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.
The 341st Missile Wing, headquartered at Malmstrom Air Force Base, Mont., is the host unit and one of three U.S. Air Force Bases that maintains and operates the Minuteman III intercontinental ballistic missile. Malmstrom is the youngest community in Montana and the youngest workforce in the Air Force.