Seawall Repair Mount Pleasant, SC

SC DHEC-OCRM critical-area permit + Charleston County. USACE Charleston District; SC DHEC Office of Ocean & Coastal Resource Management (OCRM). Under the SC Beachfront Management Act, new oceanfront seawalls are banned - work focuses on bulkheads, riprap and living shorelines on the Intracoastal and tidal creeks

We serve waterfront properties along Charleston Harbor, Shem Creek, the Wando River, and the Intracoastal. Service areas include Old Village, Shem Creek, I'On. Call 866-398-9323 to confirm service at your specific address.

Shem Creek and Wando River tidal current; aging marsh-front bulkheads.

Seawall repair in Mount Pleasant typically costs $225–$600 per linear foot. An 80-foot Charleston Harbor and the Intracoastal Waterway residential bulkhead runs $10,000–$32,000 for repair versus $35,000–$70,000 for full replacement. Call 866-398-9323 for a free on-site estimate.

The primary causes are Charleston Harbor tidal range of 5-6 feet — among the largest in the southeastern US — creating extreme cyclic loading on seawalls. Combined with Charleston County tidal marsh clay and sandy soils with active recreational and commercial boating on Shem Creek, these forces accelerate void formation, panel cracking, and joint separation. Charleston Harbor's 5-6 foot tidal range creates extreme cyclic seawall loading — South Carolina's seawall maintenance requirements are more demanding than Florida Gulf coast standards due to this exceptional tidal amplitude.

Most Mount Pleasant seawall repairs using polyurethane injection or helical tiebacks are completed in 1–2 days. We schedule work around low tide windows for maximum access and accuracy.

Structural repairs including tieback installation and cap replacement require Charleston County permits and may require DEP or Army Corps review for waterfront properties adjacent to Charleston Harbor and the Intracoastal Waterway. Polyurethane injection and maintenance repairs generally do not require permits. We handle all permitting coordination for major projects.

We recommend annual inspections for seawalls older than 20 years, plus inspection after every named storm event. Charleston Harbor's 5-6 foot tidal range creates extreme cyclic seawall loading — South Carolina's seawall maintenance requirements are more demanding than Florida Gulf coast standards due to this exceptional tidal amplitude. Early detection of voids and micro-cracks costs far less to address than waiting for visible structural failure.