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2018 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY VILLAGE WSB PROJECT NO. 010507-000 PAGE 7 After the subgrade excavation is completed in the streets, a geotextile fabric will be placed to separate the existing underlying soft materials from the granular materials. Twleve inches (12”) of select granular material or "sand cushion" will be placed on the geotextile fabric to provide a firm base for the eight inches (8”) of Class 5 aggregate base and four inches (4”) of bituminous asphalt pavement. Macalaster Drive, Foss Road, and Highcrest Road are existing concrete pavement. These streets will be replaced with bituminous asphalt pavement per City Council Resolution 07-022. The decision was reached following the outcome of the Street Reconstruction Task Force report presented on November 13, 2007. Improvements along Anthony Lane include milling down the existing bituminous pavement 1 3/4-inches along the full width of the roadway. A new 2-inch wear course will then be paved over the entire street extending the pavement life of the roadway until the road can be reconstructing in the future. The proposed typical sections are shown on Figure 7 in Appendix A. 4.5 Central Park Splash Pad Water Reuse Retrofit Water used for the Central Park splash pad will be collected and routed to the existing water reuse facility which currently collects and reuses stormwater runoff for irrigation at Central Park. The existing water reuse system however, is augmented with potable water during dry periods (on avarge 2.4 million gallons annually). The addition of the runoff from the splash pad is expected to reduce and potentially eliminate the need for potable water use for irrigation as splash pad use increases with hot dry weather. The water reuse facility is located near the intersection of Silver Lake Road and 33rd Avenue NE. A lift station would need to be installed to pump the water to overcome the 20 feet of head difference from the splash pad to the water reuse facility to tie into the existing irrigation system. The proposed splash pad improvements are shown on Figure 8 in Appendix A. 4.6 Permits and Approvals Reconstruction of the roadways will disturb over one acre and will require a National Pollution Discharge Elimination Systems (NPDES) General Storm Water Permit (MNR 100001) that must be obtained by the City of St. Anthony Village from the Minnesota Pollution Control Agency (MPCA). The reconstruction of the existing water main will require a permit from the Minnesota Department of Health. The reconstruction will also require a permit from the Rice Creek Watershed District (RCWD). This may require stormwater treatment for the runoff from the project area. 33