Corvallis AAF - Corvallis, OR - Military Installations on Waymarking.com

The Corvallis Municipal Airport is located approximately 5 miles south of the City's downtown on Airport Avenue, off Highway 99W, and currently offers private and corporate aircraft services to the Corvallis community. Originally an Army air base, the airport was returned to the City after World War II. Numerous improvements over the years include utility systems, aircraft T-hangar storage, lighting, navigational aids, and runway and taxiway improvements. The airport has one fixed-base operator which provides fueling and aircraft maintenance services in addition to aircraft rental, charter services and pilot training classes.

The following is taken from Wikipedia:

Oregon World War II Army Airfields were the airfields built or repurposed during World War II for training pilots and aircrews of United States Army Air Forces (USAAF) fighters and bombers in Oregon.

Most of these airfields were under the command of Second Air Force or the Army Air Forces Training Command (AAFTC) (predecessor of the current-day United States Air Force Air Education and Training Command). However the other USAAF support commands (Air Technical Service Command (ATSC); Air Transport Command (ATC) or Troop Carrier Command) commanded a significant number of airfields in a support roles.

It is still possible to find remnants of these wartime airfields. Many were converted into municipal airports, though some were returned to agriculture and several were retained as United States Air Force installations and were front-line bases during the Cold War. Hundreds of the temporary buildings that were used survive today, and are being used for other purposes.

The original hangar is still being used today. The original water tower still stands near the airport entrance.