Late Friday, the utility said that while it was possible for the plant’s commercial operation by its Dec. 31 in service date, it now anticipates another month of delay. In a U.S Securities and Exchange Commission filing, Mississippi Power said that this is “based upon the current status of commissioning activities” The project’s total cost is now estimated at $7 billion, more than two years late. Mississippi Power states in its filing that it is still testing the plant’s start-up and commissioning processes and is currently reviewing cost estimates. The filing estimates that each month’s delay will cost between $25 million and $35 million. This does not include future equipment or design problems that may occur. Mississippi Power Co. is a division owned by Southern Co. in Atlanta. It stated that shareholders would pay the extra costs incurred due to the delays and not customers.