Constructive Thinking Experts

Representing another stage in Powerlink’s commitment to maintaining high voltage electricity supply to South East Queensland, Powerlink and Ergon Energy identified the need for a new 275kV transmission line between the Western Downs Substation and a newly constructed Columboola Substation.

Following on from our successful involvement in the Western Downs project, ALLROADS were awarded the contract to undertake all civil works for the new Columboola Substation from Managing Contractor, Downer Australia.

Works included: construction of switch yard, entrance road and platform, site clearing and earthworks including hard rock excavation, stormwater, and associated pits, excavation, lining and revegetation of diversion channel and earthgrid trenching for copper conductor. In addition to the original contract, ALLROADS were also requested to construct the internal roads and cover all platforms at the Wandoan Substation.

The project presented a number of challenges including strict environmental controls, in particular concerning the requirement for the relocation of a number of native fauna species and revegetation works.  This saw ALLROADS engage a specialist Environmental Consultant who worked with us to identify and implement the correct strategy to undertake these sensitive works.

Through close consultation with relevant specialists and adoption of a highly detailed environmental management plan, ALLROADS were able to overcome these challenges and deliver an end result on time, on budget and to the specifications of both Downer Australia and Powerlink.  

  • Over 12 hectares of site clearing including significant fauna relocation

  • 50,000m3 of earthworks including hard rock excavation

  • 25,000m3 of imported fill

  • 500m of stormwaters and associated pits

  • Construction of a 48,000m2 substation platform and internal road network

  • 300 lineal metre entrance road

  • 9,000 lineal metres of Earthgrid trenching required for copper conductor

  • Liaison with environment specialist and strict environmental controls required

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