design of the system shall be in accordance with the requirements of the State Department of Public Health and the rules and regulations of the city.
(2) Water distribution facilities shall include pipe, fittings, hydrants, valves, valve vaults, valve boxes, water service and other needful appurtenances. Water mains shall have a minimum internal diameter of 6 inches and shall be arranged so as to avoid dead ends wherever possible. If dead ends cannot be avoided, a flushing assembly shall be installed. Fire hydrants with shut off valves shall be installed on mains of a minimum internal diameter of 6 inches throughout the entire system at intervals that the distance between any structure within the subdivision and a fire hydrant shall not exceed 250 feet. Water service connections shall be provided to serve each structure in the subdivision and shall be constructed on type K copper, cement asbestos, or cast iron pipe, or of plastic pipe approved by the Engineer, having a minimum internal diameter of 3/4 inch. The service shall be equipped with all necessary fittings and shall be installed before roadway pavement is constructed. Gate valves with valve boxes or valve vaults shall be installed on the water distribution system at appropriate intervals.
(3) Water mains shall be constructed of cast iron pipe or cement asbestos pipe or of other materials approved by the Engineer. If cast iron pipe is used, the pipe shall have either mechanical, approved double-sealing single-gasket, or lead- caulked type joints. All fittings shall have corresponding joints of the above type. All materials used for the water distribution system shall conform to the applicable specifications of the American Waterworks Association or the American Standard Association.
(4) Water mains may be placed only in public rights-of-way or in easements, including easements in private streets. If constructed beneath proposed or existing pavement, all trenches caused thereby shall be backfilled and properly compacted to 90% maximum density at optimum moisture as indicated by standard Proctor test or modified AASHO requirement 180-57.
(D) Conditions relating to installation of utilities. In all cases where private central sanitary sewer systems are to be used, the developer shall secure the necessary permits for installation and operation of the system. Subdivider shall submit to the Engineer 2 copies of “as built” plans and profiles showing the locations of utilities, (gas, water, electric, telephone, and the like) within public rights- of-way or easements. In flood prone areas, proposed public utilities shall be shown on a utility plan and shall be located or elevated so as to minimize or eliminate flood damage. All public utility lines for telephone and electric service shall be placed underground entirely throughout a subdivided area. The conduits or cables shall be placed within easements or dedicated public ways, in a manner which will not conflict with other underground services. Further, all transformer boxes shall be located so as not to be unsightly or hazardous to the public.
(1992 Code, § 154.51) (Ord. 061278, passed 6-12-1978; Am. Ord. 012797A, passed 1-27-1997) Penalty, see § 154.99