The Abyss

The Abyss is a 1989 science fiction film which was written and directed by James Cameron, starring Ed Harris, Mary Elizabeth Mastrantonio, and Michael Biehn. The original music score was composed by Alan Silvestri. It was released on August 9, 1989 in the United States.Underwater scenes were filmed in the containment building of Cherokee Nuclear Power Plant , an unfinished nuclear power plant near Gaffney, South Carolina, in the United States. It took 26.5 million liters (seven million gallons) of water to fill the tank to a depth of 13 meters (40 feet), making it the largest underwater set ever. The depth and length of time spent underwater meant that the cast and crew had to sometimes go through decompression. Filming was also done at the largest underground lake in the world — a mine in  Bonne Terre, Missouri, which was the background for several underwater shots. B movie maker Earl Owensby, of Shelby NC, provided facilities for set and production.
See more at Wikipedia.org...