Article 5: Development Standards
Section 5.7. Perimeter and Streetyard Buffers
5.6.7. Standards for Floodways and Non-Encroachment Areas
Morrisville, NC
June 23, 2017
Unified Development Ordinance
Page 5-29
All subdivision, manufactured home park, and other development proposals shall provide Base
Flood Elevation (BFE) data if development is greater than five acres or has more than 50
lots/manufactured home sites. Such Base Flood Elevation (BFE) data shall be adopted by reference
to be utilized in implementing this Ordinance.
When Base Flood Elevation (BFE) data is not available from a federal, State, or other source, the
reference level shall be elevated to or above the regulatory flood protection elevation.
5.6.7.
Standards for Floodways and Non-Encroachment Areas
Areas designated as floodways or non-encroachment areas within the Special Flood Hazard Areas are
extremely hazardous areas due to the velocity of floodwaters that have erosion potential and carry debris
and potential projectiles. The following standards shall apply to all development within such areas in addition
to the standards i
n 5.6.5, Standards for Special Flood Hazard Areas with Flood Elevation Data:A.
No encroachments—including fill, new construction, substantial improvements, and other development—
shall be permitted unless it has been demonstrated that:
The proposed encroachment would not result in any increase in the flood levels during the
occurrence of the base flood, based on hydrologic and hydraulic analyses performed in
accordance with standard engineering practice and presented to the Town Engineer before
issuance of a Floodplain Development Permit, or
A Conditional Letter of Map Revision (CLOMR) has been approved by FEMA and a Letter of Map
Revision (LOMR) is obtained upon completion of the proposed encroachment.
B.
If subsection
A aboveis satisfied, all development shall comply with all applicable flood hazard
reduction standards in
5.6.3throug
h 5.6.6.C.
Manufactured homes may be permitted provided the following provisions are met:
The anchoring and the elevation standards of Section
5.6.5.C, Manufactured Homes;and
The no encroachment standard of subsection
1above.
(Ord. No. 2014-051, 11/10/2014)
SECTION 5.7.
PERIMETER AND STREETYARD BUFFERS
5.7.1.
Purpose
A.
Perimeter buffers are intended to provide spacing and landscaping between proposed development
and adjoining property developed or zoned for significantly different uses to help mitigate potential
negative impacts on or from development activities on adjoining properties.
B.
Streetyard buffers are intended to provide spacing and landscaping between proposed development
and adjoining streets. These buffers mitigate potential adverse impacts from traffic on the adjoining
street, provide a transition between public and private realms, create an attractive, unifying edge along
the street for motorists and pedestrians, and provide shading of streets and sidewalks.
(Ord. No. 2016-001, 05/10/2016)
5.7.2.
Applicability
A.
New Development
Except as otherwise provided in Section
5.7.2.C, Exemptions,the standards in this section shall
apply to all new development.
(Ord. No. 2016-001, 05/10/2016)