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15 <br />streets shall typically be B618. Arterial/MSA streets shall be nine (9) ton design <br />and shall normally be constructed to Municipal State Aid (MSA) standards. <br /> <br /> Rural streets are not desirable. Therefore, for any rural street reconstruction <br />project the City shall proceed as if the rural street is to be upgraded to urban <br />design. Rural streets that are not upgraded will generally be rehabilitated via a <br />bituminous overlay of 1.5” – 2” subject to the condition of the existing street. <br /> <br />B. Storm Sewer <br /> <br /> Storm sewer improvements are considered to be an integral part of the street <br />reconstruction. The Minnesota Department of Transportation uses a storm <br />frequency of ten (10) years in designing highway drainage systems. The City of <br />Little Canada uses a five (5) year storm for design of storm sewer systems. A <br />storm frequency of 50 or 100 years is used if extensive damage would result from <br />an inadequate storm sewer. A lesser storm frequency may be used for design <br />purposes if an adequate overflow drainageway is present. <br /> <br />C. Sidewalks, Trail, and Bikeways <br /> <br /> Concrete – 4” thick, 5’ wide, w/4”Class 5, 100% crushed rock. <br /> <br /> Bituminous – 2” thick, 8’ wide, w/6” class 6, 100% crushed rock <br /> <br /> Sidewalks and trails are to be located 1’ off the property line where possible. <br />Pedestrian ramps and curb drops will be installed according to MN/DOT <br />Standards and Americans with Disabilities Act (ADA) requirements. <br />