StormwaterEducationStormwater detention/retention EcoBloc
665 m³ detention replacing concrete tanks in Mackay
EcoBloc eliminated crane lifts and regional freight costs for a new Catholic college.
Woollam Constructions · Mackay, QLD
665 m³
Combined OSD volume
1 week
Install per tank
0 cranes
Heavy machinery
Project data
- Location
- Mackay, QLD
- Region
- Australia
- Sector
- Education
- Solution
- Stormwater detention/retention
- Product
- EcoBloc
- Source
- GRAF Australia
- Purpose
- Onsite stormwater detention
- Volume
- 396 m³ + 269 m³
- Dimensions
- 45 m × 10 m and 39 m × 7.2 m
- Cover
- 300 mm
- Contractor
- Australia Wide Lining
01
Challenge
South Mackay Catholic College needed two large OSD tanks beneath new classrooms and carparks, but specified modular concrete tanks carried punishing freight costs to regional Queensland.
02
Solution
GRAF replaced the concrete spec with stackable EcoBloc tanks in partnership with Australia Wide Lining. No cranes on site. Both tanks achieved required volume, levels and traffic loading.
03
Outcomes
- 665 m³ across two tanks (396 + 269 m³)
- One week install per tank with no heavy machinery
- 30 to 40% saving versus concrete alternative
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665 m³ detention replacing concrete tanks in Mackay