It happened at around 8:15 p.m. on Tuesday.
The Coast Guard says the name of the tug boat involved is the Thomas Dann. It was towing the crane barge down river. It cleared the Manhattan Bridge, but hit the scaffolding on the bottom of the Brooklyn Bridge.
Around 20 feet of scaffolding on the underside of the bridge was damaged.
Police say there is no structural damage to the bridge but the DOT inspection continues.
The scaffolding was being used by workers to repaint the bridge.
Currently, one lane of traffic is closed in both directions. The ramps from the FDR to the Brooklyn Bridge are also closed. The BQE ramps have reopened.
Vessel traffic was temporarily routed to the Manhattan side of the East River, but all is back to normal.
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