Kuhnsville, PA, United States
Portland Cement. This industry was born in the Lehigh Valley. David O. Saylor first made portland cement at Coplay in 1871. Here also was the first use of the rotary kiln process commercially Nov. 8, 1889. This region has continued to lead in the industry.
Listen to the audio guide for Blue plaque № 29156 Free on WIP — starts by itself when you arrive, even with the screen off