A2 Limavady Bypass - Bridges

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The bypass contract included three bridges. Bridges over the River Roe and River Curly were the first integral bridges constructed in Ireland. Lightweight polystyrene was installed either side of the River Curly bridge to reduce embankment loads on the approach to the bridge. Top down construction was employed to simplify the construction of the Dowland Road bridge.

River Roe Bridge

Carrying the bypass over the River Roe:

  • 40 metre span
  • integral construction
  • steel piled foundation
  • composite steel concrete deck

Steel piles and shear connectors
Steel piles and shear connectors

Installing end sections of deck beams
Installing end sections of deck beams

Installing centre section of deck beams
Installing centre section of deck beams

Dowland Road Bridge

Carrying Dowland Road over the bypass:

  • 32 metre span
  • integral construction
  • continuous flight auger piled foundation
  • composite steel concrete deck

Installing piles
Installing piles

Steel deck grillage
Steel deck grillage

River Curly Bridge

Carrying Killane Link over the River Curly:

  • 25 metre span
  • integral construction
  • steel piled foundation
  • composite steel concrete deck

Updated 6 August 2015

Joining steel pile sections
Joining steel pile sections

Lightweight polystyrene fill behind abutments
Lightweight polystyrene fill behind abutments

Lightweight polystyrene fill behind abutments
Lightweight polystyrene fill behind abutments

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