Years the salt mine was abandoned, from 1983-1998. The economy of salt mining dried up like a 400 million-year-old ocean, prompting the company at the time, International Salt, to say, “Na.” ...

According to the Detroit Salt Company, 400 million years ago, ocean water flooded into a large basin, an area known as the Michigan Basin.

Detroit salt mine worker (Detroit Salt Company) The mine remained in use until 1983, when International Salt closed the doors. Two years after the closure in 1985, Crystal Mines Inc. purchased the ...

Detroit Salt Mines. April 2, 2012 / 12:13 PM EDT / CBS Detroit About 400 million years ago, our state was once called a Michigan Basin. It was ...

Detroit’s salt mine has been in use since the early 1900s, according to Detroit Salt Company’s website. The mine, at 12841 Sanders St., is now a “salt city” about 1,200 feet below the city ...

LANSING, MI — Regulators are seeking public input on a draft air pollution permit for a controversial $1.2 billion salt and potash mine in Osceola County.

Detroit’s salt mine has been in use since the early 1900s, according to Detroit Salt Company’s website. The mine, at 12841 Sanders St., is now a “salt city” about 1,200 feet below the city ...