Great Lakes Dredge & Dock Corporation

What they make

1 input Great Lakes Dredge & Dock Corporation supplies

Click an input to see every good that depends on it, every country that produces it, and every other company in the supply chain.

Intelligence

What's known

Sourced claims about this company's role in supply chains, chokepoints, concentration, incidents, dual-use connections.

• Did you know2024

  GLDD's trailing suction hopper dredges — the same vessels that excavate and deepen commercial shipping channels to accommodate post-Panamax container ships — are also the primary machinery for the entire US beach replenishment program, which is the federal government's primary mechanism for managing coastal erosion and protecting beachfront communities. A GLDD hopper dredge is simultaneously a port infrastructure construction vessel and a climate adaptation tool: it pumps sand from offshore deposits onto eroding beaches to rebuild protective dune systems. After each Atlantic hurricane season, GLDD deploys these vessels to restore beaches in Florida, North Carolina, and New Jersey — beaches that protect billions of dollars of coastal real estate and tourist infrastructure. GLDD executes approximately 75-80% of all US Army Corps of Engineers beach nourishment contracts by value. The same physical vessel that deepens Charleston Harbor to allow 366-meter container ships to call is also the machine that pushes sand onto Miami Beach to protect condominiums from storm surge.

  Great Lakes Dredge & Dock Corporation ↗

• Concentration2024

  The US is currently executing the largest port deepening program since the Panama Canal expansion — Charleston deepened to 52 feet (completed 2022), Savannah at 47 feet (completed 2022), New York-New Jersey at 50 feet, Baltimore, and others — all driven by the need to accommodate the post-Panamax container ships that have dominated global container trade since the widened Panama Canal opened in 2016. GLDD is the primary contractor on most of these projects by default, as the Jones Act eliminates non-US competition. The strategic implication: the depth of US commercial ports is a function of one company's dredge fleet availability. If GLDD had a major fleet availability crisis (multiple vessel casualties, regulatory shutdown, financial distress), scheduled port deepening and maintenance dredging projects would queue with no alternative US contractor capable of handling the largest projects. The Army Corps of Engineers has no government-owned large dredge fleet as a backup; GLDD is the fleet.

  US Army Corps of Engineers ↗

• Origin2024

  Great Lakes Dredge & Dock Corporation was founded in 1890 in Chicago by William A. Smith to dredge the city's harbor and river channels. Over 134 years, the company has participated in virtually every major US harbor deepening and port expansion project: the Panama Canal approaches, the Houston Ship Channel, the Charleston deepening to 52 feet, and the Savannah deepening to 47 feet. Today, GLDD's unique position derives almost entirely from the Jones Act (Merchant Marine Act of 1920), which requires that vessels operating in US coastal trade and construction be US-built, US-flagged, and US-crewed. The world's largest dredging companies — Royal Boskalis (Netherlands), DEME (Belgium), and Jan De Nul (Belgium) — operate cutter suction dredges and trailing suction hopper dredges that are far larger and more capable than GLDD's fleet, but they cannot legally send those vessels into US harbor projects. GLDD's market position in US port infrastructure is not a competitive achievement; it is a legal monopoly created and maintained by a century-old maritime protection law that Congress has repeatedly declined to reform despite biennial studies showing it raises project costs by 15-30%.

  Great Lakes Dredge & Dock Corporation ↗