The times of greatest shipbuilding in the Great Lakes region was during the lumbering era. From 1839 until the early 1890s, the virgin old-growth Michigan forests were cut down to produce lumber for growing towns and cities in the lower Great Lakes. Michigan was the nation’s leading lumber producer from 1869 until about 1900. The only way to transport finished milled lumber from the shore side mills in the Great Lakes was by ship.
The picture post on our sister site about the huge dock in Forrestville gives rise to the question. Why did they name the boathouse the Iron Chief? A little exploring showed that there indeed was a ship with this unusual name but she was not made out of iron. Today, she lays in over a hundred feet of water off the shore of the Grindstone City in the Thumb Area Bottomland Preserve
In 2011, the US Army Corps of Engineers were forecasted lower Great Lakes Water Level in 2012 for Lake Superior, Lake Michigan, and Lake Huron.
Given the number of raw materials and agriculture affected, the reduced number of shipping days and access to key ports typically cost jobs and impact the United States economy. Each year, the amount of iron ore alone shipped through the Soo Locks is $500.4 billion.