| Statistic Verification |
| Source: American Rivers, World Atlas |
| Research Date: 8.25.2012 |
| U.S. River Statistics | |
| Total percent of U.S. Rivers protected designation | 26% |
| Total amount of river miles that lie behind Dams | 600,000 miles |
| Total amount of Dams in the U.S. | 70,000 |
| Total distance of the longest river (Missouri River) in the U.S. | 2,540 miles |
| Total length of river span in the U.S. | 3.6 million miles |
| Total percent of threatened or endangered animals that depend on rivers or streams | 50% |
| Total depth of water if the Great Lakes were spread evenly over the U.S. | 10 feet |
| Total amount one gallon of water weighs | 8.34 pounds |
| Total number of rivers in the U.S. | 250,000 |
| Total flow volume of the largest river (Mississippi River) in the U.S. | 593,000 cubic feet per second (at it’s mouth) |
| Total percentage of rivers that are to polluted to fish or swim in | 40% |
| Top 10 Largest Rivers in U.S. Statistics | |
| River | Distance |
| Missouri | 2,540 |
| Mississippi | 2,340 |
| Yukon | 1,980 |
| Rio Grande | 1,900 |
| St. Lawrence | 1,890 |
| Arkansas | 1,460 |
| Colorado | 1,450 |
| Red | 1,290 |
| Brazos | 1,280 |
| Columbia | 1,240 |
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