​Dean Ash Construction

​Stormwater Detention - Middle Road, Boronia Heights, Qld


​​This large 135,000L stormwater detention system required multiple efficiencies in time and cost – located under a roadway, it was essential to ensure both a trafficable and anti-floatation system within a 24 hour timeframe.


  • ​Nine (9) x 15,000L precast tanks, provided as an inter-connectable Stormwater Detention System
  • Installed in five (5) hours and ten (10) minutes


  • ​Fully installed, by one-man crew, by 2:55pm
  • Trafficable by a fully loaded semi-trailer, based on the SM1600 traffic design load rating
  • Anti-floatation
  • Onsite efficiencies and project savings showing this solution to be more cost effective than a Bio Detention systems


  • Australian Tanks 15,000L (x 9) inter-connectable precast tanks
  • All penetrations, risers and access frames
  • All sealant supplied for installation
  • Extra Heavy Duty for up to SM1600 traffic design load ratings