Dinorwig

Dinorwig is an operational 1.73 GW pumped storage scheme in Gwynedd, generating since 1 January 1983. REPD does not record the planning grant date. Operator of record: First Hydro Company.

1.73 GW

Capacity

as recorded in REPD

Operational

Status

since 1 January 1983

Pumped Storage Hydroelectricity

Technology

First Hydro Company

Gwynedd

Authority

Wales

Planning and build timeline

Application submitted	not recorded
Permission granted	not recorded
Operational	1 January 1983

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Other built sites within 15 km

Site	MW	Distance
Parciau Farm Solar Park Solar Photovoltaics · Operational	13.9	10 km
Cwm Dyli Large Hydro · Operational	9.9	10 km

How big is Dinorwig?

Dinorwig has a recorded installed capacity of 1.73 GW. That figure is the capacity registered in REPD, which is the scheme as consented — the metered output of a site can differ.

Who operates Dinorwig?

REPD records the operator as First Hydro Company. Ownership of built renewable assets changes hands regularly and REPD is published quarterly, so treat this as the operator of record rather than confirmation of who owns it today.

When was Dinorwig approved and built?

REPD does not record a submission date. REPD does not record a grant date. The site became operational on 1 January 1983.

Source: Renewable Energy Planning Database (REPD), Department for Energy Security and Net Zero, Open Government Licence v3.0, plus planning designation boundaries from planning.data.gov.uk (England only). REPD is published quarterly and covers schemes of roughly 150 kW and above. Capacity is the installed capacity on record, not metered generation. Operator is the operator of record at the last extract, not confirmation of present ownership. Reference 6839.

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