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2019 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY VILLAGE WSB PROJECT NO. R-011648-000 PAGE 5 Bituminous Trail and Sidewalk Improvements A 10-foot-wide bituminous trail and 6-foot-wide concrete walk is anticipated along County Road C (29th Avenue NE) from Highway 88 to Interstate 35W. The trail and sidewalk improvements improve pedestrian and vehicle safety by providing an off-street access route for pedestrians. As the installation of the trail and sidewalk provides direct benefit to St. Anthony Village residents, the City will be required to provide funding for 50% of the improvement cost for the bituminous trail and 75% of the improvement cost for the concrete sidewalk. Additionally, the removal and replacement of the concrete curb and gutter to facilitate the trail and sidewalk construction will require 50% cost participation. A map illustrating the proposed trail and sidewalk improvements can be found on Figure 3 of Appendix A. Drainage Improvements Reconstruction of the roadway provides the City an opportunity to review and assess the condition of the existing infrastructure. Existing utilities located along County Road C (29th Avenue NE) include 9-inch vitrified clay pipe (VCP) sanitary sewer main along the north side of the roadway, 6-inch cast iron pipe (CIP) watermain along the north side of the roadway, 12-inch ductile iron pipe (DIP) trunk watermain along the south side of the roadway, and 12-inch to 36-inch RCP storm sewer main along the south side of the roadway. The existing storm sewer will be reconstructed to address drainage concerns and localized ponding/flooding. The cost participation for the drainage improvements is calculated based on the contributing drainage areas, estimated to be 75% City. The existing drainage was also reviewed within the industrial park, located south of County Road C (29th Avenue NE). Currently, various buildings within the industrial park experience flooding during common rain events (2-year). The existing roof drainage and limited adjacent storm sewer does not provide adequate storm conveyance and storage from the industrial park. A filtration system was constructed in 2017, located on the eastbound sided of County Road C (29th Avenue NE), just east of the Municipal/County boundary. The outlet control structure on this filtration system is not preforming as designed. This filtration system is discharging water southwest between buildings, onto Anthony Lane S, before making its way to the flood pond. Improvements proposed to alleviate the flooding concerns within the industrial park include reconstructing the existing outlet control structure of the filtration system to discharge west down the County Road C (29th Avenue NE) ditch. Drainage patterns would remain and prevent stormwater from flowing between buildings and over Anthony Lane S. Additionally, expansion of the existing flood pond located between the cemetery and the industrial park will provide additional stormwater storage and prevent flooding of the industrial are during larger rain events (100-year). 108