There are many reasons to drill for water; be it the rising cost of a mains water, remote distance from a mains water supply, or an unreliable and contaminated shallow well. Whatever the reason, WB+AD Morgan have the capacity and resources to service the requirement.
WB+AD Morgan have extensive experience of working with public water supply companies, bottled water producers, farmers, and companies requiring a private water supply for their own production processes.
High volume users such as these benefit from major savings:
- Arable farms
- Dairy farms
- Food processors
- Golf courses and sports grounds
- Soft drinks
- Water bottling
- Access to an independent prognosis report (hydrogeological survey) – allowing an informed decision on the success of the project to be evaluated
- Huge cost saving opportunities following installation – frequently cutting costs by up to 80%
- Rapid return on investment
- Extension service to assist with maintenance of the borehole
Drilling for water – an explanation
During drilling operations, and in constructing the well itself, it is important to ensure that the aquifer – the underground store of water – does not become polluted.
This is reinforced by the fact that EC directives, and provisions in the new Food Act, require that water used for irrigating certain crops has strict standards of purity.
To guard your water supply, WB+AD Morgan work to best industry practice, taking great care in the way engineering work is conducted, and use only safe, non-toxic materials within the borehole.
After drilling to the required depth, the borehole is lined with a well screen and casing, usually made of thermo-plastic, or stainless steel if required. Screens are precision cut to allow the full potential of the aquifer to be utilised. The screen design is engineered so that water entrance velocity is minimised—this means that any tendency to draw in sediment as water is being drawn is reduced.
The annulus around the screen is then packed with a rounded inert silica gravel or sand, acting as a filter.
Towards the top of the borehole, resting on the silica gravel or sand, a cement grout extends to the surface to close the annulus. This extends the full length of the ‘overburden’—loosely described as soil or broken ground—down as far as the impermeable layer, to a minimum depth of 3m into a competent rock-head. Its purpose is to prevent surface water, which may be polluted, entering the borehole.
Finally, a reliable stainless steel submersible pump is lowered into the borehole, which brings water to the surface under pressure. At this point a water sample is taken for laboratory analysis. Should filtration be required WB+AD Morgan will install suitable equipment.