 In 2008 BP announced that it had completed replacing 16 miles/26 km of the Prudhoe Bay transit lines and the other work as planned.On November 9, 2009, a spill occurred from an 18-inch three-phase common line carrying a mixture of crude oil, produced water, and natural gas at BP's Lisburne field, part of the greater Prudhoe Bay area.BP's preliminary estimate for the total volume of oily material released was 45,828 gallons (1,091 barrels); there were 13,500 gallons (321 barrels) of crude.