The Air Force Plant Peter J. Kiewit and Sons (PJKS) site is owned and operated by Lockheed Martin Astronautics Operation. The plant is located 25 miles southwest of Denver, near Waterton Canyon, Colorado. PJKS consists of 464 acres, and is surrounded by another 4,700 acres of Lockheed Martin land. Company operations at PJKS include testing Titan rockets, as well as designing, developing, testing and manufacturing advanced technical systems for space and defense. Historical operations contaminated soil and groundwater with hazardous chemicals. Following cleanup, operation and maintenance activities are ongoing.