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SECTION 4 <br /> DOCUMENTATION <br /> Design calculations shall be submitted at the time plans for <br /> storm drainage facilities are submitted for approval. These <br /> calculations shall include: <br /> 4.1 Draina&e map showing <br /> t . a. All lines and inlet points <br /> b. Drainage areas contributing to each inlet point <br /> c . Designations for the above <br /> 4.2 Storm calculation sheet (see Fig. 4-1 for form) showing: <br /> a. Drainage area .in acres <br /> b. Time of concentration <br /> c. Runoff coefficient for each area <br /> . Flow rate to each structure <br /> e. Flow rate and velocity in each pipe <br /> f. Pipe diameter, length and slope <br /> g. Flow line elevation of each pipe at structure <br /> h. List of assumptions , if any, which effect the design <br /> 4-1 <br />