Alaska Oil Piles Up at Valdez Port as Barrels Wait for Ride

Stockpiles of oil from Alaska’s North Slope have surged to a five-year seasonal high as tanker maintenance slows loadings, forcing the grade to trade at a discount to U.S. crude for the first time since 2010.

Inventories at the Valdez terminal, the northernmost ice-free port in North America and the loading point for Alaskan oil, have averaged 4.38 million barrels this month, the most for October since 2009, data posted on the Alaska Revenue Department’s website show. Tanker repairs have shrunk the pool of vessels available, terminal operator Alyeska Pipeline Service Co. said.