I believe this is a swamp white oak that's on my property. It was struck by lightning about 10-15 years ago can't remember exactly. About 7 years ago the crown started dying and now where it was struck is really starting to rot out. Yes there are shrooms growing out of it. It's 164" in diameter no idea on the height. How much longer do you think it has? Next question how much will it cost to take down a tree this size?