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PLAN of Dinorwig pumped storage scheme, Marchlyn Dam road layout (sheet 3)
This material is held atGwynedd Archives Service - Caernarfon Record Office / Gwasanaeth Archifau Gwynedd, Archifdy Caernarfon
- Reference
- GB 219 XMMAPS13534/10
- Dates of Creation
- 1974 Apr