SW5240202_Construction Sequence_20240627

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5410 Trinity Road P 919.866.4951
T I M M O N S GROUP Suite 102 F 919.859.5663
YOUR VISION ACHIEVED THROUGH OURS. Raleigh, NC 27607 www.timmons.com
June 26, 2024
NC Dept of Enviro. Quality
Raleigh Regional Office
Attn: Brianna Holland
512 N. Salisbury Street
Office 625 Y
Raleigh, NC 27604
Subject: CONSTRUCTION SEQUENCE/ NARRATIVE
Project Name: Wrenn Villas
County: Franklin
City: Youngsville
Dear Mr. Farkas,
The proposed 179 lot Townhome subdivision, Wrenn Villas, will be constructed as one project with
(1)one proposed Wet Pond SCM. SCM A will be constructed, as part of the subdivision improvements, to
reduce the pre-to post-development peak flows conditions for the 10-, 25-year, 24-hour storm event of the
proposed development. Additionally, this project will propose an 85% Total Suspend Solids removal and
will treat the required Water Quality Volume per NCDEQ requirements.
A pre-development and post-development hydrologic analysis was completed for the site using the
NRCS (SCS) method. A hydraulic analysis was completed using Hydraflow modeling software to route
these storm events through the proposed detention and outlet structures. The runoff from our project site
discharges Richland Creek and is part of the Neuse River Basin —Phase II ETJ Area. The Town of
Youngsville is not named Nutrient Sensitive Water Town therefore the site is subject to State's Neuse
Basin Rules, 15A NCAC 02H .1017
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