Jacksonville Shipyards (WWII to Today) — Jacksonville, Florida

Jacksonville's position on the St. Johns River — a deep, navigable waterway that carries ocean-going vessels some 25 miles inland before reaching the downtown riverfront — made the city a natural site for shipbuilding from the earliest decades of American settlement. The industry that emerged along the Northbank and Southbank riverfront in the 1850s grew steadily through the early 20th century, reached a wartime peak of roughly 20,000 workers during World War II, remained the city's largest civilian employer as late as 1977, and finally closed permanently in 1992, as documented by Metro Jacksonville and The Jaxson Magazine. Three principal enterprises shaped this arc: Merrill-Stevens Engineering on the Northbank, Gibbs Gas Engine Company (later Gibbs Corporation) on the Southbank, and the wartime St. Johns River Shipbuilding Company, which together built hundreds of naval and merchant vessels ranging from Panama Canal construction barges to Liberty ships. The riverfront parcels once occupied by these yards have since been redeveloped into mixed-use districts, a hotel corridor, and the Southbank Riverwalk, embedding the industry's physical footprint — if not its machinery — in present-day Jacksonville.

Jacksonville's shipbuilding industry is traceable to the 1850s, when Jacob Brock established the city's first shipyard off Bay Street, operating initially as a blacksmith shop that evolved into a full repair and construction facility, according to the Shipbuilding History database. After Brock's death in 1877, the operation passed to Alonzo Stevens, and in 1887 James Eugene and Alexander Merrill joined Stevens to form Merrill-Stevens Engineering Co., incorporated that year. The company expanded significantly in the following decades, ultimately operating what The Jaxson Magazine describes as the largest dry dock on the East Coast between Newport News, Virginia, and New Orleans, Louisiana.

The scope of Merrill-Stevens's work extended well beyond the St. Johns River: the company's barges were employed in the construction of the Panama Canal, a fact documented by The Jaxson Magazine that illustrates the yard's capacity for large-scale marine engineering at the turn of the 20th century. By the early decades of the 1900s, Merrill-Stevens occupied a commanding position in southeastern U.S. shipbuilding, with repair and construction capability that attracted naval contracts as well as commercial commissions. The company's original Northbank site would later become the foundation on which the World War II shipbuilding partnership, the St. Johns River Shipbuilding Company, was erected.

A separate shipbuilding enterprise took root on the opposite bank of the St. Johns River in 1908, when George Williams Gibbs — a Georgia Tech graduate — founded Gibbs Gas Engine Company on reclaimed Southbank riverfront land, according to the Metro Jacksonville Archive. By the time the United States entered World War I, the Gibbs yard had built 16 submarine chasers for the U.S. Navy, establishing the company's capacity for military vessel construction well before the larger wartime mobilization of the 1940s.

During World War II, the Gibbs Southbank operation ran parallel to the Northbank Liberty ship program, producing sub chasers, minesweepers, covered lighters, tugboats, and sea skiffs for the U.S. Army, as documented by Jacksonville Today. In the postwar decades the company grew substantially; by the 1960s it was described as the largest shipbuilder in the South, per Metro Jacksonville Archive. In 1962, Bill Lovett acquired the company. The Gibbs yard's footprint eventually encompassed the Southbank riverfront between what is now the Main Street Bridge and the Southbank Hotel, per The Jaxson Magazine, a stretch of prime downtown riverfront that was later redeveloped into the hotel and office corridor that defines the Southbank today.

The World War II period represented the apex of Jacksonville's shipbuilding industry in both scale and national significance. In 1942, the St. Johns River Shipbuilding Company was established through a partnership involving Merrill-Stevens and a New York contracting firm, backed by $17 million in federal investment, according to the Museum of Florida History. The yard was sited on the Northbank Eastside, east of Hogans Creek, per Jacksonville Today.

The workforce expansion was rapid and dramatic. The Museum of Florida History documents the payroll growing from 258 employees at founding to a peak of approximately 20,000 workers by 1944, making St. Johns River Shipbuilding one of Florida's largest single industrial employers at any point in the 20th century. The yard operated six shipways and concentrated its output on Liberty ships — standardized cargo vessels that served, in the Museum of Florida History's description, as the workhorses of the Allied maritime fleet. Each vessel cost approximately $2.1 million to construct. Between 1942 and 1945, the yard produced 82 Liberty ships, as confirmed by the Jacksonville History Center.

Jacksonville's 82 ships were part of a national emergency shipbuilding program that ultimately produced 2,710 Liberty hulls across 18 cities, per the Jacksonville History Center. The program's first Jacksonville-built vessel was the Ponce de Leon. The Jacksonville Daily Record notes that of the entire national fleet of 2,710 Liberty ships, only three survive nationally, underscoring both the vessels' wartime expendability and the rarity of physical remnants from the program.

After World War II, the industrial complex on the Northbank continued as Jacksonville Shipyards, Inc. (JSI), which remained a major employer through the postwar decades even as the wartime workforce contracted sharply from its 1944 peak. By 1973, JSI employed approximately 2,500 workers, and as late as 1977 the company was still recognized as the city's largest civilian employer, according to Metro Jacksonville.

The 1980s brought sustained contraction. The yard cycled through closures and partial reopenings: Metro Jacksonville documents a closure in 1990 followed by a brief resumption of operations, before a final and permanent shutdown in 1991–1992. The dry docks — the physical infrastructure that had given the yard its capacity for large-vessel work — were sold to a shipyard in Bahrain, per The Jaxson Magazine, marking the dispersal of the yard's most durable assets out of the United States entirely. The Gibbs Southbank operation closed on a parallel timeline, leaving both major riverfront industrial sites vacant and available for redevelopment by the early 1990s.

The decline of JSI coincided with broader deindustrialization of American shipbuilding in the late Cold War period, as commercial ship construction shifted to Asian yards and naval repair work was consolidated at fewer government facilities. Jacksonville's military installations — particularly Naval Air Station Jacksonville and the Fleet Readiness Center Southeast — continued naval maintenance and repair functions that the private yards had once supplemented, but at a scale and focus distinct from the commercial and merchant shipbuilding that JSI had represented.

The parcels occupied by Jacksonville's historic shipyards are now occupied by mixed-use development, public recreational space, and institutional buildings. The former St. Johns River Shipbuilding Company site on the Northbank Eastside — where 82 Liberty ships were built between 1942 and 1945 — is now the location of The Shipyard, a mixed-use development in downtown Jacksonville, as reported by the Jacksonville Daily Record. The former Gibbs Corporation Southbank yard, which once extended along the riverfront between the Main Street Bridge and the Southbank Hotel, has been redeveloped into hotels, office buildings, and the Southbank Riverwalk — a public recreational corridor documented by The Jaxson Magazine as occupying former Gibbs and Jacksonville Shipyards property.

One structural artifact of the Merrill-Stevens era survived in institutional use: the former Merrill-Stevens Shipyard administration building was later repurposed as Bishop Kenny High School, per The Jaxson Magazine. Beyond this building, the physical infrastructure of the yards — dry docks, shipways, cranes — has not been preserved in place. The Northbank Eastside parcel has been associated in civic discourse with the phrase the Billion Dollar Mile, referring to the stretch of riverfront that includes the former shipyard site; as of the documentation available through Metro Jacksonville, the full development trajectory of this corridor remained the subject of ongoing planning discussions.

Institutional memory of Jacksonville's shipbuilding era is maintained by several organizations. The Jacksonville History Center holds archival records and educational materials specifically dedicated to the Liberty Ship program, including documentation of St. Johns River Shipbuilding Company's founding, output, and workforce. The Museum of Florida History in Tallahassee includes St. Johns River Shipbuilding Company and Naval Air Station Jacksonville in its permanent World War II exhibits, a designation that reflects the statewide historical significance assigned to Jacksonville's wartime industrial capacity.

The military infrastructure that grew alongside and partially supplanted the private yards remains active. Florida Trend documents Naval Air Station Jacksonville as employing approximately 12,000 military personnel and 7,000 civilian workers, with the Fleet Readiness Center Southeast functioning as the region's largest industrial employer. Naval Station Mayport, at the mouth of the St. Johns River on the Atlantic coast, employs approximately 13,000 military personnel. This naval presence is in part the institutional descendant of the wartime relationship between the federal government and Jacksonville's waterfront that the Liberty Ship program represented: $4.9 billion in direct annual defense spending and an estimated 124,000 regional defense-related jobs, per Florida Trend, now constitute the maritime and defense economy that private shipbuilding once anchored.