01-06-1998 Council Packet Special Meeting

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Preliminary Report City of Plymouth wallcway is proposed along the east side of the street from the Luce Line trail to County Road 6. The walkway would be located 1.5 meteis behind the curb where topography and right-of-way permits. In areas where trees are to be preserved or embankments are steep the walkway will abut the back of curb. Pedestrian curb ramps will be required at all locations where the walkway meets the street. As part of the street improvements, all existing drivev ays are proposed to be paved to ten feet from the curb line. Retaining walls, berms or hedges are proposed in some areas to preserve specimen trees and provide privacy for yards and houses close to the right of way. Trees will be planted from nursery stock to replace those trees removed during construction. Traffic Analysis Based on traffic counts concucted by City's Public Works Department, the average daily traffic volumes (ADT) on the north ana jnuth ends of Femdale Road from Trunk Highway 12 to County Road 6 are 3200 and 3500 vehicles per day (VPD) respectively. Using Hennepin County ’s twenty year projection factor of 1.5, the ADT in the year 2017 will be about 5000 VPD. Street Design The proposed street improvements for Femdale Road are shown on Figures 1,2 and 3. The criteria for the roadway design are based on Mn/DOT State Aid standards. The recommended design speed for Femdale Road is 30 miles per hour (mph), based on a posted speed limit of 30 mph. The proposed pavement section for Femdale Road, which is based on the anticipated traffic volumes over the next 20 years, is presented below: 50mm Type 41 bituminous wearing course 75mm Type 31 bituminous base course 400mm Aggregate base, Class 5,100% crashed rock Soil borings have been taken along the project that show the presence of some organic materials. Organics encountered in the subgrade will be excavated and replaced with a suitable clay or granular material. The street section will be reinforced with a geotextile stabilization fabric that will also provide separation between the subgrade and the aggregate base. Water Main An existing water main stub located n.v Femdale Green on the south end of the project would be extended southerly off of the roadway as part of the street construction. The extension would allow for a future water main connection by the City of Wayzata without disturbing Femdale Road. A 200 mm stub would be provided on the east side of Femdale Road approximately 100 meters north of Twelfth Avenue to serve any future development 70303tpt r.1 ■ MT I1~B I I I ■