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OSBM Bolt 
OSBM Bolt on concrete block, SE side of road at hedge junction [3GL]; OSBM BOLT SE SIDE RD JUNC HEDGES.
Location
Grid reference: SN 3362 5188.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0666.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Cardigan,
14.01km to the southwest.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Cardigan to Aberystwyth levelling line. The surveyor's description was OSBM Bolt on concrete block, SE side of road at hedge junction.
Location
Grid reference: SN 3362 5188.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0666.
Neighbouring Flush Brackets
| S7790 | New Inn 269.07m to the northeast. |
| S7791 | Brynhoffnant, Capel Moriah 820.24m to the southwest. |
| S7789 | Pentregat 1.78km to the east. |
| S0553 | Sarnau, St John's Church 2.23km to the west. |
| S7788 | Plwmp, Capel Crugiau 3.00km 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 Cardigan to Aberystwyth levelling line. The surveyor's description was OSBM Bolt on concrete block, SE side of road at hedge junction.
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