Marple Aqueduct

Marple Aqueduct at Marple, Greater Manchester, in north-west England was built to carry the lower level of the Peak Forest Canal across a length of the River Mersey that was renamed the River Goyt in 1896.The company's engineer, Benjamin Outram, was responsible for the design and Thomas Brown, the resident engineer, for its construction. The construction contract was placed with William Broadhead, Bethel Furness and William Anderson in 1795. Furness having died later in 1795, the aqueduct was completed by the remaining partners in 1799, but not brought into use until 1800. Seven men lost their lives during its construction.This is the highest canal aqueduct in England and the highest masonry-arch aqueduct in Britain. The difference in water levels in the river and canal is some 90 feet (27.4m) (exceeded only by the Pontcysyllte aqueduct, an iron trough carried on stone columns, where the difference is 126 feet (38.4m)). It contains some 8,000 cubic yards (6,000 m³) of masonry. The three semi-circular arches are about 78 feet (23.8m) above water level, with spans of approximately 60 feet (18.3m) at 72 feet (22m) centres. The lower parts are of red sandstone from the nearby Hyde Bank quarry. The upper parts are of white stone from a quarry at Chapel Milton. The abutments widen in well-proportioned curves and batter or diminish upwards in the same manner. The skilful use of architectural features, such as the circular piercing of the spandrels, string courses, arch rings and pilasters of ashlar stone, oval piers and stone of different type and colour have created a graceful structure, which is superlative in its class.