Solano County California Cement Mining Ghost Town Real Photo Postcard

The scene depicts a Cement Rock Storage area likely belonging to the Pacific Portland Cement Company (P.P.C. Co), a prominent Western U.S. cement producer in the early 20th century. Cement rock, typically limestone or shale, was the primary raw material for Portland cement, and its efficient storage and transport were critical to plant operations. The postcard captures a moment of active industrial development, with a significant construction project, possibly a railway tunnel or large culvert structure, being built using extensive wooden forms and falsework, located near what is identified as Shinkle.