MCAS Tustin

Marine Corps Air Station Tustin
Tustin, California
Hangar No. 2 (Building 29) at the former Marine Corps Air Station in Tustin, California measures 1,072 feet (327 m) long by 292 feet (89 m) wide by 192 feet (59 m) tall. It and its "sister" structure (partially visible to the right) are listed on the National Register of Historic Places and designated National Historic Civil Engineering Landmarks. The two hangars, built in 1942 of Oregon Douglas fir, are among the largest freestanding wooden structures in the world. While its sister structure (the North Hangar) is slated to be included in a new park, the future of this hangar is uncertain.
Type	Military base
Site information
Controlled by	United States Marine Corps
Site history
Built	commencing 1 April 1942
In use	7 October 1942 - 2 July 1999

Marine Corps Air Station Tustin (IATA: NTK, ICAO: KNTK, FAA LID: NTK) is a former United States Marine Corps air station, located in Tustin, California.

The Air Station was established in 1942 as Naval Lighter-Than-Air Station Santa Ana, a base for airship operations in support of the United States Navy's coastal patrol efforts during World War II. It was commissioned on 1 October 1942 by its commandant, Capt. Howard N. Coulter. As of July 1947, the facility, under command of Capt. Benjamin May, had personnel consisting of 100 officers, 500 enlisted men and 180 civilian employees. NLTAS Santa Ana was decommissioned in 1949. In 1951, the facility was reactivated as Marine Corps Air Facility Santa Ana to support the Korean War. It was the country's first air facility developed solely for helicopter operations. It was renamed Marine Corps Air Station Tustin in 1979.

During the Vietnam War, the base was a center for on-going testing of radar installations which were erected, tested, disassembled and shipped to Vietnam. It also was a training facility for helicopter pilots.

By the early 1990s, MCAS Tustin was a major center for Marine Corps helicopter aviation and radar on the Pacific Coast. Its primary purpose was to provide support services and material for the 3rd Marine Aircraft Wing and for other units utilizing the base. About 4,500 residents once lived on the base, and the base employed nearly 5,000 military personnel and civilians. In addition to providing military support, MCAS Tustin leased 530 acres (2.1 km²) to farmers for commercial crop development. For many years, agricultural lands surrounded the facility. However beginning in the 1980s residential and light industrial/manufacturing areas developed adjacent to the station.

In 1991 and again in 1993, under the authority of the Base Realignment and Closure Act of 1990, it was announced that MCAS Tustin would be closed. Operational closure of the base occurred in July 1999. However, the north hangar is still used as a storage and repair center for commercial blimps. Of the approximately 1,600 acres (6.5 km²), some 1,294 acres (now known collectively as "Tustin Legacy") have been conveyed to the City of Tustin, private developers and public institutions for a combination of residential, commercial, educational, and public recreational and open-space uses. The remaining 300-plus acres will be conveyed to other federal agencies, the City of Tustin and public institutions for the same uses once environmental clean-up operations have been concluded.