St. Louis and dozens of other cities along the river are supporting a plan to let barges carry shipping containers.
Francis Slay joined several others in push for increase in commercial barge shipping on Mississippi.
Meanwhile, the Coast Guard investigation continues. One big question: should 114 barges breaking loose raise eyebrows?
Investigators are looking into what caused more than 100 barges to break free during recent flooding.
The river reached 35.5, feet 5.5 feet above flood stage, at a gauge near the Gateway Arch early Thursday morning but had fallen about a half-foot by midday.
Jefferson Barracks Bridge was closed for inspection early Sunday, but has since re-opened.
There had been concern that barge traffic would grind to a halt due to an ongoing drought, widely considered by experts to be the worst in decades.
The corps has hired contractors to use explosives to remove the pinnacles that stretch over about six miles near Thebes, Ill.