TVA has Columbia Dam.
The USBR has
Anchor Dam. This dam, located on the south fork of Owl Creek near
Thermopolis, Wyoming, was started in 1957, and the primary structure was
completed in 1960. Its official status is still "under
construction", although they have pretty much given up. When the
reservoir started filling, sinkholes started forming from the weight of
the water that completely drained the reservior. They have tried
"plugging the drain", so to speak, but new holes just keep
opening up. They built a couple of dykes upstream to try to store a
little water...one of those was breached by a flood, so they rebuilt it
with a spillway that has been used once or twice.