saltworks

Willard arrived late in the evening from the Saltworks, had cut his knee very badly with his tommahawk.
The Journals of Lewis and Clark|Meriwether Lewis and William Clark
It has large saltworks, producing annually over 15,000 tons.
Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 8|Various
Iron was made to some extent, and some cloth, and saltworks were numerous.
The New Gresham Encyclopedia. Vol. 1 Part 2|Various
Near Salze we saw some fine buildings which belong to the extensive saltworks existing here.
Visit to Iceland|Ida Pfeiffer

Thus, a large quantity of water is furnished for irrigation in gardens, or for supplying the needs of saltworks.
Ten Books on Architecture|Vitruvius

British Dictionary definitions for saltworks

saltworks

/ (ˈsɔːltˌwɜːks) /

noun

(functioning as singular) a place, building, or factory where salt is produced

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012