CCP 01-31-1994 - Laserfiche WebLink

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I ~ Complete reconstruction Cut and patch distressed areas of the existing pavement, followed by a bituminous overlay of the entire surface. I Cold in-place recycling of the existing pavement, followed by a bituminous overlay of the entire surface. I Brief synopses of the various methods of street rehabilitation follow. The summaries address the advantages and disadvantages of each method relative to the apparent subgrade conditions encountered during the soil boring program in Arden Hills, Minnesota. I Roadway reconstruction allows for the sub grade improvements necessary to reduce the impact I of frost and poor drainage. This sub grade preparation should include the placement of a sand drainage layer and edge drains to route subgrade moisture through the storm sewer system. The subgrade performance should be significantly improved with the installation of a I minimum of one foot of subgrade sand. In areas of poorer subgrade strength, a two foot sand drainage layer may be required. Although this is the most costly method of street rehabilitation, it will provide a superior and longer lasting street surface. I Bituminous patching followed by a bituminous overlay may present a lower initial cost, but the repair is a short term fix at best. The frost damage, drainage problems and reflective .. cracking would continue to appear within the new pavement within two to five years, resulting in higher maintenance costs and a shorter street life. I Cold in-place recycling will provide an acceptable street surface for the volume of traffic expected on a residential street and will also allow for the grading and compaction of the base to provide a smooth, crack free surface prior to placing bituminous material. Placement of I subgrade granular material is limited with this method of street rehabilitation; however, if subgrade preparation is not required, this method provides a good, long lasting surface (10-12 years) for a relatively inexpensive cost. I Amble Drive. Bussard Court and Dunlao Street I Complete reconstruction is the method of street rehabilitation recommended for Amble Drive, Bussard Court and Dunlap Street. These streets all show signs of frost damage and poor I subgrade drainage conditions which could be improved through the placement of a sand drainage layer and edge drains as outlined above. The soils within the subgrade along these streets should be subcut to a depth of one foot and tested for stability through a test rolling I program as outlined in the AET report. If the test rolling determines that the desired soil stability is not reached, the section should be subcut to a depth of approximately IS-inches. Based upon the soil boring program, up to two-foot subcuts may be necessary at the northern I half of Amble Drive and the within the cuI de sac on Bussard Court. This will require field {' 12 I