PlanningRegister.ie
Back
Mayo County Council · 2560928

Existing Castlebar - Dalton 110kV overhead power line, See Particulars for multiple townlands, Co Mayo

Approved in 2026. No sign of building yet.

  1. 15 Dec 2025Received
  2. 12 Feb 2026Conditional
  3. 16 Mar 2026Final approval
  4. 15 Mar 2031Approval runs out
Applications, appeals and commencement notices for this county. Consultations, zoning and RZLT maps: Dublin, Kildare, Meath and Wicklow only for now.
Status
Approved
Decision
Conditional · 12 Feb 2026
Council
Mayo County Council
Type
PERMISSION
Site
141.19 ha

Live near Existing Castlebar - Dalton 110kV…?

Everything else planned on your street, in one report.

Check my street
Council register ↗

What’s proposed

EirGrid PLC, with the consent and approval of the Electricity Supply Board (ESB), intends to apply for permission for works to uprate the existing Castlebar - Dalton 110 kV overhead line (OHL). The proposed development will take place within the following townlands: Liscromwell Carrowkeel Brees Breandrum or Windsor Prison South Facefield Aghalusky Drumnaslooeen Mossbrook Cloontybaunan Ballinagran Ballynastangford Lower Derrynamraher Rathredmond Birchfield Cappavicar South Dooros Garrywadreen Keelkill Drumadoon Drumneen Ballinvoash Legaun Ballynastangford Upper Gneeve Ballymacloughlin Drumneen (Prendergast) Lisnaran Ballyrourke Ballynew Drumcorrabaun Pollavaddy Eskerlevally Kilmacrade Moat Drumneen South Burris Garhawnagh Castlegar Barrackland Carrowgarve Crantahar Rinnahulty Knocknamoghalaun Drumkeen Carrowmore Rathduff Clare Derreen Heathlawn Kilbeg-Malone Prison North Coolaghbaun The Castlebar - Dalton 110 kV circuit is 27.8 km in length and runs between the existing Castlebar 110 kV substation in the townland of Aghalusky in central County Mayo, to Dalton 110 kV substation located in the townland of Clare, eastern County Mayo. The OHL has a total of 144no. supporting structures. The proposed development will comprise: ? the replacement (“restringing”) of the existing OHL circuit conductor wires with a new higher capacity conductor between Castlebar 110 kV and the Dalton 110 kV substations; ? the replacement of end mast in-situ at 1no. location, with a similar structure; ? the replacement of angle masts in-situ at 6no. locations, with similar structures; ? the strengthening of tower foundations at 4no. locations; ? the strengthening of towers (i.e., member replacement) at 10no. locations; ? the painting of towers at 10no. locations; ? the replacement of tower bolts at 3no. locations; ? the replacement of polesets at 48no. locations, with similar structures. The change in structures will result in standardised heights from 16 m to 24 m along the circuit. The majority of the height increases will be between 0.1 m and 2.0 m; ? the replacement of insulating and ancillary hardware at all structure locations; ? the replacement of earthwire between structure number 132 and structure number 144; ? the replacement of stay wire / anchors and associated fittings at 16no. locations; ? the replacement of crossarms at 58no. locations; ? all associated temporary site development works to gain access to the existing structures inclu

Planning details

Reference
2560928
Local authority
Mayo County Council
Status
Granted with conditions · register status “APPLICATION FINALISED”
Received
15 Dec 2025
Observations close
28 Jan 2026 (closed 252 days ago)
Decision due
17 Feb 2026 · decided 12 Feb 2026
Decision
Conditional on 12 Feb 2026
Proposed development
EirGrid PLC, with the consent and approval of the Electricity Supply Board (ESB), intends to apply for permission for works to uprate the existing Castlebar - Dalton 110 kV overhead line (OHL). The proposed development will take place within the following townlands: Liscromwell Carrowkeel Brees Breandrum or Windsor Prison South Facefield Aghalusky Drumnaslooeen Mossbrook Cloontybaunan Ballinagran Ballynastangford Lower Derrynamraher Rathredmond Birchfield Cappavicar South Dooros Garrywadreen Keelkill Drumadoon Drumneen Ballinvoash Legaun Ballynastangford Upper Gneeve Ballymacloughlin Drumneen (Prendergast) Lisnaran Ballyrourke Ballynew Drumcorrabaun Pollavaddy Eskerlevally Kilmacrade Moat Drumneen South Burris Garhawnagh Castlegar Barrackland Carrowgarve Crantahar Rinnahulty Knocknamoghalaun Drumkeen Carrowmore Rathduff Clare Derreen Heathlawn Kilbeg-Malone Prison North Coolaghbaun The Castlebar - Dalton 110 kV circuit is 27.8 km in length and runs between the existing Castlebar 110 kV substation in the townland of Aghalusky in central County Mayo, to Dalton 110 kV substation located in the townland of Clare, eastern County Mayo. The OHL has a total of 144no. supporting structures. The proposed development will comprise: ? the replacement (“restringing”) of the existing OHL circuit conductor wires with a new higher capacity conductor between Castlebar 110 kV and the Dalton 110 kV substations; ? the replacement of end mast in-situ at 1no. location, with a similar structure; ? the replacement of angle masts in-situ at 6no. locations, with similar structures; ? the strengthening of tower foundations at 4no. locations; ? the strengthening of towers (i.e., member replacement) at 10no. locations; ? the painting of towers at 10no. locations; ? the replacement of tower bolts at 3no. locations; ? the replacement of polesets at 48no. locations, with similar structures. The change in structures will result in standardised heights from 16 m to 24 m along the circuit. The majority of the height increases will be between 0.1 m and 2.0 m; ? the replacement of insulating and ancillary hardware at all structure locations; ? the replacement of earthwire between structure number 132 and structure number 144; ? the replacement of stay wire / anchors and associated fittings at 16no. locations; ? the replacement of crossarms at 58no. locations; ? all associated temporary site development works to gain access to the existing structures inclu
As published by the register.
Site area
141.19 ha from the mapped boundary, not the council's figure
Applicant
Not published — the national feed carries no applicant name council register

Nearby 2 · 500 m · 5 years

Explore this area on the map →

Homes nearby

Zoning

C2.1 — Economic development and employment

Zoned for employment uses. Housing is not the intended use here.

P1 — Rural

Zoned to protect agriculture, rural enterprise and biodiversity. New houses are restricted to demonstrated local need.

Protections nearby 250 m

No mapped flood area nearby.

  • NIAH-recorded building · 1
    house
  • Recorded monument · 56
    Enclosure; Mound

Where this comes from

National planning feed (NPAD), fetched 18 Sept 2026, 15:44.

Source: npad · fetched 18 Sept 2026, 15:44
SourceLicenceFetchedLink
npadCC-BY-4.018 Sept 2026, 15:44open
Summary

2560928 is a planning application to Mayo County Council for eirGrid PLC, with the consent and approval of the Electricity Supply Board (ESB), received on 15 Dec 2025; permission was granted with conditions on 12 Feb 2026.