(A) All retail, commercial and industrial site developments must provide a site grading and drainage plan that includes drainage computations, detention of runoff (if required) and a detailed site grading plan that does not adversely affect adjacent lots, property or downstream property.
(B) A comprehensive grading scheme including all proposed lots shall be included with subdivision construction plans. The grading scheme will include arrows indicating the direction of flow of runoff for each lot. The finished floor slab elevation shall be a minimum of one foot above the average top of curb elevation fronting the lot. Where practical, all lots shall be graded from rear to front, at which point the drainage shall be intercepted by the street. If the minimum one-foot requirement can not be met due to land slope, topography or existing trees, alternate grading schemes may be utilized. In these instances it shall be demonstrated to the satisfaction of the City Engineer or Director of Public Works that grading from front to rear would be more reasonably adaptable to the existing topography. All lots that fall into this second category shall be identified on the final plat by a listing table.
(C) Finished floor elevations shall be shown for all lots adjacent to or encroaching upon the FEMA- designated 100-year floodplain. Finished floor elevations shall be a minimum of two feet above the ultimate base flood elevations.
(D) The applicant for a building permit for a residential lot that is included in the listing table described in division (B) above and is graded from front to rear shall prepare a detailed site-grading plan that includes elevations for all corners of the subject lot, the finished floor slab elevation, final contours, swales, and any modifications to side yard or rear yard fencing to facilitate removal of runoff from the subject lot.
(Ord. 2007-18, passed 6-26-07)