First Cement
Whitehall, Lehigh County, Pennsylvania
Marker Inscription
David O. Saylor was the first to make portland cement in the United States, at Coplay in 1871. First use of the rotary kiln to manufacture cement on a commercial scale also was here Nov. 8, 1889.
Erected by Pennsylvania Historical and Museum Commission
The Story
At Coplay in 1871, David O. Saylor produced the first portland cement made in the United States, freeing American builders from reliance on imported European product. Less than two decades later, in November 1889, the same locale saw the first commercial use of the rotary kiln — a breakthrough that let cement be manufactured continuously and at scale. These innovations turned the Lehigh Valley into the heart of the young nation's cement industry.
Why it matters
The birth of American portland cement here supplied the essential material for the roads, bridges, and skyscrapers that would define the nation's modern built landscape.
The story behind this marker
AI contextThe era
The decades after the Civil War were an age of iron nerve and raw ambition in American industry. Railroads stitched the continent together, cities reached upward, and inventors and manufacturers raced to supply the materials a booming nation demanded. In the Lehigh Valley of Pennsylvania, rich in limestone and threaded with rail and water routes, the raw ingredients of a new industry lay waiting.
One of those ingredients was cement — specifically portland cement, the strong, reliable binder that had been developed in Europe and, for years, largely imported from across the Atlantic at considerable cost. American builders wanted it; American ground could supply it; what was missing was someone to prove it could be made here at scale.
The valley around Coplay, with its abundant limestone and industrial energy, turned out to be exactly the place where that gap would be closed. What happened here in the 1870s and 1880s would help shift American construction from a dependent buyer into a world producer.
People & events
The central figure is David O. Saylor, the man credited with being the first to manufacture portland cement in the United States, achieving it at Coplay in 1871. It was a genuine breakthrough — replacing an expensive imported product with one made from local stone by local hands, and giving American builders a homegrown source for the strongest binder then available.
But the story did not stop with that first batch. Less than two decades later, on November 8, 1889, this same locality saw the first commercial use of the rotary kiln to make cement. Where earlier methods worked in slow, stop-and-start batches, the rotary kiln allowed a continuous flow of material through a long, turning, heated cylinder.
That shift — from batch to continuous production — is the kind of quiet engineering leap that changes an entire industry. It meant cement could be made faster, more uniformly, and in far greater quantity, transforming a promising local venture into the foundation of a national industry.
Its place in the American story
It is hard to overstate what cement made possible. The modern American landscape — its highways and sidewalks, its bridges, dams, foundations, and rising skylines — rests quite literally on concrete, and concrete depends on cement. By proving portland cement could be made in America, and then made continuously and cheaply, the innovations here helped supply the material backbone of the country's growth.
The achievements at Coplay turned the Lehigh Valley into the heartland of the young American cement industry, a role it would hold for generations. When the nation poured its infrastructure in the decades that followed, much of the know-how — and much of the product — traced back to this ground.
This is a reminder that some of the most consequential American history is industrial rather than political. No speeches were made here, but the work done in these kilns helped build the physical country that everything else stands on.
If you visit
This is a landscape to read with an engineer's eye. The Lehigh Valley's limestone hills aren't just scenery — they're the raw material that made this industry possible, and knowing that changes how the whole region looks.
Stand here and think about the leap from batch to continuous production. It sounds technical, but it's the difference between making something by the potful and making it by the riverful. That change, first proven commercially right here, is why cement went from costly novelty to the cheap, universal material beneath your feet.
For a road trip, this marker pairs beautifully with the valley's broader industrial heritage — its ironworks, mills, and manufacturing towns. Let it turn an ordinary sidewalk or bridge you cross later that day into something you notice: a direct descendant of the work begun in these Pennsylvania kilns.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
Own a business near here? Add it to the map.
Related people
- · David O. Saylor
Related events
- · First U.S. portland cement, 1871
- · First commercial rotary kiln, 1889
Themes & tags
Nearby & related markers
David Thomas
Catasauqua, PA · est. 2001
David Thomas carried a hard-won secret across the Atlantic from Wales: how to smelt iron using abundant, slow-burning anthracite coal rather than scarce charcoal. Settling in the Lehigh Valley, he built the Crane Iron Works, widely credited as the first anthracite iron furnace to succeed both technically and as a business. His breakthrough transformed eastern Pennsylvania's hard-coal region into an industrial powerhouse and earned him the title "father of the American anthracite iron industry."
Crane Iron Works
Catasauqua, PA · est. 1997
On the Fourth of July, 1840, Welsh ironmaster David Thomas fired up a furnace in Catasauqua that finally proved anthracite coal could smelt iron on a commercial scale. Earlier attempts had failed, but Thomas's hot-blast furnace for the Lehigh Crane Iron Company soon turned out 50 to 60 tons of pig iron a week, and the works grew to six furnaces before closing in 1930. The success helped shift American iron production away from charcoal and toward the hard coal of Pennsylvania's mountains.
Davies and Thomas Company
Catasauqua, PA · est. 2023
Founded in the iron-rich Lehigh Valley in 1865, the Davies and Thomas Company mastered a demanding new craft: casting the heavy iron plates that line tunnels bored beneath rivers and cities. Its segments went into landmark works of American infrastructure—the Holland and Lincoln tunnels and railroad bores—as well as projects overseas. A sample of its tunnel lining was proudly displayed at the 1904 St. Louis World's Fair.
Old Waterworks
Bethlehem, PA · est. 1953
As early as 1754 the Moravians of Bethlehem engineered one of colonial America's earliest municipal water systems, pumping spring water uphill to a tower and letting gravity feed it to a network of cisterns. The pipes were bored from hollowed tree trunks, a practical marvel of frontier ingenuity that delivered running water to the community decades before most American towns had anything like it. The original engine house still stands nearby as a reminder of this early feat of engineering.