River Great Ouse
The River Great Ouse is a river in England, the longest of several British rivers called "Ouse". From Syresham in Northamptonshire, the Great Ouse flows through Buckinghamshire, Bedfordshire, Cambridgeshire and Norfolk to drain into the Wash and the North Sea near Kings Lynn. Authorities disagree both on the river's source and its length, with one quoting
and another. Mostly flowing north and east, it is the fifth longest river in the United Kingdom. The Great Ouse has been historically important for commercial navigation, and for draining the low-lying region through which it flows; its best-known tributary is the Cam, which runs through Cambridge. Its lower course passes through drained wetlands and fens and has been extensively modified, or channelised, to relieve flooding and provide a better route for barge traffic. The unmodified river would have changed course regularly after floods.
The name Ouse is from the Celtic or pre-Celtic *Udso-s, and probably means simply "water" or slow flowing river. Thus the name is a pleonasm. The lower reaches of the Great Ouse are also known as "Old West River" and "the Ely Ouse", but the entire length of the river is often referred to simply as the Ouse in informal usage.
Course
The river has several sources close to the villages of Syresham and Wappenham in West Northamptonshire. It flows through Brackley, provides the Oxfordshire/Northamptonshire border, then into Buckinghamshire where it flows through Buckingham, the Milton Keynes urban area and Olney, then Kempston in Bedfordshire, which is the current head of navigation.Passing through Bedford, it flows on into Cambridgeshire through St Neots, Godmanchester, Huntingdon, Hemingford Grey and St Ives, reaching Earith. Here, the river enters a short tidal section before branching in two. The artificial, very straight Old Bedford River and New Bedford River, which remain tidal, provide a direct link north-east towards the lower river at Denver in Norfolk.
The river previously ran through Hermitage Lock into the Old West River, then joined the Cam near Little Thetford before passing Ely and Littleport to reach the Denver sluice. Below this point, the river is tidal and continues past Downham Market to enter the Wash at King's Lynn. It is navigable from the Wash to Kempston Mill near Bedford, a distance of which contains 17 locks. It has a catchment area of and a mean flow of as measured at Denver Sluice.
Its course has been modified several times, with the first recorded modification in 1236, as a result of flooding. During the 1600s, the Old Bedford and New Bedford rivers were built to provide a quicker route for the water to reach the sea. In the 20th century, construction of the Cut-Off Channel and the Great Ouse Relief Channel have further altered water flows in the region, and helped to reduce flooding.
Improvements to assist navigation began in 1618, with the construction of sluices and locks. Bedford could be reached by river from 1689. A major feature was the sluice at Denver, which failed in 1713, but was rebuilt by 1750 after the problem of flooding returned. Kings Lynn, at the mouth of the river, developed as a port, with civil engineering input from many of the great engineers of the time. With the coming of the railways the state of the river declined so that it was unsuitable either for navigation or for drainage. The navigation was declared to be derelict in the 1870s.
A repeated problem was the number of authorities responsible for different aspects of the river. The drainage board created in 1918 had no powers to address navigation issues, and there were six bodies responsible for the river below Denver in 1913. When the Great Ouse Catchment Board was created under the powers of the Land Drainage Act 1930, effective action could at last be taken. There was significant sugar beet cargo traffic on the river between 1925 and 1959, with the last known commercial traffic sailing in 1974. Leisure boating had been popular since 1904, and the post-war period saw the creation of the Great Ouse Restoration Society in 1951, who campaigned for complete renovation of the river navigation. Until 1989, the river was in the care of the Anglian Water Authority until water privatisation, when the Environment Agency became the drainage and ecology authority as well as being the navigation authority.
The Ouse Washes are an internationally important area for wildlife. Sandwiched between the Old Bedford and New Bedford rivers, they consist of washland which is used as pasture during the summer but which floods in the winter, and are the largest area of such land in the United Kingdom. They act as breeding grounds for lapwings, redshanks and snipe in spring, and are home to varieties of ducks and swans during the winter months.
History: drainage and navigation
The river has been important both for drainage and for navigation for centuries, and these dual roles have not always been complementary. The course of the river has changed significantly. In prehistory, it flowed from Huntingdon straight to Wisbech and then into the sea. In several sequences, the lower reaches of the river silted, and in times of inland flood, the waters would breach neighbouring watersheds and new courses would develop – generally in a progressively eastwards fashion. The upper course of the Great Ouse marked the boundary between English territory and the Danelaw, per the terms of the Treaty of Alfred and Guthrum.In the Dark Ages, it turned to the west at Littleport, between its present junctions with the River Little Ouse and the River Lark, and made its way via Welney, Upwell and Outwell, to flow into The Wash near Wisbech. At that time it was known as the Wellstream or Old Wellenhee, and parts of that course are marked by the Old Croft River and the border between Cambridgeshire and Norfolk. After major inland flood events in the early 13th century it breached another watershed near Denver and took over the channel of the old Wiggenhall Eau, and so achieved a new exit and so joined the Wash at Kings Lynn. Parts of the old course were later used for the River Lark, which flows in the reverse direction along the section below Prickwillow, after the main river was moved further to the west. The original northern course began to silt up, depriving Wisbech of a reliable outlet to the sea, and was kept navigable by diverting the River Nene east to flow into it in the 1470s.
The Land Drainage Act 1601 allowed 'adventurers', who paid for drainage schemes with their own money, to be repaid in land which they had drained. The act covered large tracts of England, but no improvements were made to the region through which the Great Ouse flowed until 1618, Arnold Spencer and Thomas Girton started to improve the river between St Ives and St Neots. Six sluices were constructed, and Spencer attempted to obtain permission to improve the river to Bedford, but the bill for the related act of Parliament was defeated, despite support from Bedford Corporation. Some dredging was done, and Great Barford became an inland port, but he lost a lot of money on the scheme, and the condition of the river worsened.
Below Earith, thirteen Adventurers working with the Earl of Bedford formed a corporation to drain the Bedford Levels. Cornelius Vermuyden was the engineer, and a major part of the scheme was the Old Bedford River, a straight cut to carry water from Earith to a new sluice near Salters Lode, which was completed in 1637. The sluice was not popular with those who used the river for navigation, and there were some attempts to destroy the new works during the turmoil of the English civil wars. A second drainage act of Parliament, the Act for draining the Great Level of the Fens extending itself into the counties of Northampton, Norfolk, Suffolk, Lincoln, Cambridge, and Huntingdon, and the Isle of Ely, or some of them, was obtained on 29 May 1649, and Vermuyden oversaw the construction of the New Bedford River, parallel to the Old Bedford River, which was completed in 1652. There was strong opposition from the ports and towns on the river, which increased as the old channel via Ely gradually silted up. Above Earith, Samuel Jemmatt took control of the river, and navigation was extended to Bedford in 1689 by the construction of new staunches and sluices.
Between St Ives and Bedford, there were ten sluices, which were pound locks constructed at locations where mill weirs would have prevented navigation. There were also five staunches, which were flash locks constructed near to fords and shallows. Operation of the beam and paddle provided an extra volume of water to carry the boats over such obstructions. On the lower river, a combination of high spring tides and large volumes of floodwater resulted in the complete failure of Denver sluice in 1713. While there were celebrations among the navigators, the problem of flooding returned, and the channel below Denver deteriorated. Charles Labelye therefore designed a new sluice for the Bedford Level Corporation, which was constructed between 1748 and 1750 and included a navigation lock. No tolls were charged on the river below St Ives or on the New Bedford, and those responsible for drainage complained about damage to the sluices and to banks by the horses used for towing boats. A bill for a new act of Parliament to regulate the situation was defeated in 1777 after fierce opposition, and it was not until 1790 that a 'Haling Act', the , was passed, which ensured that tolls were charged and landowners were repaid for damage to the banks caused by horses. These measures were a success, as there were few complaints once the new system was in place.
Port of King's Lynn
After the river had been diverted to King's Lynn, the town developed as a port. Evidence for this can still be seen, as two warehouses built in the 15th century for trade with the Hanseatic League have survived. However, the harbour and the river below Denver sluice were affected by silting, and the problem was perceived to be the effects of the sluice. Sand from The Wash was deposited by the incoming tide, and the outgoing tide did not carry it away again. Colonel John Armstrong was asked to survey the river in 1724, and suggested returning it to how it was prior to the construction of the drainage works. John Smeaton rejected this idea in 1766, suggesting that the banks should be moved inwards to create a narrower, faster-flowing channel. William Elstobb and others had suggested that the great bend in the river above King's Lynn should be removed by creating a cut, but it took 50 years of arguing before the was obtained to authorise it, and another 26 years until the cut was finally opened in 1821. During this time, most of the major civil engineers of the time had contributed their opinions. The original project head and chief engineer was Sir Thomas Hyde Page.The work was overseen by John Rennie and Thomas Telford and construction took four years. It proved to be too narrow, resulting in further silting of the harbour, and was widened at an additional cost of £33,000 on Telford's advice. The total cost for the cut was nearly £500,000, and although the navigators, who had opposed the scheme, benefitted most from it, there were new problems for drainage, with the surrounding land levels dropping as the peaty soil dried out. The Eau Brink Act 1795 created Drainage Commissioners and Navigation Commissioners, who had powers over the river to St Ives, but both bodies were subject to the Bedford Levels Corporation. Although often in opposition, the two parties worked together on the construction of a new lock and staunch at Brownshill, to improve navigation above Earith.
In 1835, King William IV brought a case against the Ouse Bank Commissioners regarding a mandamus writ issued in 1834 about the Eau Brink Cut and possible damages it caused to the King's Lynn harbour.