Dudley Tunnel Today
In 1989 two completely new canal tunnels were made, linking Singer Cavern and the Rock Tunnel, via Little Tess Cavern, to Castle Mill Basin (the northern portal of the main tunnel).
The restrictive dimensions of the tunnel and the absence of a towpath mean that many boats are unable to pass through it. Those that can are not allowed to use diesel engines due to the lack of ventilation in the tunnel.
Visitors to the adjacent Black Country Living Museum, which opened in 1978, may take a battery-powered narrowboat trip either through the tunnel or partway through the tunnel and the adjacent mines; and, also, try legging the boat.
The rock on Castle Hill into which the tunnel is dug, Oolitic limestone, allows visitors to see Trilobite fossils preserved within it. Some fossils which were considered notable and were located close to the water line, have been removed to prevent them from being eroded and attacked by visitors. Other parts of the tunnel pass through a granite-type rock known locally as Rowley Rag; and through coal measures.
The Netherton Tunnel follows a parallel route 1½ miles to the south east; it is much larger and has twin towpaths running through it. It was built to ease congestion in the Dudley Tunnel.
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