Otten Contracting, Inc, 3536 State Route 4, Marissa, IL 62257, US

Subsurface Constructors is a full-service geotechnical contractor that specializes in foundation design and construction work. It also undertakes shoring and ground improvement projects. The firm s capabilities include vibro stone and concrete columns and dynamic compaction. Subsurface Constructors maintains a fleet of foundation drilling equipment, such as cranes, core drills, rock tools and drill rigs. It also has expertise in high-production rock excavation, slurry drilling and load testing. The company additionally designs and builds various earth retention systems. It is one of the leading installers of driven piles in the Midwest. Subsurface Constructors also owns and operates truck, all-terrain vehicle and skid-mounted test drilling equipment to verify geotechnical data.