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An Bord Pleanála Inspector’s Report Reference: PL08.VA0007 Title: Development of a new 220/110KV substation with associated works including the removal of 220/110 overhead lines and their replacement by a reduced number of lines plus underground cabling. Location: Kilpaddogue, Tarbert, County Kerry Applicant: Eirgrid Observers: Kerry County Council; DoAHG; Michael Mulvihill; NRA; Tarbert Development Association. Planning Authority: Kerry County Council Date of Site Visit: 23 rd May 2011 Inspector: Philip Davis PL08.VA0007 An Bord Pleanála Page 1 of 24 1. Introduction This is an application for the construction of a 220/110kV substation on an agricultural field in Kilpaddogue, Tarbert, Co. Kerry, along with ancillary works that include the removal of existing overhead power lines and their replacement with a smaller number of such lines, in addition to a permanent access road. The application has been made under Section 182A of the Strategic Infrastructure Act 2006 as amended. 2. Site Description Photographs of the site and environs are attached in the appendix to this report. Kilpaddogue, Tarbert, Co. Kerry Kilpaddogue townland is located on the northern side of a ridge running parallel to the Shannon Estuary in north County Kerry close to the border with Limerick. It is predominantly rural in nature, with one occupied dwelling overlooking the area, and a number of derelict cottages elsewhere. The most prominent artificial features of the area are a series of three overhead power lines running west-south-west across the top of the ridge. The townland is subdivided into medium sized grazing fields, bounded by ditches and high hedges. A number of the fields appear to have been abandoned and are becoming overgrown with scrub. The ridge drops some 50 metres at its highpoint to the coast in approximately 800 metres. One minor third class road runs from the south over the ridge, running west just over the high point of the ridge to serve a dwelling. From the point where this minor road turns west an unpaved track runs north downhill to the coast, terminating at a small parking area at the rocky foreshore. The coast is marked by low boulder clay cliffs, between about 2 to 4 metres in height, with the foreshore a mix of exposed limestone and rocky storm beaches. Tarbert Island (connected to the mainland by a causeway and bridge), with its large, prominent power station (now disused), lies some 2-km east-north-east of the proposed substation site. On the mainland and west of the island are four very large oil storage tanks along the shore, with an overgrown and disused star-shaped fort on a bluff overlooking the island. The nearest settlement is Tarbert village, some 1.5 km to the south-east and on the opposite side of the ridge. This village has a number of local services and a population of approximately 800. The closest part of the town is on the third class road (L1010) that runs due west from the town, which is fronted with a linear sprawl of bungalows, some commercial uses, and a school, running for approximately 500 metres from the junction with the R551 (Listowel Road) and N69 (coast road to Limerick and connecting to the Tarbert Ferry) The site and environs The site for the substation (the overall works, including the alteration to overhead lines, includes a substantial part of the townland), is an area of small, roughly rectangular shaped series of fields close to the coastline. It is some 260 metres in PL08.VA0007 An Bord Pleanála Page 2 of 24 length from north to south and 200 metres in width. It rises approximately 20 metres in level from the cliff edge at the coast to the north to its southern extent. The site incorporates some ditches, overgrown hedgerows, and grassland turning to a rich scrub. The underlying geology seems to be primarily boulder clay. At the northern end of the site is a cliff of somewhere between 5 to 7 metres in height next to the rocky foreshore, looking north towards County Clare, some 2.4 km over the Shannon Estuary. The most prominent visible feature on the far shore is the Moneypoint power station, nearly 3km to the north-west. West of the site, along the shore, are a long series of fields used for grazing and meadow. 500 metres along the coast is a shallow valley with a small stream discharging to the bay. Further along, approximately 1.5 km along the shore is the small headland of Ardmore. There are no dwellings or roads accessing the coast along this section. South of the site, the land rises steadily to a high point on the ride of 57 metres AOD, some 400 metres from the edge of the substation site. There is a cluster of abandoned farm buildings approximately 120 metres south of the site. Three 220kV lines (part of the overall application area) run along the ridge at this point. The proposed access to the site also runs south up and over the ridge. After approximately another 300 metres, the ridge drops down to the 30 metre AOD contour, where a third class road (L1010) runs west from Tarbert. There is an intermittent linear sprawl of dwellings along the road, in addition to a school some 1 km to the south-south-east of the site. To the south-east of the site, there are two dwellings, one apparently abandoned, the nearest some 400 metres from the edge of the substation height. These are linked to Tarbert via a private road linking to a minor road that links the village to the coast. The centre of Tarbert Village is approximately 1.5 km to the north-east. East of the substation site is further farmland along the coast. Almost 1-km from the site is a narrow unpaved track that runs down to a small informal parking area at the coast – this track connects to a public highway running directly into Tarbert Village. Approximately 200 metres further along, there are a series of very large oil storage tanks along the coast – these are currently being renovated and expanded. They are linked via a private road that runs further east along the headland, linking to the N69 road to the ferry. Tarbert Power station (and the existing substation), lies 2 km along the coast, on a small island connected to land via a causeway and small bridge. The ferry quay lies on the eastern side of the island. 3. Proposal The proposed development is described on the site notice as: i. Construction of a Gas Insulated Switchgear (GIS) 220/110 kV substation complex, including: a 220 kV switchgear building of approximately 1,073 m² floor area, and up to approximately 14.5 metres height; a 110 kV switchgear building of approximately 617 m² floor area, and up to approximately 12.5 metres height; associated and ancillary outdoor electrical equipment; PL08.VA0007 An Bord Pleanála Page 3 of 24 associated internal access road, car parking areas, boundary treatment, and site development works; all within a compound site of approximately 14,154 m² in the townland of Kilpaddoge; ii. Construction of an associated access road approximately 875 metres in length and 6 metres in width from the L1010 road to the proposed substation, and including a new vehicular entrance onto the L1010 road; iii. Construction of 11 no. associated overhead 110 kV and 220kV electrical transmission towers in the general vicinity of the substation complex, varying in height between approximately 13.5 metres and approximately 45 metres; iv. Associated decommissioning and removal of 43 no. existing overhead electricity structures, in the general vicinity of the substation complex, v. Installation of associated underground cables facilitating connection between the new overhead electricity transmission structure sand the proposed substation; The proposed overhead electricity transmission structures will enable the undergrounding of sections of the existing overhead lines: Tarbert-Tralee 2 110kV, Tarbert-Clashavooon 220 kV, 220 kV Killonan-Tarbert, 110 kV Tralee-Trien, 110 kV Tarbert-Tralee and 110 kV Aughinish-Rathkeale electricity circuits, with the associated decommissioning and removal of existing overhead lines and structures along these circuits. Although not mentioned in the site notice, the proposed development also includes a proprietary wastewater treatment plant to serve the maintenance building. A number of items are indicated on the site plans, but are not part of the application. These include the Tarbert to Moneypoint underwater cable and the removal of existing substation and switchgear on Tarbert Island. 4. Summary of file correspondence Applicants submission The applicants submitted the application under Section 182A of the Strategic Infrastructure Act 2006. The application includes an Environmental Report which follows the format of an Environmental Impact Assessment. The Board did not request additional information following the original submission. Statutory Consultees National Roads Authority No objection in principle – mitigation measures in the documentation submitted are noted. Notes that KCC propose an inner relief road in Tarbert. Requests a condition at detailed design stage that the proposed traffic signal arrangements should be agreed with KCC and the NRA. PL08.VA0007 An Bord Pleanála Page 4 of 24 Department of Art, Heritage and the Gaeltacht Concurs with the mitigation recommendations set out in 14.7.1 of the Environmental REport on archaeology. Although it is considered unlikely that there would be an impact on architectural heritage, it is noted that under S.I.93 of 1999, an assessment should be an integral part of the EIA process – it is requested that this be taken account of in the final decision. It is noted that the route of the above ground section of the proposed powerline passes through a soon to be notified SPA (crossing the water between Tarbert Island and the mainland).