The bridge at River Gowy carries the bi-directional Castleford to Dee Marsh line as it crosses the main river channel and the adjacent flood plain. The structure has two independent spans which share a common pier, one of 12m and the other of 5m.
Crouch Waterfall and Barhale Construction were commissioned by Network Rail LNW to design and build replacement decks for the structure, using the existing substructure. A composite U-deck was designed using Eurocodes for the main span, resulting in an improvement in headroom and a safe cess areas.
The smaller span was designed as an alternative to the conforming tender as a precast concrete U-deck which provided a more cost effective solution whilst the increase in deck weight could be accommodated using the crane capacity required for the erection of the main span. Bespoke precast cill units were designed on the common pier and either abutment to provide suitable load transfer to the existing abutments and retain ballast.
Crouch Waterfall also designed the temporary works for the schemes including a piled foundation to allow the 500 tonne crane to lift the bridges from a flood plain.