The Tennessee Valley Authority says it's stopped a leak from a waste site at an Alabama power plant.
The agency says the leak contained gypsum, a naturally occurring mineral that contains a substance used to make wall board and cement. A spokesman says most of the seepage flowed into a settling pond at the coal-burning plant.
A spokesman says Alabama emergency management officials are trying to see if any drinking water systems were affected. A state official says there are no homes nearby that could be endangered by the spill.
It's the second breach at a Tennessee Valley Authority facility in recent weeks. A rupture at a TVA plant in Tennessee last month poured out 1 billion gallons of coal ash.
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