Seawall Contractor

Trusted Seawall Contractor for Waterfront Stability

GeoStabilization International is the seawall contractor of choice for stabilizing aging bulkheads, waterfront retaining walls, and quay structures from the landside. For more than 20 years, our teams have delivered stabilization solutions that protect property and infrastructure while keeping schedules and budgets on track. Using tiebacks, anchors, soil nails, and targeted grouting, we restore capacity, control seepage, and extend service life with minimal disturbance to sensitive coastal environments.

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Bluff stabilization
Technician installing stabilization materials on a steep bluff.

Why Choose GSI as Your Seawall Contractor

  • Low-Impact Landside Access – Compact drills and rope-access crews work from upland zones or directly from the wall top, minimizing excavation and avoiding in-water construction.
  • Rapid Mobilization – Our nationwide coverage ensures quick response after storms, high-water events, or settlement issues.
  • Innovative Technologies – Launched soil nails and SuperNail™ systems enable fast, top-down stabilization in tight access areas and corrosive marine conditions.
  • Cost and Schedule Certainty – Value-engineered designs reduce change orders, minimize closures, and often eliminate the need for full wall replacement.
  • Safety and Quality – Waterfront protocols, work-at-height programs, testing, and detailed documentation meet or exceed industry standards.

Our Capabilities

As a trusted seawall contractor, GSI provides a complete range of landside stabilization and backfill improvement services:

Soil nailing with steel or fiberglass to strengthen backfill and resist overturning and sliding.

Tiebacks, rock anchors, and helical anchors to restore wall capacity and control deflection.

Void fill, compaction, and curtain grouting to seal leaks, densify soils, and reduce seepage.

Weeps, subdrains, and perforated elements that relieve hydrostatic pressure behind walls.

Geotextiles and membranes that stabilize and filter saturated backfill.

Specialized equipment for narrow boardwalks, upland benches, and other restricted areas.

Rapid stabilization following storm damage, scour, or sinkholes.

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How GSI Stabilizes and Repairs Seawalls

  • Assessment and Monitoring – Survey wall movement, identify cracking, rotation, or seepage, and evaluate groundwater influences.
  • Engineering and Design – Determine anchor layouts, select corrosion-resistant materials, and define drainage and grouting systems.
  • Top-Down Installation – Install tiebacks, anchors, and soil nails from the surface, followed by pressure grouting and capacity testing.
  • Seepage Control and Backfill Improvement – Seal voids and leaks through grouting, then install drainage to relieve pressure.
  • Finish and Protection – Restore surfaces, apply geosynthetics where required, and provide maintenance guidance for long-term performance.
Coastal stabilization

The GSI Advantage

 

Corrosion-Resistant Systems: Long-lasting capacity in coastal and chloride-rich environments.

Minimal Disruption: Landside, top-down construction reduces permitting and avoids marine impacts.

Proven Performance: Thousands of successful stabilization projects across North America.

Integrated Delivery: Design-build approach ensures schedule control and predictable results.

Client Reviews

Landslide Repair for Infrastructure in California

“I would like to thank you and the county for repairing the road slide on Dunne avenue. The repair is excellent and the contractors were very efficient and skilled. You personally did a great job of providing information about the status of the project. My family appreciates your efforts.”

Geohazard Mitigation for Transportation in the Mid-Atlantic

Hey Jennifer,

I just wanted to say how much I enjoyed working with you guys on [our project]. Under the circumstances with that big of a job, and traffic volume that was being detoured it was a little stressful, however you all were so easy to work with, it made my job easier! Just wanted to thank you and Ryan for keeping me informed weekly and sometimes daily. Sara did an amazing job with the drill pattern and the engineering side of things. Kyle is one of the best superintendents I have worked with, he is good to his guys and got a lot of work done due to his ability to plan ahead and coordinate. Great experience for me and I really enjoyed working with you all, looking forward to our next job sometime. Please let everyone on the crew know that I really appreciate all their hard work, pleasure meeting everyone!

THANK YOU!”

Safety-Focused Transportation Project Support in South Carolina

As told by GSI Project Development Engineer: We had a site walk today with the gang from the SCDOT district as well as the statewide construction engineering group. They had good things to say about the professionalism and intelligence of our crew. In particular, one of the construction engineers pointed out that in all his years of working on projects, ours was the best and most thorough safety meeting he had attended.

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Need to stabilize or repair a seawall? GSI’s geotechnical teams deliver durable, corrosion-resistant solutions designed for long-term performance.

Request a seawall assessment or proposal today.

855.579.0536

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