[2] Until 1862, salt was transported from San Francisco to the Comstock Lode, Virginia City, Nevada at a cost of US$150 (equivalent to $4,578 in 2023)/ton.

[5] In 1930, a sodium sulfate plant was built at Rhodes Marsh.

[6] By November 1932, Rhodes Marsh was producing one train car load per day and employing about 100 men.

[7] In about 1934, Germany started shipping sodium sulphate as ballast, which caused the price to drop, making mining at Rhodes Marsh unprofitable.

In 1948, mining of sodium sulphate resumed, with the output going to a Florida paper manufacturer.