Repairs for longest canal tunnel in the West Midlands
Cracks have started to appear in Britain's longest canal tunnel, which runs 80m underneath Dudley and Netherton.
BBC Midlands Today's Bob Hockenhull has visited the tunnel, which was built in 1858, and which links the northern and southern Birmingham Canal Navigations.
£1.5m is being spent reinforcing the arch and work is expected to be finished before Easter.
Peter Mathews from the Canal & River Trust said that the canal was a "commercial thoroughfare" for Dudley and the West Midlands in the Victoria era.