Secondary and Cumulative Impacts Master Management Plan - 2014

Article 5: Development Standards Section 5.6. Floodplain Management 5.6.1. Purpose

SECTION 5.6. FLOODPLAIN MANAGEMENT 316

5.6.1. Purpose

The purpose of this section is to set forth methods and provisions for minimizing the risks of flooding and flood damage in the Floodplain Overlay (FO) District. Specifically the standards in this section are intended to: A. Restrict or prohibit development that is dangerous to health, safety, and property due to water or erosion hazards, or that result in damaging increases in erosion or in flood heights or velocities; B. Require development vulnerable to floods, including facilities serving such development, to be protected against flood damage at the time of initial construction; C. Control the alteration of natural floodplains, stream channels, and natural protective barriers, which help accommodate or channel floodwaters; D. Control filling, grading, dredging, and other development that may increase flood damage; and E. Prevent or regulate the construction of flood barriers that will unnaturally divert floodwaters or which may increase flood hazards in other areas. 1. An Elevation Certificate (FEMA Form 81-31) is required before the actual start of any new construction. It shall be the duty of the applicant for a Floodplain Development Permit to submit to the Planning Director a certification of the elevation of the reference level, in relation to mean sea level. The Planning Director shall review the certificate data submitted. The permit holder shall correct deficiencies detected by such review before the application for a Floodplain Development Permit may be approved. Failure to submit the certification or make required corrections of it shall be cause to deny a Floodplain Development Permit. 2. An Elevation Certificate (FEMA Form 81-31) is required after the reference level is established. Within seven calendar days after establishment of the reference level elevation, it shall be the duty of the holder of a Floodplain Development Permit to submit to the Planning Director a certification of the elevation of the reference level, in relation to mean sea level. Any work done within the seven-day calendar period and before submittal of the certification shall be at the permit holder‘s risk. The Planning Director shall review the certificate data submitted. The permit holder shall correct deficiencies detected by such review immediately, and before proceeding further on the work being permitted. Failure to submit the certification or make required corrections shall be cause to issue a stop work order for the development. 3. A final as-built Elevation Certificate (FEMA Form 81-31) is required after construction is completed and before issuance of a Certificate of Compliance/Occupancy. It shall be the duty of the holder of a Floodplain Development Permit to submit to the Planning Director a certification of final as-built construction of the elevation of the reference level and all attendant utilities. The Planning Director shall review the certificate data submitted. The permit holder shall correct deficiencies detected by such review immediately, and before issuance of a Certificate of Compliance/Occupancy. In some instances, another certification may be required to certify corrected as-built construction. Failure to submit the certification or make required corrections shall be cause to withhold the issuance of a Certificate of Compliance/Occupancy. 5.6.2. Required Certificates A. Elevation Certificates

316 This carries forward the floodplain management standards in the current Flood Damage Prevention Ordinance (Ch. 26 of the Code of Ordinances, modified only to clarify wording. Those parts of Ch. 26 pertaining to the Floodplain Development Permit are located in Article 2: Administration. Those parts of Ch. 26 pertaining to the establishment of the area subject to these floodplain management standards are in the regulations for the Floodplain Overlay (FO) District, in Article 3: Zoning Districts.

Morrisville, NC

June 2013 Page 5-21

Unified Development Ordinance - Public Hearing Draft