How Ludington's leftover brine became an industry

The Pere Marquette Lumber Company went looking for salt under Ludington and found it deep — a brine well more than 2,000 feet down struck commercial salt in 1885, right beside the sawmills on Pere Marquette Lake. That turned out to be the smartest thing the lumbermen ever did, because it gave the town a second life for when the first one ran out.

The trick of Michigan lumber-town salt was that the two industries fed each other. A buried sea from 300 million years ago left bands of salt and bitter brine under much of the state, and you got the salt out by pumping the brine up and boiling the water off. Boiling takes fuel — and a sawmill throws off endless slabs, sawdust, and waste wood. So the mills burned their scrap to make salt, and the salt paid its own way. By the 1890s the Manistee-Ludington stretch of coast was Michigan’s biggest salt-producing region, and a generation later Ludington brine was a principal source for the Morton Salt Company of Chicago, the umbrella-girl table-salt people.

Then the pines were cut and the mills fell silent, but the brine field didn’t go anywhere. It was still down there, and it held more than table salt — magnesium, calcium, bromine, all dissolved in the same underground water. In 1942 that mattered: a wartime plant came to Ludington to pull magnesium out of the brine for the war effort, and Dow Chemical took the operation over and ran a brine-chemicals plant here for decades, drawing on a well field of dozens of wells.

So the order of things in Mason County runs backward from what you’d guess. The forest looked like the wealth and the salty water looked like a nuisance. But the trees were gone in a few decades, and the brine outlasted them by more than a century — a buried ocean quietly funding the town long after the white pine was a memory.