Design Build Solutions for Wastewater Collection Systems and Treatment Facilities

Gulf Coast Underground, LLC, is a full service general construction and engineering firm. One major component of our business is to investigate and evaluate the condition of municipal infrastructure, while another is to provide the latest technologies available to rehabilitate or replace the system. Our in house Design-Build capabilities truly set us apart from our competition. Since 2003, GCU has provided honest and dependable, long-term solutions across Florida, Alabama, Mississippi, Louisiana, Georgia, Tennessee, Texas, North Carolina, South Carolina, Virginia and Arkansas. From the outset, GCU was built upon relationships and our top priority has been and will continue to be to serve our clients with professionalism, provide them with cost and time saving solutions, and prove ourselves to be a trusted technical resource.


Our intent is for Gulf Coast Underground, LLC, to be recognized as the premier sewer infrastructure inspection and rehabilitation contractor in the Southeast. We aim to provide quality trenchless sewer rehabilitation using our innovative methods and performance driven teams to deliver upgraded infrastructure that our clients can trust.


Gulf Coast Underground, LLC, is not “just” a construction company. We are a dedicated team of individuals all working towards common goals, while understanding that the combined efforts of us all are greater than the sum of our individual efforts. Through honest business practices, continued education, and a commitment to providing our employees with all of the necessary tools to become masters of their craft; we will create a positive culture while making GCU an excellent place to build a career.

Featured Projects


Albany, GA

East Side/West Side Interceptor


International Paper

Pine Hill, Alabama


Hurricane Michael

Mexico Beach - Lynhaven, FL


DeFuniak Springs Wastewater System Improvements

DeFuniak Springs, FL



Sanitary Sewer Evaluation Surveys

GCU’s Engineering staff and fleet of equipment make us uniquely qualified to perform: flow monitoring, CCTV, Cleaning, MH inspections, Smoke Testing, etc.

Mainline and Lateral Line CIPP

GCU is equipped and capable of lining laterals with the industry leading LMK lateral lining system, as well as mainline storm and sanitary sewer ranging from 6” to 108” in diameter.

CIPP Wet-Out

GCU’s Theodore, AL location routinely wets out CIPP liner ranging from 6” to 60” in diameter.


From structural shotcrete reconstruction to mechanical and process design, GCU’s capabilities reach far and wide.


"I can say without hesitation that I would recommend Gulf Coast Underground’s Spectrashield system to anyone. From their technical support to their installation crews, the GCU team has transformed our thinking and understanding of concrete coating protection for existing and new structures. My clients value workmanship."

Chris Lacroix, PE
Manchac Consulting Group

“We have been doing business with Gulf Coast Underground for almost two years, and the coating system that you offer has reduced our infiltration by about 1.0 million gallons per day. Your company has always gone above and beyond to rehabilitate manholes that we though needed replacement”

Brian Purcell, PE
Gadsden, AL Water Works and Sewer Board

"GCU has been rehabilitating our sewer manholes with SpectraShield for many years now, and they have always done a very professional job. After trying numerous products (including cements and epoxies) to stop exfiltration at my headworks, nothing seemed to work. I gave GCU an opportunity and many years later things are still looking great. I knew that if it (SpectraShield) could handle the movement in the cast-in-place walls of my headworks, it would be able to handle the ground movement in a manhole and permanently seal out infiltration."

Rick Broussard
Minden, LA - Water/Wastewater Manager

Precision repairs bring first phase of Gonzales sewer system project $311,000 under budget -- READ MORE

The Advocate