East Derwent Highway Structural

The Project: The structural portion of upgrading the East Derwent Highway at Geilston Bay

Client: Department of State Growth

Value: Bridge portion $2M, DN1650 pits and pipework $1.5M

Construction Period: March 2021–

Location: Geilston Bay, Golf Links Rd to Sugarloaf Rd (Bridge portion: Faggs Gully Creek)

Superintendent’s Representative: Nicolas Dwyer (Pitt & Sherry)

Project Manager: Adam McKeown

Project Engineer: Alyssa Marmion

Project Foreman (Structures): Gerald Churchill



Scope of Works: 
• A 22m long new twin box-culvert bridge (36 individual precast crown units) in Faggs Gully Creek to allow for the extension of the Dumbarton Drive road network. A water diversion pipe was installed to allow construction on creek bed as well as prevent pollution of the waterway
• The existing 1950s twin box culvert Bridge 44 under the East Derwent Highway was extended on both ends (32 individual precast crown units on the downstream, 44 individual units on the upstream) requiring a new structural slab to be connected to the existing via a construction joint
• Significant variation works were added to the contract by the client, including the construction of 150m of new DN1650 pipeline with two custom insitu pits (custom pit 1 at 5.9m deep and custom pit 2 at 3.5m deep) completed in lifts to allow parallel installation of the pipeworks

The project included:

  • In-situ concrete works and positioning of precast concrete units
  • Complex steel tying and formwork construction
  • Management of environmentally sensitive areas during construction
  • Planning of works to minimise high risk and confined space safety hazards

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