We deliver projects that matter

Positively impacting clients and communities around the world
through the design, build and delivery of energy & engineering solutions.

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Mainline is a leading engineering solutions provider

Operating in Ireland, the UK and Scandinavia, we provide a wide range of services from the Design & Build of Sub-stations, to construction of Airside Aviation Infrastructure, to Turn-key Wind & Solar Energy Solutions.

Mainline has a robust corporate management structure, underpinned by our ISO 45001, 14001, 9001 and cyber essentials accreditations as well as our Platinum Member Deloitte Best Managed Company status.

DELIVERING PROJECTS THAT MATTER

ONGOING & RECENT PROJECTS

Markbygden Wind Farm Sweden - EBoP

Mainline are currently delivering a significant second Wind Farm project in Northern Sweden, Phases 1 & 2 of Markbygden Wind Farm, part of the overall 1,002 Turbine Markbygden cluster, close to Pitea.

Scope of work includes:

Full Electrical Design for Markbygden Wind Farm (Phases 1-3) for a total of 137 wind turbines c/w 680km of 36kV collector system.
Currently delivering Phases 1 & 2 EBoP works for 69 wind turbines comprising
Over 350km of MV cable,
Over 90km of associated Earthing conductor
Over 90km of telecoms fibre
Installation of cable jointing, terminations and testing/commissioning of the 36kV collector system
Wind turbine earthing installation for 69 wind turbines
Design, supply, installation and commissioning of 9 external Switching Stations all fitted with 36kV switchgear, protection and LV requirements.
Managing, liaising and coordinating on site activities

Hastkullen Wind Farm Sweden - EBoP

We are currently working in Northern Sweden, successfully delivering the 73 Wind Turbine Electrical Balance of Plant (EBoP) for Hästkullen Wind Farm, in the Nysäter wind park, close to Sundsvall. The scope of the project includes the following:

The engineering and construction (design, optimisation and build) of the 36kV Collector Cable to 73 wind turbines.
Over 95 km’s of associated civil works, trenching, and backfill, through a variety of terrains from wetlands to rock, including a number of directional drills.
Over 95 km’s of associated Earthing Conductor works.
Over 155km’s of fibre telecommunication works.
The installation, cable jointing, testing, commissioning and energisation of almost 455 linear km’s of 36kV cable.
Various additional civil works, including the construction of an Access Road.

Dublin Airport New North Runway – Full Electrical Package

The new North Runway project in Dublin Airport is the most substantial airfield project in Ireland for a long time, and upon completion it will become a vital piece of national infrastructure, significantly increasing the capacity of Dublin Airport. Mainline are the Lead Electrical Contractor on this large scale Aviation project, and our scope includes the supply and installation of the following:

Over 340km of primary cable in ducts adjacent to the runway
Over 135km of secondary cable (feeding each light)
Termination of primary and secondary cables
Over 2,500 Transformers in manholes
Over 28km of Fibre Optic Cable
Over 27km of MV Cable
Over 11km of 50 Pair Copper Telecoms Cable
Over 5 km of Earth Cable
Over 100 Runway/Taxiway signs
Over 1,800 shallow bases for Airfield Ground Lights
Over 2,200 aviation lights including:
- Runway lights
- Taxiway lights
- PAPI lights
- Approach lights
Complete fit-out of 2 substations including:
- Mechanical & Electrical fit-out
- HV Switchgear
- Circuit breakers
- HV Transformers
- Constant Current Regulators (CCRs)
- Back-up generators
- Distribution Boards
- Fire Suppression Systems
- Building Management Systems
- UPS’s
- Lighting protection Systems
- Security Systems

Ballycumber Wind Farm Ltd – EBoP & CBoP

Mainline completed the EBoP (Electrical Balance of Plant) & CBoP (Civil) works in 2019, the scope of the project included:

EBoP Substation Design and Build / Fit Out (IPP and ESBN stations)
Wind Farm and Grid Connection MV/HV Cables (Installation/Jointing/Testing)
Wind Farm and Grid Connection Fiber (Installation/Jointing/Testing)
Completion of the CBoP Works upon Termination of CBoP Main Contract (due to Examinership of the CBoP Contractor). CBoP Works included significant Substation, Wind Farm, Delivery Route and 38kV Grid Connection works.
Managing, liaising, co-ordination commissioning of the Sub-station with the ESB Networks (ESBN).
PSCS for all of the above.

Cork Non-domestic Water Metering – D&B and O&M

Mainline was the sole supplier to Cork County Council to design, build and install 20,000 non-domestic water meters in Cork. The Design & Build (D&B) contract was completed in 2010. In conjunction with this, Mainline Operates and Maintains (O&M) the 20,000 non-domestic water meters on behalf of Cork County Council / Irish Water. The O&M contract commenced in 2006 and continues until 2021. Under the O&M contract, we read, repair and maintain all 20,000 meters, as well as manage all other aspects of the water meter infrastructure, including identification of new Customers, surveying and new meter installations. The O&M project also deals with the capital replacement of the 20,000 installed meters, all of which were replaced between 2016 and 2019.