SW3210101_300-SIA Report_20210111

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THE GLENNS
Stormwater Impact Analysis and Final Design of Stormwater Control Measure
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WADAMS
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THE GLENNS
The Town of Wingate, North Carolina
Stormwater Impact Analysis &
Design of Stormwater Control Measure
Project Number: TRU-19030
Designed By: Michael Duval, PE
Date: December 2020
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MCADAMS
3430 Toringdon Way, Suite 110
Charlotte, North Carolina 28277
NC Lic. # C-0293

9 MCADAMS STORMWATER IMPACT ANALYSIS
GENERAL DESCRIPTION
Located east of Ansonville Rd and north of Monroe Expressway in the Town of Wingate in Union County,
North Carolina, is the proposed development known as The Glenns. The existing site consists of areas of
woods and trails. Proposed development on this site will consist of the construction of single-family
homes, along with associated roads, sidewalks, utility improvements and one stormwater control
measure.
The proposed development is located within the Yadkin River basin with stormwater runoff from the
proposed development draining into the Meadow Branch & Austin Branch in the Richardson Creek
Watershed. Per Town of Wingate regulations, stormwater management on this site shall meet the
stormwater management performance standards for development set forth in the Town of Wingate Code
of Land Ordinances & NCDEQ MDC. These are as follows:
6.5 Stormwater Management for the Town of Wingate, NC.
All developments shall be constructed and maintained so that adjacent properties are not unreasonably
burdened with surface waters as a result of such developments.
A. No development may be constructed or maintained so that such
development impedes the natural flow of water from higher adjacent
properties across such development, thereby causing damage to such higher adjacent properties;
and
B. No development may be constructed or maintained so that surface
waters from such development are collected and channeled onto lower
adjacent properties at such locations or at such volumes as to cause damage to lower adjacent
properties.
15A NCAC 02H.1003 NCDEQ Requirements that apply to all projects.
DESIGN REQUIREMENTS FOR HIGH DENSITY PROJECTS. High density projects are projects that do not
conform to Item (2) of this Rule. High density projects shall meet the following minimum design criteria:
(a) TREATMENT REQUIREMENTS. SCMs shall be designed, constructed, and maintained so that the
project achieves either "runoff treatment" or "runoff volume match" as those terms are defined in Rule
.1002 of this Section.
(b) OFF -SITE STORMWATER. Stormwater runoff from off -site areas and existing development shall not be
required to be treated in the SCM. Runoff from off -site areas or existing development that is not
bypassed shall be included in the sizing of on -site SCMs at its full built -out potential.
(c) OFF -SITE SCM. A project that controls runoff through an off -site SCM shall be allowed on a case -by -
case basis as determined by the permitting authority if the off -site SCM meets the provisions of Rules
.1050 through .1061 of this Section.
(d) EXPANSION OR REPLACEMENT OF EXISTING DEVELOPMENT. When new built -upon area is added to
existing development or existing development is replaced with new built -upon area, only the area of net
increase shall be subject to this Section.
creating experiences through experience 3430 Toringdon Way, Suite 110, Charlotte, NC 28277 / 704. 527. 0800