Boyne City plans to make it illegal to jump into the river from a stretch of boardwalk and other locations.
Mayor Tom Neidhamer says police noticed large roots and other dangerous material near an area where local kids like to jump 20-30 feet into the water.
"We don't to stop people from having fun," he says. "That's what living in Northern Michigan is all about. But there's a safety issue."
He says swimming and floating on the river will still be allowed.
City commissioners expect to vote on the ordinance at the next meeting on July 9.