04-13-1998 Council Packet - Laserfiche WebLink

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f r i > HM I t I r %u- • . • ' t «« U The Cities of Plymouth and Orono will need to review the three street width options. Both cities should then come to an agreement on street width prior to ordering plans and specillcations. It should be noted that the three proposed street widths do not vary significantly in terms of their impacts to adjacent properties. Street Design The criteria for the roadway designs are ba.sed on Mn/DOT State Aid standards. The propo.sed design .speed for Femdale Road is 30 miles per hour (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 (2”) Type 41 bituminous wearing course 75mm (3") Type 31 bituminous base course 400mm (16 ”) Aggregate base. Class 5,100% crushed 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 near 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 to 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 Plymouth development. Storm Drainage As part of the street reconstruction on Femdale Road, stomi sewer is proposed to be constructed to improve the drainage along the street. Storm sewer would be in.stalled at the five low points on the roadway. Storm drainage would be directed southerly and easterly to existing ponding areas and wetlands. The cities of Medina. Plymouth iuid Orono with the Minnehaha Creek Watershed Distriet (MCWD) are currently working towards solving a high water level problem in Mooney Lake located just north of County Road 6 at Femdale Road. A possible solution to reduce the water level in Mooney Lake is to provide off-peak pumping from the lake to the Femdale system. The stomi sewer on the north end of the project has been sized to accommodate 1 cubic fool per second (cfs) of .stormwater should Plymouth Feasibility Report - Femdale Road Reconstruction