Don't have bedrock here, but do have rock from golfball size to Datsun. Topsoil is about 3 to 6", then it's subsoil or what I would call hardpan. Everything I dig in the basement is subsoil clay, it's like granite till I soften it up with some water... depending on how wet it is, it's either like snott or glue. I had a couple of football sized rocks that I dug out by hand when I was digging in the posts for the walls, they were 20 to 30" below the dirt floor.
The rockpile I have under the stairs, this picture was taken Dec 2008, I haul the rocks out just about every yr, the really big rocks I carry out by hand.
