The State House dome is seen behind the former Maine Department of Transportation facility in Augusta as workers remove old underground fuel tanks on Thursday.

The former Maine Department of Transportation facility is in the background behind the State House, foreground, and the Burton M. Cross State Office Building in Augusta, in this 2002 photo.

The former Department of Transportation complex, located near the State House in Augusta, is seen in March 2014.

The State House dome is seen behind the former Maine Department of Transportation facility in Augusta as workers remove old underground fuel tanks on Thursday.

The attic had been used for storage of files but is empty in this photo taken in October 2014 at the former Department of Transportation complex at 150 Capitol St. in Augusta.

The former Maine Department of Transportation facility, at top left, is seen behind the State House and Capitol Park in 1933. There were tree lined streets and houses where there are now parking lots and state office buildings.

This combination of photos shows an undated photo of 150 Capitol St. from the state archives and a photo of the same building taken on Oct. 3, 2014.