As the venture was Queensland’s largest road infrastructure project with an intrinsic sustainability focus, there were stringent criteria around selecting a product, supplier, and applicator to deliver the erosion and sediment control works, incorporating 1,000,000m2+ of a long-term, self-sustaining revegetation solution.
There was a robust evaluation process to identify best value, whole of life revegetation solutions. Clearly defined key sustainability indicators (KSIs) required evidence-based reporting to achieve set performance standards that must be met and ideally exceeded. This project mandated sustainability implementation in line with continuous improvement principles. With this strong focus on continuous improvement principles, the comparison and analysis of product data was required to withstand independent verification.
In addition, the CR2SM project required the selected revegetation solution to be incorporated into a complex and staged works programme. It was vital to maintain active transport corridors throughout the life of the project, to meet community expectations and to ensure that commerce and critical services could continue with minimal disruption. Therefore, it was essential that the specified revegetation solution could be delivered within set timeframes with minimal delays for this project.
Environmental management considerations were critical to ensure that receiving environments were protected and legislative discharge standards were consistently met. Due to the significant average annual rainfall across the Sunshine Coast region, (average 1000mm per annum), it was critical that staged revegetation processes were undertaken. Regular stabilisation works were required to ensure that rain impact erosion and sediment laden discharge did not add to the project workload, create delays through rework, nor result in a negative environmental impact.
During dry periods, ground cover was required to minimise fugitive dust emissions from freshly topsoiled areas. A bonded fibre matrix or equivalent product was required to maintain moisture levels within the soil to ensure a long-term vegetated finish was achieved.
The revegetation solution had clear requirements to support the establishment of cover crops with varying seed specifications across the project. This specified seed blend included native seed species known to have poor strike rates if environmental conditions do not fall within a narrow spectrum.
Following a robust selection process, VE Gro-Matt was chosen as the revegetation solution. Manufactured in Queensland from reclaimed and sustainably sourced Australian waste timbers, VE Gro-Matt provided a sustainable revegetation solution with the ability to deliver on best value principles. Vital Chemical’s team of skilled applicators were selected to install VE Gro-Matt. The turnkey revegetation works package delivered by Vital Chemical comprising VE Gro-Matt product and installation, supported the sustainable procurement objectives of the CR2SM project.
The bio-contaminant free, heat-treated wood fibres comprising VE Gro-Matt, in combination with natural tackifiers, Vital Chemical’s proprietary soil binders, and site-specific soil enrichment mediums were installed with specified, native, local seed blends. This revegetation solution formed the foundation of the project’s grassing works programme, providing immediate point source, rain-fast ground cover whilst delivering optimum seedbed conditions. VE Gro-Matt afforded progressive and self-sustaining vegetated finishes across the project corridors and wider landscaped areas.
The abundance of site water due high seasonal rainfall allowed the opportunity for the CR2SM project to demonstrate innovative and sustainable water supply sourcing. Site water was treated to reduce sediment and nutrient loads in High Efficiency Sediment (HES) Basins before being safely stored onsite. The CR2SM project reused site water to minimise potable water use across vegetation watering programmes. Irrigation with reclaimed site water to VE Gro-Matt applied areas, promoted sustained vegetation growth during periods of dry weather, enabling the project to exceed key sustainability outcomes.
VE Gro-Matt provided ideal growing conditions, resulting in the delivery of immediate stabilisation whilst establishing a sustainable growth medium.
Clear and demonstrable benefits are consistently being exhibited as the CR2SM project continues to exceed expectations in relation to several KSI, including:
Energy & Carbon
Green Infrastructure Plan
“From early engagement with the Vital team, a collaborative solution-based focus allowed the project to achieve success within the landscaping program. The Vital team has worked closely with the project to meet not only the high environmental requirements, but safety, quality and importantly overall sustainability outcomes.”
FULTON HOGAN SEYMOUR WHYTE JOINT VENTURE
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