Midwestern United States
Waterways

Three waterways have been important to the development of the Midwest. The first and foremost was the Ohio River, which flowed into the Mississippi River. Development of the region was halted until 1795 by Spain's control of the southern part of the Mississippi and its refusal to allow the shipment of American crops down the river and into the Atlantic Ocean. This was changed with the 1795 signing of Pinckney's Treaty.

The second waterway is the network of routes within the Great Lakes. The opening of the Erie Canal in 1825 completed an all-water shipping route, more direct than the Mississippi, to New York and the seaport of New York City. In 1848, The Illinois and Michigan Canal breached the continental divide spanning the Chicago Portage and linking the waters of the Great Lakes with those of the Mississippi Valley and the Gulf of Mexico. Lakeport and river cities grew up to handle these new shipping routes. During the Industrial Revolution, the lakes became a conduit for iron ore from the Mesabi Range of Minnesota to steel mills in the Mid-Atlantic States. The Saint Lawrence Seaway, completed in 1959, opened the Midwest to the Atlantic Ocean.

The third waterway, the Missouri River, extended water travel from the Mississippi almost to the Rocky Mountains.

In the 1870s and 1880s, the Mississippi River inspired two classic books— Life on the Mississippi and Adventures of Huckleberry Finn —written by native Missourian Samuel Clemens, who used the pseudonym Mark Twain. His stories became staples of Midwestern lore. Twain's hometown of Hannibal, Missouri, is a tourist attraction offering a glimpse into the Midwest of his time.

Inland canals in Ohio and Indiana constituted another important waterway, which connected with Great Lakes and Ohio River traffic. The commodities that the Midwest funneled into the Erie Canal down the Ohio River contributed to the wealth of New York City, which overtook Boston and Philadelphia.
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