MMO2733 - Post-medieval drainage system north of Great Cornham (Monument)


A post-medieval or possibly 20th Century drainage system is visible on aerial photographs. A large curvilinear leat that forms part of the system is depicted on the 1890 Ordnance Survey map.

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Type and Period (1)

Protected Status

  • None recorded

Full Description

A post-medieval or possibly 20th Century drainage system is visible on aerial photographs on moorland north of Great Cornham, Exmoor. Centred at approximately SS 7459 3998, a large number of criss crossing ditches, some of which are banked extend across an area of some 6 hectares. The ditches appear to drain into a large curvilinear leat (see MMO2160), which forms part of the system. This leat, similar in form to the Pinkery Canal, is depicted on the 1st Edition Ordnance Survey map, suggesting at least part of the system was constructed and in use by the time of publication in 1890. Other similar systems are visible in the surrounding areas, some draining into natural streams and water courses, others appearing to drain into specially constructed leats. It is possible that the system was continually expanded and recut throughout the 19th and 20th Century, which would account for its apparently excellent state of preservation. [1-3]

Sources/Archives (3)

  • <1> Aerial photograph: Various. Various. Vertical Aerial Photograph. NMR OS/73109 989-90 (29 April 1973).
  • <2> Map: Ordnance Survey. 1868-1901. County Series; 1st Edition 25 Inch Map. 1:2500. 1890.
  • <3>XY Archive: 2007-2009. Exmoor National Park NMP: SS 73 NW. MD002189. [Mapped feature: #33181 ]



Grid reference Centred SS 7457 3999 (565m by 190m) (Aerial Survey)
Map sheet SS73NW

Finds (0)

Related Monuments/Buildings (1)

Related Events/Activities (0)

External Links (1)

Other Statuses/References

  • National Monuments Record reference: SS 73 NW73
  • Pastscape HOBID (was Monarch UID): 1484192

Record last edited

Sep 2 2020 2:48PM


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