Severn Bridge and Aust Viaduct First Severn Crossing is a Grade I listed building in the local planning authority area, England. First listed on 29 May 1998. Bridge. 2 related planning applications.
Severn Bridge and Aust Viaduct First Severn Crossing
- WRENN ID
- ruined-zinc-raven
- Grade
- I
- Local Planning Authority
- Constituency
- Forest of Dean MP: Matt Bishop (Lab)
- Country
- England
- Date first listed
- 29 May 1998
- Type
- Bridge
- Address
- Severn Bridge and Aust Viaduct First Severn Crossing, M48 Motorway, South Gloucestershire
- OS grid reference
- ST 558 902
- Coordinates
- 51.60916, -2.63823
- Source
- Historic England listing
Description
The Severn Bridge and Aust Viaduct, part of the First Severn Crossing, is a motorway bridge over the River Severn, built between 1961 and 1966. Designed by Freeman Fox and Partners in collaboration with Mott, Hay and Anderson, with consulting architect Sir Percy Thomas, the bridge features steel cables, a deck and towers, and a concrete substructure and foundation, including cable anchorages and piers for the towers. The viaduct structure is made of steel with a concrete deck slab.
The suspension bridge has a main span of 987.5 meters, flanked by two side spans of 305 meters each, and boasts an aerodynamically shaped deck with inclined hangers. It was the first bridge in the world to incorporate these innovative features and was the longest span in England at the time of its completion. The viaduct is 156.5 meters long and consists of three spans made up of two box girders working together with the concrete slab.
As part of the First Severn Crossing for the M48 motorway, which was formerly the M4, it includes the Aust Viaduct, Severn Bridge, and Wye Viaduct. The bridge underwent strengthening and refurbishment from 1985 to 1991, which did not significantly alter its appearance. Recently, it was repainted white to alleviate thermal stress, a change from its original color but deemed successful.
Local climate
Severn Bridge and Aust Viaduct First Severn Crossing receives an average of 830 mm of rain a year. This makes it wetter than 54% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.
It experiences an average of 34 freeze-thaw cycles a year, fewer than 52% of listed buildings. Of these, 13 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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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 2 applications
- Detailed attributes — period, style, materials, features
- 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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