The upgrade of the Deep Creek Sewage Pump station was awarded the Engineers Australia Cairns Regional Engineering Awards Project of the Year 2017.
Known as Pump Station DC1 and located at Trinity Beach, the project was delivered by Cairns Regional Council and GHD.
After 25 years of operation, the pump station's internal structure had deteriorated to the point that a major refurbishment was required to save this valuable Council asset. It also required a general upgrade to cater for the next 25 years of population growth.
Council and GHD delivered a low-cost but complex solution to engineering challenges involving hydraulics, mechanical, structural and geotechnical elements. Work involved an existing structure 14 metres deep and cutting into live sewerage infrastructure.
To enable the pump station to be taken offline for the remedial works, GHD designed a semi-permanent bypass system that would limit the risk of a sewage overflow. The design team also developed systems to measure the materials being applied to the walls in order to achieve the correct thickness.
The project was completed on time and on budget, and the refurbished facility decreases sewer retention time, resulting in less odour generation. The additional semi-permanent bypass system can be used in future asset condition assessments.
According to the judges, the project has set a new benchmark in wet well rehabilitation.
The Cairns Regional Engineering Awards recognise and reward outstanding engineering projects and individual engineers. The Project Award showcases those projects that demonstrate engineering excellence and advance the profession by setting new benchmarks.