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� <br />BASIS OF DESIGN <br />L_J <br />For ,a lengthy discussion of the principles of storm sewer design we would <br />again refer you to the Storm Sewer Mastex P�an of 19b2. Briefly, the same <br />general methads were used in this study and may be �tated as f�llows: <br />Method: <br />Rainfall Fr��,uency: <br />Runoff Ceefficients: <br />Pipe Velocities: <br />Location of Pipe: <br />Rational� taking into a�count <br />time of concentration. <br />Five year average frequency. <br />Residentisl - a.25 to 0.30 <br />Non-residential- 0.60 to 0.70 <br />Minimum - 3.0 ft/sec. <br />Kaximum - 15.0 ft/sec. <br />Generally on opposite side of <br />s[reet from water main. <br />Design calculations for tha various phases are included within special copies <br />of report submitted directly to your Villa�e Director of Public Works. <br />� � � <br />