JACKSON, Miss. (AP) — Southern Co. said Thursday that it will cost at least another $59 million to finish the power plant it’s building in eastern Mississippi’s Kemper County, pushing the total cost above $5.6 billion

The Atlanta-based parent of Mississippi Power Co. also announced that the work on the parts of the plant that will gasify lignite and extract chemicals now won’t be done until the second half of 2015. Another part, where turbines generate electricity, is running on natural gas.