Abergeldie was engaged as head contractor to replace the Camp Street road bridge and pedestrian bridge over Lake Forbes. The project involved the complete demolition of both bridges and the construction of one new larger bridge comprising pedestrian and cyclist path.

Scope included:

  • Demolition of existing 60m long 2-lane concrete bridge over the Lake Forbes formed with 9 spans carried on the abutments and eight (8) RC trestle piers each with five (5) 360x360mm columns
  • Salvage heritage art deco light post
  • Construction of the new 70m bridge. The bridge comprises 10m spans which includes two 5m travel lanes (one in each direction), and 1.5m wide shoulders with a 4m wide shared path on one side and a 2m wide footway on the other
  • Construction of 18 driven 900mm diameter tubular steel pile casings with concrete infill to support abutments and piers
  • Construction of the 6 concrete piers
  • Construction of abutments curtainwalls, headstocks, and wingwalls
  • Supply and erection of precast pier skirts
  • Provide and install 19No prestressed precast concrete planks for each span (total 133 PSC planks)
  • Supply and install bearings
  • Construction of the cast-in place deck slab
  • Installation of precast reinforced concrete barriers on each side of the bridge
  • Construction of the approach slabs
  • Installation of bridge deck drainage
  • Rip rap rock scour protection
  • Provision and installation of new streetlighting and downlighting cablings and luminaires, Test and commission

Innovation and Complexity

Abergeldie self-performed the demolition works using a “cut and drag” technique for each of the bridge deck segments. with all environmental controls in place in the lake to avoid pollution of fauna/flora.

Community Benefits

The Camp Street bridge is the main access to Forbes town centre. A new, wider bridge significantly improves accessibility in and out of town. The new bridge also improves safety for pedestrians and cyclists.


Roads and Maritime Services

Current status: