File:Garreg Ddu - geograph.org.uk - 902829.jpg
Garreg_Ddu_-_geograph.org.uk_-_902829.jpg (640 × 480 pixels, file size: 91 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionGarreg Ddu - geograph.org.uk - 902829.jpg |
English: Garreg Ddu The hidden depths of Garreg-ddu dam
In the Elan Valley the second dam 'up-river' after Caban-coch doesn't really look like a dam at all. This is Garreg-ddu, which is sometimes called the 'submerged dam'. Garreg-ddu plays a more important part in providing a constant supply of water to Birmingham than you would guess. The part you can see above the normal water level, as in the photograph shown here, just looks like a narrow road bridge made of stone, with many arches. The water supply from the Elan Valley goes over 70 miles to Birmingham by a special pipeline called an 'aqueduct'. It travels all that way 'downhill' by gravity without being pumped, but to do that it has to start from a higher level than the reservoir at the far end. The water enters the aqueduct through a special valve tower just above this submerged dam. The underwater dam does the job of keeping the Garreg-ddu Reservoir water level high enough to keep the flow going at all times. |
Date | |
Source | From geograph.org.uk |
Author | Anthony Gostling |
Attribution (required by the license) InfoField | Anthony Gostling / Garreg Ddu / |
InfoField | Anthony Gostling / Garreg Ddu |
Camera location | 52° 15′ 47″ N, 3° 35′ 47″ W | View this and other nearby images on: OpenStreetMap | 52.262950; -3.596300 |
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Object location | 52° 15′ 47″ N, 3° 35′ 51″ W | View this and other nearby images on: OpenStreetMap | 52.263030; -3.597500 |
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Licensing
[edit]This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Anthony Gostling and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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current | 19:37, 21 February 2011 | 640 × 480 (91 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Garreg Ddu The hidden depths of Garreg-ddu dam In the Elan Valley the second dam 'up-river' after Caban-coch doesn't really look like a dam at all. This is Garreg-ddu, which is sometimes called the |
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