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2019 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY VILLAGE WSB PROJECT NO. R-011648-000 PAGE 7 Bituminous Mill and Overlay Improvements Improvements along Silver Lane and Silver Lake Terrace include milling down the existing bituminous pavement 1 3/4-inches along the full width of the roadway. A new 1 3/4-inches 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. New concrete curb and gutter along Silver Lake Terrace will also be installed to improve drainage and protect the edge of the existing roadway until the road can be reconstructed in the future. Additional improvements include removing and replacing a block retaining wall located at the northwest end of the cul-de-sac on Silver Lake Terrace. The existing 8-foot retaining wall is beginning to lean away from the roadway causing separation in the adjacent driveway. The retaining wall is proposed to be removed and a new large block wall installed. A map illustrating the mill and overlay improvements can be found on Figure 8 of Appendix A. The typical sections for the proposed mill an overlay improvements can be found on Figure 9 of Appendix A. 3.5 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 construction will also require a permit from the Rice Creek Watershed District (RCWD) and coordination with the Mississippi Watershed Management Organization (MWMO). This may require stormwater treatment for the runoff from the project area. 69