Similar story for Gary, a once booming town around a single industry (steel).
>The Gary Works is a major steel mill in Gary, Indiana, on the shore of Lake Michigan. For many years, the Gary Works was the world's largest steel mill, and it remains the largest integrated mill in North America.
>The Gary Works remains Gary's largest single employer and a key element of the city's tax base. However, employment levels have fallen substantially since the mid-20th century; the plant and allied facilities employed over 30,000 people in the early 1970s, but only 6,000 in 1990, and 5,000 in 2015.
>The Gary Works is a major steel mill in Gary, Indiana, on the shore of Lake Michigan. For many years, the Gary Works was the world's largest steel mill, and it remains the largest integrated mill in North America.
>The Gary Works remains Gary's largest single employer and a key element of the city's tax base. However, employment levels have fallen substantially since the mid-20th century; the plant and allied facilities employed over 30,000 people in the early 1970s, but only 6,000 in 1990, and 5,000 in 2015.
https://en.wikipedia.org/wiki/Gary_Works