U.S. Dam Trivia
- There are 84,100 dams listed in the National Inventory of Dams (2009 edition)
- Only 2.7% of the dams are owned by the federal government
- The most common dam name is Smith Lake Dam
- 81% of the dams in the inventory are earthen dams
- 8% of the dams include more than one dam type
- 1,595 significant hazard dams are within one mile of a downstream city
- 20 dams in the inventory were completed in the 18th century
- The oldest dam in the inventory is Old Oaken Bucket Pond Dam in Massachusetts, built in 1640
- 3,123 dams were completed in 1960, the greatest number of dams completed in one year
- Texas is the state with the most dams in the inventory - 7,160
- There are 213 dams with "Beaver" in the title
