John S. Hark, Hannibal's emergency management director, reported the City of Hannibal set the floodgates at Hill Street and Center Street at 10:30 a.m. Saturday, Sept. 8. Broadway and Main Street remained open.
Hark explained that a crest prediction of 20.5 feet or more requires the gates on Hill and Center streets be set. The remaining three gates — two on Broadway and one on South Main Street — are placed when the forecast is at 21.5 feet or more.
On Monday, Sept. 10, Hark reported the river had crested at 20.61 feet, according to his early morning reading, and it was receding.
“I believe it's on its way down, very slowly,” he said, adding he was glad it didn't rise any higher.
The floodgates on Hill and Center streets are required to remain in place until the river recedes to 18 feet, he said. “They may be in all week.”