The depth of the Missouri River is between 10 and 20 feet, depending on the specific area. It is the longest river in the United States and covers 2,540 miles. The Mississippi River is the second longest river in the United states at 2,340 miles.
The Missouri River extends from Montana to Missouri. It is both long and wide and has been nicknamed the Mighty Mo and the Big Muddy. The river is a major waterway used in the transportation of goods.
As of 2014, the Missouri River is becoming increasingly polluted as fertilizer runs off the ground and into the water. As a result, there are 30 species of fish that are classified as endangered.