A branch drain accepting waste products delivered to it vertically, by gravity, from one or more similar but usually smaller fixtures, and conducting them horizontally to the primary disposal drain.
But this preliminary document is the clearest indication of the Pentagon's thinking about the future of nuclear missiles. In short, the Pentagon plans to replace the Minuteman III ICBM with a new launch rocket, one that would launch from the same silos in Montana and South Dakota where the missiles sit now. However, a new missile does not mean a new warhead.
The Cold War may have ended a generation ago, but a fascinating new map put together by Mother Jones magazine, shows exactly where highly radioactive nuclear material is situated on mainland America. Atomicland: The new map showing the location of nuclear facilities on the mainland U.S.