File:The upper pit of the Lower Glynrhonwy Quarry - geograph.org.uk - 315624.jpg

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English: The upper pit of the Lower Glynrhonwy Quarry This is the highest, deepest and largest of the three Lower Glynrhonwy pits. When both the Upper and Lower Glynrhonwy quarries were working (up to 1930) their contiguous linear nature along a rising slope meant that they were self draining, the whole system being linked by tramway and drainage tunnels. The collapse of the tunnels led to the formation of a deep lake at the bottom of this pit. A major operation to render safe thousands of tons of unexploded bombs dumped into the lake necessitated its drainage during the 1970s. http://www.rafbdhistory.co.uk/new_page_7.htm
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Source From geograph.org.uk
Author Eric Jones
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Eric Jones / The upper pit of the Lower Glynrhonwy Quarry / 
Eric Jones / The upper pit of the Lower Glynrhonwy Quarry
Camera location53° 07′ 31″ N, 4° 08′ 43″ W  Heading=67° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
Object location53° 07′ 31″ N, 4° 08′ 41″ W  Heading=67° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Eric Jones
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current16:02, 30 December 2010Thumbnail for version as of 16:02, 30 December 2010640 × 480 (144 KB)GeographBot (talk | contribs)== {{int:filedesc}} == {{Information |description={{en|1=The upper pit of the Lower Glynrhonwy Quarry This is the highest, deepest and largest of the three Lower Glynrhonwy pits. When both the Upper and Lower Glynrhonwy quarries were working (up to 1930)

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