OSBM Flush Bracket S0557 - Cardigan, St. Mary's School

Introduction

The photograph on this page of OSBM Flush Bracket S0557 - Cardigan, St. Mary's School by N Scott as part of the Geograph project.

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OSBM Flush Bracket S0557 - Cardigan, St. Mary's School

Image: © N Scott Taken: 3 May 2016

Ordnance Survey Benchmark (OSBM) used for levelling height above Ordnance Datum (OD). Height (1954): 7.3333m OD (Newlyn). Mark verified by the Ordnance Survey in 1973. Description: FL BR S0557 S FACE 4.3M SW ANG SCH N SIDE RD. 1st Order BM. The bracket was used on the Haverford West to Cardigan line (G077) of the Third Geodetic Levelling of England & Wales in 1954. Abstract G 65: http://discovery.nationalarchives.gov.uk/SearchUI/details?Uri=C11264473 [OS 54/754] The bracket was previously used on the Aberayron to Carmarthen secondary line of the Second Geodetic Levelling of England & Wales in 1953-1954. It was levelled with a height of 24.117' above OD (Newlyn). Abstract S 7: http://discovery.nationalarchives.gov.uk/details/r/C11225155 [OS 54/639]. It was originally levelled at 24.282' above OD (Newlyn) on the Aberaeron to Carmarthen secondary line in 1927-1928. Description: S face, 10' from SW angle of school, N side of Pont-y-Cleifion, Cardigan. Abstract A 471: http://discovery.nationalarchives.gov.uk/details/r/C11178815 [OS 54/136]. Close-up: Image

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