From Warminster And District Archive magazine, No.4, May 1990:
There are eleven bridges on the route of the Warminster Bypass, with a total tender value of £1.75 million. Together they contain 5,500 cubic metres of concrete and 760 tonnes of steel reinforcement. Three carry Bradley Road, Bishopstrow Road, and the Eastleigh Wood Bridleway over the Bypass. The other bridges take the Bypass over four farm accommodation roads, the B3095 Sutton Veny road, the Salisbury-Bath railway line, and two cross the River Wylye.
The bridges are all founded on reinforced concrete bases, except for the railway bridge near Cotley Hill and the River Wylye Bridge east of Butler’s Coombe, both of which are supported by 600mm diameter bored concrete piles.
The decks of the railway and river bridges are formed with pre-cast pre-stressed concrete ‘T’ beams which were supplied by Bryco Concrete of Taunton. The remaining bridges have in-situ reinforced concrete decks. The farm underpasses are simple reinforced concrete box structures.
The overbridges all have three spans which are continuous over the multiple column piers with movement joints at the skeletal abutments. The Eastleigh Wood bridge has a trough section deck reducing the height of the metal parapets which would have been required for the bridleway.
The B3095 Sutton Veny road underbridge has a 42 degree skew single span deck with buried type movement joints at each end and wing walls at two levels.
The river bridge at Norton Bavant has three spans which are simply supported, having buried type movement joints over the solid piers and at the skeletal abutments. This bridge was constructed adjacent to the original river course prior to diverting the river beneath the centre to keep the span length to a minimum. The bridges over the river at Norton Bavant and east of Butler’s Coombe also cater for farm accommodation roads and public footpaths.
The railway bridge is similar to the Norton River Bridge but has solid reinforced concrete parapets. All bridge construction over and adjacent to the railway line was carried out during weekend night-time possession periods. The construction team included two female engineers, Hilary Walton and Joan Wingfield. The pre-stressed beams for Cotley Bridge were all placed in a single night to minimise the disruption to rail traffic.