Power plant · Carmarthenshire, Wales, United Kingdom
Ystradffin Hydropower Project
Ystradffin Hydropower Project is a power plant under construction in Carmarthenshire, Wales, United Kingdom, with 1.8 MW of capacity, operated by Hydro Electric Development.
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 | Carmarthenshire (coordinates), Wales | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Address | Ystradffin Hydropower Project, Rhandirmwyn, Llandovery, Dyfed, SA20 | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Status | Under construction | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Permit date | 29 Nov 2022 (permit E/34887, Town and Country Planning Act, issued by Carmarthenshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Application date | 21 Dec 2016 (reference E/34887, planning authority Carmarthenshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Decision date | 29 Nov 2022 (granted, reference E/34887, planning authority Carmarthenshire) | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Operator | Hydro Electric Development | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Capacity | 1.8 MW | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Technology | Small Hydro | DESNZ Renewable Energy Planning Database (REPD) · Open Government Licence v3.0 · checked 24 Oct 2026 |
| Coordinates | 52.0984, -3.7859 | DESNZ Renewable Energy Planning Database (REPD) · 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 researchHow it compares
Ystradffin Hydropower Project is the 153rd-largest of 177 power plants planned, permitted or under construction in Wales and the 2,871st-largest of 3,222 in the United Kingdom by capacity; its 1.8 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 | 153rd of 177 | 16,801 MW | <0.1% |
| United Kingdom | 2,871st of 3,222 | 300,661 MW | <0.1% |
| All power plants planned, permitted or under construction in our data | 6,078th of 6,455 | 664,240 MW | <0.1% |
Nearby
Within 50 km of this power plant: 72 grid connections and 1 transmission line, measured from the coordinates in the facts above. The table shows the nearest 4, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Ystradffin Hydro Generation LLANDOVERY grid connection | Grid connection | — | — | 0.2 km |
| LLYN Brianne Reservoir, Dyfed grid connection | Grid connection | — | — | 1.2 km |
| LLANDDEWI Brefi grid connection | Grid connection | — | — | 9.0 km |
| Brechfa Forest Connection | Transmission line | — | Permitted | 32 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.
- NGED Connected Data portal. NGED Connected Data portal, Terms not verified.
- Planning Inspectorate: National Infrastructure Projects. Planning Inspectorate: National Infrastructure Projects, 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.