OMAHA, Neb. (AP) — The Omaha Public Power District is evaluating its long-term options for generating electricity.

The utility’s board meets Thursday and plans to discuss its options, which might include changing the mix of coal, nuclear, natural gas and wind power plants it relies on.

OPPD spends about $650 million a year on generating power, and that represents a little over half of its budget. So it wants a cost-effective mix.

But the utility also has to make sure it’s mix of power plants can comply with environmental rules and restrictions on carbon dioxide emissions.

OPPD typically gets about 30 percent of its power from its Fort Calhoun nuclear plant. The utility spent more than $100 million to repair Fort Calhoun after flooding and a small fire caused damage in 2011.