Essential Wastewater Solutions
In providing essential wastewater services, this project was pivotal in Logan City Council’s commitment to bolstering the sustainability and livability of rapidly growing communities within the Greater Flagstone Priority Development Area.
Project Overview
As part of the Cedar Grove Sewerage Conveying Works, Diona installed two new sewage pump stations and associated pipework. This new infrastructure will increase capacity of the wastewater network to cater for future growth in the region.
Project Need
Under the QLD Government’s Shaping South East Queensland Regional Plan 2017, Logan’s south-west region, notably the Greater Flagstone Priority Development Area (PDA), was earmarked for substantial residential, commercial, and industrial growth. With the projected population surge from 2,000 to over 162,000 residents, the demand for critical infrastructure such as wastewater pipelines, treatment facilities, and pump stations become imperative.
The proposed wastewater servicing strategy for the Greater Flagstone PDA entails conveying wastewater to a designated Wastewater Treatment Plant (WWTP) at Cedar Grove. This involves the establishment of a conveyance system comprising pump stations, rising mains, and gravity mains.
Project Solution
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, located at Flagstonian Drive, involved initial earthworks, approximately 1700m³ of fill, and the construction of a 6-metre diameter, 12-metre deep wet-well. It also included the installation of inlet pipework, three inlet manholes (each 3 metres in diameter), discharge pipework, a flowmeter pit, and 100 metres of overflow pipework.
Similarly, SPS152 at Flinders Lake Drive included initial earthworks totaling approximately 5000m³ of fill and the construction of a new 300-metre access road. This station featured a 6-metre diameter, 10-metre deep wet-well, inlet pipework, three inlet manholes (each 3 metres in diameter), discharge pipework, a flowmeter pit, and the installation of 200 metres of gravity sewer. Various other structures, slabs, pipes, and conduits were also part of the project’s scope.
Value Add | Benefit
Enhancing Project Delivery
A significant challenge within the project was excavating a 12-metre-deep area to install the pump station wet wells. This involved meticulous planning encompassing excavation footprints, plant capacity and lifting analysis, shoring pressure analysis, as well as considerations for access and egress. Despite these hurdles, the project team successfully navigated through these complexities.
Ensuring Safety
The construction of deep pump stations entails numerous high-risk activities, making safety paramount throughout the project. Diona’s commitment to fostering a culture of safety in the workplace went beyond standard protocols. Thanks to comprehensive planning and attention to detail, high-risk tasks were executed successfully, prioritising the well-being of all involved.
Key Aspects
- 2 pump stations (SPS151 and SPS152)
- SPS151 wet-well measuring 6 metres in diameter and 12 metres in depth
- SPS152 wet-well with a diameter of 6 metres and a depth of 10 metres
- 300 metre access road
- 6 inlet maintenance holes (3 metre diameter)
- 6700m³ of fill
- 200m of gravity sewer
- 100 metres of overflow pipework
- Discharge pipework and flowmeter pit
- A range of other structures, slabs, pipes and conduits
ESG Alignment
Under the QLD Government’s Shaping 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. This project supports this future development by enhancing the sewage infrastructure, which is essential for maintaining sanitation standards and managing wastewater effectively in a growing community.
Supplying waste management infrastructure is vital for upholding community sanitation standards and mitigating environmental risks.
This project contributes to the goal by enhancing the sewage infrastructure, which is essential for maintaining sanitation standards and managing wastewater effectively in a growing community.
The construction of advanced sewerage pump stations demonstrates a commitment to developing resilient infrastructure. It involves innovative engineering and construction techniques, especially considering the deep excavation work and the integration of these pump stations into the existing sewage system.
By ensuring the provision of essential sewage services in a rapidly growing area, the project contributes to making communities more sustainable and liveable. It supports urban development in the Greater Flagstone Priority Development Area by providing critical infrastructure needed for a growing population.
The successful completion of this project is a result of effective collaboration between Diona, Logan City Council, and the Queensland Government. This partnership aligns with the goal of strengthening the means of implementation and revitalising the global partnership for sustainable development.
