02-07-2022 Council Work Session Packet

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Ms. Katie Larsen 1 /5/2022 Page 2 14) should be maintained and street entrance ditch crossings should utilize large and/or multiple pipe or box culverts. City and RCWD regulatory floodplain management requirements will also need to be met (See Floodplain below). WMP Goal 7.2 is to "Ensure that well -planned, quality residential... development accommodates the City's projected growth needs and occurs in a manner that also conserves and enhances the City's natural resources and amenities." To assist the City in meeting this goal, the applicant should provide the following for the proposed stormwater ponds and lakes: 1) shoreline geometry that more closely resembles natural bodies of water, 2) buffers for natural vegetation and high-water level bounce, 3) areas for future maintenance activities (e.g., pond/lake dredge material removal and dewatering) and 4) differentiation of the water quality and quantity function, goal, and design of both. Water Supply The existing properties are identified as a Stage 1A and 1B Planned Service Areas in the 2040 Comprehensive Plan. There is existing 12-inch diameter ductile iron pipe (DIP) water main along Robinson Drive and Century Trail south of the site and a 8-inch DIP water main on Carl Street (west cul-de-sac). There is a 10-inch DIP water stub for the Robinson Property off of Cardinal Way and two 12-inch diameter DIP water main stubs at the intersection of Robinson Drive and Century Trail. It is feasible to extend the water main to service the proposed lots. However, the size of the water main will have to be determined and the water main will need to be looped through the site. All proposed units will be required to connect to the City's water system. • Sanitary Sewer The existing properties are identified as a Stage 1A and 1B Planned Service Areas in the 2040 Comprehensive Plan and they are located in the 21 sanitary sub -district. There is existing 12-inch diameter polyvinyl chloride (PVC) sanitary sewer along Robinson Drive and 15-inch diameter PVC sanitary sewer along Century Trail. A sewer stub extends to the north from the manhole at the intersection of Robinson Drive and Century Trail with an invert of 879.78. There is a sanitary manhole at the north end of Cardinal Way with an invert of 883.18. The sanitary sewer on Cardinal Way is 10- inch diameter PVC. Inverts are according to record plans for the Century Farms North development. The 2040 Comprehensive Plan identifies future 10-inch diameter and 15-inch diameter trunk lines within the site. The 2040 Comprehensive Plan also identifies future forcemain along Sunset Avenue (CSAH 53) to the west of the site and future 10-inch and 12-inch trunk lines along Main Street (CSAH 14) north of the site. All proposed units will be required to connect to the City's sanitary sewer system. • Transportation The Robinson Property is located south of Main Street (CSAH 14), east of Sunset Avenue (CSAH 53) north of Robinson Drive and east of Century Trail. The concept plan includes an extension of Century Trail from Robinson Drive to Main Street (CSAH 14), extension of Robinson Drive to the east property line, a connection from the site to Robinson Drive at Cardinal Way and a new street access to Sunset Avenue (CSAH 53) between Robinson Drive and Main Street (CSAH 14). The following summarizes the data and analysis from the city's 2040 Comprehensive Plan. Robinson Property Concept Plan Engineering