Regulated Navigation Area; Upper Mississippi River, Sabula Railroad Drawbridge, Mile Marker 535, Sabula, IA

The Coast Guard is establishing a temporary regulated navigation area (RNA) for certain navigable waters of the Upper Mississippi River under one of the navigable spans of the Sabula Railroad Drawbridge at mile marker (MM) 535. The RNA is necessary to protect persons, vessels, and the marine environment from potential hazards associated with emergency repair work to the Sabula Railroad Bridge following a vessel's allision with the bridge. This regulation applies only to southbound vessel transits through the RNA, and depending on the water flow as measured from Lock and Dam 12, this regulation either prohibits transit or establishes operating requirements unless a deviation is authorized by the Captain of the Port Sector Upper Mississippi River or a designated representative. We invite your comments on this rulemaking.