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B. Storm Drainage System: The existing and proposed storm <br /> drainage facilities must be shown. The existing pipe sizes and <br /> types must be shown. Existing invert and rim elevations of the <br /> structures must be shown. <br /> <br /> Proposed pipe sizes, lengths and slopes must be shown on the <br /> plans. Invert and rim or top of curb elevations at structures <br /> and cleanouts must be labelled. <br /> <br /> 1. Structures <br /> <br /> Details must be shown for all storm drainage structures, or <br /> manufacturer's name and catalog numbers must be specified. <br /> The Engineer/Architect may be required to~ submit catalog <br /> details for the structures if the manufacturer is not <br /> familiar to the Engineering Department. All drainage <br /> structures to be in traffic areas must be strong enough to <br /> resist vehicle loads. <br /> <br /> 2. Pipes <br /> <br /> Pipe depths to finish grade and/or subgrade must be in <br /> conformance with the specifications of the pipe <br /> manufacturer. Pipe type need not be shown on the plans, <br /> unless C.M.P. (corrugated metal pipe) is required to be <br /> used, or is not permitted to be used due to its roughness <br /> factor. The Design Engineer must be consulted if a change <br /> in use of CMP is contemplated. Any pipe type permitted in <br /> Appendix "D" and IAPMO IS 1-76 of the UPC may be used. <br /> Joints and connections shall be made as specified by the <br /> pipe manufacturer or as specified in Chapter 8 of the U.P.C. <br /> If the distance between a storm pipe and another pipe is <br /> less than a nominal six (6) inches at a crossing, the pipe <br /> on the bottom at the crossing must be either Ductile Iron or <br /> Cast Iron Pipe or a high strength pipe approved by the City <br /> Engineer. See City Standard Specifications Sections 18- <br /> 04(h) and 19-04-e. <br /> <br /> There is no minimum slope requirement for storm pipes. <br /> Every effort should be made by the Architect or Engineer to <br /> design the storm drainage system so that a minimum flow <br /> velocity of 2 feet per second will occur either when the <br /> pipe is flowing full or part full. <br /> <br /> There is no minimum size for onsite storm pipe. Maintenance <br /> and accessability should be kept in mind, however. <br /> <br />C. Hydroloqy and Hydraulic Calculations: Hydrology and <br />hyraulic calculations must be done for the storm system from the <br /> <br /> 12 <br /> <br /> <br />