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OSBM Bolt 
OSBM Bolt on concrete block in bank, 11' N of hedge angle, N side of road [3GL].
Location
Grid reference: SN 0307 3876.
Landranger 145: Cardigan & Mynydd Preseli.
Landranger 157: St David's & Haverfordwest.
Structure: Concrete block.
Waypoint: OS0600.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Cardigan,
19.24km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Haverfordwest to Cardigan levelling line. The surveyor's description was OSBM Bolt on concrete block in bank, 11' N of hedge angle, N side of road.
Location
Grid reference: SN 0307 3876.
Landranger 145: Cardigan & Mynydd Preseli.
Landranger 157: St David's & Haverfordwest.
Structure: Concrete block.
Waypoint: OS0600.
Neighbouring Flush Brackets
| S7811 | Holm House Uchaf 1.01km to the east. |
| S7812 | Dinas Cross, Cedeon Chapel 1.11km to the west. |
| S0566 | Rhos Dinas, School 2.02km to the west. |
| S7813 | Dinas Cross, Glan Hotel 2.70km to the west. |
| S0565 | Newport, St. Mary's Church 2.71km to the east. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Haverfordwest to Cardigan levelling line. The surveyor's description was OSBM Bolt on concrete block in bank, 11' N of hedge angle, N side of road.
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