SW6240904_Stormwater Narrative_20241007

5245 Red Hill Church Rd
FLEET TEMPLE Coats, NC 27521
ENGINEERING 910.658.2446
[e-mail]
PLLC Firm License P-2357
Signature Home Builders-Turlington Rd.
Grove Township, Harnett County
09.15.2024
PROJECT NARRATIVE
Project&Site Description
The purpose of this project is to develop a 70.0 acre residential subdivision.The property is existing farmland
and woodland. Existing topography drains mainly to the south and east at slopes of approximatelyl%-7%to
Bear Branch and to Walker's Creek. Wetlands have been delineated on site. No wetlands will be disturbed
during construction of the property The Site is limited to maximum 24%impervious area upon build-out (Low
Density Development).
Adjacent Property
The land uses in the surrounding areas are residential and agricultural.
Soils
The soils in this project consist of NoA (Norfolk loamy sand, 0 to 2% slopes) and NoB Norfolk loamy sand,2 to
6%slopes).
NoA is categorized as well drained, moderately permeable, and is well suited to most urban and recreational
uses. NoB is categorized as well drained, moderately permeable, and is well suited to most urban and
recreational uses.
Planned Stormwater Management, Erosion and Sediment Control
As shown on the Erosion Control Plan the project will be controlled and stabilized with diversion berms, silt
fence, rock check dams, and temporary skimmer basins with baffles. Diversion berms will be constructed
from topsoil graded from the site and will
be backed with silt fence where needed. All measures will be constructed and maintained to NCDEQ &
Harnett County standards and requirements.
After erosion control measures are removed. Surface waters from the roadway areas will drain via grassed
roadside ditches to owner maintained grassy swales which will convey the runoff from the property.
Impervious areas on some portions of the lots will surface drain through the grassed yard areas over the
natural contours of the Site. Project impervious percentage is limited to 24%. Proposed impervious limits as
follows:
IMPERVIOUS AREA CALCULATIONS:
PROPERTY AREA: 516,350SF (11.85AC)
MAX 24% IMPERVIOUS AREA (LOW DENSITY): 123,924SF
PROPOSED IMPERVIOUS AREA:
STREET& R/W: 18,496SF
IMPERVIOUS AREA PER LOT: 7 LOTS @ 14,000SF/LOT=98,000SF
TOTAL PROPOSED IMPERVIOUS AREA: 116,496SF
PROPOSED IMPERVIOUS %: 22.6%
14,000 SF MAXIMUM IMPERVIOUS AREA PER LOT (INCLUDES AREA BETWEEN R/W AND EDGE OF
PAVEMENT)