Roads & Bridges

Mackay Hospital Bridge Replacement


Mackay Hospital Bridge Replacement

Project involved construction of a 550-metre 22-span concrete bridge over Pioneer River and a two-span concrete bridge over Lagoon Creek in Mackay.

Associated works included 3km of new approach roads and roundabout construction with bulk earthworks, drainage, landscaping, and pavements.

Pioneer River is tidal and of important ecological significance and feeds into the Basset Basin and Round Top Island National Park and Bakers Creek Conservation Park. It contains sensitive fauna and flora including dugongs, crocodiles, porpoises, fisheries, turtles, sea grass and mangroves. Environmental controls included:

  • Bunds to capture concrete overspill from the bridge piles
  • Geofabric “flags” were located around the ends of the construction platform bund secured to vertical star pickets that would wrap around the earth face of the bund end and provide protection from erosion from the swirling water movements
  • Sediment traps on the river banks
  • Rehabilitation of disturbed areas in advance of the wet season.

The project was completed one month ahead of program. Key to achieving this were innovations in construction methodology and plant selection, for example:

  • Building a sand access platform extending midway into the river, from which bridge construction activities could take place.
  • Introduction of a Cluster Hammer during the piling works to shatter the exceptionally hard rock, which could not be drilled and excavated by conventional means.

Level 10
580 St Kilda Rd
VIC 3004
P: 03 9692 7100

Ground Floor
85 McLachlan Ave
Rushcutters Bay
NSW 2011

Level 9
120 Edward St
QLD 4001
P: 07 3073 9093

Level 10
Australia Place
15-17 William St
WA 6000
PO Box Z5192
St Georges Terrace
WA 6831
P: 08 6229 3700
F: 08 6229 3750

45 Hope Valley Rd
Naval Base
WA 6165
PO Box 202
Kwinana WA 6966
P: 08 9410 2100
F: 08 9410 2387

475 Edward Rd
WA 6530
P: 08 9923 7000
F: 08 9923 7050

12 Kershaw Street
WA 6280