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We have experience drilling up to 1200mm dia. for utilities.

Advantages of Directional Drilling:

  • No environmental disruption as surfaces are not broken up or damaged to any great extent
  • Minimal traffic disruption
  • Approved methods for pipe laying from 25mm to 750mm diameter over 1km.
  • Fast turnaround.
  • Very economic for river crossings, railway crossings, highway crossing and roundabouts.

Utilities Uses:

This is the safest method of excavation around power cables and other utilities without the risk of damage to the utility or danger of injury to the operator.

 The excavated material is contained in the vehicle rather than deposited on the side of the trench which is important in confined spaces.

This method of excavation has been used extensively on the Dublin City Light Rail Service Diversions Project and is a safety requirement by many UK Utility Companies.

Recent job to vacuum excavate between multiple utility services for the Dublin Luas light rail project


Vacuum excavation is a non-invasive technology ideally suited for excavation work on sites where existing buried pipe, cable and other utilities are present.

The photographs below illustrate one of our vacuum excavators being used on the Dublin City Luas Utility Diversion Project, which was a complex undertaking to divert the myriad of utilities (water, gas, power, telecoms and sewer) to facilitate the new rail tracks.

Traditional methods of excavation can be cumbersome, messy, and potentially dangerous and could damage the very utilities you are trying to locate or repair.

Moling is a trenchless method used to lay pipes.

During the moling process, a pneumatically-driven machine known as a mole forces its way through the soil along the desired path of the pipe.

Moling avoids the need to dig a trench and can be used to lay pipes for water, gas and electricity.

Sizes from 20mm to 160mm.


Aurger boring under a main road in Co. Cork, Ireland. The purpose of the duct is carry the electrical cables for an ESB windfarm.

Auger Boring is a jack and bore trenchless method of installing pipe, generally steel. A pit is dug either side of the work area to allow for plant machinery used in the boring procedure. This method uses an Auger inside the steel casing, which reduces the likelihood of ground settlement from the excavation. As the Auger is drilling the excess soil is transferred out of the pipe and the steel pipe remains in situ . Once installed the next length of pipe is welded to the end and the process continues until all the pipe is installed. This method is a popular solution to install utilities where settlement is an issue, like railways, highways etc.

GMAC Utilities Ltd are setup to to install 323mm , 406mm , 508mm and 601mm pipe.



To compliment our Directional Drilling and trenchless techniques, we operate a range of automatic / semi-automatic fusion welders and electrofusion.

These include 6m/12m sticks and 100m coils of MDPE and HPPE pipes from 63mm to 600mm.

IMG 3696

This is a method of replacing existing defective metallic, plastic, clay or cement pipes with new PE Pipe, usually with the same or a larger diameter pipe.

Constructionline Gold Member Gmac Utilities Ltd has been assessed and has met the bronze level
requirements of the Fleet Operator Recognition Scheme
(FORS). GMAC Utilities Ltd Has achieved the following standards through assessment for Safety, Health,
Environmental & Quality practices and procedures as a registered supplier on Verify
Category B2

Gmac Utilities are currently working towards ISO accreditation