Dyson Dam

It's really sucking up that water!

Dyson Dam is a small power-generating dam somewhere in the United States. It generates a large amount of power for its apparent size.

Games

Shortly after the Transformers' war arrived on Earth, the Decepticon jets Starscream, Thundercracker, Skywarp and Jetfire were sent to capture the Dyson Dam. Optimus Prime and his small team of Autobots managed to fight them off, and even captured Jetfire, who it turned out had been tricked into siding with the Decepticons. Transformers G1: Awakening

Any relationship between Dyson Dam and Hoover Dam would be strictly speculation.