Glyn Rhonwy Pumped Storage

The views expressed in this page do not represent those of the Planning Inspectorate. This page consists of content submitted to the Planning Inspectorate by the public and other interested parties, giving their views of this proposal.

Glyn Rhonwy Pumped Storage

Received 13 January 2016
From Tony Grant


Health & Safety
1/ The Zetica report on munitions storage at Glyn Rhonwy in and of itself should prohibit any development involving underground working at the site.
2/ The proposed construction route via a single track lane through Waunfawr constitutes a serious risk to centuries’ old buildings without foundations, resultant damage/collapse from vibration due to excessive loads poses a serious threat to safety of inhabitants.

3/ The area adjacent to Glyn Rhonwy and the Snowdonia National Park has just been awarded ‘Dark Sky’ status. The ‘security lighting’ proposed would see this status revoked.
4/ The footprint of the site is far bigger than neighbouring Dinorwic, but would provide less than 5% of its output. The site would be an eyesore, viewable from the summit of Snowdon, and detrimental to the National Park/tourism as a whole. Dinorwic currently runs at less than 25% of its capacity.
5/ There is a significant flood risk to both Llanberis and Waunfawr/Betws Garmon, should accidental spillage occur. Water pollutants could also damage the ecosystem in Llyn Padarn, and pollute private water supplies serving up to 50 households. Moreover, excessive rainfall, which at present drains from Cefn Du into the whole of the surrounding area of Llanberis, Cwm y Glo, Waunfawr, & Betws Garmon, could only drain into Llyn Padarn once SPH is operational, increasing the flood/pollution risk significantly.
6/ No in-depth environmental study of flora and fauna was conducted, the report submitted to Gwynedd Council was incomplete, inaccurate, and missed protected species.

Energy Generation
7/ Pumped storage does NOT produce electricity, only partially recycles. With it’s own maintenance and security/lighting proposals, the scheme would at best be 75% efficient, and is not ‘green’ as suggested.
8/ Vanadium batteries are viable large, industrial scale, long lifetime, with multiple charge/discharge cycles in excess of previous battery technology, and which actually store electricity, not water. REDT is a leading British company developing and installing this technology at present (not years in the future). Thus pumped storage is already obsolete.

Long Term
9/ Detrimental health aspects are difficult to determine in advance, noxious pollutants from the construction could take several years before becoming apparent. Similarly, once operational, noise/vibration from the overnight pumping could disrupt sleep for many local residents, as sound travels more ‘efficiently’ through solids (such as the geological substrate of this area) and be more obtrusive in an area which is normally so still and quiet.
10/ From point 5 above, the power generation would need to be suspended during heavy rainfall to avoid the scenario stated.