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The River Crane is a river in west London, England, and is a tributary of the River Thames. It is 8.5 miles (13.6 km) long and is entirely flowing through Greater London. River Crane flows through three London boroughs: London Borough of Hillingdon, London Borough of Hounslow and London Borough of Richmond upon Thames. ==Location== Its source is a point south of North Hyde Road in Hayes, Hillingdon, from where its course is near semi-circular to the south then east, joining the River Thames in two places: on the border of St Margarets with Isleworth and by Riverside Mill and Helene House, Isleworth. 〔(Ordnance Survey map, courtesy of English Heritage )〕 〔(Open Street Map )〕 Passing through Cranford, the river crosses Cranford Park, skirts the eastern side of Heathrow Airport (formerly the Heathrow Heath part of Hounslow Heath)〔Lyson, Daniel. 1795. Heston, The Environs of London: vol. 3: County of Middlesex, pp. 22-45. (british-history.ac.uk )〕〔Hounslow Online (hounslowtw3.net )〕 and Hounslow Heath where the Duke of Northumberland's River, a tributary, and distributary of the River Colne joins the Crane (which passes to the south of London Heathrow Airport before joining the Crane). From this point, the Crane turns gradually east and passes through Crane Park (in Whitton, Twickenham). In Crane Park is the site of the Hounslow Powder Mills which were built in the 16th century and continued to make gunpowder until 1927. The mills have disappeared, but the Shot Tower still stands nearby.〔(Local History Notes. The River Crane and Gunpowder Mills ). (PDF) . Retrieved on 2011-11-01.〕 The large millpool on an island above the mills is now a Local Nature Reserve, Crane Park Island.〔(【引用サイトリンク】title=Crane Park )〕 The river then turns to the north-east in Twickenham to join the Thames at Isleworth with a distributary splitting off (forming a second section of the Duke's River) running through Kneller Gardens — the Crane itself flows east through Cole Park in Twickenham on the border of St Margarets, where it forms its border with Isleworth. The Duke's River is tidal for the short distance below the weir by the bridge in Church Street, Isleworth, to its confluence with the Thames.〔 In Isleworth it has been diverted to flow through Mogden Sewage Treatment Works, where it provides coolant for the power station, but the treated effluent is not placed in it but is piped to the Thames at Isleworth Ait.〔(【引用サイトリンク】title=Mogden )〕 The River Crane is the boundary between the London boroughs of Hillingdon and Hounslow. Around Hanworth and Whitton, and Isleworth and St. Margarets it is also the boundary between the London boroughs of Hounslow and Richmond.〔 When extending the Piccadilly line from Hounslow West to Heathrow Airport, the high water table of the ground beneath the river made it impractical to tunnel under the river, so the line rises from tunnels to cross over it.〔 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 Crane, London」の詳細全文を読む スポンサード リンク
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