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CCP 11-29-1999
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CCP 11-29-1999
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5/8/2007 1:15:46 PM
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11/13/2006 11:28:06 AM
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<br />I <br />I. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br />I <br />I <br />I <br />I <br />I. <br />I <br />I <br /> <br />PROPOSED IMPROVEMENTS <br /> <br />Proposed Roadwav Improvements <br />The streets identified in the Ingerson Road neighborhood for this project are all proposed to be <br />fully reconstructed with bituminous surfacing, concrete curb and gutter, storm sewer and <br />pavement subdrainage systems in accordance with current flexible pavement design <br />methodology. Ingerson Road and Hamline A venue (south of Ingerson Road) are MnDOT State <br />Aid designated routes and will be designed to meet or exceed State Aid standards. <br /> <br />The proposed pavement sections will be designed in accordance with MnDOT guidelines for <br />flexible pavement design. The typical pavement cross section will include 4 inches of <br />bituminous surfacing, 8-12 inches of aggregate base and 12 inches of sand subbase. The sand <br />subbase will be drained with 4 inch PVC subdrainage pipes connected to storm sewer catch <br />basins. The sand subbase will provide enhanced pavement support, pavement subdrainage and <br />frost protection. Final pavement sections will be determined upon the completion of soil borings <br />and consequent analysis of in place soils. It is anticipated that most the soils within the project <br />area will be fairly uniform with one exception. <br /> <br />The segment of Hamline A venue between Ingerson Road and Tiller Lane is anticipated to require <br />significantly more soil correction as a result of its proximity to the adjacent wetlands and <br />apparent damage resulting from excessive frost heaving over the years. This segment of street <br />received the lowest PCI rating in the neighborhood. There are no properties directly served by <br />this segment of Hamline A venue and therefor virtually no assessments are available to assist with <br />funding the cost of its reconstruction. For these reasons, this segment of roadway is not included <br />in the recommended project scope however the estimated cost of reconstruction is itemized in the <br />report for consideration as an alternative. <br /> <br />The street reconstruction will include construction of concrete driveway aprons and patching of <br />existing driveways as necessary to meet the new roadway grades. Restoration will include <br />sodding in residential areas and seeding in open space areas or along wetland slope areas. <br /> <br />A number of alternatives to be considered for the project are also evaluated in this report. The <br />alternatives include the following: <br /> <br />A. Hamline Avenue Vacation <br />This alternative would eliminate the current roadway between Ingerson Road and <br />Tiller Lane adjacent to the wetlands, MnDOT ditches and Highway 51. This <br />segment of roadway would be relatively expensive to construct due to poor <br />existing subgrade soils. Traffic that utilizes this roadway today would likely <br />utilize Dunlap Street as an alternate however the neighborhood area served by this <br />street consists of a portion of Tiller Lane, Dunlap Street, Cannon Street and <br />Dellwood Avenue totaling approximately 30 homes. Therefor the resulting traffic <br />volume increase on Dunlap Street is not expected to be significant. <br />Approximately 50 feet of this roadway segment is assessable therefor the City <br />would bear nearly the entire cost of reconstruction. If the roadway is vacated, the <br />resulting open space could be utilized for storm water ponding purposes which are <br />addressed later in the report. <br /> <br />2 <br />
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