• Ground Improvement
• Illinois DOT
• Hazelwood Schools
• Wentzville
• West Memphis
• St. Peters Rec Plex
• Sheboygan Police Station
• Lange-Stegman
• Kennett
• Bluffton Ethanol
• Wheeler Center
• Earth Retention
• Metrolink
• Warrenton Copper
• MoDot
• Centrum Properties
• Pinnacle Tunnel
• Metropolitan Sewer
• Drilled Shafts
• Hwy 40 Retrofit
• Pinnacle Casino
• Eads Bridge
• Driven Pile
• MCI WorldCom
• Ameren UE
• Augercast
• Proctor & Gamble
• Micropile
• Lenzburg Bridge
• St. Louis Zoo
• Cupples Station

Service: Earth Retention System
When Warrenton Copper, LLC decided to expand their copper casting operations, they realized this would require lowering the existing plant floor nearly 30 feet in one area. This required an earth retention system to be constructed inside the plant to allow the excavation to take place. In addition, one side of the “pit” consisted of an exterior wall of the plant at the top of the cut.

This wall acts as one side of support for a 10-ton overhead crane, which had to remain in service during the excavation. Subsurface Constructors was hired to design and build both the shoring system for the excavation, in addition to the underpinning system for the exterior wall.

• Owner: Warrenton Copper, LLC
• Structural Engineer: Wideman and Associates, Inc.
• Geotechnical Engineer: Shively Geotechnical, Inc.
• General Contractor: C. Rallo Contracting, Inc.
• Equipment: IMT AF-12, Bayshore Auger Rig