Have you noticed a terrible odor as you travel across the dam? Some believe the smell could be a damaged sewer line, others think its dead animals but Ameren Missouri says it’s neither. Ameren’s Bagnell Dam Engineer Alan Sullivan explains
Sullivan says it’s actually called hydrogen sulfate gas, it’s worse in a dry year and it gets released when they run water through the dam
Sullivan says the gas comes to the surface when the rotten vegetation moves from the water floor to the middle and runs through the turbines. He says they do check the levels to make sure it’s not harmful to humans and expects it to end by october.