Ice buildup due to Alaskan pipeline construction , officials said . The frozen conditions make the spill less mobile , Matthew Carr of the U.S. Environmental Protection Agency said late Wednesday . Nearly 46,000 gallons of water - and - oil mixture spilled entirely on site . Spill not expected to have any effect on production or consumption in Alaska .
Ice buildup due to Alaskan pipeline construction , officials said . Nearly 46,000 gallons of water - and - oil mixture spilled entirely on site . Spill not expected to have any effect on production or consumption in Alaska .