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Family business for four generations with over 70 years’ experience in drilling


Spanning four generations and over 70 years in business, we have grown and developed a wealth of knowledge and experience in well drilling, groundworks engineering, environmental and geothermal solutions.  We service the industrial, commercial, private and agricultural sectors. 


Martin Lenihan 1972. Today the business is carried on by Martin’s two sons and two grandsons.

Working the first drilling machine purchased in 1957 from the USA.



From the 50’s with one drilling machine, today’s operation is highly mechanised with five drilling rigs including a Hardab on tracks, teleporters, skid steers, excavators, artics, lowloaders, rigid trucks, vans, pumps and cameras.  All service and maintenance is carried out inhouse by our skilled team in a modern well-equipped workshop. 

Drilling has progressed in not only the machinery and equipment required but the demands and diversity in each sector plus the standards in safety and environmental regulations under which we operate.


Icon Diagram Lenihans


We have experience and a track record in drilling water wells in a wide range of situations from domestic homes to commercial farms and industries requiring thousands of gallons per hour.

The initial step is to conduct a feasibility study which will help us establish your requirements and study the site-specific information for ground and rock formation. This will enable us to help you make an informed decision on how or if to proceed to the next stage.


Demand for a quality water supply can be very high on farms, especially large dairy farms.  In many cases the saving in having a farms own water supply can lead to massive saving in public water rates.

An Agricultural water well can vary in size depending on the water demand. There are many factors that can effect this, including number of livestock, soil type, type of farming etc. Depending on requirements we can advise on bore hole size, water quality and testing, pump systems and storage.


A commercial supply is a large production well, typically used for businesses with high water demands, such as factories, hotels, sports facilities, group schemes etc.  The first step towards obtaining a commercial water supply is to contact us for a hydrogeological assessment. We will study the finding and assess your water demands.  Once this initial step has been carried out, we can then provide you with a detailed quotation for the drilling and servicing of the well, including a pumping capacity report, filtration if required and for the fitting of a suitable pumping system.


A domestic supply is a lower production well for one private property. Usually in a rural locations, where public water supplies are not available, water quality may be poor or the public water rates are considered too expensive.





We specialise in geothermal drilling. We have been drilling and installing vertical ground systems in various sized loops in diverse geological formations. 

We at Lenihan’s Drilling provide a professional and efficient service, using the latest equipment.

We supply and install a wide range of single and double loop PE100 SDR11 collectors, available in OD32 and OD40 in coil depths of 90mtr, 100mtr, 120mtr, 150mtr, 165mtr, 180mtr, 200mtr and 220mtr.



The initial study utilises high-quality site-centred Ordnance Survey historical mapping from the late nineteenth century to the present day, and comprehensive environmental database searches. This study determines if the site and surrounding area could have been subject to potentially contaminative use (thus creating potential liabilities) and gives preliminary information on other parameters such as radon concentration, vulnerability of watercourses, aquifers and public water supply abstractions. This phase can also include searches for coal workings, petroleum tank searches, and other relevant research areas, such as mineral studies.

This data is then collated to assess potential sources, pathways and receptors, culminating in a preliminary conceptual model and risk assessment.


Based upon our exact understanding of why a client requires investigation work, our engineering consultancy staff hone and scope our investigations to meet their objectives. Before carrying out intrusive investigation we undertake walkover surveys to confirm the sources and receptors (and likely pathways) identified in the Phase 1 study and subsequently adjust and finalise the exploratory hole locations accordingly.

Environmental site investigation often utilises the low-disturbance technique of dynamic sampling, as well as excavator-dug trial pits and cable percussion boreholes. Standpipes are often installed for the monitoring and sampling of groundwater and soil gases by our site technicians. On site monitoring can also include in-situ monitoring for water quality, as well as volatile vapours (e.g. petroleum hydrocarbons). Decontamination units can be deployed for use on contaminated sites falling under Category RED in contaminated land practises.

We have investigated sites with varied historical uses, including petrol stations, factories, abattoirs, landfills, timber treatment works, scrap yards and foundries. The proposed developments are again varied, with the most sensitive land use generally being residential.

At this phase we provide clients with interpretive reports that assess and advise on the risks to human health, vulnerability of groundwater and surface water resources, buried concrete & services, etc, and such work involves a final conceptual model and risk assessment. If significant risks to water resources are identified, then we can undertake a Detailed Quantitative Risk Assessment (DQRA)(referred to as an RTM, formerly P20). Our interpretive reports also give guidance on the classification of soils for off-site disposal (i.e. Initial Waste Characterisation & WAC tests), as well as any geotechnical aspects such as foundations and retaining walls.


Modern borehole cameras are pressure-tight (up to 50bar) and provide photos and videos of high quality from diverse points of view and are equipped with various measuring tools.  A water bore hole and well can be subject to deterioration with age. Over time this causes a reduction of the pump capacity due to sedimentary deposition.  To restore, the pump capacity wells (filter slots and filter gravel) can be cleaned and regenerated. An optical inspection helps to find the appropriate method of regeneration.


We install the correct pump system for your water needs. Whether it is the installation of a new pump system or service on an old pump system. We are fully stocked and ready to solve your water supply problems. We service all types of well pumps (submersible and jet pumps) and provide Emergency Service 24/7.


We at Lenihan’s Drilling will plan your water well project based on the specifics of your requirements and the site characteristics and location. Every site can have unique and specific requirements due to soil type, gradient, environmental regulations and safety standards. We allocate specialized equipment and prepare the site to the desired requirements prior to, during and post drilling. This will enable the job to be completed effectively and safely while meeting all environmental standards.




Here are a few of the businesses we have worked with in recent years.  

We also have a vast number of private clients who are the backbone of our business.



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