Syphon Carrying North Idle Drain Under Hatfield Waste Drain Approximately 280 Metres North Of Sandtoft Grange

The syphon carrying the North Idle Drain under the Hatfield Waste Drain is located approximately 280 metres north of Sandtoft Grange. It was built between 1795 and 1813, with later revetment walls. The structure features tooled ashlar facing and a parapet, along with brick and ashlar tunnels and revetment walls. It is approximately 20 metres long, running north-south. Both the north and south sides have two segmental-headed tunnel entrances, which are flanked by rusticated voussoirs and a central pointed cutwater. Above these, there is a band and a coped parapet between rectangular piers. The tunnels slope sharply down below the waterline, and the adjoining stone-coped revetment walls of the lower drain curve outwards. This syphon carries the North Idle Drain under the Hatfield Waste Drain and a trackway running alongside. The North Idle Drain was cut between 1629 and 1639 by Cornelius Vermuyden, while the Hatfield Waste Drain, formerly known as Cataline or New Cut, was improved around 1795 by Samuel Foster or around 1813 by Thackray, following proposals by John Rennie. This structure is similar to a larger syphon located south of the A18 in Crowle parish.