Update on Dan River Steam Station ash basin release

             Update on Dan River Steam Station ash basin release

PR Newswire

CHARLOTTE, N.C., Feb. 3, 2014

CHARLOTTE, N.C., Feb. 3, 2014 /PRNewswire/ -- Duke Energy (NYSE:
DUK)engineers have had some success stemming the flow from an ash pond at Dan
River Steam Station.

(Logo: http://photos.prnewswire.com/prnh/20130322/CL81938LOGO)

A temporary plug periodically mitigated the leakage into the Dan River
throughout the day, and a team of experts continues to work on a solution to
completely stop the release.

Latest calculations by the company estimate 50,000 to 82,000 tons of ash has
been released to the river as a result of a break in a 48-inch stormwater pipe
at the power plant.

This volume of ash would fill between 20 and 32 Olympic-size swimming pools.

The company is also estimating between 24 to 27 million gallons of basin water
has reached the river. The release is visible several miles downstream and
crews continue to track and monitor it. Downstream municipal water supplies
remain unaffected.

As reported earlier today, the ash basin dam along the river has not been
affected and remains secure. Some erosion has occurred on the interior side of
the berm farthest from the river, and engineers continue working on a plan to
stabilize that area.

The basin was already at a lower level prior to this event since the coal
plant retired in 2012 and has not produced coal ash since then. The primary
basin is about 27 surface acres.

The N.C. Department of Environment and Natural Resources performed a site
inspection, and Duke Energy continues to work with the local and state
officials responding to this event.

Headquartered in Charlotte, N.C., Duke Energy is a Fortune 250 company traded
on the New York Stock Exchange under the symbol DUK. More information about
the company is available at: www.duke-energy.com.

Contact: Erin Culbert
24-Hour media line: 800.559.3853

SOURCE Duke Energy

Website: http://www.duke-energy.com
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