Coplay Cement Mill A, Lehigh County, PA, 1922.
flipFlip to Vertical portland cement kilns, Coplay Cement Company, North Main Street, Coplay, Lehigh County, PA, 1979.
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General view of the kilns and quarry.

Credit: Courtesy of the National Canal Museum

David O. Saylor's Coplay portland cement gained priceless nation-wide publicity and earned an award at Philadelphia's Centennial Exhibition in 1876. Among its many applications across the country, "Saylor's portland cement" was used to build Philadelphia's Girard Avenue and Callowhill street bridges.

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