(A) Street improvements shall be in accordance with the Table of Minimum Standards, as set forth in § 154.31(Q).
(B) Wherever ground is encountered which, in the opinion of the City Engineer, is unstable either before preparation of detailed plans or during the construction phase of the proposed improvements, no paving for public or private streets shall be placed thereon until the unstable materials shall be removed in their entirety and shall be replaced with satisfactory material which shall be adequately compacted or made useable all in accordance with recommendations by the Engineer.
(1) Streets shall be constructed in accordance with provisions of this Code, the Comprehensive Plan and the “Standard Specifications for Road and Bridge Construction.”
(2) Portland or equal quality cement concrete pavement shall conform to the “Standard Specifications for Road and Bridge Construction,” with the following exceptions:
(a) The maximum slump of portland cement concrete shall be 4 inches.
(b) Portland cement concrete shall contain a minimum of 6 sacks of cement per cubic yard.
(c) Alternate mix designs for portland cement concrete may be approved by the City Engineer, if requested in writing prior to construction.
(d) Beams shall be taken at a minimum rate of 2 per day. A modulus of rupture of not less than 650 psi shall be required on the fourteenth day following the pour in accordance with the “Standard Specifications for Road and Bridge Construction.”
(e) The subdivider shall protect the pavement against all traffic, including that of his or her own employees or other workers on the site, until test specimens have attained a flexural strength of 650 psi when tested in accordance with the “Standard Specifications for Road and Bridge Construction.”
(f) Portland cement concrete shall be constructed to a strength and thickness greater than or equal to 6 inches (unreinforced) for minor streets and 7 inches (unreinforced) for collector, business, commercial, marginal access, and industrial streets. If pavement strength or thickness is deficient, the subdivider or his or her agents shall take remedial action, the action to be selected from the following options:
1. Removal and replacement of the deficient pavement sections to the planned thickness and/or strength.
2. Bituminous concrete overlay of the pavement in lengths not less than 1 block or 500 feet, whichever is less. Overlay thickness shall be specified by the City Engineer. Pavement deficiencies in thickness and/or strength in excess of 10% shall be removed and replaced to planned thickness and/or strength.
(g) Pavement cores shall be taken at the rate of 1 per 250 feet per lane at locations designated by the City Engineer. If modulus of rupture tests do not meet the minimum requirements set forth in this section, the subdivider shall furnish the results of compressive strength tests of pavement cores.
(h) Joints in all local residential streets shall be constructed in accordance with Standard No. BLR-10, Bureau of Local Road, State Department of Transportation, with the following exceptions:
1. Sawed longitudinal joints shall be constructed with No. 4 deformed bars 2-feet, 6-inches long at 2-feet, 6-inch centers.
2. Integral curb details at sidewalks and crosswalks shall conform to the sidewalk requirements set forth in this section.
3. Expansion joints shall be constructed in accordance with the “Standard Specifications for Road and Bridge Construction” using ¾-inch dowel bars, 18-inches long at 12-inch centers, coated with heavy grease, pinch stop with 1-inch minimum taper.
(i) Joints in residential streets, business, commercial, and industrial streets shall conform to “Highway Standards,” State Department of Transportation.
(3) All joints in portland cement concrete pavements shall be filled in accordance with the “Standard Specifications for Road and Bridge Construction.”
(4) Uncontrolled cracking which appears in portland cement concrete pavement prior to approval by the City Engineer shall be cleaned and filled in accordance with the “Standard Specifications for Road and Bridge Construction.”
(5) Bituminous pavement shall be constructed in accordance with the “Standard Specifications for Road and Bridge Construction.”
(a) Minimum bituminous pavement thickness for all minor streets shall be as follows:
Bituminous Surface Course
3-inch bituminous concrete surface course
Base Course
5-inch bituminous aggregate mixture or
8-inch aggregate base course type B
Materials which according to the “Pavement Design Manual,” State of Illinois, Bureau of Local Roads, are of equal strength to those above, may be used, if approved by the City Engineer.
(b) Minimum bituminous pavement thickness for collector streets, and business, commercial and industrial streets, shall be as follows:
Bituminous Surface Course
1½-inch bituminous concrete surface course and 1½-inch bituminous concrete binder course - total 3 inches
Base Course
8-inch bituminous aggregate mixture or
10-inch aggregate base course, type B
Materials which according to the “Pavement Design Manual,” State of Illinois, Bureau of Local Roads, are of equal strength to those above, may be used, if approved by the City Engineer.
(c) Tests of the surface and base courses shall meet the requirements set forth in the “Standard Specifications for Road and Bridge Construction,” except that:
1. Tests shall be taken at a rate of 1 per 250 feet per lane at locations designated by the City Engineer.
2. Field cement content tests and sieve analysis tests shall be taken at a rate of 1 per 500 feet per lane when cement aggregate mixture is used.
(d) Cores shall be taken at locations specified by the City Engineer at a rate of 1 per 250 feet per lane. At the request of the Engineer, the subdivider shall cause Marshall Stability Density tests to be performed on the cores and shall furnish the results of the tests to the Engineer.
(e) 1. Bituminous pavement shall be constructed to a strength and thickness greater than or equal to that required by this section and approved in the engineering plans and specifications. If pavement strength or thickness is deficient, the subdivider or his or her agents shall have the following options:
a. Removal and replacement of the deficient pavement sections to the planned thickness and/or strength.
b. Class I overlay of the pavement to a thickness to be approved by the City Engineer.
2. Pavement deficiencies in thickness and/or strength in excess of 10% shall be removed and replaced to planned thickness and/or strength.
(f) Cracks shall be cleaned and sealed in accordance with the “Standard Specifications for Road and Bridge Construction.”
(6) Oil and chip pavement shall be constructed in accordance with the “Standard Specifications for Road and Bridge Construction.”
(a) Oil and chip surfaced streets shall be constructed over a type B aggregate base course no less than 8 inches thick.
(b) Oil and chip surface shall be type A-3 in accordance with the “Standard Specifications for Road and Bridge Construction.”
(C) Combination curbs and gutters shall be constructed of portland cement concrete of the roll, vertical face or battered type, having an overall width of not less than 18 inches. Concrete used for curb and gutter construction shall have a minimum 28 day compressive strength of 3500 psi and shall contain not less than 4% nor more than 7% entrained air. Slump shall be not less than 2 inches nor more than 4 inches. Curb and gutter of the roll type shall have a curb exposure of not less than 3 inches. Curb and gutter of the vertical face or battered type shall have a curb exposure of not less than 6 inches nor more than 8 inches. Elevations for curbs and gutters shall be approved by the City Engineer. Combination curbs and gutters shall be provided on all streets in the subdivision where storm sewers are used.
(D) All curb returns at street intersections shall have a radius of not less than 20 feet except not less than 25 feet at major street intersections. In industrial and commercial areas the radius of curb returns shall be not less than 25 feet and shall be increased to 30 feet at major intersections.
(E) Street signs as per city specifications shall be installed at each intersection and shall indicate the street names as shown on the final plat. Street signs shall be set as directed by the City Engineer.
(F) The Plan Commission may make recommendations as to variations and modifications of the foregoing provisions in this section to the City Council which may in turn approve the recommendations. However, a two-third vote of the City Council shall be required for approval.
(1992 Code, § 154.32) (Ord. 061278, passed 6-12-1978) Penalty, see § 154.99