Any application for a development permit within the Regent Park Floodplain Overlay District shall meet the development permit and certification requirements of § 151.23 and include the following additional certification:
(A) Certification of no adverse impact.
(1) A professional engineer, land surveyor or architect, licensed in the State of South Carolina, shall certify that the development of the property, within and/or adjacent to areas of special flood hazard, will not adversely affect flood risks impacting any other properties, whether downstream, upstream and adjacent to, as measured at the property boundary by any of the following:
(a) Increase in flood elevation,
(b) Increase in flood stage,
(c) Increase in flood velocity,
(d) Increase in flood flow,
(e) Increased potential for scour, erosion and sedimentation,
(f) Decrease in flood storage or floodway width, and,
(g) Any other adverse impact deemed significant or as specified by the local administrator, unless the impact is mitigated as provided for in an approved community or watershed-based plan.
(2) This certification shall employ FEMA-approved standards for hydraulic and hydrological analysis to determine no adverse impact and all data shall be provided digitally for review and corroboration by the administrator or any governmental review agency acceptable to York County. All studies shall take into consideration a “full build out” condition for the studied watershed. This certification shall not be required if the conditions within § 152.44(H)(2) are met.
(Ord. 2924, passed 6-3-24)