Towering Relics of Innovation: The Coplay Cement Kilns

In the heart of the Lehigh Valley, the world’s only remaining continuous-firing vertical cement kilns stand tall as a reminder of the region’s rich industrial past. This site is a hidden gem for history enthusiasts, photographers, and travelers looking to experience a unique slice of America’s industrial legacy.

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Address: 245 N 2nd St, Coplay, PA 18037

Category: Weird History

Duration: 30 mins

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Location

The Coplay Cement Kilns are located at Saylor Park, 245 N 2nd St, Coplay, PA 18037. The park is open year-round from dawn to dusk, and there’s no admission fee. The walking paths are well-maintained, making the site accessible to visitors of all ages. Remember to always use caution during inclement weather.

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Rising through History

The banks of the Lehigh River have a rich place in industrial history. Just south sits the old Bethlehem Steel factory, which you can also visit today. In 1866, David Saylor began experimenting with how to produce Portland cement. He discovered that the area had the perfect limestone to produce the material. Saylor’s Cement Company began producing his patented Portland cement in 1875. Cement mills began springing up throughout the area heading into the end of the century, but Saylor’s Portland cement set the standard. By 1907, the area was producing 70% of the Portland cement used in America.

Two important innovations came from here. The refinement of Portland cement into a stronger material, and the horizontal rotary cement kiln. The kilns you see today were erected in 1892, but were shut down in 1904 after innovations made them obsolete.

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Walking Through Saylor Park

The nine cylindrical structures stand in perfect alignment, their weathered facades telling stories of a bygone industrial era. The site features interpretive signage around the structure that details the history of Portland cement production and David Saylor.

The area makes for a short walk around the kilns, or a longer walk along the Ironton Rail-Trail. The Rail-Trail passes through the boroughs of Coplay, Whitehall, and North Whitehall. The trail consists of nearly 10 miles of paved trail, including a 5.5-mile loop around Coplay, Pa.

The kilns were originally housed in a building protecting them from the elements. The kilns were slated to be torn down in 1951, but were instead saved and shortened by 40 feet for safety. In 1976, Lehigh County created Saylor Park to preserve the region’s ties to its rich history.

Whether you’re a history buff, a photographer, or simply someone looking for an off-the-beaten-path adventure, the Coplay Cement Kilns promise a visit that’s both educational and inspiring.

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