All street pavements shall be constructed in accordance with the design criteria for the various classes as established in the "Bureau of Design and Environment Manual" and "Highway Standards" of the State of Illinois Department of Transportation, latest edition. Construction materials and methods shall meet the requirements of the "Standard Specifications for Road and Bridge Construction", latest edition. The thickness of the pavements for major collectors and arterials shall be determined in accordance with the current Illinois Department of Transportation "Manual for Structural Design of Portland Cement Concrete Pavement" and the "Manual of Instructions for the Structural Design of Bituminous Concrete Pavements", or as required by the jurisdictional authority.
Streets shall not be constructed on a subgrade having an Illinois bearing ratio (IBR) of less than 3.0. In no case shall the subbase material be placed on a wet subgrade. All removal of unsuitable material in the subgrade must be replaced with compacted clay of proper moisture content to a minimum ninety five percent (95%) modified laboratory density in accordance with AASHTO T99 (method A or C). The soil support IBR value selected for use by the designer shall represent a minimum value for the soil to be used. An adequate number of soil borings shall be obtained to determine the subdivision's soil characteristics for street and utility construction purposes. A copy of the Soil Borings Report shall be provided to the Village Engineer as part of the final engineering plan submittal.
The Village Engineer may approve lime stabilization, when soils are compatible as determined by a geotechnical engineer. The lime shall meet the Illinois Department of Transportation's guidelines for Lime Stabilized Soil Mixture as outlined in the "Standard Specifications for Road and Bridge Construction", latest edition.
When the soils report indicates a subbase area below the water table or having poor drainage characteristics, the pavement design must provide additional subbase drainage which will allow the new subgrade to be drained into the storm sewer or roadside ditch system.
On all streets where new pavements meet existing pavements, transitional pavement shall be provided in accordance with Illinois Department of Transportation District 1 Detail BD-32, Butt Joint and HMA Taper Details, most current version.
The sub-grade shall drain to the curb line and to the inlets and catch basins. Water will not be allowed to pocket if applied on the sub-grade. Positive drainage must be accomplished on the compacted subgrade or the placement of base material will not be allowed. Verification by the Village Engineer of the proper sub- grade drainage will be required prior to any additional roadwork.
The base material shall not be placed prior to approval of the subgrade by the Village Engineer. The subgrade, base course and binder course shall be proof rolled by the contractor as described below. The contractor shall contact the Village Engineer a minimum of forty eight (48) hours minimum prior to the "proof roll".
Proof rolls by the contractor and witnessed by the Village Engineer will be conducted as follows:
A. A loaded truck shall be driven over the area to be tested at a speed, pattern, and number of cycles to be determined by the Village Engineer. The test truck shall be the common tractor- trailer type with no more than five (5) axles with a total of eighteen (18) wheels loaded to a net weight of no less than twenty two (22) tons. The load ticket shall be provided to the Village Engineer for record.
B. Areas of unstable or damaged subbase, base course, or binder course shall be determined by the Village Engineer and removed and replaced to the satisfaction of the Village Engineer at no cost to the Village.
C. The Village Engineer is responsible for indicating whether the proof roll passes or fails. The contractor is responsible for determining how to fix any unsatisfactory areas.
Final placement of asphalt surface course shall be delayed for a minimum of one full winter unless otherwise approved by the Village Engineer. Before the placement of the surface course, all underground utility punch list items for final inspection shall be completed and approved. Also, the binder course patches must be completed and the curb and gutter repaired as required by the Village Engineer.
After any binder course deficiencies have been corrected to the satisfaction of the Village Engineer and immediately prior to placing the asphalt surface course, the pavement shall be thoroughly cleaned and primed with bituminous materials at a residual asphalt rate of 0.05 pounds per square foot. When bituminous materials are applied under traffic conditions, sanding at the approximate rate of two (2) pounds to four (4) pounds per square yard will be required. All affected residents and businesses shall be notified a minimum of twenty four (24) hours prior to placement of bituminous materials.
The bituminous base course, leveling binder, binder course, and surface course mixtures shall be laid on a surface, which is dry and only when weather conditions meet all standards stated in the IDOT Standard Specifications for Road and Bridge Construction.
All paving shall be done with an IDOT approved paving machine utilizing electronic grade control of a minimum length of fifteen feet (15'), but the length of the machine shall be suitable for the width of the road and be verified as acceptable by the Village Engineer.
All asphalt mixtures shall be delivered and handled so that the asphalt mixture immediately behind the paver screed is at or above two hundred seventy degrees Fahrenheit (270°F). All asphalt delivered to the project shall be covered.
Paving timeframe and condition requirements shall be consistent with IDOT Standard Specifications. However, the Village Engineer may approve a written request to allow the installation of binder course after this date provided the above requirements are met. The request must be made in writing to the Village Engineer forty eight (48) hours prior to the requested paving dates, along with a weather forecast for the next ninety six (96) hours. Surface course must be placed the paving season following binder course installation, after a winter has passed. The asphalt laying pattern must be approved by the Village Engineer or his/her representative in order to minimize longitudinal joints. A certified nuclear density technician must be on site to set the asphalt pavement rolling pattern and confirm compaction densities. The technician shall revise the rolling pattern as deemed necessary. The technician shall stop the paving operation if the required densities are not being met. Density test results shall be submitted to the Village Engineer within one week of completion of the paving operation.
The binder course and surface course may be tested for smoothness with a sixteen foot (16') straightedge after it has been thoroughly compacted. Any surface variations which warrant penalties per section 406.11 of the Illinois Department of Transportation Standard Specifications will be paid to the Village of Sugar Grove per the rates per each surface variation and/or repairs identified in the Illinois Department of Transportation Standard Specifications. This will be done at the sole expense of the contractor. For any surface variations 0.75 inch or greater, the contractor shall remove and replace a large number of bumps; however, complete removal and replacement of the surface course at the contractor's expense will be required.
All streets and roadways shall conform to the minimum design standards shown in section 12-11-3-2, table 12-11-3-2, "Minimum Standards For Street Design", of this section 12-11-3. Existing roadways running through or adjacent to a development shall be reconstructed by the developer to comply with these Standard Specifications for Improvements unless the Village Engineer recommends and the Village Board concurs that "substantial improvement", in lieu of reconstruction, will meet the intent of these specifications. If these roadways to be improved exist within prescriptive right-of-way, off center improvements may be required with greater width dedications on the side of the proposed development. Recapture agreements will most likely be appropriate as determined by the Board of Trustees. (Ord. 2018-02-20, 2-20-2018)