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.
That would allow the missile to reach Alaska or to strike U.S. bases on the Pacific island of Guam. According to South Korea's daily newspaper Chosun Ilbo, citing an unnamed government official, North Korea had completed production of at least three ICBM-standard missiles as of last year.