Cedar Grove Pump Stations

Logan City Council

Cedar Grove, Queensland

Diona was engaged by Logan City Council to construct two separate sewerage pump stations as part of the Cedar Grove Sewerage Conveying Works.


Cedar Grove Pump Stations


Under the QLD Government’s Shaping SEQ South East Queensland Regional Plan 2017, the city of Logan’s south-west region is identified as a major hub for residential, commercial and industrial development. The region includes the Greater Flagstone Priority Development Area (PDA). The population of the area is projected to increase from 2,000 to more than 162,000 by ultimate development. As development progresses and the population increases in the PDA, additional critical infrastructure such as wastewater pipelines, treatment facilities and pump stations will be required. The adopted wastewater servicing strategy for the greater Flagstone PDA involves conveying wastewater from the Greater Flagstone PDA to a proposed WWTP at Cedar Grove. The conveyance system would be a series of pump stations, rising mains and gravity mains.

Diona simultaneously constructed two sewerage pump stations, SPS151 and SPS152 in Cedar Grove. The contract included all earthworks, civil, mechanical, pipework and reinstatement work for the two pump station facilities.

SPS151 Flagstonian Drive includes:

  • Initial earthworks (including approx. 1700m³ of fill)
  • Construction of wet-well (6 metre diameter, 12 metres deep)
  • Inlet pipework, and three inlet manholes (3 metre diameter)
  • Discharge pipework and flowmeter pit
  • 100 metres of overflow pipework
  • A range of other structures, slabs, pipes and conduits.

SPS152 Flinders Lake Drive includes:

  • Initial earthworks (approx. 5000m³ of fill)
  • Construction of new 300 metre access road
  • Construction of wet-well (6 metre diameter, 10 metres deep)
  • Inlet pipework, and three inlet manholes (3 metre diameter)
  • Discharge pipework and flowmeter pit
  • 200m of gravity sewer
  • A range of other structures, slabs, pipes and conduits.

During the project, numerous challenges have been encountered and successfully and safely overcome. One of the most challenging aspects of the project was excavating a 12-metre-deep excavation to install the pump station wet wells. Excavation footprints, plant capacity and lifting analysis, shoring pressure analysis, access and egress, along with thorough project planning, permitted these challenges to be successfully overcome.

Construction of a deep pump stations involves many high-risk works activities and safety has been the first priority at all times. Diona went above and beyond in the development of a safe workplace culture and high-risks tasks are being successfully completed thanks to thorough and detailed planning.

Key Services:

Awards:

  • Finalist: CCF QLD Earth Awards 2020 Project Value $5m - $10m category

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