Morrisville Unified Development Ordinance – September 2018

Article 3: Zoning Districts Section 3.8. Overlay Districts 3.8.3. Floodplain Overlay (FO) District

b. Airport Overlay-B New construction, or substantial improvement, of buildings within the Airport Overlay-B District shall be designed to limit interior noise from aircraft to an average day/night sound level (DNL) of 45 dB in the following use categories if permitted in Table 4.2.4, Principal Use Table: (1) Household Living Uses (e.g. dwellings or family care homes); (2) Group Living Uses (e.g. congregate living facilities, dormitories, or rooming houses); (3) Community and Government Service Uses (e.g. clubs or lodges, elementary, middle and high schools, cultural facilities, day care centers, places of worship, or sports academies); (4) Health Care Uses (e.g. hospitals, nursing homes); and (5) Visitor Accommodation Uses (e.g. bed and breakfasts or hotel/motels). c. Applications for a Building Permit for any building subject to the standards in subsection a above shall include the written certification by a Professional Engineer or Licensed Architect experienced and qualified in the field of acoustical testing and engineering that the proposed new construction will comply with the applicable standards. Avigation Easement The developer of new development in the Airport Overlay-A District or Airport Overlay-B District shall grant an avigation easement to the Raleigh-Durham Airport Authority for the subject property where needed to ensure the safe approach and departure of aircraft to and from the Raleigh- Durham International Airport. A copy of the recorded avigation easement shall be provided to the Planning Director before issuance of any Certificate of Compliance/Occupancy for a building on the property. (Ord. No. 2016-001, 05/10/2016) A. Findings and Purpose The flood prone areas within the jurisdiction of the Town are subject to periodic inundation. The cumulative effect of obstructions in floodplains cause increases in flood heights and velocities and the occupancy in flood prone areas of uses vulnerable to floods increase the likelihood of loss of life, property, health and safety hazards, disruption of commerce and governmental services, extraordinary public expenditures for flood protection and relief, and impairment of the tax base, all of which could adversely affect the public health, safety and general welfare. The purpose of the Floodplain Overlay District is to minimize these risks and losses by provisions designed to: a. Protect human life and health; b. Minimize expenditure of public money for costly flood control projects; c. Minimize the need for rescue and relief efforts associated with flooding and generally undertaken at the expense of the general public; d. Minimize prolonged business losses and interruptions; e. Minimize damage to public facilities and utilities (i.e. water and gas mains, electric, telephone, cable and sewer lines, streets and bridges) that are located in flood prone areas; f. Help maintain a stable tax base by providing for the sound use and development of flood prone areas; and 3.8.3. Floodplain Overlay (FO) District

Morrisville, NC

September 25, 2018

Unified Development Ordinance

Page 3-65