This website has been designed to provide information on the Strategic Infrastructure Development application for a proposed 110 kV substation and 110kV Underground Grid Connection line (UGC) & associated works.  

The proposed development will be described in full as: 

Construction of an electrical infrastructure installation and associated underground grid connection (UGC) on lands within the townland of Great Island measuring approximately 2.58Ha./25812 square metres in overall area. The installation would consist of a 110kV tail-fed substation and underground grid connection measuring approximately 838m in overall length. The 110kV substation would consist of a 110kV transformer; house transformer; disconnect, individual current and voltage transformers, combined current/voltage transformer, surge arrestors; circuit breakers and cable sealing end; a blastwall measuring 8.00m in overall height; 4no. lightning masts measuring 18.00m in overall height; palisade fencing measuring 2.60m in overall height; pole-mounted security cameras and lamp posts.  An Eirgrid substation building with an overall footprint of approximately 180.00sqm and overall height of 8.21m would be located at the western end of the substation area. An IPP substation with an overall footprint of 132sqm and height of overall 7.33m would be located at the eastern end. The typical UGC installation would consist of standard ESB ducting details of the following 1no. trench (0.82m wide; 1.31m deep) measuring approximately 838m in overall length to carry 3no. 160mm power ducts and 2no. communication ducts and an ECC duct, connecting the proposed substation to an existing 110kV Eirgrid substation at Great Island.  The typical trefoil trench will need to be adapted to a flat formation to accommodate for any service crossings encountered along the route. A typical width of trench for a flat formation trench would be approx 1.60m with varying depths. A temporary construction compound would be constructed within the site boundary for construction phase of the development, after which it would be removed.  

Following consultations pursuant to Section 182E of the Planning & Development Act 2000 (as amended) (the Act), An Bord Pleanála determined that the proposed development is Strategic Infrastructure Development within the meaning of Section 182A of the Act, which necessitates a planning application being made directly to An Bord Pleanála.  

It is a requirement of An Bord Pleanála that the applicant creates a specific website to include all of the application documentation which can be publicly viewed/downloaded.  

 The 110kV substation, measuring 0.3Ha in overall area, would be sited at ground level of 16.00m ASL and would consist of the following infrastructure: 110kV transformer; House transformer; Disconnect; Individual current and voltage transformers; Combined current/voltage transformer; Surge arrestors; Circuit breakers; Cable sealing end; 4no. lightning masts measuring 18.00m in overall height. 2no. substations (Eirgrid and IPP) would be included in the substation compound. A blastwall measuring 8.00m in overall height located on the eastern side of 110kV transformer, between transformer and IPP substation. Ancillary development to the main substation infrastructure would include palisade fencing measuring 2.60m in overall height, pole-mounted security cameras and lamp posts.   

The underground grid connection would serve to connect an existing Eirgrid 110kV substation at the SSE Great Island Power Station to the proposed substation. Measuring approximately 838.00m in overall length. The connection would consist of 1 no. typical trefoil trench measuring approximately 0.82m wide and 1.31m m deep to house 3no. power ducts, 2no. communications ducts and 1 ecc duct.  A precast communications chamber measuring approximately 1.30m in length, 1.03m in width and 1.20m in height would be installed outside both substations. The UGC would be wholly on private land.  

The proposal is to facilitate the introduction of a Battery Energy Storage System on the transmission network. A separate 38kV system is also proposed for this Site, a planning application for which has been submitted to Wexford County Council (Planning Application Ref. 20231294).  

Thank you for taking the time to visit the Project Website.