Why wouldn't the South make salt from seawater during the American Civil War?

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Its not quite that simple. Since the process typically relies on evaporating out water from pools, it turns out you either need a somewhat reliably sunny climate to do this, or you have to set up a lot of extra large boilers. So some places are much better than others to set up shop.

That being said, the South did in fact have large-scale salterns they tried to run during the war. There was one at a salt marsh in inland Virginia, and another in the Florida panhandle. There was(/is) also a major salt mine in Louisiana.

Of course this brings us to the next major problem: these large manufacturing sites were all vulnerable to enemy action. The Union had command of the sea, which enabled them to seize the important bits of Louisiana, and to raid and destroy the Florida works at will. Presumably they could do this anywhere on the coast that the Confederates might chose to set up shop. The inland Virginia site was right next to the border with Union-controlled West Virginia, and was raided twice in 1864. On their second attempt Union forces prevailed, and were able to destroy the works.

Upvote:9

Without seeing data on salt imports versus domestic production before the war, I'm suspicious of the assertion that Wales was the primary source. If that was indeed the case, it was presumably because Welsh salt was much cheaper and/or of different quality then the salt produced domestically, for whatever reason. A lot of salt produced in the United States before the war would have come from the mines at Syracuse, NY and other places in the North.

As far as the situation during the war itself, T.E.D. has discussed the major supply and production issues. It's also worth mentioning the demand side. Soldiers on the front lines ate a lot of salted meat, and used a lot of leather, both of which required salt to produce. So even if the Confederacy produced a lot of salt, it wasn't enough that the average household could afford to use as much as they had before.

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