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Lough Allen ()〔(Placenames Database of Ireland )〕 is a lake on the River Shannon in northeastern Connacht, Ireland. Most of the lake is in County Leitrim,〔 with a smaller part in County Roscommon. The lake lies to the south of the River Shannon's source, near the Iron Mountains, and is the uppermost of the three main lakes on the river. The other two, Lough Ree and Lough Derg are much further to the south. The lake is shaped like an upturned isosceles triangle. The Shannon enters the lake at the wider northern end and leaves the lake at the narrow southern end. Other rivers that feed the lake include the Diffagher (northwest), the Yellow (northeast), the Stoney (east) and the Arigna (southwest). The R280 regional road skirts the west side of the lake, while the R207 follows the east bank, from Ballinagleragh to Drumshanbo. The R200 road is on the north side of the lake, traveling west from Dowra to Drumkeeran. The Iron Mountains (Slíabh an Íariann) lie to the east and west of Lough Allen. On the construction of the Shannon hydroelectric scheme in 1925-9, the lake became a storage reservoir for the power station nearly 100 miles away, with sluices to control the flow into the river. This helps to maintain the flow during dry periods and manage flooding at other times. It made the Lough Allen Canal, which was rarely used by this time, unusable and this was not restored until 1996. Some claims have been recently made that volumes of oil and gas lie beneath the lake and the Allen basin. ==Lough Allen Regattas== In the mid 19th Century, regattas were held by M. O'Conor at Lough Allen Island which is also known as O'Reilly's Island at the southern end of the lake. The house is destroyed, and only a ruin now exists. Regatta parties were held at Birchill's House, Blackrock. E.K. Tenison of Kilronan Castle, the world famous photographer, Captain Tottenham, Captain Birchill and Francis la Touche attended the Regatta parties Among the yachts competing in the regattas were 'Corsair', 'Avenger', 'Querida', 'Meta' and 'Shamrock'.〔Alf Delany archives〕 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「Lough Allen」の詳細全文を読む スポンサード リンク
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