A plan for the drainage of the parcel to be subdivided shall be submitted showing:

    A.    The delineation of the drainage area in which the subdivision is located, and the location of drainage courses and surface water flow within the drainage area. This information may be shown on USGS topographic maps;

    B.    The existing on-site drainage facilities and a plan for storm water drainage for the parcel showing a method of dispersion or retention. The plan shall take into account water entering the subdivision from adjacent lands and water within the boundaries of the subdivision. This information shall be noted on a map drawn at the same scale as the plat. (Prior code § 28-22)