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Thropp Company Ashcom Quarry, South of U.S. Route 30 off State Route 1...
Significance: Developed in the early 1900s in connection with local ironmaker Joseph E. Thropp, limestone from this quarry was used as flux in the blast furnace for the production of pig iron. Many such quarri... More
Sainsevain Property, Limestone Quarry, 14804 Summit Avenue, Fontana, S...
Survey number: HABS CA-2661-A Public domain photograph - 1930s California, United States, free to use, no copyright restrictions image - Picryl description