CASE STUDY
Wooden Bulkhead Replacement with Helical Piles at Prosperity Pointe
Seawall Savers™ | Punta Gorda, FL – January 13, 2023
Overview: Secure Infrastructure on Charlotte Harbor
Located in the scenic Charlotte Harbor area of Punta Gorda, Florida, Burnt Store Marina is a luxurious waterfront sanctuary featuring private villas and condominiums—including the exclusive Prosperity Pointe development. A community swimming pool on a private island is connected by a pedestrian bridge and supported by a 25yearold wooden bulkhead that had begun to fail, threatening safety and structural stability.
Seawall Savers™ was engaged to deliver a durable, modern seawall solution that ensured long-term reliability for residents while preserving the aesthetic integrity of the marina environment.
Key Project Challenges
The Prosperity Pointe bulkhead replacement presented unique obstacles that required innovative engineering:
▲ Limited Construction Access: Surrounded by buildings, the site allowed minimal space for equipment staging and material delivery.
▲ Complex Subsurface Conditions: Dense soil layers, buried concrete remnants, sub-surface rock, hidden utility lines, and unknown debris complicated excavation and foundation work.
▲ Logistical Difficulties: A 100-ton crane and barge setup were needed to transport materials across the water to the island—adding operational complexity.
Strategic Solution: Helical Tie-Back Anchors
After evaluating backup options—timber piles, micro piles, concrete pre-stresses—Seawall Savers™ selected helical piles as the most efficient and sustainable choice:
▲ Access-Friendly: Compact equipment and modular design suited tight construction zones.
▲ Low-Impact Installation: Minimal vibration and noise—ideal for a residential, waterfront community.
▲ Cost-Efficient & Durable: A long-term solution balancing quality and budget.
▲ Environmentally Sensitive: Minimal soil disturbance, preserving the surrounding landscape and waterway.
Technical Specs & Design Details
Partnering with Rube Clausen Consulting and ECP Helical Foundations Systems, the team designed:
▲ 1½″ squareshaft helical piles, each with triple-helix lead sections (8″/10″/12″) capable of handling dynamic load demands of the new Trueline vinyl seawall.
These anchors ensured sufficient holding power for lateral and tensile forces exerted on the island pool’s retaining structure.
Installation Process: Precision & Care
Preparation & Mobilization
▲ Partial dismantling of pedestrian bridge sections enabled barge access to the island.
▲ Nearby utility lines were relocated to eliminate obstruction and risk—paving the way for safe pile placement.
Helical Pile Installation
Using a Caterpillar 311 excavator with a 10K ProDig hydraulic drive, Seawall Savers™ installed:
▲ 78 helical tie-back anchors, driven to depths between 15–21 feet to achieve required load thresholds.
▲ Each pile was tested and monitored using a Digital Torque Indicator, capped with a galvanized 7″ x 7″ termination to secure the seawall structure.
Quality Control & Monitoring
▲ A full-time Quality Control Officer ensured seamless execution throughout.
▲ Socotec Engineering conducted pile certification.
▲ Load-bearing capacity of each pile (36 KPS) was verified to meet engineering standards.
Project Team & Key Collaborators
- Geotechnical Engineer: Socotec Engineering
- Structural Engineer: Rube Clausen Consulting
- Piling Monitor: Forge Engineering
- Certified Installer: Seawall Savers™
Each partner played a crucial role in achieving precision, safety, and compliance.
Key Project Advantages
▲ Efficient Use of Tight Space: Helical piles enabled installation in limited-access zones without heavy machinery.
▲ Specialized Hydraulic Equipment: Ensured accurate placement and consistent torque control, crucial for structural safety.
▲ Environmental Preservation: No excavation or soil removal—keeping the lake and landscape pristine.
▲ Load Testing and Safety Assurance: Torque monitoring and validation provided peace of mind.
▲ Long-Term Stability: Embedded into fractured limestone, the piles offer a lifetime foundation.
▲ Minimal Disruption: Quiet installation preserved the residents’ peace and day-to-day experience.
Conclusion: Engineering Meets Coastal Innovation
The success of the Prosperity Pointe bulkhead project exemplifies how Seawall Savers™ solves complex marine infrastructural challenges with advanced, respectful engineering. The use of helical tie-back anchors provided a practical, low-impact, high-durability solution, bolstering safety and functionality for years to come.
Seawall Savers™ continues to uphold its reputation as a marine industry leader—combining technical excellence with environmental care.
Homeowners Question:
I’m a homeowner at Prosperity Pointe—what exactly are helical tieback anchors, and how do they help stabilize our seawall?
— A. Delaney, Unit Owner, Prosperity Pointe Condominium Association
Excellent question, Helical tieback anchors are deep foundation elements that are “screwed” into stable soil layers behind the seawall to help resist pressure from water and soil pushing against the wall. Think of them like reinforcements that hold the seawall in place from the backside. At Prosperity Pointe, where water levels and soil conditions vary, these anchors provide critical lateral support—preventing the wall from bowing, tilting, or shifting during storms or hurricanes. They’re a long-term, non-invasive solution that adds decades of structural stability.
Frequently Asked Questions (FAQs)
They offer soil anchoring without excavation, ideal for restricted-access sites like Privatized Island pools.
Installation causes minimal disturbance and leaves the surrounding area and marine ecosystem intact.
It validates each pile’s load-bearing capacity, guaranteeing safety and structural performance.
With periodic inspections, it should remain structurally sound for decades—requiring minimal upkeep.
No—the deeply embedded helical piles are unaffected by waves, storms, or high tides.
About the Author
Charlie Garcia
Florida-Certified Building Contractor & Marine Construction Specialist, Seawall Savers™
With over 25 years of experience in seawall and marine foundation engineering, Charlie Garcia is an industry leader sought for technical innovation and environmental integrity. Holding dual contractor licenses (#CBC1252534, #CBC1263386), Charlie is also certified in Helical Piling Inspection, Deep Foundation Contractors, and Foam Injection systems. His leadership ensures every Seawall Savers™ project delivers lasting impact with thoughtful precision.