The Back wash tank slab

Shutters are Doka Framax with flexible joints to use on curved walls

The wash water holding tank

This pipe was a mission to place as the excavation was under water level

The ground was about 2 meters underwater when I started

Well points have been running 24/7 for about 4 weeks to lower the water level during slab construction

The Lime dosing pit

It's 6 mtrs deep

G.A.C. filters

Relift chambers, about 9 mtrs deep