1GL benchmark on railway station booking office, Bangor
Introduction
The photograph on this page of 1GL benchmark on railway station booking office, Bangor 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.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Image: © Meirion Taken: 25 Aug 2010
This 1GL benchmark located on the southeast face of the booking office at Bangor railway station 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.1 on a branch line between Bangor and Holyhead. The Ordnance Survey database shows that this mark was last inspected in 1974 and is 33.5449m above the Newlyn datum.