North Walsham and Dilham Canal
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Wikipedia has a page about North Walsham and Dilham Canal
The North Walsham and Dilham Canal is a waterway in the English county of Norfolk. It is accepted officially that this waterway is the only canal in Norfolk although it is the canalization of the upper reaches of the River Ant. This navigation was constructed with locks a little wider than most canals in the UK to accommodate the use of the Norfolk wherries. It is 8.7 miles (14.0 km) long and runs from Swafield Bridge to a junction with the River Ant at Smallburgh.