Bridge Over Road and Revetments to Cutting, 160 Metres to South of Nettleden Road is a Grade II listed building in the Dacorum local planning authority area, England. First listed on 19 March 1987. Bridge.
Bridge Over Road and Revetments to Cutting, 160 Metres to South of Nettleden Road
- WRENN ID
- scattered-window-hyssop
- Grade
- II
- Local Planning Authority
- Dacorum
- Constituency
- Harpenden and Berkhamsted MP: Victoria Collins (LD)
- Country
- England
- Date first listed
- 19 March 1987
- Type
- Bridge
- OS grid reference
- TL 018 103
- Coordinates
- 51.78282, -0.52459
- Source
- Historic England listing
Description
The bridge over the road and revetments to the cutting, located 160 meters south of Nettleden Road, is a Grade II listed structure. This flyover bridge was designed to carry the former principal drive to Ashridge over a local road that has been artificially lowered, featuring revetted sides. It dates from the early 19th century, likely designed by James Wyatt for the Earl of Bridgewater around 1808.
The bridge is constructed of red brick in English bond, with a Portland stone string course, piers, and hogsback-section coping. The revetments are made of similar brick and bond, incorporating large panels of uncoursed knapped flints. The bridge has a Tudor arch with a span of about 4 meters and a height of 3.5 meters to the springing of the arch. It is built in six segments that step up the slope to the south, supporting a wide carriageway for the former drive that runs east-west at the upper level.
Low brick parapets with splayed ends are interrupted by four tall Gothic stone piers on each side, which feature cusped panels on each face and cross-gabled tops. While the lower halves of these piers remain intact, the upper parts have collapsed nearby. The deep cutting with revetted sides extends for some distance.
Local climate
Bridge Over Road and Revetments to Cutting, 160 Metres to South of Nettleden Road sits in a drier-than-average part of the UK, with an average of 730 mm of rain a year. This makes it drier than 78% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 77% of listed buildings.
It experiences an average of 36 freeze-thaw cycles a year, more than 64% of listed buildings. Of these, 17 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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