Dewatering Methods

Well Pointing

Wellpoints are essentially shallow wells which offer an economical and effective method of groundwater control. Our wellpoints have the advantage of being able to be installed in most ground conditions as well as being easy to maintain.

Deep Wells

Deep well systems consist of an array of bored wells pumped by submersible pumps. The wells act in concert - the interaction between the cone of drawdown created by each well results in groundwater lowering over a wide area.

Ejectors

Ejector pumping utilises the "venturi effect" in water as the pumping mechanism. A volume of water at high pressure provides the motive force at the eductor body which incorporates the venturi mechanism, this system is particularly suitable to low-flow pumping systems.

Pressure Relief Wells

Pressure Relief Wells can be a cost-effective means of depressurising ground conditions beneath an excavation by creating a preferential pathway for any groundwater up-flow. Typically pressure relief wells are drilling through the base of an excavation, with the bore backfilled with gravel.

Regulatory Position

Dewatering operations by their very nature involves the abstraction of groundwater and in turn the discharge of this abstracted water. Since 2018 there have been changes regarding both abstraction and discharge regulatory arrangements.

Well Pointing

Deep Wells

Ejectors

Pressure Relief Wells

Regulatory Position

Accreditations and Associations