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Plaster City, California is a company town with a large gypsum quarry and plant owned by United States Gypsum (USG) [1] in Imperial County, California.It is located 17 miles (27 km) west of El Centro, [1] at an elevation of 105 feet (32 m), a two-hour drive south of Palm Springs, or a 90 minute drive east from San Diego.
On January 1, 1985, USG Corporation was formed as a holding company — a reverse merger in which United States Gypsum Company became one of just nine operating subsidiaries. In the mid- to late-1990s, the company invested in a significant expansion of its manufacturing network, adding new high-speed wallboard manufacturing operations in ...
HRLU - Hudson Railway Equipment Company (Division of Hudson Leasing Company) HRLZ - Hudson Railway Equipment Company; HROX - Lehigh Hanson, Inc. (construction aggregate producer) HRRC - Housatonic Railroad; HRRX - Conrail, On-Track Railcar Services, Inc. HRS - Hollidaysburg and Roaring Spring Railroad; HRSX - Harbor Rail Services of California ...
CalPortland Company, or simply CalPortland, is an American corporation that produces cement and other building materials. It was founded in 1891 and claims to be the largest such company in the Western United States. [1] The company was founded in California but today maintains its headquarters in Summerlin, Nevada. [2]
There were different grades of limestone within the Permanente Quarry. As lower grades of limestone were used for cement, a high-grade limestone was sold to the Spreckels Sugar Company plant in Salinas, CA to be used to purify beet sugar, a product which was enjoying a boom during the War. A deposit of low-alkali clay was also found in the ...
The mine was initially owned by a Los Angeles company known as Blue Diamond, which began mining the land in 1925. An on-site processing plant was added in 1941, followed a year later by the construction of a nearby company town, known as Blue Diamond, Nevada. The mine was eventually sold to James Hardie Gypsum, which expanded operations in 1998.
The company had mined vast amounts of gypsum found in the area. Midland was also the site of a large plant that produced wallboard and plasterboard. For some time, there was a three part railroad between the quarry and the crusher, the last part being a 3 ft ( 914 mm ) narrow gauge line running few miles. [ 1 ]
National Gypsum Company is a company based in Charlotte, North Carolina, that produces drywall gypsum boards in the US. It has 17 gypsum board plants in the US and presents itself as a fully integrated building products manufacturer. [ 1 ]