Cherry_Point_Crossing_MS4_Approval_Letter.pdf

This is an MS4 (Municipal Separate Storm Sewer System) approval letter from Beaufort County, South Carolina, pertaining to the Cherry Point Preserve Stormwater Pipe project. The document provides regulatory approval for stormwater management improvements at the Cherry Point Preserve parcel (TMS #R600 013 000 0061 0000), a County-owned property located in Beaufort County parallel to Pritcher Point Road. The project involves installation of a 60-inch reinforced concrete pipe (RCP) culvert to maintain drainage flow through an existing ditch that bisects the property and ultimately discharges to the Okatie River. The improvements also include a gravel-stone surface crossing above the pipe to provide staff access from the entrance gate to the eastern portion of the property. Minimal tree removal is anticipated, with culvert design developed to avoid impacts to significant specimen trees where practicable. Drainage analysis for the 100-year storm event was conducted using the Rational Method within an AutoCAD Express model, determining appropriate sizing for 103.42 cubic feet per second (cfs). The project coordinates are N 180729.01 E 2023742.96 (N32 19 47.977 E279 04 36.688).

The approval letter confirms that the proposed stormwater crossing meets MS4 permit requirements and regulatory standards for the County. No utilities are proposed as part of the project since the site remains unoccupied. The existing drainage system originates from a 30-inch pipe extending from the Malind Bluff subdivision and naturally widens as it moves northeast through the property. This approval authorizes the County to proceed with implementation of the stormwater management improvements to facilitate necessary maintenance access while managing stormwater conveyance appropriately.