Classes at the small Liberty School District in south Spokane County were delayed two hours Friday after maintenance workers mistakenly shut off a water pump.

“In the interest of safety, they flipped some breakers, and one of the breakers that got flipped goes to the water pump,” said Brett Baum, superintendent of the district that includes an elementary building and a high school on the same campus southeast of Spangle. “It was just an unforeseen mistake, that one get missed when they turned them back on.”

Buses will run two hours late and breakfast will not be served, the district reported on his website. Baum said all after-school activities will occur as planned, and the delay was to allow the district’s water supplies to recharge before students attended classes.

Classes in the southern Spokane County district, which serves the communities of Spangle, Fairfield, Latah Waverly, Plaza and Mt. Hope, started on Thursday. Roughly 530 students attended classes at the schools.

“I’m glad this wasn’t yesterday,” Baum said.