1GL benchmark & bolt at St. Madryn's Church, Trawsfynydd
Introduction
The photograph on this page of 1GL benchmark & bolt at St. Madryn's Church, Trawsfynydd 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 at St. Madryn's Church, Trawsfynydd
Image: © Meirion Taken: 21 Mar 2012
This 1GL benchmark & bolt is located on the SE angle of St. Madryn's Church in Trawsfynydd and 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 was mark No. 439 along this levelling line and was 771.7940ft above the Liverpool datum. The Ordnance Survey database shows that this mark was last verified in 1942.
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
52.902589
Longitude
-3.924286