SWA000200_Stormwater Report_20230420

STORMWATER MANAGEMENT NARRATIVE
Stapleton Subdivsion
Phase 1 & 2
Forsyth County, NC
CLIENT:
CLAYTON PROPERTIES GROUP, INC.
CONTACT: WILL DISCKERSON
221 JONESTOWN ROAD
WINSTON-SALEM, NC 27104
W DE RRI C KS ON (a ,MUN G O. C OM
336-979-4054
March 1, 2023
Revised: March 10, 2023
Project No. 20-058
Joseph O'Buch, P.E.
Green Mountain Engineering, PLLC
[e-mail]
7A Wendy Court
Greensboro, 27409
[phone]

Introduction
The Stapleton subdivision is proposed to be located in Forsyth County. It consists of developing
approximately 14.33 acres on a previously undeveloped 60.41 acre site. This project is proposing 112
lots which is a lot density of 1.85 lots/acre as well as 23.612% BUA. This project is classified as a low
density project. Therefore, the project must meet the low density requirements of section 15A NCAC
02H .1003 of the NCDEQ stormwater manual. The site generally consists of two main drainage points
where water leaves the site through two existing streams. One located at the North West corner of the
site, that eventually discharges to Muddy Creek. The other through the center of the site, that eventually
drains to Muddy Creek. The project is shown to be constructed in two phases. As with most residential
subdivisions the development is completed in phases as homes are sold. This stormwater permit shall
cover phase 1 &2. No other future development not shown on the plans will occur.
Requirements
The project is proposing less than 24% built upon area, and less than 2 units/acre therefore the site is
considered low density and must meet all of the water quality low density ordinance and design manual
requirements.
Chapter E-lof the NCDEQ Stormwater Design Manual states the following requirements for "Low
Density Projects:
15A NCAC 2H .1003(2)(b): DISPERSED FLOW. Projects shall be designed to maximize dispersed
flow
through vegetated areas and minimize channelization of flow.
This project utilizes dispersed flow through vegetated conveyances to the maximum extent.
15A NCAC 2H .1003(2)(c): VEGETATED CONVEYANCES. Stormwater that cannot be released as
dispersed flow shall be transported by vegetated conveyances. A minimal amount of non -vegetated
conveyances for erosion protection or piping for driveways or culverts under a road shall be allowed by
the permitting authority when it cannot be avoided.
The 2 stormwater discharges that leave the site are discharge through vegetated areas.
Stormwater piping only used when necessary to cross roads.
15A NCAC 2H .1003(4): VEGETATED SETBACKS. Vegetated setbacks shall be required adjacent to
waters as specified in the stormwater rules to which the project is subject pursuant to this Section, in
addition to the following requirements applicable to all vegetated setbacks:
Setbacks are shown on existing streams.
15A NCAC 2H .1003(5): STORMWATER OUTLETS. Stormwater outlets shall be designed so that
they do not cause erosion downslope of the discharge point during the peak flow from the 10-year storm
event as shown by engineering calculations.
The discharge points will have rip rap energy dissipaters to not cause erosion.
15A NCAC 2H .1003(7): DEED RESTRICTIONS AND PROTECTIVE COVENANTS. The permittee
shall record deed restrictions and protective covenants prior to the issuance of a certificate of occupancy
to ensure that projects will be maintained in perpetuity consistent with the plans and specifications
approved by the permitting authority. The "Low Density Residential Subdivision Deed restrictions &
protective Covenants "form is included with this submittal.