Authorities say they're running alcohol and drug tests on an operator who lowered a drawbridge as a 690-foot Great Lakes freighter passed beneath on Detroit's Rouge River.
The U.S. Coast Guard says the Jefferson Avenue bridge struck the Herbert C. Jackson about 2:10 a.m. Sunday. It was carrying 23,000 tons of iron pellets for Dearborn's Severstal North America plant, and its crew of 24 escaped injury.
The Interlakes Steamship Co. owns the ship.
The bridge is just upstream from where the Rouge enters the Detroit River.
Coast Guard Lt. Justin Westmiller tells the Detroit Free Press police took the bridge's 43-year-old operator into custody on suspicion she was intoxicated.