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St Columb Canal sometimes referred to as Edyvean's Canal, was an abortive canal scheme in Cornwall, England, designed for the carriage of sea sand for use as manure. It was authorised in 1773, and part of it may have been briefly used around 1780. ==History== The canal was first proposed by the Cornish engineer, John Edyvean in 1773. His idea was to run a canal from Mawgan Porth through parishes inland and to return to Newquay. Its purpose was to import sea-sand, seaweed and stone for manuring to improve land. Edyvean obtained an Act of Parliament on 1 April 1773, which authorised a canal, although it appears that the clerk must have misheard what was said, as the plans were for a canal. The engineer John Harris gave evidence to a parliamentary committee to secure the Act for the canal, the cost of which was estimated to be between £5,000 and £6,000. Edyvean planned to finance the costs himself. Work started in 1773, and two sections were built, each with an inclined plane to connect it to the foreshore, but the canal was never completed. It appears that the southern section, from Lusty Glaze to Rialton Barton near St Columb Minor, which followed the contour and was long, was started first, but may never have been used, as there were problems with the canal holding water due to sandy soil. The northern section, from Trenance Point at Mawgan Porth, which followed the contour, terminated a little short of Whitewater, where it was fed by the River Menalhyl. Edyvean advertised for 50 able-bodied men in 1776, who would be paid 14 pence (6p) per day to dig the canal. This section was some long and was used for two or three years. Edyvean appears to have spent most of his own fortune on the project, and his sister's money as well. Realising that he was unlikely to recoup much of it, the project was abandoned, and he died in the 1780s.〔 An account of the operation of one of the inclined planes was published in A. Rees's ''Cyclopaedia'' in 1805. It described a steep inclined plane covered in planks. The square tub-boats were brought to the end of the canal, where the front end of the boat was attached to a hinge, and the back end was attached to ropes. The ropes passed onto a wheel and drum, which was operated by a horse-gin. As the boat tipped up, the cargo of stones rolled down the planks to the beach below. The wheel and drum were also used to draw boxes containing coal or sand up from the beach, to be loaded into the boats. In 1829, Richard Retallick, a businessman from Liskeard, revived the idea of a canal from St Columb to Mawgan Porth, which was part of a larger project to make the Porth suitable for use as a harbour during the summer months. He issued a prospectus, but no further progress was made.〔(【引用サイトリンク】title=Edyvean Canal )〕 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「St Columb Canal」の詳細全文を読む スポンサード リンク
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