Knocking Wall at High Sharnberry Lead Mine is a Grade II listed building in the County Durham local planning authority area, England. First listed on 26 November 1987. Industrial.

Knocking Wall at High Sharnberry Lead Mine

WRENN ID
broken-rubblework-dock
Grade
II
Local Planning Authority
County Durham
Constituency
Bishop Auckland MP: Dr Sam Rushworth (Lab)
Country
England
Date first listed
26 November 1987
Type
Industrial
Address
Knocking Wall at High Sharnberry Lead Mine, Eggleston
OS grid reference
NZ 011 313
Coordinates
54.67711, -1.9842
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The knocking wall at High Sharnberry lead mine is a structure located on the ore-dressing floor of the mine, likely built in the early 19th century. It is constructed from ashlar blocks and features two large blocks that are approximately 0.2 metres high, 0.6 metres deep, and 0.5 metres wide, which form a shelf. There is a third block that has been dislodged and lies on the ground nearby. Below the front edge of the blocks, two wooden pegs support rubble packing stones. The shelf shows signs of wear just behind the front edge, indicating it was used for dressing ore with hammers. This structure is a rare example of an early ore-dressing floor.

Local climate

Knocking Wall at High Sharnberry Lead Mine sits in a wetter-than-average part of the UK, with an average of 960 mm of rain a year. This makes it wetter than 75% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 59% of listed buildings.

It experiences an average of 58 freeze-thaw cycles a year, more than 97% of listed buildings. Of these, 38 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

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