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Beneath Margate’s residential streets is a network of stormwater drains that most people rarely think about until heavy rain arrives. Around Cox Street, improving that network has been a long-running undertaking, involving several streets between the inland neighbourhood and the foreshore.
The Cox Street Drainage Upgrade has now earned a major engineering award, winning the $2 million to $5 million project category at the Institute of Public Works Engineering Australasia Queensland and Northern Territory Awards in October 2026.
The recognition follows years of planning and construction aimed at addressing drainage constraints in one of the Redcliffe Peninsula’s established residential neighbourhoods.
The Challenges Beneath Margate’s Streets
Drainage around Cox Street has presented difficulties for years, partly because of how the neighbourhood developed around a natural drainage corridor.
Earlier council investigations identified limitations in the existing stormwater system, the elevated road profile of Oxley Avenue and development within the drainage corridor as factors affecting the movement of rainwater through the area.
Although the land generally slopes eastwards towards Moreton Bay, stormwater must pass through a series of drainage lines and road crossings before reaching the foreshore. Where those connections have insufficient capacity, heavy rainfall can leave water accumulating in low-lying areas or travelling across road surfaces.
Council’s investigations extended beyond Cox Street, identifying improvements involving Duffield Road, Oxley Avenue, Mabel Street and Margate Parade.
Working within an established neighbourhood also meant accommodating existing roads, homes and underground services. The project was intended to address drainage limitations while providing infrastructure to support development within the designated drainage investigation area.
A Long Road to the Finished Upgrade
The first major construction stage dates back to February 2019, when council awarded a $3.46 million contract, excluding GST, to CES Civil.
That stage concentrated on Mabel Street, the drainage crossing beneath Margate Parade and the stormwater outlet to Moreton Bay. Council estimated the overall first-stage cost at approximately $3.83 million, including contingency and associated charges.
The later stage brought the programme farther inland, covering Cox Street, Duffield Road and Oxley Avenue.
In its July–August 2025 community newsletter, council advised that construction would begin in July, with completion anticipated around January 2026, subject to weather. Residents were also informed of possible temporary changes to traffic movements and property access during the works.
By October 2026, the project was being recognised for its contribution to flood resilience, with City of Moreton Bay describing the upgrade as an engineering achievement delivered within a constrained urban environment.
The award announcement did not specify the final construction completion date or the combined expenditure across both stages.
Flood Resilience Beyond the Award
For households in the Cox Street catchment, the practical importance of the upgrade lies in the capacity of the drainage system to handle stormwater during heavy rainfall.
Improving that capacity can help reduce pressure on streets and properties where the previous network had limitations. It does not eliminate the possibility of flooding, particularly during intense rainfall that exceeds the system’s design capacity.
Council’s October announcement did not include a quantified assessment of flood reductions following construction, so the extent of any improvement in individual streets or properties has not been publicly established through that announcement.
The engineering award nevertheless draws attention to an infrastructure project that has received relatively little public attention despite its lengthy history.
With the major works now recognised at a state-level engineering event, the remaining question for the Cox Street neighbourhood is how the upgraded drainage system will perform during future periods of sustained or intense rainfall.
Published 6-Nov-2026
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