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historicalmarkerproject/markers/HM1LPE_lock-ridge-iron-furnace_Alburtis-PA.html
Representative of the many iron furnaces in the Lehigh Valley, Lock Ridge was constructed here in 1868, operated until 1921, and was the last furnace in the US to solely use anthracite coal as fuel. By the late 19th century the Lehigh Valley was t…
historicalmarkerproject/markers/HM1LPB_from-production-to-preservation_Alburtis-PA.html
After the last castAfter Lock Ridge's last cast in 1921, the company shuttered the complex, and it sat abandoned for many years. Historic preservation was not yet a major concern, and few people thought of the complex as a place worthy of protecti…
historicalmarkerproject/markers/HM1LP8_lock-ridge-furnace_Alburtis-PA.html
From charcoal to "stone coal"During the late eighteenth and early nineteenth centuries, the Lehigh Valley, with its wealth of trees for charcoal fuel and substantial sources of ore, attracted many enterprising iron facilities to settle i…