Robina Central: End-to-End Stormwater Solutions & The SPEL Megavault

Located on the Gold Coast, Robina Central is a new mixed-use development on Laver Drive – just a stone’s throw from the nearby M1 motorway. A high-traffic area that will see use as a local hub, new amenities for the area include retail premises and a service station.

SPEL designed an end-to-end stormwater treatment solution to meet the site’s diverse requirements, including gross pollutant and hydrocarbon capture, stormwater detention, and tertiary filtration. Approached sustainably, these assets were designed to match the sizeable 316,000-litre volume requirements for on-site detention – without sacrificing treatment capability.

Our goal was to offer a stormwater treatment train that protects the local environment, ensures pollution capture, and helps to mitigate flooding across the site. With a condensed footprint available on-site, these stormwater assets meet these size constraints and supply high-performance pollution removal.

SPEL Megavault: An Efficient Design Approach to Large Detention Scenarios

The SPELMegavault is the latest in our range of on-site stormwater detention tanks. The modular design of the Megavault, and its innovative pillar system, ensures scalability for medium to large detention scenarios.

With no internal walls and off-site precast fabrication, the design of the SPEL Megavault provides cost efficiency and easy on-site handling compared to block and slab solutions. Optimised to suit available volume and footprint, it is a versatile approach to flood mitigation and detention that can be tailored to fit site requirements. Despite wet conditions on-site, installation of the Megavault was completed within 2 days. Quick assembly ensured less open excavation time and allowed prompt backfilling. Importantly, the Megavault will retain full trafficability over its placement under the forecourt – an essential benefit for installation in a busy service station. The service station will also require hydrocarbon capture and tertiary filtration to meet its water quality requirements. Stormwater infrastructure will help to mitigate the contamination of the surrounding environment, and subsequent waterways, by hydrocarbons and other pollutants.

A full retention separator, the SPEL Puraceptor, was installed to handle oil and water separation. These units guarantee hydrocarbon capture in all flow conditions – which will contain oil and petrol in stormwater runoff. This unit is appropriately sized to provide safety and environmental compliance in case of an on-site fuel spill or storm event.

The end-to-end stormwater treatment also incorporated SPELFilters to ensure water quality outcomes were met. As the final stage of stormwater treatment, these cartridge filters can be added to detention systems to remove pollutants, such as total suspended solids (TSS), total phosphorous (TP), and total nitrogen (TN).

The result is a comprehensive stormwater treatment system that incorporates the diverse environmental requirements of the development – helping to future-proof the site\’s environmental impacts and mitigate local flooding.

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