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Pumped Storage Hydro

Glyn Rhonwy (larger version)

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Llanberis, Caernarfon, Gwynedd, Gwynedd, LL55 4EL

Glyn Rhonwy (larger version) is a 99.9 MW pumped storage hydro project in Wales. The applicant or operator on record is Snowdonia Pumped Hydro (Quarry Battery Company). Planning permission has been granted as of March 2017 and it is awaiting construction. The determining authorit…

Consented / Approved
Official register: July 2026

Recorded status: Planning Permission Granted. Source record updated 2023-01-24.

Registered planning capacity; not measured generation.

DESNZ source publication Β· Search the full register Β· Definitions and coverage

99.900 MW
Registered Capacity

πŸ“‹ Project Overview

Glyn Rhonwy (larger version) is a 99.9 MW pumped storage hydro project in Wales. The applicant or operator on record is Snowdonia Pumped Hydro (Quarry Battery Company). Planning permission has been granted as of March 2017 and it is awaiting construction. The determining authority is The Planning Inspectorate - National Infrastructure, reference EN010072.

Site Schematic

UPPER RES. LOWER RES. PENSTOCK TAILRACE GEN. GRID ⇑ PUMP ⇓ GENERATE HEAD: ?m Β· POWER: 99.900 MW Β· ? turbines

Schematic diagram β€” not to scale. Illustrative layout based on project specifications.

πŸ”§ Technical Specifications

Capacity (MW)99.900 MW

πŸ”Œ Grid Connection & Infrastructure

🏒 Development & Ownership

DeveloperSnowdonia Pumped Hydro (Quarry Battery Company)
Owner / operatorSnowdonia Pumped Hydro (Quarry Battery Company)
Year consented2017
LocationLlanberis, Caernarfon, Gwynedd, Gwynedd, LL55 4EL
RegionWales
Coordinates53.1252705Β°N, 4.1349507Β°W

Additional published register fields

Registered technologyPumped Storage Hydroelectricity
Are they re-applying (Old REPD Ref) 6876

πŸ“… Project Timeline

2015-10-21
2017-03-08