(A) The full width of the right-of-way shall be graded to the required section.
(B) All unsuitable sub-base material shall be removed and replaced with stable, compacted material in conformance with generally accepted engineering practices.
(1) Soil test reports are to be submitted to the Village Engineer at the time of plan submittal.
(2) Subgrade stability improvements will be required for soils with an IBR less than 6.
(C) Vertical curves.
(1) Vertical curves shall be used whenever a change in centerline gradient occurs, except where the algebraic difference in gradients is one percent or less.
(2) The length of vertical curves shall be established on the basis of design, speed and stopping distance, in accordance with standards obtainable from the Village Engineer.
(D) All pavement thicknesses, including sur- face, base courses and sub-base courses, shall be designed in accordance with the Illinois Department of Transportation standards.
(1) The minimum thicknesses for Class IV streets shall be as specified in Appendix C.
(2) Proof roll of the sub-base and base course shall be conducted; and densities of the sub-base, base course, binder course and surface course of all streets shall be field-verified during construction with nuclear methods by a village-employed testing service, in accordance with the provisions set forth in § 154.76 of this chapter.
(E) (1) Class III streets require design data to be submitted to the Village Engineer at the time of plan submittal, and shall always meet or exceed the minimum requirements in Appendix C.
(2) However, alternate materials may be considered by the Planning and Zoning Commission, if recommended by the Village Engineer, if structurally equal:
(a) Standard reinforced, portland cement concrete pavement, having a uniform thickness of eight inches. Concrete for such pavement shall conform to the Illinois Department of Transportation Standard Specifications for Road and Bridge Construction; and
(b) Five-inches-thick, bituminous- aggregate-mixture base course, a wearing surface of bituminous concrete binder, and a surface course having a minimum compacted thickness of three inches. Bituminous pavement shall conform to the Illinois Department of Transportation Standard Specifications for Road and Bridge Construction.
(F) Curbs and gutters shall be constructed on all streets and shall be combination (integral) concrete.
(1) Curbs may be constructed integrally with the portland cement concrete pavement.
(2) All curbs and gutters shall be installed in accordance with the minimum standards and specifications, as contained in Appendix H to this chapter, or as approved by the Village Board after recommendation by the Planning and Zoning Commission.
(Ord. 176, passed 3-6-78; Am. Ord. 864, passed 11-6-95; Am. Ord. 1233, passed 5-20-02)