On 13 May 2008, Oklahoma County voters voted in favor of $71.5 million in general obligation bonds, the majority of which has been used to purchase the former General Motors Oklahoma City Assembly plant which is located on the south west section of the base, next to the runway. A 50-year lease-purchase agreement was executed in September 2008 between Oklahoma County and the Air Force, covering the 3.8 million square foot (353,000 m²) facility and surrounding acreage. Oklahoma County officials paid $55 million to buy the plant from General Motors, which is now called the Tinker Aerospace Complex.