9. Amistad Dam
Capacity: 5,658,600
Reservoir: Lake Amistad
State: Texas/ Mexico
Everything is big in Texas. Another enormous construction lies partly in the US, and partly in Mexico. This dam ranks 9th on our list of largest hydroelectric dams in USA. It is actually a joint venture of the two countries which took only five years to build. Naturally, it is managed by International Boundary and Water Commission, which is an international body formed by the Mexican and American governments.