Cement Production in Tehachapi
From the mid-1880s until 1929, a corporation based in San Francisco operated a small company town in Antelope Canyon to produce limestone and was eventually brought under the control and ownership of the Wyman family.
In January 1909 the City of Los Angeles began production of cement at its new plant near White Rock Creek (later called Monolith). The plant was built to provide cement for the construction of the Los Angeles aqueduct to carry water from the Owens Valley to Los Angeles. In 1920 the City of Los Angeles signed a five-year lease with the U.S. Potash Company for the facility. Later that year they produced 43,767 barrels of a newly formulated waterproof plastic cement. In 1921 the plant name was changed to Monolith Portland Cement Company and the land and mill
Adjacent to the plant, the company town of Monolith provided housing for the workers as well as a railroad depot, a company store, U.S. Post Office, a school and a café. The town is gone but the plant still produces cement and has had a succession of owners. As of 2015 the plant still produces cement and has had a succession of owners. As of 2015 the plant is owned and operated by Lehigh SouthWest Cement Company but many residents still refer to the plant as Monolith due to its importance to the people of history in Tehachapi.
In 1955 the California Portland Cement Company built its plant twenty miles southeast of Tehachapi. It is one of three plants operated by the company and still employs many Tehachapi residents. Cal Portland has many years’ supply of limestone still in the ground.
Erected by Main Street Tehachapi, Tehachapi Heritage League and The City of Tehachapi.
Topics. This historical marker is listed in these topic lists: Industry & Commerce • Settlements & Settlers.
Location. 35° 7.902′ N, 118° 26.849′ W. Marker is in Tehachapi, California, in Kern County. Marker is on S Green Street, on the right when traveling north. Touch for map. Marker is at or near this postal address: 108 S Green Street, Tehachapi CA 93561, United States of America. Touch for directions.
Other nearby markers. At least 8
Credits. This page was last revised on May 29, 2019. It was originally submitted on May 28, 2019, by Denise Boose of Tehachapi, California. This page has been viewed 100 times since then. Photos: 1, 2, 3, 4, 5. submitted on May 28, 2019, by Denise Boose of Tehachapi, California. 6. submitted on May 29, 2019, by Denise Boose of Tehachapi, California. • Andrew Ruppenstein was the editor who published this page.