SW5240302_Stormwater Narrative_20240419

Siler City Asphalt Plant (formerly Mid-State Parcel Grading)
PROJECT NARRATIVE
The proposed project consists of the grading of a large, gently graded pad for the purpose of concrete
and asphalt recycling. The project area is approximately 52.94 acres. A disturbed area of
approximately 35.07 acres is planned for the erosion control and grading for this project. Currently
the site is almost entirely clear with limited woodland to the east side of the property. That area
consists of a mix of pines and hardwoods. Elevations range from 628 to 667 within the property. The
site erosion control is presented in one phase with 3 stages illustrated. The erosion control has
previously been approved with an updated submission made and subsequently approved. It includes
the conversion of the basins to the wet ponds. No wetlands or streams are present in the work
footprint. An environmental study was conducted, and the wetlands found have been shown on the
plan. A minimum separation of 50' is proposed from the existing pond and wetlands within the
project boundary and noted accordingly. A specific sequence of construction has been provided for
proposed work.
No roads are proposed as part of this project,only a gravel paved driveway. Stormwater management
is provided for the high density portions of the project area. There are three drainage areas that are
high density by definition, each with an SCM provided to provide water quality treatment.
The soil types for this property are all Type D soils. The pad grade will mimic existing drainage
patterns with measures installed to minimize the potential for rutting and rilling once groundcover is
established.
Piedmont Environmental has conducting the field tests for the SHWTs for each SCM location. That
report is included in the submittal.
Aric Geda, PE of Modulus, PLLC is preparing the appropriate documents for the NCG160000
Stormwater Management for the site in keeping with its use as an asphalt and concrete recycling
plant.
Please find attached all relevant stormwater calculations.