Winterbrook Bridge, also known as Wallingford By-pass Bridge, was built in 1993 as part of a by-pass around Wallingford, Oxfordshire, relieving the single-lane Wallingford Bridge. It forms part of the A4130, connecting Winterbrook, at the north end of Cholsey, just south of Wallingford, on the west bank to Mongewell on the east bank. It crosses the Thames on the reach between Cleeve Lock and Benson Lock. The 55-metre (180 ft) three-span bridge is built of steel plate girders with a reinforced concrete deck slab and glass fibre reinforced plastic cladding on the underside.

During the construction, the remains of a late Bronze Age settlement on a former eyot were investigated on the west bank of the Thames. The bridge was designed so as not to disturb the archaeological site. Close to the east bank, near Mongewell, the construction work allowed examination of the South Oxfordshire Grim's Ditch, the long earthwork followed by the Ridgeway Path, and showed it to be late Iron Age/early Roman.

• Crossings of the River Thames

• Cromarty, A.M., Barclay, A. Lambrick, G and Robinson, M. (2005) Archaeology of the Wallingford Bypass, 1986-92: Late Bronze Age Ritual and Habitation on a Thames Eyot at Whitecross Farm, Wallingford, Oxford : Oxbow Books, ISBN 0-947816-67-4
• McKenzie, M. (1997) The Corrosivity of the Environment Inside Oxfordshire County Council Bridge Enclosures, unpubl. Project Report PR/CE/67/97, TRL, Crowthorne, UK
• Peshkam, V. and Banks, W.M. (1996) "Design, analysis and testing of Winterbrook Bridge composite enclosure", in: Saadatmanesh, H., Ehsani, E.R and Ehsani, M.R. (Eds), First International Conference on Composites in Infrastructure, University of Arizona, Tucson, p. 929–943
• Ryall, M.J. (2001) Bridge Management, Butterworth-Heinemann, ISBN 0-7506-5077-X, p. 294

• Wallingford History Gateway

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Wallingford Bridge	Winterbrook Bridge	Moulsford Railway Bridge