At 2:45 p.m. on April 17, 2023, an employee and a manager, 49, were attempting to drain a stillage tank so that repairs could be made to its internal agitator. They needed to verify the quantity level of stillage, so they attempted to remove a manway access cover on top of the tank. They encountered two bolts that were stripped, so they used an angle grinder to cut the top of the bolts off.