This is the Glory Hole at Monticello Dam, and it's the largest in the world of this type of spillway, its size enabling it to consume 14,400 cubic feet of water every second. A glory hole is used when a dam is at full capacity and water needs to be drained from the reservoir.
A Glory hole is a hole that has been cut for the sole purpose of having your cock sucked anonymously. Gloryholes are found in public places such as rest-stop bathroom stalls, adult theater booths etc. Once only known in the gay community, as you can see below Glory Holes are becoming popular with girls too.
