Unified Development Ordinance, 31st Supplement, May 2024

CHAPTER 9. ​NATURAL RESOURCE PROTECTION | Article 9.3. Floodprone Area Regulations

with the FEMA Technical Bulletin 2, Flood Damage-Resistant Materials Requirements (the most recent document shall be utilized). 4. All new electrical, heating, ventilation, plumbing, air conditioning equipment, and other service facilities shall be designed and/or located at or above the RFPE to prevent water from entering or accumulating within the components during conditions of flooding. Such service facilities or equipment shall include, but are not limited to, HVAC equipment, ductwork, electric/gas meters panels/boxes, utility/cable boxes, appliances (washers, dryers, refrigerators, freezers, etc.), hot water heaters, and electric outlets/ switches. a. When an existing service facility and/or equipment is proposed to be replaced and is part of a substantial improvement, the electrical, heating, ventilation, plumbing, air conditioning equipment, and/or other service equipment shall meet the above standards in Sec. 9.3.5.A.4. b. When an existing service facility and/or equipment is proposed to be replaced and is not part of a substantial improvement, the service facility and/or equipment may be installed at the original location provided the addition and/or improvements comply with the standards for new construction consistent with the City Code and requirements for the original structure. 5. All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system. 6. All new and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters. 7. All new and replacement on-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding. 8. Nothing in this Article shall prevent the repair, reconstruction, or replacement of a building or structure existing on July 19, 2022 and located totally or partially within the floodway, non-encroachment area, or stream setback, provided there is no additional encroachment below the RFPE in the floodway, non-encroachment area, or stream setback, and provided that such repair, reconstruction, or replacement meets all of the other requirements of this Article and Article 11.4.

9. No chemical storage facilities which store or process acetone, acetylene gas, ammonia, benzene, calcium carbide, carbon disulfide, celluloid, chlorine, gasoline, hydrochloric acid, hydrocyanic acid, magnesium, materials or fuel which are flammable or explosive, nitric acid, oxides of nitrogen, petroleum products, phosphorus, potassium, sodium, sulfur, or any other items which in time of flooding are buoyant or could be injurious to human, animal, or plant life are allowed in any SFHA. 10. No new solid waste disposal facilities, hazardous waste management facilities, and salvage yards are allowed in any SFHA. 11. All subdivision proposals and other development proposals shall be consistent with the need to minimize flood damage. 12. All subdivision proposals and other development proposals shall have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize flood damage. 13. All subdivision proposals and other development proposals shall have adequate drainage provided to reduce exposure to flood hazards. 14. All subdivision proposals and other development proposals shall have received all necessary permits from those governmental agencies for which approval is required by federal or state law, including, but not limited to, Section 404 of the Federal Water Pollution Control Act Amendments of 1972, 33 U.S.C. 1334. 15. For new construction and substantial improvements, when a structure is partially located within a SFHA, the entire structure shall meet the SFHA standards for new construction and substantial improvements. 16. For new construction and substantial improvements, when a structure is in a flood hazard risk zone with multiple BFEs, the standards for the more restrictive flood hazard risk zone and the highest BFE shall apply. 17. For new construction and substantial improvements, buildings and structures that are in more than one SFHA shall comply with the standards associated with the most restrictive SFHA. B. Specific SFHA Standards Work permitted within all SFHAs shall meet the following specific standards:

Supp. No. 31

9 – 34 Published May 2024

Part 10: Unified Development Ordinance City of Raleigh, North Carolina