New Bedford River

New Bedford River
New Bedford River at Oxlode
Specifications
Status	Open
Navigation authority	Environment Agency
History
Principal engineer	Cornelius Vermuyden
Date of act	1649
Date of first use	1652
Geography
Start point	Earith
End point	Denver Sluice
Connects to	River Great Ouse

Old and New Bedford Rivers
to King's Lynn River Great Ouse and Relief Channel Salter's Lode Lock A G Wright sluice Denver Sluice Old Bedford Sluice Old Bedford River New Bedford River Lake Farm pumping station Upwell Fen pumping station Welmore Lake Sluice Cock Fen pumping station Footbridge to WWT Welney Welney flood control gate A1101 Delph Bridge, Welney A1101 Suspension Bridge Old Bedford and River Delph Glenhouse pumping station 100-Foot PS and Engine Basin March to Ely Railway Purls Bridge pumping station Oxlode pumping station Old Mill Drove pumping station Welches Dam pumping station Welches Dam Lock (derelict) Mepal pumping station Mepal Bridge A142 bridges, Mepal Sutton Gault bridges Counter Drain Old and New Bedford Rivers Earith Sluice A1123 bridges Hermitage Lock, Old West River to Bedford

The New Bedford River, also known as the Hundred Foot Drain because of the distance between the tops of the two embankments on either side of the river, is a man-made cut-off or by-pass channel of the River Great Ouse in the Fens of Cambridgeshire, England. It provides an almost straight channel between Earith and Denver Sluices. It is tidal, with reverse tidal flow being clearly visible at Welney, some 19 miles (31 km) from the sea.

History

In the 1620s, there was discontent in the region through which the New Bedford River now flows, as the land was regularly inundated by flood water. Francis Russell, 4th Earl of Bedford, who owned large tracts of land in the vicinity, agreed to carry out drainage works in 1630, in return for 95,000 acres (38,000 ha) of the land which would be reclaimed. He was joined in the project by thirteen other adventurers, who formed a corporation and obtained a charter to carry out the work in 1634. The Dutch engineer Cornelius Vermuyden was engaged to oversee the work, which included nine major drainage channels, including the Bedford River, which ran from Earith to Salter's Lode. The tract of land through which it ran became known as the Bedford Level, and the scheme was declared to be complete in 1637. However, in 1638, that decision was reversed, and King Charles I became the undertaker to ensure the work was completed. The adventurers were given 40,000 acres (16,000 ha) for the work that had already been carried out, and further work was again to be overseen by Vermuyden, but little work was done, as the English Civil War intervened. The existing works were neglected, and some were deliberately damaged during the hostilities.

In 1649, interest in the drainage of the Bedford Level resumed, and a second Drainage Act was obtained. It became known as the 'Pretended Act', and authorised William Russell, the 5th Earl of Bedford, to carry out further work, the chief of which was a second channel parallel to the Bedford River. Vermuyden was again the engineer, and the new channel was completed in 1652. The Bedford River became known as the Old Bedford River, and the new channel became the New Bedford River. Sluices were built at Earith and Denver, and the river carried most of the flow of the River Great Ouse, resulting in its old course via Ely becoming just a drainage channel. The Corporation of the Bedford Level was set up, and took control of the river and the drainage channels, under the terms of the General Drainage Act, passed in 1663. This move was not popular with those engaged in navigation on the Great Ouse, as the sluices were operated for the benefit of the drainage scheme, and boats often had to wait for days or weeks while the sluices remained closed. The destruction of the Denver Sluice in 1713, caused by exceptional flood levels, was celebrated by the boatmen, but the resultant flooding led to the Corporation building a new sluice between 1748 and 1750. The concerns of the boatmen were placated by the provision of a navigation lock in the structure.

The outlet of Welmore Lake Sluice into the New Bedford River

Some of the workers who built the New Bedford River may have been Scottish prisoners-of-war captured at the Battle of Dunbar, since a number of such prisoners were used on drainage schemes in the Fens, because labourers were scarce. After 1652, they were supplemented by Dutch prisoners, as a result of sea battles between Admiral Blake and Lieutenant-Admiral Tromp during the First Anglo-Dutch War, and probably by a colony of French workers stationed near Thorney Abbey.

Towards the northern end of the washes, the New Bedford River is joined by the River Delph at Welmore Lake Sluice. The origins of this channel, which is sometimes called the thirty-foot drain, are obscure, although it was built to assist the removal of water from the washlands, according to C. N. Cole writing in 1784. Prior to 1825, there was a dam where the sluice is located, and water was let out of the washland by cutting a slot in it, which the flood water enlarged as it passed through. The cost of rebuilding the dam at the end of the process was considerable, and this unsatisfactory arrangement was replaced by a sluice. At the same time, the New Bedford River was made wider and deeper, while some of the flood banks were also raised. At its southern end, the River Delph is connected to the Old Bedford River at a double bend near Welches Dam. The northern half of the Old Bedford River is no longer connected to its southern half. It is not known exactly when this configuration was built, although it may have been between 1789 and 1821, since Cole's map of 1789 shows the Old Bedford River proceeding in a straight line, and Baker's map of 1821 shows two rivers, each with a double bend. Blair argues for a date soon after the New Bedford River was built, however, since Welches Dam is named after Edmund Welche, who worked with Vermuyden, and the dam in question was originally built across the Old Bedford River.

Course

The New Bedford River follows a fairly straight course, heading approximately north-east for 20.8 miles (33.5 km) from Earith to Denver Sluice. While there are no real restrictions on the length or width of boats, draught is limited to 2 feet (0.6 m) and headroom to 7.8 feet (2.4 m), although the river is tidal, and so these values can fluctuate depending on the state of the tide.

Aerial view of the New (middle diagonal grey line) and Old (right diagonal grey line) Bedford Rivers crossed by the Ely-March railway (bottom dark line)

The area between the two Bedford Rivers, 20 miles (32 km) long and 1,070 yards (980 m) wide at their greatest separation near Welney, is below the rivers and below sea level, and is frequently flooded during winter. There is a sluice at Earith which is used to control the waters of the River Great Ouse. It was built with nine openings in 1637, but was subsequently rebuilt with seven openings in 1824, and again with three openings in 1954. When flows in the upper river are normal, the sluice gates are closed, and most of the flow is routed along the tidal New Bedford River. As flows increase, the sluices are opened, and water flows along the Old Bedford River, which progressively floods the 8.9 square miles (23 km²) of washlands which comprise the Ouse Washes. At Welney, these washes provide an ideal habitat for wildfowl and other birds, and the Wildfowl and Wetlands Trust has established a nature reserve here, the WWT Welney. The reserve occupies 990 acres (400 ha), and is accessible from the A1101 bridge by following a minor road to the carpark, and then crossing the New Bedford River by a footbridge. It is important for its wild flowers, dragonflies and butterflies, as well as the birds, which are most numerous when the washland is flooded.

There are public footpaths on both sides of the river for most of its length, the only exception being a short section of the western bank near Earith. A long-distance footpath called the Hereward Way crosses the river by the A1101 bridge at Welney, and then follows the eastern bank southwards almost to the March to Ely railway line. It turns to the east a little before the bridge, following the north bank of the Engine Basin, a drainage channel which is pumped into the river by the Hundred Foot Pumping Station.

Bibliography

• Blair, Andrew Hunter (2006a). The River Great Ouse and tributaries. Imray Laurie Norie and Wilson Ltd. ISBN 978-0-85288-943-5. {{cite book}}: Invalid |ref=harv (help)
• Blair, Andrew Hunter (2006b). Fenland Waterways. Imray Laurie Norie and Wilson Ltd. ISBN 978-0-85288-994-7. {{cite book}}: Invalid |ref=harv (help)
• Boyes, John; Russell, Ronald (1977). The Canals of Eastern England. David and Charles. ISBN 978-0-7153-7415-3. {{cite book}}: Invalid |ref=harv (help)
• Cumberlidge, Jane (2009). Inland Waterways of Great Britain (8th Ed.). Imray Laurie Norie and Wilson. ISBN 978-1-84623-010-3. {{cite book}}: Invalid |ref=harv (help)
• Darby, H.C. (2011) [1958]. The Draining of the Fens. Cambridge University Press. ISBN 978-1-107-40298-0. {{cite book}}: Invalid |ref=harv (help)