Marchlyn Mawr
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| Basin countries | United Kingdom |
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| Date of Reg. | |
| Date of Upd. | |
| ID | 2224939 |
About Marchlyn Mawr
Marchlyn Mawr reservoir is a high level lake in Snowdonia behind Elidir Fawr mountain. It is used as the high level water source for Dinorwig power station, a closed-loop pumped storage hydroelectric generating facility.