1994-04-25 Regular Meeting - Laserfiche WebLink

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~ ~ CONCRETE REPAIItPROGRAM Concrete streets, while durable, are not maintenance-free. Continued maintenance to prevent water intrusion through joints is the primary tool to ensure longer pavement life. However, there comes a time when maintenance strategies fail to prevent problems, and more intensive rehabilitation or reconstruction becomes necessary. Frequently, the loss of soil beneath concrete streets creates voids, with resultant settling. This tends to open centerline joints, allowing additional water intrusion, as well as drainage problems caused by differential settling along the curb. Poor construction can also contribute to this problem, as experienced on Coupland Drive. Until recently, total removal and reconstruction was the only repair alternative, which is expensive and disruptive to residents. Several years ago, the City began small-scale testing of a proprietary process to underseal, through pressure injection of polyurethane, raising the settled portions of concrete streets to the original grade, promoting positive curb drainage and closing centerline joints, resulting in additional service life without expensive reconstruction. The process is provided by Uretek USA, and is the process used to correct the problems on Copeland Drive in early 1993. Although some problems were experienced with the Copeland Drive project, difficulties were primarily the result of poor original construction, inadequate materials and lack of positive drainage from initial construction. Despite these problems, the Uretek process was successful on Copeland Drive. These problems should not surface with the proposed project, outlined below. The 1993-94 Budget identified two (2) concrete streets that are repairable using the Uretek process; Old Orchard from Piney Brook to Valleybrook and West D Street from S. 5th to S. 6th. Both streets have experienced settling, and should be repaired or replaced. A total of $61,000 has been budgeted for this project. It is estimated that the Uretek process will take two (2) weeks, with minimal inconvenience to residents. The estimated cost to remove and replace these streets with concrete, with new curbs is $300,000, based on the recent East H Street Replacement Project. It is further estimated that this method of repair would take approximately four (4) months, with severe inconvenience to the residents. It is recommended that the City utilize the Uretek process to effect repairs on Old Orchard and West D Street.