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Feasibility Report 2021 Street and Utility Improvement Project City of St. Anthony Village WSB Project No. 015900-000 PAGE 7 4. PROPOSED IMPROVEMENTS 4.1 STREET AND UTILITY IMPROVEMENTS 4.1.1 Sanitary Sewer The existing 9-inch VCP will be reconstructed with 8-inch polyvinylchloride (PVC) pipe, including the replacement of sanitary sewer services. All services are proposed to be replaced with 6-inch PVC pipe from the sewer main to the right-of-way. Replacing aging trunk utility facilities at the same time as the road construction is a proactive means by which to mitigate future maintenance costs. The proposed sanitary sewer improvements are shown on Figure 4 in Appendix A. In preparation for the project, individual services were televised beyond the right-of-way to identify and locate deficiencies. The results of the televising will be made available to property owners, along with a copy of the televising video, and a recommendation based on the televising inspection. Costs associated with these improvements are the responsiblity of the property owner. However, the City will allow property owners to have the private repairs to their sanitary sewer service added to the project assessment on their property. 4.1.2 Water Main The existing 6-inch CIP is proposed to be replaced with 8-inch ductile iron pipe (DIP) including the replacement of water services up to and including the curb stop. Services will be replaced up to the right-of-way with the appropriate 1-inch copper service pipe. All existing water main in the project area will be equipped with new valves and hydrants as necessary for proper operation and fire protection. Replacement of existing services will alleviate head loss and increase water pressure to properties by providing a clean service pipe. The proposed water system improvements is shown on Figure 5 in Appendix A. 4.1.3 Storm Sewer Reconstruction of the road provides the opportunity to improve drainage in the area by installing additional storm sewer facilities. The existing storm sewer system will be improved by the addition of catch basins along the roadway to better accommodate area drainage and the extension of new storm sewer where facilities do not currently exist. The proposed storm sewer improvements is shown on Figure 6 in Appendix A. Draintile is also proposed along the curb line to allow properties to connect their foundation drain and sump pumps into the storm sewer system. Redirecting this flow to the storm sewer system will help minimize the treatment of unnecessary clear water that may be discharging into the sanitary sewer system. 4.1.4 Street Reconstruction of the existing street is intended to improve the design strength of the pavement system and provide a street surface with an extended life for the City of St. Anthony Village. Roadways are proposed to be replaced at their current width from back-of-curb to back-of-curb, which allows for two 12-foot driving lanes and 2-foot reaction areas on each side of the street. Street grades are proposed to match closely with existing grades to minimize construction impacts to adjacent properties. 44