04-28-2021 Council Packet - Laserfiche WebLink

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15 Minimum Design Standards The following are minimum design standards applied to the design and construction of improvements in the City of Little Canada and are for reference to this policy. A. Streets Streets shall be classified pursuant to the hierarchy listed under definitions in Section I. Urban streets shall be constructed to a minimum seven (7) ton design based on characteristics of the underlying subsoils. Curb and gutter on City streets shall typically be B618. Arterial/MSA streets shall be nine (9) ton design and shall normally be constructed to Municipal State Aid (MSA) standards. Rural streets are not desirable. Therefore, for any rural street reconstruction project the City shall proceed as if the rural street is to be upgraded to urban design. Rural streets that are not upgraded will generally be rehabilitated via a bituminous overlay of 1.5” – 2” subject to the condition of the existing street. B. Storm Sewer Storm sewer improvements are considered to be an integral part of the street reconstruction. The Minnesota Department of Transportation uses a storm frequency of ten (10) years in designing highway drainage systems. The City of Little Canada uses a five (5) year storm for design of storm sewer systems. A storm frequency of 50 or 100 years is used if extensive damage would result from an inadequate storm sewer. A lesser storm frequency may be used for design purposes if an adequate overflow drainageway is present. C. Sidewalks, Trail, and Bikeways Concrete – 4” thick, 5’ wide, w/4”Class 5, 100% crushed rock. Bituminous – 2” thick, 8’ wide, w/6” class 6, 100% crushed rock Sidewalks and trails are to be located 1’ off the property line where possible. Pedestrian ramps and curb drops will be installed according to MN/DOT Standards and Americans with Disabilities Act (ADA) requirements.