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FFESTINIOG PUMPED STORAGE SCHEME: LLYN STWLAN RESERVOIR

Site Details

© Copyright and database right 2020. All rights reserved. Ordnance Survey licence number 0100022206

NPRN 306315

Map Reference SH64SE

Grid Reference SH66424447

Unitary (Local) Authority Gwynedd

Old County Merioneth

Community Ffestiniog

Type of Site RESERVOIR

Broad Class INDUSTRIAL

Period 20th Century, Modern

Site Description Ffestiniog Pumped Storage Scheme was opened in 1963. The reservoir, Llyn Stwlan, has a capacity of 2,000,000 cubic metres of water, retained by a dam 244m long and 37m high. The water is used to drive four turbines in Ffestiniog Power Station (nprn 401209) to generate electricity; in off-peak periods, the turbines act as pumps to force water back to Llyn Stwlan.
Source: Ffestiniog Power Station.
RCAHMW, 12 December 2011.

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