Great Lakes nations maintain coast guard vessels in the Great Lakes. During settlement, the Great Lakes and its rivers were the only practical means of moving people and freight. Barges from middle North America were able to reach the Atlantic Ocean from the Great Lakes when the Welland canal opened in 1824 and the later Erie Canal opened in 1825. By 1848, with the opening of the Illinois and Michigan Canal at Chicago, direct access to the Mississippi River was possible from the lakes. With these two canals an all-inland water route was provided between New York City and New Orleans. The
Asian carp in North America barrier in the transcontinental divide Chicago Sanitary and Ship Canal. The canal connects the Mississippi River drainage basin (via the Illinois River and its tributary the Des Plaines River), to the Great Lakes Waterway (via the Chicago River), and is the only navigable aquatic link between these basins. The initial fish barrier was used as a demonstration project to study the design's effectiveness. Following positive results, construction began on a second, permanent barrier in 2004. In addition to the canal, the Corp has identified 18 sites in five additional states, from Minnesota to New York, that could allow for movement