Development consisting of (a) A High Inertia Synchronous Compensator (HISC) compound containing 1 No. HISC unit enclosed…

Application details

Planning reference

22352

Council

Sligo County Council

Proposal description

Development consisting of (a) A High Inertia Synchronous Compensator (HISC) compound containing 1 No. HISC unit enclosed within a steel clad framed style structure (12.1m max height) and supported by 7 No. electrical equipment containers (containing ancillary power supply products including static frequency converters, MV switchgear, exciters, LV distribution, control room); 4 No. external cooler units; main, auxiliary & start-up electrical transformers, generator circuit breakers, switchgear equipment, and 1 No. back up diesel generator and associated diesel storage tank; (b) A 220kV High Voltage Gas Insulated Switchgear (GIS) compound containing a GIS building with all control & HV equipment within a single storey building (13.2m max height). The building will be surrounded by a compound road and contained within a 2.6 high galvanised steel palisade fence; (c) A 220kV underground cable to the existing adjoining Eirgrid substation boundary; (d) New access road and entrance from the L5204; (e) All associated and ancillary site works necessary to facilitate the development including: all necessary drainage systems, foundations works for the above compounds, various underground cables and ducts, equipment plinths, internal services roads, rainwater harvesting systems, welfare and office units, 2 No. material storage containers, compound lighting and palisade gates and fencing, security lighting, CCTV, hardstanding areas and boundary security fence. Planning permission to construct the development is sought for a period for 10 years. A Natura Impact Statement (NIS) has been prepared in respect of the proposed development and accompanies the application.

Location / address

Ballysumaghan , Sooey , County Sligo

Application type

PERMISSION

Received / registered

27 Oct 2022

Council decision

CONDITIONAL

Council decision date

21 Dec 2022

Final grant date

3 Feb 2023

Planning and construction timeline

Key dated milestones from planning, appeal and official building-control records.

1. Application received

   27 Oct 2022

2. Decision: CONDITIONAL

   21 Dec 2022

3. Final grant

   3 Feb 2023

4. Works commenced

   11 May 2026Official NBCO/BCMS data