Harold Park – Civil and Associated works

Client: MIRVAC

Project Value: $74 Million

Works to this inner city historical site in the heart of Glebe included the provision of new sewer, stormwater and infrastructure works to accommodate future and current building demands on site. The works in the first instance involved site remediation to remove all traces of the site’s previous existence as a tip. The works extended to piling works, as a support for building foundations, road preparation and construction, shoring and shotcreting and the construction of extensive gabion retaining walls and complex bioswales.


  • Complete site remediation works in accordance with nominated Remediation Action Plan, including client and third-party auditing and submission to environmental protection authority and NSW land and environment.
  • Installation of new 100 year-life Sydney Water sewer infrastructure including under bore activities undertaken below water table level. Including Gross Pollutant Trap to suit 2.5m diameter line.
  • Installation of new 100 year-life Sydney Water stormwater infrastructure partially supported on pile and beam arrangement as a solution to the existing uncontrolled fill on site.
  • Connections into live Sydney Water sewer and stormwater assets directly feeding thousands of residents of neighbouring suburbs, Glebe and Forrest Lodge.
  • Cut to fill activities to accommodate present and future building requirements including the provision of a 3.8ha open space area to be made available to future residents.
  • Excavation of 335,000m3 of material, including 112,000m3 of sandstone
  • Environmental material testing and complete material tracking to end of life cycle
  • Export of sandstone surplus to onsite requirements, to other commercial projects for reuse.
  • Construction of structural gabion walls with aesthetically appealing architectural gabion facades and intricately detailed bioswale designs.
  • Lime stabilisation of sub-base materials in order to improve the CBR values and maximise the opportunity for reuse of existing onsite material for road construction.
  • Basement excavation combination of secant pile cut off wall and soldier pile and shotcrete retention systems in water charged ground.
  • Basement excavation including retention and foundation piling of 14 buildings. A range of piling techniques used such as secant pile cut off wall, soldier piles with shotcrete infill’s, contiguous piling and foundation piles for building and temporary crane foundations.
  • Site settlement issue resolved geotechnically with both preloading and Wick Drain techniques
  • Work in water charged ground