The primary site to be evaluated in this EA is the CSIA. The history of the site began in 1942 when the United States Department of Defense purchased 5,000 acres for the Clinton Naval Air Station. The facility was used primarily as a training facility for pilots. Operations at the Naval facility ceased in 1946, and the land/infrastructure was acquired by the City of Clinton. The facility was renamed the Clinton-Sherman Airport and began operation as an industrial airpark. In 1955, approximately 2,700 acres were transferred to the Air Force for use as a Strategic Air Command fighter and satellite bomber base. Numerous facilities, including 900 housing units, and a new runway were constructed at the Clinton-Sherman Air Force Base during this time frame. Between 1955 and 1964, an additional 4,107 acres of surrounding land were acquired through purchases and easements.

During the 1960s, military operations were de-emphasized, and the Clinton-Sherman Air Force Base was slated for closure. The Air Force base was formally closed on December 31, 1969. The Air Force maintained caretaker activities until the property was deeded back to the City of Clinton on June 25, 1971. The City granted leasehold interest to portions of the site to the Midwestern Oklahoma Development Authority (MODA), which subleased portions of the facility. The Air Force continued to lease portions of the facility between 1972 and 1975.

The housing units were purchased by MODA, who then began selling the units in the late 1970s. The leasehold agreement between MODA and the City of Clinton was terminated for the non-housing portions of the facility in 1989. In 1993, the City of Clinton leased the CSIA to the Southwestern Oklahoma Development Authority (SWODA). Currently, Air Force activities comprise approximately 90% of the 45,000 total annual operations at Clinton-Sherman.