But if weak aluminum prices led to a negative balance in that tracking account, Century would have to pay that amount to Appalachian Power to help the utility offset the burden carried by its other customers.
PSC spokeswoman Susan Small said the commission won't comment until it sees a filing from Century.
Appalachian Power, a unit of American Electric Power Co., said in a statement late Tuesday it was studying the order and was planning to file a petition for reconsideration.
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