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.
Welcome to Atlas Missile Silo.com. This web site is dedicated to the Atlas series of missile sites which were constructed in the early 1960's and put into service by the United States Air Force and the Strategic Air Command during the Cold War. The sites remained active until the Spring of 1965.