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Summary

Earthworks of mounds and a pit, interpreted as evidence of a possible medieval or post-medieval alluvial tin streamworks, are visible on visualisations derived from lidar data captured between 1998 and 2017.

Location

Protected Status: none recorded

Other References/Statuses: none recorded

Monument Type(s) and Dates

• STREAMWORKS (Early Medieval to Post Medieval - 1066 AD to 1750 AD (Between))

Full description

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

The earthworks coincide with an area of woodland.

Environment Agency, 1998-2017, LiDAR DTM data (1m resolution) EA: South Devon Coast to Dartmoor, LIDAR SX6057 Environment Agency DTM 01-JAN-1998 to 31-MAY-2017 (Cartographic). SDV361470.

Earthworks of linear and irregularly shaped mounds and a pit are visible.

Hegarty, C., Knight, S. and Sims, R., 2019-2020, The South Devon Coast to Dartmoor Aerial Investigation and Mapping Survey. Area 2, Avon Valley to Plymouth (AI&M, formerly NMP) (Interpretation). SDV362982.

Earthworks of linear and irregularly shaped mounds and a pit are visible on visualisations derived from lidar data captured between 1998 and 2017. The earthworks occupy an area of circa 1.18 hectares, within a single land parcel on the eastern side of the River Yealm. They do not correspond with any pit or mound features on the available 19th and 20th century historic mapping, which shows this area as comprising woodland. Transcription of these earthworks was carried out primarily using Simple Local Relief and Positive Openess lidar visualisations. Given their subtle nature, not all visible earthworks have been transcribed and an extent of area polygon has therefore been used to define the approximate limit of the earthworks. Their character and form support the interpretation they represent the extractive pits and associated spoil heaps of a possible medieval or post-medieval alluvial tin streamworks which had passed out of use by the mid to late 19th century, by which time the area had been given over to woodland. Water used in the washing and processing of the tin-ore was probably sourced from the River Yealm, via a series of leats. Earthworks of numerous other streamworks possibly associated with these workings have also been recorded in this area. The earthworks are not visible on other available aerial imagery owing to dense tree cover. Further investigation, such as a site investigation, is recommended to help define the extent and character of this possible streamworks.

Sources / Further Reading

Associated Monuments: none recorded

Associated Finds: none recorded

Associated Events

• EDV8098 - The South Devon Coast to Dartmoor Aerial Investigation and Mapping (formerly NMP) Survey, Area 2, Avon Valley to Plymouth (Ref: ACD2040)

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