Requirements for the preliminary plat shall be:
(a) The owner shall prepare a preliminary plat and profiles of all streets, and other required infrastructure improvement using AutoCAD on sheets that are twenty- four (24) inches by thirty-six (36) inches.
(b) The scale of the plat shall be not less than one (1) inch equals fifty (50) feet; the profiles which may be prepared on standard cross-section paper shall have a horizontal scale of one inch equals fifty feet and a vertical scale of one inch equals five feet.
(c) The preliminary plat, which shall be plotted on a topographic survey, using two (2) foot contours, shall show the boundary outline of the land to be allotted; the location and names of boundary streets or streets terminating at the boundaries; the proposed arrangement of streets and sublots with accurate dimensions, and delineate all wetlands, streams, watercourses, proposed retention basins and other storm water management controls, and all proposed sanitary sewer and central water connections. The topographic survey shall be made by taking levels on a cross-section grid at fifty-foot intervals and shall be contoured to show existing conditions and proposed revisions adjusted to grade of houses and regrading of yards. The topographic survey shall also show all existing watercourses, culverts, storm and sanitary sewers, water mains and all existing features pertinent to the plotting of the allotment.
(d) The preliminary profiles shall show the existing elevations on the center line and at the side lines of the streets at intervals of fifty feet and at such intermediate points where there is a sharp break in grade. A proposed center line profile with vertical curves at each grade change shall be shown.