Creative Solutions to as Steep Problem


  • Custom built
  • Tanks too long to transport
  • Deep tanks facing prohibitive pressure

When original plans included tanks that would be too long to be safely transported, and buried so deep there was risk of tank damage, APD had the right solution. Nga Tapuwae School needed to detain up to 80,000L of storm water but the site they had available was long and narrow with a very steep slope.

Our Task

APD were asked to provide tanks for the school but there were two issues:

  1. The original plan called for two 36m long tanks – these couldn’t be safely shipped in one piece and welding onsite would take a lot longer and cost more.
  2. The site for the tanks had a 3 meter drop off – one of the tanks would end up 1.2m underground and would face pressures that would damage a standard tank.