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Pat Milliken Ford Dealership

Redford, Michigan

Owner:

Pat Milliken Ford Dealership

Engineer:

GLA Surveyor & Engineer’s 

Contractor:

Lake Michigan Excavating

Installation:

June 2018

Technical Description:

  • 5,297 LF of 60"  Aluminized Steel Type 2
  • Vortechs® Hydrodynamic Separator

The Pat Milliken Ford Dealership had outgrown its property and needed more space, so they expanded onto a former church property adjacent to their site.

Local stormwater regulations called for water quantity and quality control. To meet the quantity requirements, engineers specified an underground detention system made from 5,297 LF of 60” diameter Aluminized Steel Type 2 that provides over 100,000 CF of storage. To meet the quality requirements, a Vortechs hydrodynamic separator was specified.

The site consisted of sand materials over impervious tight clay with no opportunity to infiltration into the subgrade. The use of solid Corrugated Metal Pipe (CMP) allowed flexibility in using some of the suitable on-site backfill materials, which provided significant cost savings over importing expensive aggregate from off the site. 

Contech provided design details, structural calculations, and installation estimates to help the engineer prepare accurate plans and specifications used in the design and approval phase with regulatory agencies. Contech also assisted with coordinating the material delivery with the contractor to allow for staged construction and ongoing operation of the facility.

Contech reduced the cost of the system to meet financial requirements, provided a reliable system with ease of installation, and supported the contractors throughout the entire installation process.

“We are pleased with the effort that Contech provided with the design and support during installation,” said Scott Schumacher, Director of Engineering, GLA Surveyors and Engineers. “The project was successful from a schedule and overall budget aspect. We appreciate the efforts that Contech had with this project.”

Technical Description:

  • 5,297 LF of 60"  Aluminized Steel Type 2
  • Vortechs® Hydrodynamic Separator

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