The ZJW team worked with South East Water, and its specialist re-lining sub-contractor Interflow, to deliver a high risk operational renewal project extending the life of existing assets at the treatment plant. This will enable a more sustainable water future for the growing communities in the Mornington Peninsula region.
The Mt Martha WRP was commissioned in 1978 and now treats sewage for over 75,000 people protecting the health of its communities. This pocket of the Mornington Peninsula is somewhat isolated from the larger South East Water network, making the WRP especially important. Corrosion rehabilitation works of the inlet pipe were necessary, along with associated access structures, for the long-term operation of the plant. The technical complexity of the remediation was compounded by the high-risk nature of the required bypass pumping to enable the works to be completed whilst the plant was in full operation.
Norman Walker, Design Manager for the ZJW team and Technical Executive at WSP says, “The Mt Martha WRP Inlet Rehabilitation project was important to the continued operation of this system and in supporting future generations within the Mornington Peninsula region. We are proud to be part of this collaborative team who had South East Water and their customers top of mind in every step and decision to deliver a successful and safe outcome for all. Well done to the team for winning another CCF Award for the second year running.
“Our team contributed to developing a detailed design, developing and implementing a complex bypass plan including redundancies as well as investigating and diagnosing concrete corrosion and challenged the status quo with new technologies of remediation techniques. The work was particularly complex given it was mostly undertaken within tight confines of existing manholes and within an operating treatment plant. The safety of our team and communities remained our top priority.”
The site posed many environmental considerations in protecting surrounding native trees and vegetation. Norman adds, “Given all of the project works were completed on live sewer assets and a major bypass was in place for 30 days, this compounded the risk of sewer spills which were never realised due to the team’s dedication to design and planning.”
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