RECO designed and supplied 540 lineal meters of TechSpan® reclaim and escape tunnels to Fortescue’s Cloudbreak mine in 2006/2007. The design was complex. The conical shaped iron ore stockpile above the tunnels reaches some 55m height above the crown of the arch (10m of backfill and 45m of very dense iron ore at 2.9 t/m³). This makes the Cloudbreak TechSpan® arch tunnels some of the most heavily loaded structures RECO has designed in Australia to date and one of the most heavily loaded structures RECO has undertaken anywhere in the world.