(A) Private road subdivisions shall follow the same submission and platting procedures as outlined in the Lexington County subdivision regulations for standard subdivisions. However, because the roads are proposed to be privately maintained, the review process is altered slightly. The Lexington County Planning Commission is authorized by those regulations to approve a project only upon its satisfaction as to the provisions for maintenance of the roads in the subdivision.
(B) To assist in this determination, the Commission requires a review of the preliminary plat drawings by the Planning and Development staff of Lexington County to determine compliance with the following guidelines.
(1) Road layout.
(a) Through roads which connect existing roads may not be approved if they are likely to be used by the general public.
(b) Road alignments which create inadequate sight distances are prohibited.
(c) Requirements for road names, signs, and layout shall be the same as found in § 151.048.
(d) Dead-end roads shall terminate in a turnaround with at least an 80-foot diameter.
(e) Road rights-of-way shall be of sufficient width to allow adequate maintenance of any proposed road. In most cases this will require a minimum 50-foot width on the roadway and 100-foot diameter on any cul-de-sacs. Projects proposed with less right-of-way must demonstrate the ability of the layout to accommodate maintenance.
(f) Road rights-of-way shall not conflict with previously executed public rights-of-way (utility, rail or road).
(2) Road design.
(a) Roads across pond dams are strongly discouraged.
(b) Roads shall be designed so as to require minimal maintenance by the future residents. Of primary concern are excessive slopes on the roads and low-lying areas with drainage needs. Sufficient engineering drawings must be submitted by the developer in order for this determination to be made.
(c) Unpaved roads may not be approved unless the following guidelines are met:
1. There are no more than ten (10) lots using the roadway;
2. The length of the roadway is less than 2,500 feet;
3. Slopes are such that the calculated velocity of water in the road and ditch sections is less than two and one-half (2-1/2) feet per second for sandy loam soils and four (4.0) feet per second for clay soils; and
(d) Paved roads must be designed to meet the standards of Lexington County for sub-base, base and pavement materials.
(3) Storm drainage system.
(a) The project shall be designed to properly handle storm drainage entering and leaving the site.
(b) Sediment and erosion control measures shall be required on all grading.
(c) Open ditches will be allowed outside the road right-of-way when the proposed ditch section has side slopes which are three-to-one (3/1) or flatter. Steeper slopes may be allowed if there is a good stand of grass.
(d) Steeper side slopes may also be allowed on major drainage channels as identified in Chapter 157 if they are submitted with a specific design treatment approved by the Planning Engineer or left in their natural condition with appropriate easements.
(Ord. passed 2-17-1986) Penalty, see § 151.999