Morrisville UDO - June 2017 version

Article 3: Zoning Districts

Section 3.8. Overlay Districts

3.8.1. General

Morrisville, NC

June 23, 2017

Unified Development Ordinance

Page 3-61

[1] May be waived by the Town Council on finding that creative planning of a smaller site is necessary to address a physical

development constraint, protect natural areas, or promote as community goal when more conventional development would result in

more difficult or undesirable development.

(Ord. No. 2014-051, 11/10/2014; Ord. No. 2015-002, 04/29/2015; Ord. No. 2016-001, 05/10/2016)

SECTION 3.8. OVERLAY DISTRICTS

3.8.1.

General

General Purpose of Overlay Districts

Overlay zoning districts are superimposed over portions of one or more underlying base, conditional, or

planned development zoning districts with the intent of supplementing generally applicable development

regulations with additional development regulations that address special area-specific conditions, features,

or plans while maintaining the character and purposes of the underlying districts. Some overlay districts

include standards that modify or supersede standards applied by the underlying district.

Classification of Overlay Districts

Land shall be classified or reclassified into an overlay zoning district only in accordance with the procedures

and requirements set forth in Sectio

n 2.5.3, Rezoning,

and this section.

3.8.2.

Airport Overlay (AO) Districts

Purpose

The purpose of the Airport Overlay Districts is to promote the most appropriate use of land affected by

airport activities associated with the Raleigh-Durham International Airport. More specifically, the districts are

intended to ensure the safety and welfare of the community from danger from falling aircraft and the

annoyance and potential adverse health impacts of aircraft noise, and to ensure that development within

the districts are compatible with activities associated with air traffic and services associated with the airport.

To achieve these purposes, district regulations are intended, to the extent possible, to limit land uses to

specific industrial, commercial, agricultural, recreational, and other nonresidential uses that are not subject

to high population concentrations; restrict the aboveground storage of materials that pose major safety

hazards if subject to an airplane crash; limit land uses particularly sensitive to aircraft noise within the area

subject to average day/night sound levels (DNL or Ldn) of 65 decibels (dB) or greater; limit land uses and

development that pose potential obstructions to safe air traffic and effective air traffic control; and ensure

that development near the airport is located, designed, constructed, and maintained in a manner that

minimizes exposure to safety risks associated with the airport, mitigates noise impacts, and avoids

impediments to safe and efficient airport operations.

Applicability

The regulations in this section apply to the Airport Overlay-A (AO-A) and Airport Overlay-B (AO-

B) Districts.

The Airport Overlay-A (AO-A) District consists of that part of the area subject to an average

day/night sound level (DNL) from aircraft noise of 65 dB or greater (as established by the Raleigh-

Durham Airport Authority and shown on the Town of Morrisville RDU Contours Map) located east

of Chapel Hill Road (NC54). The Airport Overlay-B (AO-B) District consists of that part of such area

located west of Chapel Hill Road (NC54).