Welcome, CT4. I hope you do read as much as you can here; there's a ton of wisdom and experience that's shared. Be sure to check into the stickies at the top of the page, too.
I'm sorry you find yourself in this situation after 10 decent years with him. As you see, though, things can snap right back to what they were as soon as the drinking starts again.
It sounds like you're considering leaving in order to protect your daughter and yourself, but you're concerned that if you do, your daughter will have to spend some time w/him. If you don't leave, she'll be spending a lot more time w/him, right? So I'd say your instinct to get the hell out is probably right on the money.
There are so many members who've been in your shoes, trying to decide how to protect themselves and their kids from life with an A. Again, I hope you really do read, read, read here. I'm certain you'll find many threads and posts that resonate w/you.