The Jamul Portland Cement Mine and works are located on the Jamul
rancho, 22 miles east of the city of San Diego. The company began the
construction of expensive works in the spring of 1890, which were not
completed until June, 1891, at a cost of $50,000. Seven kilns were
constructed, together with large buildings. The capacity of the works is
about 150 barrels a day. When in operation over forty men are employed
at the mine and works.
The transportation problem proved a more serious one than had been
anticipated, it costing more to haul cement from Jamul to San Diego than
it costs to bring English Portland cement to California by vessel. The
cement made by this company has been quite extensively used throughout
Southern California.