JEFFERSON CITY, Mo. (AP) — Missouri’s largest electricity provider is backing away from a plan to develop a wind energy farm in northwest Missouri.

Ameren Missouri says it has terminated plans for a 157-megawatt wind facility in Atchison County because it was too costly to make the significant improvements that would have been needed to the transmission system.

The St. Louis-based utility says it still plans to go forward with two other wind projects — a 300-megawatt facility in Atchison County and a 400-megawatt facility in Adair and Schuyler counties. Both are planned to be up and running by the end of 2020.

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Ameren Missouri serves 1.2 million electric customers in eastern and central Missouri.