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.
When the Minuteman III retires, the silos and launch facilities at Malmstrom Air Force Base in Montana, which oversees 150 nuclear ICBMs scattered across a 13,800 square miles, will have been buried for 70 years.
International Panel on Fissile Materials. Countries: United States. The United States is a nuclear weapon state member of the Non-Proliferation Treaty. In April 2015, the United States declared a stockpile of 4717 warheads as of the end of September 2014. This stockpile included about 1,900 strategic warheads deployed on about 800 missiles and bombers, 180 non-strategic warheads and approximately 2,600 warheads in reserve. Additional 2500 warheads are awaiting dismantlement.