City of Oak Creek
Common Council Report
Item No.: 9
Recommendation: That the Common Council consider a motion to approve an addition to Chapter 8 (Roadway Standards) of the Engineering Design Manual.
Background: The latest edition of the Oak Creek Engineering Design Manual is dated March, 2004. The majority of the manual outlines design of new facilities (roads, sewers, storm water management systems, etc.). The Engineering Department feels it is necessary to add a subsection to the Roadway Standards chapter addressing rehabilitation of existing street pavements.
The Engineering Department has employed a consistent and successful method for rehabilitating deteriorated and/or extensively damaged pavements for several years. There have been instances where developers or contractors have caused significant damage to City streets in the course of their operations, and many times the responsible party has resisted the City’s preferred method of street repair. The addition of the proposed subsection to Chapter 8 of the Engineering Design Manual would put an end to any debate about how the responsible party would be required to repair the pavements they damaged.
Fiscal Impact: None.
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Prepared by:
Michael C. Simmons, P.E. Construction Engineer
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Respectfully submitted:
Barbara S. Blumenfield, Ph.D. City Administrator
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Approved by:
Wayne St. John, P.E. Director of Public Works |
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Fiscal review by:
Beverly A. Buretta, CMC City Clerk |
T:\Shared\WPFILES\CCREPORT\Design Manual - Roadway Standards Change.doc
Proposed Addition to Chapter 8 (Roadway Standards)
of the Engineering Design Manual
27. Rehabilitation of Existing Asphalt Streets
a. Existing deteriorated asphalt pavements shall be pulverized full-depth in conformance with Section 325 of the State Specifications. Pulverizing operations shall extend to such depth to achieve a uniform mixture of pulverized asphalt with at least the top three inches of the existing underlying aggregate subbase. This work shall include any required hauling and proper off-site disposal of surplus pulverized material.
b. The resulting aggregate roadbed shall then be graded and compacted to provide a stable subbase for new hot mix asphalt overlay. Grading of the material shall result in a cross slope which shall not exceed 4.0% and a minimal raising of the pavement along its edges. Prior to paving, subbase shall pass a proof-roll under City inspection with a quad-axle truck carrying a ticketed 20-ton load.
c. Asphalt overlay thickness shall be a minimum of 3” thickness, unless the City Engineer determines that traffic warrants a thickness of 5”. Three inch asphalt pavement shall consist of one binder course and one surface course, and 5” pavement shall consist of two lifts of binder course and one surface course.
d. Pavement edges shall be blended to existing stone shoulder with new crushed limestone shoulder material placed, shaped and compacted.
e. Pavement markings shall be epoxy paint in accordance with the State Specifications and the MUTCD.