Waterworks at Blagdon: Road Bridge over the By-wash is a Grade II listed building in the North Somerset local planning authority area, England. First listed on 20 March 2015. Bridge.

Waterworks at Blagdon: Road Bridge over the By-wash

WRENN ID
idle-screen-curlew
Grade
II
Local Planning Authority
North Somerset
Constituency
North Somerset MP: Sadik Al-Hassan (Lab)
Country
England
Date first listed
20 March 2015
Type
Bridge
OS grid reference
ST 504 602
Coordinates
51.33936, -2.71299
Source
Historic England listing

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

Description

The road bridge spans the by-wash at the north end of the earth dam at Blagdon Lake, formerly known as the Yeo Reservoir. It was designed by the architect and engineer Charles Hawksley as part of the waterworks at Blagdon, constructed between 1898 and 1905.

This three-span bridge is made of stone ashlar. Each span features projecting cut-waters on either side, which are capped with domed copings. The spans have slightly pointed arches adorned with decorative moulded architraves, and a coved cornice is positioned above, just below the bridge's parapet. The parapet is finished with square piers that have pyramid copings.

Local climate

Waterworks at Blagdon: Road Bridge over the By-wash receives an average of 850 mm of rain a year. This makes it wetter than 60% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 73% of listed buildings.

It experiences an average of 30 freeze-thaw cycles a year, fewer than 63% of listed buildings. Of these, 12 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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