Boundary stone 100 metres to north east of Knightsmill Bridge is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 13 January 1988. A C18 Boundary stone.

Boundary stone 100 metres to north east of Knightsmill Bridge

WRENN ID
idle-jade-cream
Grade
II
Local Planning Authority
Cornwall
Constituency
North Cornwall MP: Ben Maguire (LD)
Country
England
Date first listed
13 January 1988
Type
Boundary stone
OS grid reference
SX 072 806
Coordinates
50.59371, -4.72522
Source
Historic England listing

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

Description

This boundary stone, located 100 metres northeast of Knightsmill Bridge, dates from the mid-18th century. It is made of granite and has a rectangular shape with a rounded top, featuring the inscription "C." On either side, there is a slate stone rubble wall that was rebuilt in the late 20th century. The stone marks the limit of the roadway that the County was required to maintain, as established by an Act of Parliament in 1759 for the construction and repair of roads connecting Launceston to Camelford, Wadebridge, St Columb, and Truro.

Local climate

Boundary stone 100 metres to north east of Knightsmill Bridge sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 11 freeze-thaw cycles a year, fewer than 90% of listed buildings. Of these, 5 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.

More on this building

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