Dinorwig

Dinorwig pumped hydro overview.

Dinorwig is an underground pumped storage power station above Llanberis in North Wales, owned and operated by First Hydro Company. It provides rapid-response generation and grid-balancing services. A long-term replanting programme is renewing its generating equipment, with GE Vernova selected to replace the first two units.In OperationUnited Kingdom

At a Glance

Declared capacity

1,800 MW

Energy storage

Data coming soon

Operator

Data coming soon

Country

United Kingdom

Location

53.119°, -4.114°

Website

Official project page

Ownership

3 records

Share	Role	Details	Period
Unknown	Indirect Parent	La Caisse holds 25% of First Hydro Company, which owns and operates Dinorwig. The percentage refers to the company shareholding.	Current / not dated
Unknown	Indirect Parent	ENGIE holds 75% of First Hydro Company, which owns and operates Dinorwig. The percentage refers to the company shareholding.	Current / not dated
Unknown	Owner Operator	First Hydro Company owns and operates Dinorwig pumped storage power station.	Current / not dated

Organisations

3 records

Organisations recorded as working on this asset or its project, and their role.

Organisation	Role	Details
First Hydro Company	Operator Or Applicant	Not set
	Pump-turbine unit replacementEquipment Supply	GE Vernova was selected to replace two 315 MW pumped storage units as part of Dinorwig’s replanting programme.
	Replanting design technical assistanceTechnical Advisory	Tractebel provides design-stage technical assistance for Dinorwig’s replanting programme, including mechanical, electrical and control-system reviews.

Capacity history

Recorded project capacity figures. Future-dated changes are shown but are not used as current capacity.

Effective	Capacity type	Capacity	Source
Current	Declared capacity	1,800 MW	GE Vernova — stated maximum generating output

Wind [m/s]

Wave [m]