Dean Abbondanza is Director of Engineering and Business Development at JD Fields & Company, Inc. With a background in civil engineering and more than 30 years of experience in engineering sales and technical marketing, Dean has built a recognised reputation in the deep foundation industry. He is a published contributor to numerous trade publications, an active member of the American Society of Civil Engineers (ASCE), the Geo-Institute, Deep Foundations Institute (DFI), Pile Driving Contractors Association (PDCA), and American Association of Port Authorities (AAPA), and the inventor of the patented HMZZ hybrid wall system.
In this expert Q&A, Dean shares his insights on how steel geostructural systems—including sheet piling and deep foundation solutions—play a critical role in modern flood mitigation strategies, especially across the North American market.
Could you start by explaining how sea level rise is driving demand for new infrastructure solutions?
Around the world—and particularly along the U.S. coastline—we’re witnessing a continuous rise in sea levels. What’s surprising is that roughly 43% of this increase is caused by thermal expansion, where warming ocean temperatures cause water to expand. Combined with stronger storms, this trend is putting serious strain on ageing and underprepared infrastructure. It’s a global challenge affecting billions, not just coastal communities.
In the U.S., which areas are most at risk?
The Texas Gulf Coast and Mid-Atlantic region are two of the most vulnerable areas. These zones are home to vital energy and civil infrastructure. Agencies such as the U.S. Army Corps of Engineers forecast the need for tens of billions in investment for coastal resilience projects. This isn’t a distant problem; it’s already impacting infrastructure today, making both upland and coastal mitigation strategies essential.
Could you elaborate on the distinction between upland and coastal flood mitigation strategies?
Certainly. Upland flood mitigation involves protecting inland areas through systems like levees and canals. Coastal mitigation, on the other hand, is focused on managing storm surge and preventing shoreline erosion. While both areas require tailored approaches, they share one core requirement: durable, long-term solutions that can withstand increasing climate volatility.
How can steel geostructural solutions help address these issues?
Steel sheet piling is essential in flood mitigation. Unlike traditional structural steel, it functions as a geostructural element, working with soil to resist loads and stabilise foundations. It can support levee walls, prevent embankment failure, and raise flood defences to new standards. After Hurricane Katrina, U.S. design codes changed—calling for deeper piles and additional reinforcement. These updates have been instrumental in protecting vulnerable infrastructure.
What about shoreline protection—how effective is steel there?
Steel is highly effective in coastal defence. We’ve seen it used in structures like groynes and jetties to prevent erosion. A notable example is Casey Key, Florida, where three property owners installed 762 feet of steel sheet piling to protect their homes. When Hurricanes Ian, Helene, and Milton struck, the wall held firm. Protecting the foundation made all the difference—sand and debris can be cleared, but once the foundation is compromised, the building is at serious risk.
Noise and vibration during installation are often concerns. How are these managed?
Great question. Traditional methods like diesel or vibratory hammers can create significant noise and vibration, potentially damaging nearby structures and disturbing sensitive environments. On the Casey Key project, local regulations and turtle nesting considerations called for a quieter alternative. The contractor used a hydraulic press-in method—also known as a silent piler—which enabled steel pile installation with no noise or vibration. It’s both environmentally and structurally sound.
What should engineers and planners keep in mind when considering steel pile foundations?
Steel pile foundations should not be overlooked. While our segment may use less steel by volume than some others, our impact is significant. Steel sheet piling offers flexibility, durability, and reliable performance under harsh conditions. With more frequent and severe storms, incorporating steel geostructural elements into flood protection planning is not just smart—it’s essential.
Conclusion
As climate threats grow, the need for resilient, adaptable infrastructure becomes increasingly urgent. Steel geostructural systems—such as sheet piling, H-piles, and hybrid wall designs—provide proven protection for public infrastructure and private developments alike. As Dean Abbondanza’s expertise illustrates, these systems are vital in safeguarding foundations and preserving structural integrity, especially in flood-prone and coastal environments.
By adopting steel solutions early in the design process, engineers and planners can build stronger, safer, and more sustainable defences against rising sea levels and extreme weather events.