<P> When iron and copper were discovered in the Upper Peninsula , impetus was created for the construction of the Soo Locks , completed in 1855 . Along with mining , agriculture and logging became important industries . In 1899 Henry Ford built his first automobile factory in Highland Park , an independent city that is now surrounded by Detroit . General Motors was founded in Flint in 1908 . Automobile assembly and associated manufacturing soon dominated Detroit , and the economy of Michigan . </P>
<P> When iron and copper were discovered in the Upper Peninsula , impetus was created for the construction of the Soo Locks , completed in 1855 . Along with mining , agriculture and logging became important industries . In 1899 Henry Ford built his first automobile factory in Highland Park , an independent city that is now surrounded by Detroit . General Motors was founded in Flint in 1908 . Automobile assembly and associated manufacturing soon dominated Detroit , and the economy of Michigan . </P>
when did lumbering and mining become important in michigan
when did lumbering and mining become important in michigan
1855
1855