- Netherton Tunnel Branch Canal
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Netherton Tunnel 
Netherton Tunnel North Portal in use 2007 Overview Coordinates 52°30′16″N 2°03′34″W / 52.50435°N 2.05932°W Status Open Waterway Birmingham Canal Navigations Start 52°30′55″N 2°02′58″W / 52.51534°N 2.04948°W End 52°29′36″N 2°04′09″W / 52.49335°N 2.06916°W Operation Opened 20 August 1858 Owner British Waterways Technical Construction 1855–1858 Length 9,081 feet (2,768 m) Tunnel clearance 16 feet (4.9 m) Width 27 feet (8.2 m) Towpath Yes (two) Boat-passable Yes 
Netherton Tunnel South Portal 2007
Netherton Tunnel Branch Canal, in the English West Midlands, is part of the Birmingham Canal Navigations, (BCN). It was constructed at a 453–foot elevation, the Wednesbury or Birmingham level; it has no locks. The total length of the branch canal is 2.4 miles (3.9 km) and the canal tunnel is 9,081 feet (2,768 m) long.
Netherton Tunnel was the last canal tunnel to be built in Britain during the Canal Age. The first sod was turned by Lord Ward on 31 December 1855 and the canal opened on 20 August 1858, providing a waterway connection between the Black Country towns of Netherton and Tipton. It was built to relieve the bottleneck of the adjacent Dudley Tunnel which is very narrow, has alternating blocks of one-way working, and had waiting times of eight hours or more, and sometimes several days.
The Netherton tunnel was built with a width of 27 feet (8.2 m) to allow two-way working of narrowboats; and is brick lined throughout. It has towpaths running through it, one on each side, which enabled horse-drawn narrowboats to be pulled through it. Chainage (distance) markers are still visible on the Eastern wall. The tunnel was fitted, from the start, with gas lighting over the towpaths, though this was later converted to electricity and it is now unlit.
The towpaths were closed to members of the public in early 2007 but from October walkers are once again allowed to access the eastern towpath of the tunnel as a through route; gates have placed on both towpaths but only those on the western towpath are kept locked and can only be unlocked by authorised personnel. Today (July 2009) the northern gate on the western path is open and unlockable and the one on the southern gate disappeared altogether. Nevertheless the western towpath is very derelict with long and deep potholes full of water.
The air vents that run along the line of the tunnel and provide ventilation, and a shaft of light into the canal, are known by the locals as "pepper pots", because of their shape. They are brick lined and the openings are covered by an iron frame or grill. The wide bore and good ventilation mean that boats using the tunnel today are allowed to use the power of their internal combustion engines, which is prohibited in the narrower Dudley Tunnel.
The tunnel cost £302,000 as opposed to the £238,000 estimate prior to construction. The main reason for the project being overbudget was the extra works necessitated by the condition of the ground through which the tunnel passes.[1]
In 1983, the British Waterways Board had 80 yards (73.2 m) of the brick invert replaced with concrete as a result of the invert rising sufficiently to impede navigation.[2]
Contents
Route
The canal runs south-west from the BCN New Main Line at Dudley Port Junction and under the Old Main Line at Tividale Aqueduct. The northern mouth of the tunnel is near Dudley Road West, close to Tipton's border with Oldbury. An air-vent stands in the middle of Aston Road; another stands between two houses in Regent Road, both in the Tividale Hall estate near Dudley. The southern mouth of the tunnel is in Warrens Hall Park on the border of Dudley and Rowley Regis - the Bumble Hole and Cobb's Engine House are nearby. The Bumble Hole is a landscaped man made lake on the site of a former clay pit. The Dudley No. 2 Canal and the Boshboil Canal Arm are joined at Windmill End Junction. The Boshboil Arm was once part of a loop of the original Dudley Canal which went around Bumble Hole. This loop ceased to be part of the main line when a more direct line was cut. The loop became severed into two arms as a result of subsidence. The northern arm is the Boshboil Arm the southern is the Bumble Hole Branch.
Features
Netherton Tunnel Branch Canal
(distances in miles)Legend
0 BCN - Dudley Port Junction 
Groveland Bridge 
Tividale Aqueduct 
0.5 Northern tunnel portal 
Aston Road air vent Regent Road air vent Approx. tunnel mid-point 
Southern tunnel portal 
Cobb's Engine Pumphouse Cobb's Engine Bridge 
2.4 Bushboil Branch, Dudley Canal - Windmill End Junction Point Coordinates
(links to map & photo sources)Dudley Port Junction 52°31′19″N 2°02′36″W / 52.52204°N 2.04331°W Groveland Bridge (Tipton Road, A457) 52°31′03″N 2°02′51″W / 52.51758°N 2.04760°W Tividale Aqueduct (Old BCN Main Line) 52°30′59″N 2°02′54″W / 52.51640°N 2.04843°W Northern tunnel portal 52°30′55″N 2°02′58″W / 52.51534°N 2.04948°W Aston Road air vent 52°30′31″N 2°03′19″W / 52.50850°N 2.05518°W Regent Road air vent 52°30′25″N 2°03′25″W / 52.50697°N 2.05708°WCoordinates: 52°30′25″N 2°03′25″W / 52.50697°N 2.05708°W Approx. tunnel mid-point 52°30′16″N 2°03′34″W / 52.50435°N 2.05932°W Southern tunnel portal 52°29′36″N 2°04′09″W / 52.49335°N 2.06916°W Windmill End Junction 52°29′30″N 2°04′13″W / 52.49157°N 2.07019°W Gallery
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Cobb's Engine House near the southern portal
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Netherton Tunnel inside northern portal showing the dual towpath
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Netherton Tunnel northern portal
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Tividale Aqueduct with old turbine which once generated electricity to illuminate the tunnel
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Tividale Aqueduct and Netherton Tunnel northern portal
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Canal cottages on the branch at Tividale Aqueduct
See also
References
- ^ Roger Cragg, 1997. Wales and West Central England: Wales and West Central England, 2nd Edition. Thomas Telford (ISBN 0-7277-2576-9)
- ^ "Repairers wary in Netherton heaving invert", New Civil Engineer, 1983, 30 June.
Further reading
- Hadfield, Charles (1969). The Canals of the West Midlands (Second ed.). David & Charles. ISBN 0-7153-4660-1.
- Perrott, David; Mosse, Jonathan (2006). Nicholson Waterways Guide 2 - Severn, Avon & Birmingham. Collins. ISBN 978-0-00-721110-4.
- Palmer, Marilyn (1994). Industry in the Landscape (First ed.). Routledge. p. 189. ISBN 0-4151-1206-2.
External links
- Shead, Jim Netherton Tunnel Branch Canal
- Shead, Jim Netherton Tunnel Branch Canal History
Categories:- Buildings and structures in the West Midlands (county)
- Canal tunnels in England
- Transport in the West Midlands (county)
- Birmingham Canal Navigations
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