Water levels of the Birmingham Canal Navigations

The BCN New Main Line (Birmingham Level) running to the left of the New Smethwick Pumping Station. The BCN Old Main Line (Wolverhampton Level) runs 20 ft higher, to the right of the building.
Another view of the New Smethwick Pumping Station, with the Wolverhampton Level to the right and the Birmingham Level on the left

The Birmingham Canal Navigations (BCN), a network of narrow canals in the industrial midlands of England, is built on various water levels. The three longest are the Wolverhampton, Birmingham, and Walsall levels. Locks allow boats to move from one level to another.

Heights given are nominal elevation above sea level in feet relative to the Ordnance Datum Liverpool.