If you Google "satellite dish bird bath", you'll get numerous hits like this one:
http://www.gardenpunks.com/2007/05/t...dish-into.html
Mine didn't seem deep enough for birds to enjoy though, so I just unbolted the top section and cut the cables to remove it from the pole. Then wiggled the pole back-and-forth about 6 times to break it off at its base.
Trash men took it all....No digging involved!