(A) Whenever a proposed subdivision lies adjacent to or between other subdivisions which have been provided with curbs and gutters, the subdivider shall install curbs and gutters on each side of the street or road surface.
(B) Subdivisions having a lot area of less than 10,000 square feet or whose average lot width is less than 100 feet at the building setback line, or when the authority duly designated for the acceptance of the roadway requires for reasons of drainage or public safety, shall have curbs and gutters. Determination of need shall be based on pavement drainage, access control, and highway appurtenances design standards of the Illinois Department of Transportation's Bureau of Design, Design Manual, latest amended edition.
(C) Gutters and combination gutters shall be Portland Cement concrete of not less than 24 inches in overall width and not less than six inches thick, as shown on Plate 1 in Appendix A. The curbs and gutters shall conform to one of the construction types shown in Standard Specifications Number 1790F, as amended, of the Illinois Department of Transportation or as shown on Plate 1, and herein contained in Appendix A, and shall be constructed according to the following specifications:
(1) The base for the curbs and gutters shall be well-compacted on the existing base or grade;
(2) The minimum specifications shall be as shown for the types of cross sections in the standard specifications; and
(3) All concrete used in the curbs and gutters shall meet or exceed the specifications of the Illinois Department of Transportation.
(D) Integral or monolithic curbs of the same dimensions as shown in the standard specifications or on Plate 1 in Appendix A, may be constructed with concrete pavement, provided the curb widths meet the requirements shown on Plate 1 in Appendix A.
(E) The minimum grade of any road or street gutter or drainage swale shall not be less than .3% and where open ditches or swales are permitted shall be designed in conformance with § 157.64 of these regulations.
(Ord. 55-4582, passed 10-18-1988)