237011Granted
Tds. of Milltown & Coolyhenan,
Extension of permission for planning ref 12/1002: an electrical transmission substation and associated infrastructure and works, within and adjacent to the site of the existing 220/110kV Killonan substation. The development consists of (1) construction of a 220kV Gas Insulated Switchgear (GIS) substation building, of 1,856m2 gross floor area, with a maximum height of approximately 14 metres above ground level, (2) construction of a 110kV GIS substation building of 1,642m2 gross floor area, with a maximum height of approximately 12.5 metres above ground level, (3) construction of associated and ancillary outdoor electrical equipment and other apparatus; construction of three lightning masts of approximately 18.4 metres in height; internal access road, car parking areas, boundary treatment, associated drainage and site development works, (4) associated transfer of circuits from the existing 220/110kV Air Insulated Switchgear (AIS) substation to the proposed GIS substation, (5) construction of six 110kV end masts to facilitate connection of the existing overhead line transmission circuits to the proposed substation equipment by way of underground cable connections. These end masts will replace six existing end masts which are located within the existing ESB Killonan site. Two of the six end masts will be located adjacent to, but outside the western and southern boundaries of the existing substation complex. One of these two end masts will be located in the townland of Coolyhenan, the other will be in the townland of Milltown. The remaining 4 end masts and all other proposed works are located within the existing ESB Killonan substation in the townland of Milltown. The proposed end masts will measure up to a maximum of 21.5metres in height and will be of a similar form, scale and character to those existing and (6) all associated site development works (this application is for a 10 year permission)Decision record indexedDecision21 June 2023View record