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may require landscape screening. 25. Environmental manholes (three-foot sumps) shall be constructed as the last structure that is road accessible prior to discharge to any water body. Additional protection may be required when outletting to a sensitive water body. 26. For all storm pipes that outlet to a pond or other water body, show the elevation contour of the NWL in the plan view. 27. Provide a storm sewer schedule on the plans using the following format: STORM SEWER SCHEDULE STRUCTURE NO. SIZE CASTING BUILD CBMH 1 48" R -3290-V 4' Structures shall be classified as a catch basin (CB), catch basin/manhole (CBMH), or manhole (MH). CB's are inlet structures with a total of one pipe either entering or leaving. CBMH's are inlet structures with more than one pipe either entering or leaving. MH's are all non -inlet structures. Standard inlet castings are: R -3290-V when in the curb line and R-4342 when outside of paved areas. The standard MH casting is R-1642. 28. A four inch solid drain tile shall be stubbed out of structures at street low points and for lots that are not adjacent to a pond/wetland in accordance with the detail plates. Cleanout risers are required every 100' and at the terminus end of the line (see Detail Plate). E. STREETS 1. Flexible pavement design shall be based on design procedures set forth by the Minnesota Department of Transportation. Residential streets shall be designed for a minimum seven -ton pavement design. 2. Soil borings and/or special design considerations maybe required by the City Engineer in areas where unstable soils exist. 3. The roadway subgrade shall be constructed per MnDOT Specification 2105 and test rolling per MnDOT Specification 2111 shall be required. The test roller and amount of allowable deflection shall be as specified in the Special Technical Condition Specifications. 4. Street alignment for local streets, both vertical and horizontal, shall be designed for 30 MPH design speed based on the latest edition of the American Association of State Highway and Transportation Officials Manual unless otherwise approved by the City Engineer.