Kevin Ivey sent in a link that details the Navy's ship disposal plans. Sure enough, the Acadia and several others will be home to the fishes and various other creatures sometime next year.  Exactly why some are sunk and others scrapped isn't explained.  Perhaps some ships are thought too good to become yet another product of China.

Here is the link: http://www.navytimes.com/news/2008/02/navy_shipdisposal_080223w/