Gulf Coast Underground

Gulf Coast Underground, LLC (GCU) is a full-service general construction and engineering firm focused on wastewater collection systems and treatment facilities. Established in 2003, the company serves public and private clients across the southeastern United States and other locations, including Puerto Rico and the U.S. Virgin Islands. GCU combines infrastructure evaluation with design-build construction, offering practical, long-term solutions intended to save clients time and cost while supporting environmental sustainability.

Its services cover sewer system assessment, rehabilitation, and replacement. GCU performs CCTV inspections and cleaning, flow monitoring, manhole inspections, smoke testing, and sewer system evaluation surveys to identify defects, leaks, and infiltration. Rehabilitation capabilities include lateral and main grouting; manhole and wet-well lining and restoration; trenchless pipe bursting and pressure-pipe rehabilitation; shotcrete and protective coatings; and structural liners for mains and laterals, including cured-in-place pipe and fold-and-form PVC. The company also provides engineering and design-build services for complex infrastructure projects. With in-house design-build capabilities and licensed professionals across multiple states, GCU positions itself as a collaborative technical resource for extending the life and improving the performance of essential water infrastructure.