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.
Location
AddressCoplay Rd., between Coplay Cement office bldg. and Saylor Park Dr., Coplay
CityCoplay
CountyLehigh
StatePennsylvania
Coordinates40.676170, -75.498000
Sources
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