A bridge which allows boats to travel through Great Yarmouth on the River Yare is stuck and could take more than a week to fix.
Repair works are being carried out on the Breydon Bridge and it is unable to lift for vessel traffic.
A message on the Broads Authority twitter account, from port operators Peel Ports, said work was unlikely to be completed before February 23.
Boats wishing to travel under the bridge should contact the control room on 01493 335 5536.
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