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The proposed storm sewer improvements also include the placement of new catch basins in the alley north of Pahl Avenue, in Pahl Avenue, and in the alley between Pahl Avenue and 27th Avenue NE to minimize the depth of flow in the alleys and the gutter line along with minimizing the bypass flow out on to Wilson Street from the street and alleys. The storm sewer in 27th Avenue NE will be extended east to Stinson Boulevard to minimize flow from the street out on to Stinson Boulevard. New catch basins will be placed in Roosevelt Street and at the intersection with 27th Avenue NE. This storm sewer system will be extended east to connect to the existing main in Wilson Street. The proposed storm sewer improvements are shown on Figures 8 and 9 in Appendix A. ,4. Street The reconstruction of the existing streets and alleys 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. The existing street and alley widths will be maintained in the new street sections to minimize impacts on the existing driveways, boulevards, and landscaping. The proposed street reconstruction areas are shown on Figures I and 2 and the typical section is shown on Figure 10 in Appendix A. 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. One foot of select granular material or "sand cushion" will be placed on the geotextile fabric to provide a firm base for the six inches of Class 5 aggregate base and 3.5 -inches of bituminous pavement. The alley section will be similar, but will only have 3.0 -inches of bituminous pavement. 4.5. 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 10000 1) that must be obtained by the City of St. Anthony from the Minnesota Pollution Control Agency (MPGA). The reconstruction of the existing sanitary sewers mains will require permits from the Minnesota Pollution Control Agency (MPGA) and the Metropolitan Council Environmental Services, and the reconstruction of the existing watermains will require a permit from the Minnesota Department of Health. The reconstruction of 39th Avenue may require a permit from the RCWD. This may require storm water treatment for the runoff from 39 th Avenue. The need for the permit will be determined during final design. 2007 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY WS13 PROJECT NO. 1626-22 PAGE 6