OS benchmark - Oakengates, Canongate railway bridge
Introduction
The photograph on this page of OS benchmark - Oakengates, Canongate railway bridge by Richard Law 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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Image: © Richard Law Taken: 10 Aug 2014
This appears to be the datum line of an OS cutmark on the parapet of the Image over the former Coalport to Hadley coal mine line; originally levelled at 133.158m above Ordnance Datum Newlyn.