No subdivision of land shall be approved without receiving a statement signed by the City Engineer certifying that the improvements described in the subdivider's plans and specifications, as prepared by a registered professional engineer, together with agreements, meet the minimum requirements of all ordinances of the city and that they comply with the following.
(A) Public water.
(1) Per specifications obtained from the City Engineer, water distribution systems will be provided by the subdivider in all new subdivisions.
(2) All water distribution systems will be connected to the water distribution system of the city.
(B) Sanitary sewers. Sanitary sewers shall be installed to comply with specifications established by the City Engineer and shall be connected to the sanitary disposal system of the city, if reasonably accessible, otherwise to a specially constructed sanitary sewage disposal plant in accordance with plans acceptable to the city.
(C) Drainage systems.
(1) Storm sewers shall be constructed throughout the entire subdivision which shall be separate and independent of the sanitary sewer system and which shall provide an adequate outlet. Adequate facilities for the removal of surface water shall be provided throughout the entire subdivision.
(2) The storm sewer system and its outlet shall be so designed that when the outlet stream or channel is in full flood, the sewer will not fail to function.
(3) Minimum size of openings for bridges and culverts which are built or rebuilt must be approved by the City Engineer.
(4) Side slopes along a drainage course shall have a minimum slope of 4:1 to facilitate maintenance.
(D) Street improvements.
(1) Pavements for major streets and alleys and streets or alleys in areas intended for business, commercial or industrial uses shall be constructed with either Portland cement concrete with integral curbs or bituminous concrete with combination concrete curbs and gutters, in accordance with the existing design criteria and specifications as published by the Department of Transportation of the State of Illinois. Portland cement pavements shall be not less than eight inches in thickness. Bituminous concrete pavements shall be three inches of bituminous concrete laid in two courses over a ten inch minimum compacted crushed stone (CA-6 or CA-10) base. In the absence of adequate soil analysis, a soil support (IBR) value of 2.0 shall be used.
(2) All other streets and alleys shall be Portland cement pavement, with integral curbs, not less than six inches in thickness or bituminous concrete pavement with combination concrete curb and gutters, in accordance with the existing design criteria and specifications as published by the Department of Transportation of the State of Illinois, not less than two and one-half inches in thickness laid in two courses over a seven inch minimum compacted crushed stone (CA-6 or CA-10) base. In the absence of adequate soil analysis, a soil support (IBR) value of 2.0 shall be used.
(3) The above referenced Design Manual and Highway Design Standards and any revisions or amendments which may from time to time be made to same, are hereby adopted and made a part of this chapter, to the same extent and with the same legal effects as if fully set forth therein.
(4) All streets within the corporate limits of the city shall be improved with pavements bounded by integral concrete curbs and gutters.
(5) Curbs and gutters on minor residential streets shall be the integral rolled-type unit of standard design approved by the City Engineer, not less than 18 inches in overall width and not less than six inches thick where curb abuts the street pavement.
(6) Storm water inlets shall be provided within the roadway improvement at points specified by the City Engineer.
(7) Alleys, where permitted herein, shall be paved full width per city specifications.
(8) All curb corners shall have a radius of not less than 20 feet and at important intersections not less than 35 feet.
(E) Public utilities.
(1) All utility lines for telephone and electric services shall be placed in rear or side line easements when carried on overhead poles.
(2) Where telephone and electric service lines are placed underground entirely throughout a subdivided area, said 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.
(F) Sidewalks. In the city, concrete sidewalks, having a width of four feet and a thickness of at least four inches shall be installed along both sides of all public streets, except cul-de-sacs, as part of street improvements required by the Plan Commission and/or the City Council.
(G) Landscaping.
(1) All unpaved areas within the street rights-of-way shall be seeded or sodded. Before the release of the 15 month maintenance bond can be recommended by the City Engineer, all unpaved areas between the edge of the road pavement and the right-of-way line must support an adequate mat of grass. Provisions shall be made to assure the growth of all landscaping.
(2) (a) Street trees shall be planted on both sides of each proposed street except where there are existing trees present and preserved as determined by the City Engineer. Street trees newly planted shall be no further apart than 50 feet and the type of tree shall be limited to those varieties as approved by the city.
(b) Newly planted street trees shall be at least two and one-half inches in caliper, measured one foot from the ground.
(3) Protective screen planting may be required to secure a reasonably effective physical barrier between residential properties and adjoining uses to minimize adverse conditions of sight and sound.
(H) Street signs. Street signs of the type approved by the City Council shall be installed at each intersection and shall indicate the street names as shown on the final plat. Street signs shall be set in the ground according to standard details obtainable from the City Engineer.
(I) Street lighting. Provisions shall be made for the adequate lighting of public streets within the proposed subdivision in accordance with the standards and requirements established by the City Council.
(Ord. 88-30, passed 8-8-88) Penalty, see § 151.999