"Pownall"
Truline Hybrid Seawall & Multi-Level Dock System
Location: Boca Raton, FL
About this project
The Pownall Project involved the complete replacement of an aging waterfront seawall system on a future-development property located along the Intracoastal Waterway in Boca Raton, Florida. After purchasing the neighboring lot and demolishing the existing structure, the owner identified severe seawall deterioration that needed to be addressed prior to new construction.
Due to Boca Raton municipal requirements, the existing seawall had to be fully removed before installation of the new system could begin. This process presents construction challenges, particularly protecting adjacent properties from erosion and soil movement during demolition. To stabilize the site, APH Marine Construction installed temporary sheet piling and underpinning anchor systems between neighboring properties, successfully securing the surrounding structures throughout the removal and reconstruction process.
During excavation, extensive buried construction debris was discovered as deep as six feet below the mudline, significantly increasing removal efforts before new construction could proceed. Once the site was cleared, Truline panels were driven to a rock layer located approximately 8 to 10 feet below the mudline. MST GFRP fiberglass rebar was then drilled and pinned directly into the rock substrate, creating a sealed and structurally reinforced hybrid seawall system engineered for long-term shoreline protection.
A major advantage of the hybrid batter piling design utilized on this project is the elimination of traditional landward tieback systems or deadman anchors. On future-build waterfront lots, this allows property owners and general contractors to maximize usable land area for future foundations, pools, utilities, and landscaping without interference from buried anchoring systems.
The project also included construction of a multi-level concrete dock built to the maximum dimensions permitted by the City of Boca Raton. Both the seawall cap and dock structure were reinforced entirely with MST GFRP rebar, a non-corrosive fiberglass reinforcement system specifically selected for South Florida’s harsh saltwater environment. Unlike traditional steel reinforcement, GFRP will not rust, oxidize, or cause concrete spalling over time, significantly increasing the longevity and durability of the waterfront structure.
This project exemplifies intentional waterfront infrastructure designed not only to withstand today’s demanding marine conditions, but to support future waterfront development for decades to come.
Project Capabilities Highlighted
- Truline Hybrid Seawall Installation
- Hybrid Batter Piling Reinforcement
- Temporary Sheet Piling & Shoreline Stabilization
- Underpinning Anchor Systems
- Intracoastal Waterway Construction
- Existing Seawall Demolition & Debris Removal
- Rock-Pinned GFRP Reinforcement Installation
- Multi-Level Concrete Dock Construction
- MST GFRP Non-Corrosive Reinforced Concrete Systems
- Waterfront Infrastructure for Future Development
- High Wave & Wake Energy Mitigation
- Boca Raton Waterfront Permitting & Compliance
