Cultec Stormwater System Helps Solve On-Site Challenges for Retail Redevelopment


BROOKFIELD, CT - When a new CVS/pharmacy® store was slated to come to Highland Plaza in Holbrook, Mass., the development site required a number of design changes and upgrades.

Three firms came on board to bring the improvement ideas to life. Reeves Design Associates was responsible for the site architecture; BKA Architects, Inc. designed the CVS/pharmacy; and R J O'Connell & Associates, Inc. took charge of the engineering aspect of the redevelopment.

The Plaza was comprised of approximately 42,500 square feet of retail and restaurant space. According to Philip Henry, P.E., Project Manager with R J O'Connell & Associates, the renovation project included construction of a standalone 13,500-square-foot CVS/pharmacy with a double full-service drive-thru; relocating the existing Family Dollar store from the north end of the Plaza to the south end; demolishing approximately 9,600 square feet of building; and implementing façade improvements to the existing structures. The front parking lot had to be re-graded and re-striped. Additionally, landscaping and other aesthetic improvements were installed to revitalize the Plaza.

Stormwater upgrades to the entire site were a key part of the project. An existing stormwater system, which consisted of catch basins and pipe, connected to the Massachusetts Highway Department (MassHighway) drainage system running along Route 37. The connecting drain pipe was built circa 1960, and the site drained its runoff into the state system for about 50 years. However, MassHighway mandated that the pipe be disconnected, in accordance with its 2006 Directive. As a result, the Plaza's stormwater runoff was re-routed to an upgraded 24-inch HDPE pipe running down West Division Street.

In addition to replacing the connecting pipe, the R J O'Connell & Associates engineers had to provide 6,177 cubic feet of detention storage for the 4.4-acre site. In cases where all the stormwater needs to be kept onsite and the development area needs to be maximized, the engineers have traditionally used subsurface chamber systems provided by CULTEC, Inc. This time, the engineers selected the low-profile Recharger® 150 HD unit from a variety of available chamber sizes.

"The Recharger 150 helped us to accommodate the shallow groundwater at 5-7 feet below the finished grade," said Henry.

The system captures runoff via the outlet control structure manhole containing an 8-inch orifice at elevation of 213.75 and a weir elevation of 215.50 and detains it in about 150 chamber units.

The detention system was installed in 10 beds, which occupied about 6,200 square foot of underground area, leaving the above-ground surface for parking. CULTEC employs its own in-line side portal manifold eliminating the need for a costly external pipe header. The manifold also makes the system's installation easier than that of a conventional manifold system. Additionally, CULTEC's systems use less stone than other comparable systems on the market and require no heavy installation equipment. At Highland Plaza, excavation, installation and backfilling took about a week, making for a speedy completion of the site's drainage system.

For more information, please call (203) 775-4416 or visit www.cultec.com.

About R J O'Connell & Associates, Inc.

Founded in 2004, R J O'Connell & Associates, Inc. (www.rjoconnell.com) provides civil engineering, land planning and land surveying services. In 2009, it was featured as one of the fastest growing architecture, engineering and environmental consulting firms in the United States on the "Hot Firms 200" list issued by "The Zweig Letter."

About CULTEC

In 1986, CULTEC introduced its Contactor® and Recharger® HDPE septic and stormwater chambers and helped begin a revolution toward the use of plastic construction products. Since then, several product developments and strategic alliances have made CULTEC a cutting-edge R&D-based manufacturer. CULTEC chambers can be used as subsurface retention or detention systems and as replacements for ponds, concrete structures or pipe and stone installations.

CULTEC manufactures nine different chamber sizes ranging from 8.5" - 32" to accommodate almost any site parameter. The chambers' perforated sidewalls and fully open bottoms promote maximum infiltration capability and allow for the transfer of high volumes of water at a low velocity. The units can be installed singularly or in series in single- or multi-layer beds.

In addition, CULTEC developed its own in-line side portal manifold system, which eliminates the need for a conventional pipe header system, and water quality unit for maintaining CULTEC chamber systems. CULTEC products meet H-25 wheel load requirements, have a 10-year warranty and are currently modeled in HydroCAD, Bentley Systems, Inc.'s PondPack®, Autodesk, Inc.'s Storm and Sanitary Analysis, and Streamline Technologies' ICPR.

CULTEC's technical staff offers free design assistance including preliminary calculations and job-specific CAD details. A free CULTEC StormGenie(TM) - AutoCAD® Plug-In for designing CULTEC systems and a free HydroCAD CULTEC custom edition is also available from the company. In addition, CULTEC products can contribute to the U.S. Green Building Council's credits, under the LEED rating system, when the project is designed per LEED requirements.

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