1GL benchmark & bolt on Bont Seiont, Caernarfon
Introduction
The photograph on this page of 1GL benchmark & bolt on Bont Seiont, Caernarfon by Meirion as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
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1GL benchmark & bolt on Bont Seiont, Caernarfon
Image: © Meirion Taken: 20 Jul 2011
This 1GL benchmark & bolt located on Bont Seiont (Seiont Bridge) in Caernarfon was used during the Ordnance Survey's First Primary Levelling on the line between Warrington and Pembroke Docks, between September 1851 and July 1852. This mark was mark No.315 along this levelling line. The Ordnance Survey database shows that this mark was last inspected in 1973 and is 12.7638m above the Newlyn datum. See also: Image
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
53.130181
Longitude
-4.268983