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 11 January 2016
From Stephanie Duits


I’d like to register as an interested party in regard to the Glyn Rhonwy Development. I belong to a swimming club of around 60 members and I am expressing my concerns particularly to the impact of the development of the Lagoons area of Llyn Padarn and the potential harm to water quality following the planned discharge into Llyn Padarn.

During the months of April to October, many members of my swimming club use the Lagoons area and Llyn Padarn at least twice per week for open water swimming and social activities (BBQs etc).

We are concerned with the location of pumping station for water abstraction particularly:

1. disruption to access during construction

2. damage to trees along the shoreline

3. impact on the amenity (which is heavily used by many locals) in terms of noise and light pollution.

?We would also like to make representation about the permanent loss of the Llyn Padarn amenity due to water pollution following the planned discharge from the development.

Glyn Rhonwy quarries were used to store 14,000 tons of bombs filled with tabun (a toxic nerve gas). Surplus and faulty ordnance was also disposed of in the quarries.

The site survey document by Zetica (“SITESAFE UXO DESK STUDY” - extracts quoted below) highlights a number of extremely worrying points including (and not restricted to):

1. “Records indicate that this disposal was not always successful. Firstly ordnance would often get lodged on rock shelves, in slate piles or within crevices when tipped into the quarry, never making it into the burning pit”.

2. “Given the volume of ordnance that required clearance, and the working practices of the period, it is possible that some explosive items were inadvertently disposed of in Pit2B and residues may have remained within some of the casings”

In relation to encountering live ordnance during clearing processes…

3. ”This means that there are still live ordnance items within the remained of the [slate] pile, constituting a significant source of UXO hazard.”

In relation to the 1972 clearing process:

4. “During clearance of the slag heap it was discovered that the previous disposal process had been inefficient and was incomplete, with live and semi-destroyed material still in place. Unburnt magnesium powder was interspersed with live detonators and other explosives.”

5. “It should be noted that the RAF was unwilling to certify the quarries completely free of explosives, despite rendering safe each disposal area.”

6. “During recent Site walkovers [in 2015] , the Client has encountered potential items of UXO on the access path to Pit 2A…..These discoveries indicate that, despite the extensive EOD operation undertaken, not all items of ordnance within the quarry pits were accounted for.”

These points (and many others in the document) indicate, at the very least, a considerable risk of contamination of any water discharged from the development into Llyn Padarn.