06-10-2024 Council Meeting Packet

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Feasibility Report 2024 / 2025 Street Reconstruction and Municipal Sewer and Water Extension Project Colonial Woods City of Lino Lakes, MN WSB Project No. 023620-000 Page 5 4. Proposed Improvements4.1 StreetsThe City will reconstruct the roadway back to the existing width of 28 feet (back of curb to back of curb) and install concrete curb and gutter. Once curb and gutter is installed the roadway will seem narrower, which will provide a level of traffic calming. The road section will consist of 4 ½ inches of bituminous on top of 8 inches of class 5 aggregate base. The subgrade will be evaluated through the design process. The City may incorporate reclamation into the project. Surmountable curb and gutter is proposed for the entire Colonial Woods neighborhood, and will be lowered at the driveways. A proposed typical section can be found in Appendix A. 4.2 Drainage The City has completed a preliminary stormwater management design that will replace and expand the existing drainage systems. The design is in conformance with the City’s Stormwater Management Ordinance and Rice Creek Watershed District (RCWD) Rules. The area planned for a new stormwater management facility is within the 62nd Street right of way as it extends undeveloped to the east. The City will be required to obtain a permit from Rice Creek Watershed District and the Minnesota Pollution Control Agency (MPCA). The preliminary storm sewer design is proposed to consist of typically 12 inch to 18 inch diameter Reinforced Concrete Pipe (RCP). At the time of this report, the storm system is planned to convey water to the pond on the easterly end of 62nd Street and outlet to the easterly wetland. The preliminary storm pipe locations and pond outline can be seen in Appendix A . 4.3 Utilities 4.3.1 Sanitary Sewer An 8-inch diameter PVC sanitary sewer will be extended east along 62nd Street to Red Maple Lane. The sanitary sewer along 62nd Street is trunk sanitary sewer and will serve additional properties in the future. An 8-inch diameter PVC sanitary sewer will be extended north along Red Maple Lane and extend around Red Maple Lane in both the east and west directions to serve the Colonial Woods neighborhood, as shown in Appendix A . Four-inch diameter PVC services would be extended from the 8-inch PVC mainline sewer to the property lines. 4.3.2 Water Service Twelve-inch diameter DIP watermain will be extended east along 62nd Street to Red Maple Lane. The watermain along 62nd Street is trunk watermain and will serve additional properties in the futur e. An 8-inch diameter DIP municipal water will be extended north along Red Maple Lane and loop around Red Maple Lane in both the east and west directions to serve the Colonial Woods neighborhood, as shown in Appendix A. The City will loop the system to an existing 8 inch stub that extends down from Fox Circle. Fire hydrants will be installed per City specifications. One inch diameter copper services would be extended to the property lines. 304