Groundwater Control System (GWC)

Groundwater quality is affected by what happens on the ground above. Malcolm Drilling was hired to design and install a Groundwater Control System (GWC) to minimize groundwater flows during the placement of multiple concrete structures.  The intent of the Groundwater Control System (GWC), is to drawdown and maintain the groundwater 35’ below the existing grade until the new structures’ concrete weight overcomes the hydrostatic uplift forces.  We utilized the sonic drill for in-situ soil samples to be taken and classified by a subcontracted geologist, while each well was installed.  The samples provided the depth to which granular material was encountered so that the wellpoint screens could target that interface.  We then fuse the header pipe and maintain the system.