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HER Number:MDV25907
Name:Grimstone and Sortridge Leat


Grimstone and Sortridge Leat running from Grimstone Head Weir at SX55287729 to Sortridge Farm at SX50857109, a distance of over 9.0 kilometres. The leat splits at the Bulleye Stone (SX53447428), heading south past Pew Tor. Also splits at SX53327426, heading west towards Moortown. The leat served the medieval manor houses of Grimstone and Sortridge. Surveyed and recorded in the Dartmoor Trust Leats Project.


Grid Reference:SX 545 749
Map Sheet:SX57SW
Admin AreaDartmoor National Park
Civil ParishWhitchurch
DistrictWest Devon
Ecclesiastical ParishSAMPFORD SPINEY

Protected Status

Other References/Statuses

  • Old DCC SMR Ref: SX57SW/77
  • SHINE Candidate (Yes)

Monument Type(s) and Dates

  • LEAT (Medieval - 1066 AD to 1539 AD (Between))

Full description

Ordnance Survey, 1880-1899, First Edition Ordnance 25 inch map (Cartographic). SDV336179.

‘Grimstone and Sortridge Leat’ depicted on the First Edition Ordnance Survey map (approximately 1880s in date).

Royal Air Force, 1946, RAF/CPE/UK/1890, 1290 (Aerial Photograph). SDV169268.

Royal Air Force, 1947, RAF/CPE/UK/2149, 3177-3179 (Aerial Photograph). SDV282746.

Royal Air Force, 1949, RAF 540/226, 4174,5262 (Aerial Photograph). SDV271060.

Royal Commission on the Historical Monuments of England, 1985, Aerial Photograph Project (Dartmoor) - Dartmoor Pre-NMP (Cartographic). SDV319854.

Grimstone and Sortridge Leat. Take off from River Walkham at SX55287729. Joins leats at SX53437430 and SX53447430. Bisects into short leats at SX53327426 aimed at Moortown farm. SX52617310 aimed at Bythedown. SX52897365 aimed at Furze Cottage. Continues across Plaster Down, terminating at SX51617252.

Robins, J., 1988, The Grimstone and Sortridge Leat, 24-9 (Article in Serial). SDV347623.

Turton, S. D. + Weddell, P. J., 1992, Archaeological Assessment of Tavistock Area Water Supply, 3 (Report - Assessment). SDV340617.

Served the medieval manor houses of Grimstone and Sortridge, which lie to the south near Horrabridge (see Robins, 1988).

Tavistock and District Local History Society, 2002, Whitchuch Parish. A short History of a Devon Parish, 30 (Monograph). SDV363278.

The origins of the leat may go back to the 14th century.

Dartmoor Trust and Dartmoor National Park Authority, 2010, Dartmoor Trust Leats Project 2009-2010 (Report - Survey). SDV347530.

Grimstone and Sortridge Leat surveyed and recorded between SX574795 - SX507711 (River Walkham). Good flow. Largely on Access Land; attractive, well walked. 'Bullseye' take-offs from main leat. Needs some maintenance on crossing points. Flows across Plasterdown, divides - serves Grimstone and Sortridge. Attractive stone clapper/flow divider at split. Other details: T:\Dartmoor Leats Survey / Q:\MAPDATA\HISTORIC\LeatsProject.

Ordnance Survey, 2011, MasterMap (Cartographic). SDV346129.

Sources / Further Reading

SDV169268Aerial Photograph: Royal Air Force. 1946. RAF/CPE/UK/1890. Royal Air Force Aerial Photograph. Photograph (Paper). 1290.
SDV271060Aerial Photograph: Royal Air Force. 1949. RAF 540/226. Royal Air Force Aerial Photograph. Unknown. 4174,5262.
SDV282746Aerial Photograph: Royal Air Force. 1947. RAF/CPE/UK/2149. Royal Air Force Aerial Photograph. Photograph (Paper). 3177-3179.
SDV319854Cartographic: Royal Commission on the Historical Monuments of England. 1985. Aerial Photograph Project (Dartmoor) - Dartmoor Pre-NMP. Royal Commission on the Historical Monuments of England Aerial Photograph P. Cartographic.
SDV336179Cartographic: Ordnance Survey. 1880-1899. First Edition Ordnance 25 inch map. First Edition Ordnance Survey 25 inch Map. Map (Digital).
SDV340617Report - Assessment: Turton, S. D. + Weddell, P. J.. 1992. Archaeological Assessment of Tavistock Area Water Supply. Exeter Archaeology Report. 92.48. A4 Stapled + Digital. 3.
SDV346129Cartographic: Ordnance Survey. 2011. MasterMap. Ordnance Survey. Map (Digital). [Mapped feature: #85119 ]
SDV347530Report - Survey: Dartmoor Trust and Dartmoor National Park Authority. 2010. Dartmoor Trust Leats Project 2009-2010. Dartmoor Trust. Digital.
SDV347623Article in Serial: Robins, J.. 1988. The Grimstone and Sortridge Leat. Tamar Journal. 10. Unknown. 24-9.

Associated Monuments

MDV25903Related to: Beckamoor Combe tin streamwork (Monument)
MDV5632Related to: Beckamoor Cross beside the Grimstone and Sortridge Leat, Whitchurch (Monument)
MDV107604Related to: Boundary stone 500 metres north-east of Fullamore (Monument)
MDV123111Related to: Boundary stone north-east of Plaster Down (Monument)
MDV123110Related to: Boundary stone north-west of Sampford Manor (Monument)
MDV25909Related to: Brook Mill Leat (Monument)
MDV4111Related to: Great Western Reave, Roos Tor Section (Monument)
MDV69495Related to: Grimstone Head Weir, Peter Tavy (Monument)
MDV25902Related to: Leat on Whitchurch Common (Monument)
MDV3594Related to: Longhouse on Whitchurch Common (Building)
MDV72078Related to: Milestone on the Grimstone and Sortridge leat, Plaster Down (Monument)
MDV100812Related to: Milestone south-west of Merrivale Quarry (Monument)
MDV63572Related to: Military redoubts on Whitchurch Common (Monument)
MDV129778Related to: Quarry shown on historic maps west of Beckamoor Cross, Whitchurch (Monument)
MDV130328Related to: Reservoir to the south of Riland Plantation (Monument)
MDV108977Related to: Shoptor deserted farmstead, Sampford Spiney (Monument)
MDV15029Related to: Smithy on Whitchurch Common (Monument)
MDV76858Related to: Sortridge farmstead, Horrabridge (Monument)
MDV3599Related to: Sortridge Manor, Horrabridge (Building)
MDV26328Related to: Wheal Fortune Leat (Monument)
MDV103144Related to: Wheelwright's stone on Whitchurch Common (Monument)

Associated Finds: none recorded

Associated Events

  • EDV7441 - Condition survey of the archaeological sites of Merrivale Training Area
  • EDV7570 - Condition survey of Merrivale Range training area
  • EDV8291 - Okehampton Range: Monument Baseline Condition Survey
  • EDV7368 - Survey of the Willsworthy Training Area, Peter Tavy
  • EDV8679 - Okehampton Range: Management Survey
  • EDV8695 - North Dartmoor Military Range English Heritage Project

Date Last Edited:Jun 8 2021 4:11PM