I admire your concern for your niece; it's clear you care a great deal for her. I don't know the area with regard to AA, but you might check, anonymously, with EKU for any programs they have in place, or in Lexington.
Most important, however, is that she reach out for help; no one can do that for her. If she has reached out to you, I'd show her this site. It's a God-send for people of all ages, and a lot of young, college-aged students get help here.
Good luck. I remember my senior year, and my impatience in wanting it to be over. It's certainly not uncharacteristic for alcoholics to go the distance, just to fall short of the finish line. Your help may be what makes the difference in her achieving her degree. But, she must want it.
Good luck!