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Feasibility Report 121st Avenue and Acres of Bald Eagle Utility & Street Improvements Project City of Hugo, MN WSB Project No. 018363-000 Page 6 No other storm sewer improvements are provided with these improvements. See Figure No. 5 in Appendix A for the proposed storm sewer layout. Overall, utility construction, specifically the sanitary sewer and watermain work in 121st Street will impact tree roots that extend under the roadway surface. Excavations to depths of 16-feet will likely damage tree root systems that are close to the roadway resulting in the loss of some trees. 4.2 Roadway Improvements 4.2.1 Streets The street improvements include restoration of an existing City street , and the construction of a new street in the development. During utility construction, 121st Street will be excavated and in need of restoration due to sanitary sewer and watermain construction over most of the length. Restoration consists of restoration and preparation of the subgrade surface, construction of a new 8-inch thick aggregate base and 4-inches of bituminous pavement. The existing roadway is narrow and meanders slightly in the corridor. The roadway restoration will provide a consistent roadway width of 20-feet with 10-foot driving lanes, one in each direction. No shoulder is proposed with the restoration to reduce grading impacts in the corridor. The proposed Broadway Court in the Acres of Bald Eagle development will be a City standard residential urban street, 28-feet wide with 14-foot drive lanes, surmountable concrete curb and gutter, 4-inches of bituminous pavement over 8-inches of aggregate base and 24-inches of select granular subgrade, per City details. See Figure Nos. 2 and 3 in Appendix A for the proposed street typical sections and Figure No. 5 in Appendix A for the proposed layout. 4.3 Right-of-Way/Easements Existing right of way along 121st Street varies in width from 30-feet to 60-feet along the corridor, with portions of the roadway outside of the right of way shown in digital County parcel data. As discussed previously, portions of the existing 121st Street are maintained by the City and have statutory user rights over the maintained portion of the roadway. Acquisition of additional rights of way and easements for 121st Street are not anticipated with the proposed improvements. The Acres of Bald Eagle development will dedicate right of way and easements with the plat, meeting current City standards for residential subdivisions. 4.4 Permits/Approvals The anticipated permits and approvals required, and the respective regulatory agencies are listed below: ▪ City of Hugo .............................................................. Drainage/Erosion Control Permit ▪ MPCA NPDES/SDS ...................................................................... Erosion/Stormwater ▪ MPCA ...................................................................................Sanitary Sewer Extension ▪ Metropolitan Council ............................................................Sanitary Sewer Extension ▪ Minnesota Department of Health ................................................ Watermain Extension