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The inland waterways of the United States include more than 25,000 mi (40,000 km) of navigable waters, mostly in the eastern half of the country. The Mississippi River System is the most important waterway for ocean shipping and barge traffic, connecting Gulf Coast ports with major inland ports and the Great Lakes.
Hoover Dam is a concrete gravity-arch dam that impounds the Colorado River between Nevada and Arizona in the United States. It was built from 1931 to 1936 and provides power, flood control, water storage and recreation for millions of people.
A comprehensive list of some tunnels in the United States of America, organized by state and type. Find out the location, length, and history of road, rail, and pedestrian tunnels across the country.
Map showing the route of the National Road at its greatest completion in 1839, with historical state boundaries. Native American trails were the first in Appalachia. One of the earliest used by Europeans was Nemacolin's Path, a trail between the Potomac and the Monongahela River, going from Cumberland, Maryland, to the mouth of Redstone Creek, where Brownsville, Pennsylvania is situated.
Interstate 40 (I-40) is a major east–west transcontinental highway in the US, spanning 2,556.61 miles (4,114.46 km) across seven states. See the route map, major cities, and highway features of I-40 from California to North Carolina.
Interstate 55 (I-55) is a major cross-country highway in the central United States, connecting the Gulf of Mexico to the Great Lakes. It runs from Louisiana to Illinois, passing through Mississippi, Arkansas, Tennessee, and Missouri, and crossing the Mississippi River twice.
U.S. Route 15 is a 791.71-mile-long highway in the eastern United States, connecting South Carolina, North Carolina, Virginia, Maryland, Pennsylvania, and New York. It is one of the original U.S. Highways from 1926 and has various major junctions and intersections along its route.
Interstate 65 (I-65) is a major north–south Interstate Highway in the central United States, connecting the Great Lakes and the Gulf of Mexico. The web page provides a route map and a detailed description of I-65's length, major junctions, and features in Alabama, Tennessee, Kentucky, and Indiana.