November 1, 2018
LUXURY TOWNHOME DEVELOPMENT
Shines Thanks to StormCapture® Rainwater Detention System
Charlotte, North Carolina
DESIGN & CONSTRUCTION TEAM
General Contractor: Heard Ratzlaff Construction, Charlotte, North Carolina
Contractor: Siteworks LLC, Charlotte, North Carolina
Engineer: OEG
Developer: Wendy Field & T.H. Dorsett, Inc.
Site Designer: Osborn Engineering Group, Charlotte, North Carolina
Precastor: Oldcastle Infrastructure
The Cottages at Providence is a new luxury townhome development by Wendy Field Consulting. The site designer Orsborn Engineering Group of Charlotte, North Carolina, needed a combination stormwater detention and sand filter system to control and remove pollutants from post-construction runoff for this very dense urban development.
In order to accomplish this, the site required a 17,000 cubic foot stormwater detention and sand filter system.
PRECAST SOLUTION
Oldcastle Infrastructure supplied the stormwater detention and sand filter system at the new development by incorporating a StormCapture® modular precast concrete vault system.
Osborn incorporated the sand filter and detention chamber into a single stormwater management system using 27 StormCapture modules. The system, installed under the driveway between two rows of townhomes, includes 19 retention modules, six sand filter chambers and two pre-treatment sedimentation modules.
The pre-treatment chambers trap sediment and floatables, while the sand filter uses sand media to filter smaller particles and other pollutants. The detention chamber stores runoff while allowing sufficient time for treatment through the sand filter. Discharge from the system is controlled by an orifice plate at the outlet pipe. The system is designed to meet AASHTO HS-20-44 for traffic loads and has multiple manholes for future maintenance access.
The stormwater management system receives water from onsite storm drains and downspout collection pipes, as well as from a grate directly over the top of one of the pre-treatment modules. Runoff then passes through the StormCapture system and then out to the storm drains.
“The success of this job was due to the pre-construction meetings held by Scott Bovit (Owner) of Siteworks and his team. The owner and engineer were delighted to see the ease of the install and praised the quality of the material supplied”. Scott Polk, Oldcastle Infrastructure
PROJECT DETAILS
Infrastructure Detention and Sand Filter Infrastructure Management System
Oldcastle Infrastructure Product:
- 19 – 5’ tall StormCapture retention modules
- 6 – 9’ tall StormCapture sand filter chambers
- 2 – 9’ tall StormCapture sedimentation modules
DAY 1
The base sections of the sand filter, detention and pre-treatment modules were installed.
DAY 2
The modular nature of the StormCapture system provided the contractor with an opportunity to install all of the internal sand filter components (under drain piping, stone and sand media) very easily while the system was still open.
DAY 3
The tops of the modules were installed and backfilling operations were completed.