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Penton Hook Lock is a lock on the River Thames in England situated on the northern "Middlesex" bank near Laleham, Surrey. The lock cuts across a large loop or hook in the river, creating Penton Hook Island There is a large marina (Penton Hook Marina) in the disused gravel pits connected to this loop. At over it is the third longest lock on the river. There are two weirs, which were built some time after the lock. One weir links across to Penton Hook Island, and the other from the island across the old course of the river. The former weir has a wide footpath to the island, but the footpath across the other weir is closed. ==History== There was a history of problems to navigation caused by floodwaters bursting across the neck of the island. A lock was suggested here in 1809, and an enabling act passed in 1814. The lock was completed in 1815, two years after Chertsey Lock, to become the lock farthest upstream on the Thames which was controlled by the City of London. This is why the City's arms appear on the Lock Cottage built in 1814. The first weir was not built until 1846, positioned below the outfall of the Abbey River for the benefit of the miller. This caused problems of too strong a stream and it was relocated above the outfall. The lock was rebuilt in 1909.〔Fred. S. Thacker ''The Thames Highway: Volume II Locks and Weirs'' 1920 - republished 1968 David & Charles〕 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「Penton Hook Lock」の詳細全文を読む スポンサード リンク
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