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2019 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY VILLAGE WSB PROJECT NO. R-011648-000 PAGE 4 3.PROPOSED IMPROVEMENTS 3.1 Silver Lake Road Flood Mitigation Improvements The existing 60-inch reinforced concrete pipe (RCP) trunk storm sewer along the west side of Silver Lake Road does not provide the necessary capacity to accommodate the current drainage. In addition, the existing low point, located approximately 250 feet south of Silver Lane, is also undersized, resulting in flooding of properties along the east side of the roadway during common (7-year) rain events. The existing storm sewer system will be improved with the addition of a new 36-inch RCP sewer main and catch basins along the roadway to better accommodate area drainage. The 36-inch RCP sewer main will extend from the existing low point located approximately 250 feet south of Silver Lane to approximately 600 feet north of Silver Lane and outlet to Silver Lake. The installation of the new sewer main will supplement the existing 60-inch sewer main to the west. To address the flooding along the east side of the roadway, it was identified to be more cost effective to install a secondary main along the roadway. The installation of the additional storm sewer main will not only alleviate existing flooding along the east side of Silver Lake Road, but also reduce flooding downstream to roadways with previous drainage concerns (Penrod Lane, Silver Lane, Fordham Drive, Shamrock Drive, 39th Avenue, and Foss Road). A map illustrating the proposed improvements can be found on Figure 2 of Appendix A. 3.2 County Road C (29th Avenue NE) Improvements Ramsey County and Hennepin County are proposing to reconstruct County Road C (29th Avenue NE) from Highway 88 to Interstate 35W in 2019. Improvements proposed along County Road C (29th Avenue NE) include reconstructing the existing roadway (including removal and replacement of the existing pavement, curb and gutter, and excavation of the underlying base materials), installation of a 10-foot bituminous trail along the south side of the roadway, installation of a 6-foot concrete sidewalk along the north side of the roadway, and drainage improvements. Additional improvements include the installation of a pond within the industrial park area to alleviate existing flooding concerns. Although the project is being designed and bid by Hennepin County and Ramsey County, the City of St. Anthony Village has been asked to participate in funding the trail, sidewalk, and drainage improvements. The proposed improvements along County Road C (29th Avenue NE) from Highway 88 to Long Lake Road can be found in Appendix C. 107