CCP 11-10-2003 - Laserfiche WebLink

Home Browse Search

I .. I I I I I I I - I I I I I I .. I I B. Proposed Roadway Improvements Overview Pavement Section Discussion The following streets are proposed to be fully reconstructed with bituminous surfacing, concrete curb and gutter, aggregate base, sand subbase with draintile. (concrete alleys without curbs are proposed for the narrowest street sections) Proposed street widths are as measured between face of new curbs or edge of concrete for the proposed alley sections. The southern segment of Shoreline Lane (near County Road D) is the only street which falls neatly into the City's standard street widths. The remainder of the streets are special cases and have been designed to fit within the existing physical topography and right of way constraints. Edgewater Avenue (24 foot width) Edgewater Avenue (west end) (20 foot width) Edgewater Avenue (north south segment) (16 foot alley) Lake Lane (north of Edgewater) (16 foot alley) Lake Lane (south of Edgewater) (24 foot width) Shoreline Lane (north of Edgewater) (16 foot alley) Shoreline Lane (south of Edgewater) (24 foot width) Shoreline Lane &County Road D (28 foot width) County Road D (28 foot width) The proposed roadway improvements are illustrated in exhibits 2, 4,6, & 7. The proposed street pavement sections will be designed in accordance with MnDOT guidelines for flexible pavement design utilizing the soil R values measured from the geotechnical analysis accomplished as a part of the final design process. City standards include a 12 inch sand subbase. The sand subbase will provide enhanced pavement support, pavement subdrainage and frost protection necessary for the soils encountered in this area. The typical pavement cross section will include 4 inches of bituminous surfacing, 8-12 inches of Class 5 aggregate base and 12 inches of sand subbase. The sand subbase will be drained with 4 inch diameter PVC perforated pipes connected to storm sewer catch basins. Final pavement sections will be determined as a part of the final design process based upon the soil borings and analysis of in place soils and traffic loads. The sand subbase will add value to the pavement section through increased strength and frost resistance. Pavement consistency within an area is generally a desirable design attribute since different sections will react differently to weather and traffic thus typically creating a "speed bump" or depression at the location of interface. The cost of the sand subbase is approximately $20.00 per linear foot of roadway. 4