From your post, it sounds like you hurt someone.
If you didn't, you should tell her and be honest. Drinking and driving is a terrible thing that no one should ever do, but as long as you don't do it again, it's just a very hard lesson learned.
From your post though, I'm guessing you hurt or killed someone. Families don't normally disown people they love for driving infractions, so, here we are. I'm sorry, but yeah, it's just here we are.
If your daughter is an adult, I think all you can do is come clean about what happened and go from there. I mean, if you did injure or kill someone, that person will never be free of the consequences of your actions and nor should you be (and I say that gently because you really do seem sorry and I believe you are from what you wrote). If what you did affects your relationship with your daughter, then it's another consequence and it is what it is.
If your daughter isn't an adult yet, even if she's a teen, I would wait. I would just tell her that something happened when you were younger that you're not ready to talk about so you don't want to visit those places right now, and then get yourself some counselling to figure out how to tell her.
One of my parents did something bad before I was born and it affected me for a very long time after I found out at 16 even though I never did anything. Our parents are part of us and children are very good at figuring out how everything is their fault, a "sins of the father" situation.
There's a movie from about 25 years ago called Life as a House that's interesting. It's about a terminally ill man renovating his house so he can leave it to the person he injured while driving drunk. We can never un-ring a bell, but just because we ring a really bad one once in our lives, we can still make sure we spend the rest of our lives making the world a better place.