Partial answer: the ammonium perchlorate is manufactured in the western United States.
The two perchlorate manufacturing facilities located in Henderson, the
Kerr-McGee and the PEPCON plants, supplied the entire perchlorate
demand for the United States until 1988, when the PEPCON plant was
destroyed by an explosion.
(note: Henderson is in Nevada)
The PEPCON plant was rebuilt in Cedar City, Utah. It is now run by AMPAC who is now the sole US producer.
One result of the fallout from such a massive industrial disaster was
the merging of PEPCON and Kerr-McGee into one producer of ammonium
perchlorate under the roof of a state-of-the-art facility designed to
handle all of the U.S. government’s ammonium perchlorate needs in
Cedar City, Utah, with a 40 million pound-a-year capacity.
The government decided to assist in consolidating the business because
having two suppliers was not efficient, according to one source. The
two suppliers were having to make up for large fixed costs to run
their facilities while producing roughly 20 million pounds per year.
Merging the two under one roof drove the cost per pound of ammonium
perchlorate down due to economies of scale.
The government also right-sized the facility based on the amount of
ammonium perchlorate it projected it would need on a regular yearly
basis. The cost to the government for its AP purchases each year has
been roughly $60 million on a consistent basis, the source said.