Oil spill reported on North Slope, volume unknown

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A second leak at the well was emitting gas at a reduced rate, according to a statement Sunday by the state's Department of Environmental Conservation.

A well operated by BP Exploration Alaska Inc. on Alaska's frigid North Slope is no longer spraying crude oil after leaks were discovered Friday morning. The BP-owned well was also leaking crude oil, which stopped after authorities activated a safety valve yesterday (April 16).

In 2010, a BP-operated drilling rig called Deepwater Horizon exploded, killing 11 people and spilling almost 5 million barrels of oil into the Gulf of Mexico, making it the largest oil spill in US federal waters.

The well vented gas throughout the weekend. "However it is not now spraying crude oil". "Overnight, the Unified Command achieved source control and killed the well".

"Responders are not able to safely asses the impacted area until the well has been controlled", ADEC wrote. So far no injuries or wildlife impacts have been reported.

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The agency says the initial oil release may have affected an area of about one-and-a-half acres.

The nearest village, Nuiqsut (noo-IK-sit), is 50 miles (80.46 kilometers) away.

Responders determined the well had risen 3-4 feet, causing a pressure gauge to break off and preventing responders from pumping material into the well to kill it.

Crews are on site and working to shut down the well, BP spokesman Brett Clanton said Sunday. It has generated more than 12 billion barrels of oil, according to BP, and remains one of North America's largest oil fields.

North Slope production rose to 565,000 barrels a day in March, its highest level since December 2013. That's still down by nearly three-quarters from the peak of more than 2 million bbl in the late 1980s. The accident was the worst oil spill in the North Slope, but thankfully does not even come close to the millions of barrels that the Macondo well gushed into the Gulf of Mexico in 2010 when the Deepwater Horizon rig exploded, killing 11. DEC is coordinating with BPXA and the Alaska Oil and Gas Conservation Commission to investigate the cause.

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