The 2009 eruptions of Mount Redoubt renewed concerns over the safety of the nearby tank farm which holds crude oil, known as the Drift River Terminal Facility. During the earlier, 1989-90 eruptions of Redoubt, the facility was inundated and damaged by lahars. Dikes built after the 89/90 activity protected the tanks, although an aircraft hangar and runway were flooded and damaged by the flooding and related debris. In late March the US Coast Guard decided to move the millions of gallons located at the facility to prevent an ecological disaster. The plan called for then refilling the tanks with harmless ballast water to prevent them from being dislodged by flooding.