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Summary

The remains of whetstone mine galleries and spoil heaps of probable 18th, 19th and possibly early 20th century were visible as earthwork hollows and mounds on the west-facing slopes of the scarp circa 400 metres north of Witness Moor, Broadhembury parish, on aerial photographs of the 1940s and 1950s and digital images derived from lidar data captured from 1998 to 2014.

Location

Protected Status: none recorded

Other References/Statuses

• Old DCC SMR Ref: ST10SW/97/1

Monument Type(s) and Dates

• MINE (Early Medieval to XX - 1066 AD to 1947 AD (Between))

Full description

Royal Air Force, 1947, RAF/CPE/UK/1974, RAF/CPE/UK/1974 FS 2452-2453 11-APR-1947 (Aerial Photograph). SDV356127.

Linear gullies and earthwork mounds were visible.

Royal Air Force, 1950, RAF/541/453, RAF/541/453 RS 4106-4107 04-MAR-1950 (Aerial Photograph). SDV357845.

Linear gullies and earthwork mounds were visible.

Environment Agency, 1998-2014, LiDAR DTM data (1m resolution), LIDAR ST1104 Environment Agency DTM 01-JAN-1998 to 30-SEP-2014 (Cartographic). SDV359177.

Linear earthwork hollows and mounds were clearly visible.

Next Perspectives, 2010, Aerial Photography for Great Britain, Next Perspectives APGB Imagery ST1104 22-MAY-2010 (Aerial Photograph). SDV356259.

The earthworks were largely obscured by dense tree cover.

Hegarty, C. + Knight, S. + Sims, R., 2016-2018, The Blackdown Hills AONB and East Devon River Catchments National Mapping Programme Project (Interpretation). SDV359463.

The remains of linear gullies running perpendicular to the contours of the scarp and circular and irregularly shaped mounds were visible as earthworks on the west-facing slopes of the scarp circa 400 metres north of Witness Moor, Broadhembury parish, on aerial photographs of 1947 and 1950 onwards and digital images derived from lidar data capured from 1998 to 2014. The earthworks are most readily definable on the images derived from lidar, specifically DTM visualisations.
The linear hollows were up to circa 5 metres wide and up to 28 metres long, running perpendicular to the contours of the scarp. They are interpreted as having formed over the collapsed remains of former post-medieval whetstone mine galleries.
Immediately downslope of the collapsed tunnels three earthwork mounds up to 20 metres wide and between 13 to 35 metres long were visible. These were probably formed from the spoil excavated from the mine galleries.
The earthworks are partially obscured by light woodland cover on digital images derived from aerial photographs of 2010 but probably survive as earthworks.

Sources / Further Reading

SDV356127	Aerial Photograph: Royal Air Force. 1947. RAF/CPE/UK/1974. Royal Air Force Aerial Photograph. Photograph (Paper). RAF/CPE/UK/1974 FS 2452-2453 11-APR-1947.
SDV356259	Aerial Photograph: Next Perspectives. 2010. Aerial Photography for Great Britain. Aerial Photography for Great Britain Aerial Photographs. Digital. Next Perspectives APGB Imagery ST1104 22-MAY-2010.
SDV357845	Aerial Photograph: Royal Air Force. 1950. RAF/541/453. Royal Air Force Aerial Photograph. Photograph (Paper). RAF/541/453 RS 4106-4107 04-MAR-1950.
SDV359177	Cartographic: Environment Agency. 1998-2014. LiDAR DTM data (1m resolution). Environment Agency LiDAR data. Digital. LIDAR ST1104 Environment Agency DTM 01-JAN-1998 to 30-SEP-2014. [Mapped feature: #76478 ]
SDV359463	Interpretation: Hegarty, C. + Knight, S. + Sims, R.. 2016-2018. The Blackdown Hills AONB and East Devon River Catchments National Mapping Programme Project. Historic England Research Report. Digital.
	Linked documents:2

Associated Monuments

Associated Finds: none recorded

Associated Events

• EDV7508 - The Blackdown Hills AONB and East Devon River Catchments National Mapping Programme (NMP) project (Ref: ACD1228)

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