Welcome to the Snowdonia Pumped Hydro Website

Snowdonia Pumped Hydro (SPH) intends to build a 600 MWh pumped electricity storage facility at Glyn Rhonwy near Llanberis.

The scheme was granted planning permission by Gwynedd Council in February 2014. Now SPH is applying to increase the output of the facility from 49.9MW to 99.9MW. 

This would be achieved solely by increasing the capacity of the underground turbines and associated equipment. In every other respect the revised facility would remain identical to that originally approved by Gwynedd Council.

This Website provides regularly updated information on the proposed change in output and on the statutory process that SPH must go through in order to secure permission for the proposed change. 

 Click here to find out more.