This is a bad week to work at a coal plant. Wisconsin’s Dairyland Power Cooperative announced it will be closing two coal-fired generating units, partly due to regulatory requirements that make it harder to burn coal.

Dairyland will be closing two coal-fired units at its Alma Station by the first quarter of 2015. The coal units have a capacity of 136 megawatts and were built during the Eisenhower administration. The Alma Station once boasted five coal-fired unit, but the first three were shut down in 2011.

The plant’s operators say the decision was not taken lightly and including several factors.