Snowdonia Chloe Graham. Where is it?. Features and landscapes. Traditional industry and uses/ History.
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With glaciated valleys, steep sides and hanging valleys above them, a lot of energy from water is produced. A very environmentally friendly way of producing energy. Rain water is piped and runs a turbine, then allowed to continue down the stream. This is what happens at Cwm Dvli at the foot of Snowdon. The power stations can produce enough energy for the whole of the United Kingdom in 16 seconds. Two lakes are used: Marchllyn Mawr is the upper lake at a height of 630m and Llyn Peris is the lowest at a height of 500m. Water flows through the middle of the mountain – Moel Eilio turning the turbines on its way. When electricity is cheap at night, the water is then pumped back into the upper lake.