The cost of repairing the ancient bridge and surrounding pathways at Tarr Steps will run into thousands of pounds.
Somerset County Council and Exmoor National Park say the landmark on Exmoor has been affected by landslips, fallen trees and erosion from recent flooding.
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Tonight, Plymouth Argyle will play Premier League giants in a 3rd round FA Cup replay. The Pilgrims drew 0-0 at Anfield earlier this month.
Alex has the forecast for Devon, Cornwall, Somerset and Dorset
Alex has the forecast for Bristol, Wiltshire, Gloucestershire, Somerset and Dorset