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Shops at Broad

Mansfield , Texas


Kimley Horn 


Maverick Utility Construction


July 2018

Technical Description:

  • (9) CDS Hydrodynamic Separators
  • (4) StormGate Diversion Structures

The Shops at Broad is part of an 81-acre mixed-use development on the northeast corner of U.S. Highway 287 and Broad Street in Mansfield, Texas. The development is located next to StarCenter, an 80,000-square-foot facility that opened in 2017 with two ice rinks and event space.

A site of this size required a substantial stormwater management system to meet the City of Mansfield’s stormwater quality regulations that require the removal of total suspended solids from the first 1.5” runoff. 

To meet this requirement, engineers at Kimley Horn selected the CDS hydrodynamic separator. The CDS uses swirl concentration and continuous deflective separation to screen, separate, and trap trash, debris, sediment, and hydrocarbons from stormwater runoff. A total of nine CDS systems of various sizes were placed throughout the site, the largest being a twelve-foot diameter system.

Large peak flows and tight hydraulics required several of the systems be placed offline, so Contech also provided four StormGate bypass structures ranging from 8’x11’ to 9’x12’.

Contech Stormwater Design Engineers worked with Kimley Horne to properly size each of the CDS systems and bypass structures. In addition to the complex hydraulic, a site plan change after construction began caused a redesign of many of the units. The Contech design team expedited revised water quality & hydraulic calculations and updated details accordingly.

When it came time for installation, coordination between Contech and the subcontractor, Maverick Utility Construction, was key given the number and size of the CDS systems being installed. A Contech Project Coordinator managed all of the logistics, while a Contech Field representative was on-site to support Maverick Utility Construction ensuring a smooth installation. 

Technical Description:

  • (9) CDS Hydrodynamic Separators
  • (4) StormGate Diversion Structures

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