FINDLAY, Ohio (AP): Marathon Petroleum Corp. says nearly all of the work and materials going into its $80 million headquarters expansion are coming from northwestern Ohio.

The company is adding two new office buildings and two parking garages at its headquarters in Findlay.

A Marathon official says 90 percent of the work and materials are being bought from contractors within 60 miles of its northwestern Ohio home.

The Marathon is putting 2,500 tons of steel and 100 tons of granite into the project.

The company has 1,900 employees in Findlay.

A six-story headquarters for Marathon's pipeline subsidiary is due to completed in the spring of 2016.