Long gone are the days of building a 20 foot gravel road and selling lots off on both sides of it. Modern subdivision design requires the expertise of a Civil Engineer. If water and sanitary sewer are not available streets still have to be designed to certain standards and storm sewers sized and storm water released at a prescribed rate that varies from jurisdiction to jurisdiction. When public water and storm sewer are introduced into the design conflicts between utilities become certain. The Civil Engineer has to recognize those conflicts and adjust his design to overcome them.