McClellan Air Force Base

McClellan Air Force Base was a major United States Air Force installation located northeast of Sacramento, California. Established in the late 1930s, it served for over six decades as a critical center for aircraft maintenance, logistics, and avionics overhaul. The base played a vital role in supporting military operations from World War II through the Cold War before its closure in 2001. Its extensive facilities and workforce made it a cornerstone of the regional economy and a key asset for Air Force Logistics Command.

History

The origins of the base trace to 1935 when the United States Army Air Corps selected the site near Sacramento for a new air depot. Construction began in 1936, and the facility was dedicated in 1939 as Sacramento Air Depot, later renamed for Major Hezekiah McClellan, a pioneer Army Air Service pilot. Its strategic location on the West Coast proved immediately valuable with the outbreak of World War II, as it became a primary hub for repairing and modifying B-17 Flying Fortress and B-24 Liberator bombers. Throughout the Cold War, the base’s mission expanded under Air Force Logistics Command, managing vast inventories of aircraft parts and supporting fleets like the F-117 Nighthawk and B-52 Stratofortress. The installation was also a critical site for Pacific Air Forces logistics and hosted numerous tenant units from other Department of Defense agencies.

Operations and units

As a premier air logistics center, the base’s primary mission involved the overhaul, repair, and modification of a wide array of Air Force aircraft and systems. Key operations included extensive work on avionics, hydraulics, and jet engine components for fighters like the F-4 Phantom II and F-111 Aardvark. Major assigned units included the Sacramento Air Logistics Center and its various depot squadrons, which employed a civilian workforce of thousands. The Defense Reutilization and Marketing Office managed surplus property, while specialized units handled cryptographic equipment and reconnaissance systems. The base also hosted the United States Coast Guard’s Aviation Training Center and elements of the California Air National Guard, including the 162nd Fighter Wing.

Environmental cleanup

Operations at the base, particularly electroplating, degreasing, and paint stripping, led to significant soil and groundwater contamination with solvents and heavy metals. The United States Environmental Protection Agency designated the installation a Superfund site in 1987. The Air Force Center for Engineering and the Environment led a massive, long-term remediation program involving the United States Army Corps of Engineers and the California Department of Toxic Substances Control. Cleanup efforts included soil vapor extraction, groundwater treatment, and the removal of underground storage tanks. This ongoing process became one of the largest such projects in Department of Defense history, continuing well after the base’s closure.

Closure and redevelopment

Selected for closure by the 1995 Base Realignment and Closure Commission, the base ended active military operations in 2001. Ownership was transferred to McClellan Park, a private redevelopment entity, under the oversight of the Air Force Real Property Agency. The McClellan Business Park now occupies the site, hosting over 200 companies and agencies, including Aerospace Corporation and the California Governor’s Office of Emergency Services. The Sacramento County Sheriff's Department and the National Oceanic and Atmospheric Administration also operate major facilities there. The former airfield is maintained as a public-use airport, McClellan Airfield, supporting cargo and general aviation.

Legacy and significance

For over sixty years, the base was an economic engine for the Sacramento metropolitan area, employing tens of thousands of civilian and military personnel. Its technical expertise in aerospace maintenance and logistics directly supported major conflicts from World War II to the Gulf War. The environmental challenges and subsequent cleanup set important precedents for Department of Defense remediation policy. Today, its successful conversion into a multi-use business and technology park is considered a model for base redevelopment, preserving its economic role while repurposing its substantial infrastructure for new public and private sector missions.

Category:Closed facilities of the United States Air Force Category:Superfund sites in California Category:Sacramento County, California Category:1939 establishments in California