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The River Nar is a river in England, a tributary of the River Great Ouse. It rises at Mileham near Litcham in Norfolk and flows 15 miles west through Castle Acre and Narborough (the latter giving the Nar its name〔 "The River Nar is near (Narborough ) and the river name is almost certainly derived from the place."〕), joining the Ouse at King's Lynn.〔Ordnance Survey (2002). ''OS Explorer Map 250 - Norfolk Coast West''. ISBN 0-319-21886-4.〕 It has had a variety of alternative names, such as the Setch, the Sandringham, and Lynn Flu,〔 "The river Nar, by some called the Setch, Sandringham, and Lynn Flu()"〕 though these are rarely, if ever, used today. In 2011 the Nar was recognised by the Environment Agency as one of the top ten most improved rivers in England and Wales. The final section of the river near its mouth was diverted northwards when the Great Ouse was re-routed to a new outfall at King's Lynn after the thirteenth century. The river was made navigable from its mouth to Narborough and probably to West Acre as a result of an Act of Parliament obtained in 1751. Ten single-gate sluices and a pen sluice (or pound lock) were used to handle the change in level. The use of the river declined rapidly after the opening of a railway from King's Lynn to Dereham between 1846 and 1848. In 1884, the river was taken over by the River Nar Drainage Board, and closed to navigation, when an un-navigable sluice was constructed to the south of a Manure Factory in King's Lynn. A new sluice very close to the junction with the Great Ouse has been built more recently. The river has been used to power a number of mills over the centuries. The buildings or remains of five are still visible, and some still contain original machinery. Narborough Bone Mill had no road access, and bones from the whaling industry and from cemeteries in Hamburg were delivered by barge, to be ground into bone meal. The mill closed when the river was taken over, and just the mill wheel remains on the bank. ==Route== The river rises from springs on the chalk uplands close to the contour to the south-west of Tittleshall. It initially flows to the east and then to the south to cross under the B1145 Litcham Road to the west of Mileham. Turning to the west, it passes through the south of Litcham and enters a series of lakes at Lexham Hall, where it is joined by Broad Water. Lexham Hall is a large grade I listed mansion, which was built around 1700. During the Second World War, the estate was occupied by the army, and the grounds and house were severely damaged. It was bought by William Foster in 1946, who gradually restored it, assisted by the architect Jim Fletcher Watson.〔(【引用サイトリンク】title=Lexham Hall )〕 The gardens are open to the public on selected weekends during the year, although the house is not.〔(【引用サイトリンク】title=Lexham Hall )〕 Continuing westwards, the river reaches the lakes of West Lexham Hall. It is joined by a stream flowing northwards from Little Dunham before it crosses under the A1065 road and flows through Emanuel's Common. The disused Newton water mill is passed before the river reaches the village of Newton. By the time it reaches Castle Acre it is below the contour.〔Ordnance Survey, 1:25,000 map〕 The river is now wider and starts to form meanders. It passes more lakes at South Acre Hall, a large farmhouse parts of which date from the sixteenth century, and then crosses Castle Acre Common, and there are several lakes in Big Wood. A mill was located at the end of the wood. The main channel and the mill bypass both cross a minor road at fords. At West Acre the river passes the remains of an Augustinian priory and then Narford Lake, by Narford Hall.〔 The remains of the priory are grade II listed and a scheduled ancient monument. The Hall is grade I listed, and was built between 1690 and 1704 by Andrew Fountaine of Salle in Norfolk. It was enlarged in the 1830s. The river passes to the north of Narborough, where there are lakes and a fish farm. The A47 Narborough Bypass crosses, as does the original main road to Narborough,〔 beside which is a former water mill, built in the eighteenth century and repaired in the late twentieth, which still contains much of the milling machinery. The Lynn and Dereham Railway line used to cross to the west of Narborough, but it is now dismantled. The Nar Valley Way, a long-distance footpath which has been following the valley for most of the length of the river now runs along the river bank. Numerous drainage ditches are associated with the next stretch of the river, and after passing Abbey Farm, where there are the remains of another Augustinian Priory, the river is embanked, with flood banks on both sides. The Nar Valley Way crosses from the south bank to the north at the start of the embanking.〔 Some large lakes are located to the north of the channel, which were formerly a sand and gravel pit. High Bridge carries the road from Blackborough End to Wormegay over the river, and Setchey Bridge carries the A10 road at Setchey. A little to the west, the channel turns to the north, where it is crossed by the railway line from Downham Market to Kings Lynn. The A47 road, the A148 road and another minor road cross at South Lynn, and the river then joins the River Great Ouse at a sluice.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「River Nar」の詳細全文を読む スポンサード リンク
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