In the United States? The biggest river is also the biggest commercial waterway, the Mississippi River. Riverboats, tugs and barges are constantly in motion on the Mississippi. Mark Twain wrote a book called "Life on the Mississippi" in 1880 or so; it is definitely worth reading. It's free online at Gutenberg dot org. The Illinois River is probably in 2nd place.
Aside from the Mississippi, the Great Lakes carry a lot of commercial traffic, including ore carriers, and even ocean-going ships traveling from Chicago through the St. Lawrence Seaway and on to the Atlantic Ocean.
The major rivers in the north central plains region of Texas are Red River, Sabine River, Trinity River, Brazos River and Colorado River.
The Red River is important to the North Central Plains because it supplies water to animals.
The central plains are mostly flat with numerous streams and rivers, however the great plains are much flatter and the climate is much drier.
Oil, salt, rivers, wood
Oil, salt, rivers, wood
Oil, salt, rivers, wood
transportation petroleum, or salt
One of the major rivers that runs through the Great Plains is the Canadian River.
Arkansas river
Boston
Wausau
Major cities in the north central plains of Texas are Wichita Falls, Dallas, Fort Worth, Abilene, and San Angelo.