Ham Mill Bridge is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 11 January 1989. Road bridge.

Ham Mill Bridge

WRENN ID
dusk-panel-plum
Grade
II
Local Planning Authority
Cornwall
Constituency
North Cornwall MP: Ben Maguire (LD)
Country
England
Date first listed
11 January 1989
Type
Road bridge
Address
Ham Mill Bridge, Werrington
OS grid reference
SX 344 868
Coordinates
50.65765, -4.34391
Source
Historic England listing

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

Description

Ham Mill Bridge is a road bridge over the River Ottery, built around the mid-19th century. It is constructed of stone rubble and features a single span with an elliptical arch made of dressed stone voussoirs and keystones. At the base of the parapet, there is a granite string that appears to have been rebuilt.

Local climate

Ham Mill 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 84% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 80% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 76% of listed buildings. Of these, 10 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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  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Stables and Cartshed Forming South Side of Yard at Ham Mill Farm Grade II 159 m
  2. East Entrance to Ham Mill Farmyard Grade II 169 m
  3. Two Barns Forming West Side of Yard at Ham Mill Farm Grade II 172 m
  4. Barn and Farmworkers Cottage on East Side of Yard of Ham Mill Farm Grade II 180 m
  5. Shippons, Cartsheds and Stables Forming North Side of Yard at Ham Mill Farm Grade II 191 m
  6. Ham Mill Farmhouse Grade II 212 m
  7. Nether Bridge Grade II* 443 m
  8. Milestone in Refuge of Higher New Bridge Grade II 486 m
  9. Higher New Bridge Grade I 490 m
  10. Netherbridge Farmhouse Grade II 691 m