Terra Cotta, California
Coal, along with clay deposits, was found on the site by John D. Huff in the late 1880s, and the Southern California Coal and Clay Company was formed to mine them. The town site of Terra Cotta was laid out and was given a post office on October 26, 1887. In May 1893 its post office was closed and moved to Lake Elsinore. A plant for the manufacture of sewer and water pipes was built using the coal to fire ceramic pipes in the four kilns. The finished product had to be shipped by wagon six miles through Lake Elsinore to the La Laguna rail station at the mouth of Railroad Canyon until 1896 when a spur line was built through Lake Elsinore and Terra Cotta to the new clay deposits in Alberhill. The coal mined was also used locally as fuel for the stamping mill at the Good Hope Mine and was shipped elsewhere in the state.
Winsford
Cornish china clay was used in the production of earthenware and stoneware. The clay was taken overland from Winsford by pack horse to manufacturers in the Potteries, a distance of about . Locally produced salt was also transported to the Potteries, for use in the manufacture of salt-glazed stoneware. Finished ceramics from the Potteries were brought back to Winsford, for export through the Port of Liverpool. That trade ended in the 1780s when the Trent and Mersey Canal opened and carried the goods through Middlewich, bypassing Winsford.