Forgan Bridge Duplication

Forgan Bridge across the Pioneer River in Mackay, was first opened in 1938 by the then Premier of Queensland and Member for Mackay, William Forgan-Smith. The bridge provides direct access to Mackay's central business district from the northern suburbs.

Forgan Bridge had undergone significant maintenance over the years including underpinning and widening in 1979 and girder repair work more recently. Increased traffic volumes brought about by Mackay's rapid population growth and expansion of the northern suburbs of the city, has seen the original bridge reach peak capacity and nearing the end of its' design life.

The condition of the old bridge combined with carrying approximately 30,000 vehicles per day, with an anticipation of increase to 35,000 by 2015, warranted a case for the replacement of Forgan Bridge. It was recommended that Forgan Bridge be replaced with a four-lane structure.

Options included replacing the existing bridge alignment and adding two lanes, or the construction of a completely new bridge. It was concluded that the four lanes on the existing Forgan Bridge alignment would be the preferable solution.

The project would involve the design and construction of

  • List1 a new 4 lane, 486m long/18 span bridge, as a replacement to the original two lane structure
  • List2 a 6 lane, 76m long/4 span replacement for the Barnes Creek Bridge
  • List3 the design and construction of a 1.5km long 4 lane carriageway, from River Street on the southern side of Pioneer River to the Kooyong intersection on the northern bank, including relevant intersection upgrades.

GHD were commissioned as part of a team in an Early Contractor Involvement (ECI) Agreement in March 2007 by Main Roads, to provide the design elements of bridges, civil works, roads and intersections and environmental approval submissions.

In order for the City of Mackay to remain connected over the Pioneer River, the project would be completed in stages.

In April 2010 Mackay residents were able to farewell the old Forgan Bridge and welcome the first stage of completion of the Forgan Bridge Duplication Project. The second stage of construction is currently underway.

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