Power plant · Gwynedd, Wales, United Kingdom
Glyn Rhonwy Pumped Storage
Glyn Rhonwy Pumped Storage is a power plant in Gwynedd, Wales, United Kingdom, with 99.9 MW of capacity, operated by Snowdonia Pumped Hydro.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Gwynedd (coordinates), Wales (Wales) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Location | Gwynedd (coordinates), Wales | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Cefn-Du Mountain, Gwynedd | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Llanberis, Caernarfon, Gwynedd, LL55 4EL | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Permitted (post-decision, granted) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Permitted (planning permission granted) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 8 Mar 2017 (permit EN010072, Planning Act 2008 development consent, issued by Secretary of State) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 8 Mar 2017 (permit EN010072, Planning Act 2008 development consent, issued by The Planning Inspectorate - National Infrastructure) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 21 Oct 2015 (reference EN010072, planning authority The Planning Inspectorate) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 21 Oct 2015 (reference EN010072, planning authority The Planning Inspectorate - National Infrastructure) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 8 Mar 2017 (granted, reference EN010072, planning authority The Planning Inspectorate) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 8 Mar 2017 (granted, reference EN010072, planning authority The Planning Inspectorate - National Infrastructure) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Snowdonia Pumped Hydro (applicant) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Snowdonia Pumped Hydro (Snowdonia Pumped Hydro (Quarry Battery Company)) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 99.9 MW (description) | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 99.9 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Battery | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Pumped Storage Hydroelectricity | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Pumped Storage Hydroelectricity (stand-alone storage) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Area | 91.4 ha (application boundary) | planning.data.gov.uk · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 53.1237, -4.1494 | Planning Inspectorate: National Infrastructure Projects · record · Open Government Licence v3.0 · checked 24 Oct 2026 |
Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.
Request researchAlso recorded as
2 sources record Glyn Rhonwy Pumped Storage; this page joins their facts, each with its own source. Links to any of the records lead here. How records are matched.
| Name in the source | Identifier | Source | Matched on |
|---|---|---|---|
| Glyn Rhonwy Pumped Storage | asset:pins-nsip:en010072 | Planning Inspectorate: National Infrastructure Projects | — |
| Glyn Rhonwy (larger version) | asset:repd:6868 | DESNZ Renewable Energy Planning Database (REPD) | Same planning reference |
How it compares
Glyn Rhonwy Pumped Storage is the 38th-largest of 177 power plants planned, permitted or under construction in Wales and the 501st-largest of 3,222 in the United Kingdom by capacity; its 99.9 MW is <0.1% of the 300,661 MW of power plants planned, permitted or under construction we hold for the United Kingdom. It is not built yet, so it is ranked among the power plants planned, permitted or under construction in our data, apart from the ones running today. Ranks and totals cover the ones that report their capacity.
| Within | Rank | Total | Share |
|---|---|---|---|
| Wales | 38th of 177 | 16,801 MW | 0.59% |
| United Kingdom | 501st of 3,222 | 300,661 MW | <0.1% |
| All power plants planned, permitted or under construction in our data | 1,415th of 6,455 | 664,240 MW | <0.1% |
Nearby
Within 50 km of this power plant: 1 transmission line, measured from the coordinates in the facts above.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| North Wales Wind Farms Connection | Transmission line | — | Permitted | 46 km |
Operator and place
Other power plants in Wales
- Dinorwig1,728 MW
- Gwynt y Mor576 MW
- Ffestiniog360 MW
- Port Talbot Renewable Energy Plant350 MW
- Anglesey Biomass Power Station299 MW
- Tidal Lagoon Swansea Bay240 MW
- Pen Y Cymoedd228 MW
- Carnedd Wen Wind Farm150 MW
Data on this page
- DESNZ Renewable Energy Planning Database (REPD). DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- Planning Inspectorate: National Infrastructure Projects. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- planning.data.gov.uk. planning.data.gov.uk, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.