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OSBM Bolt 
OSBM Bolt on concrete block, SW side of road, 7' NW from hedge junction opposite side of road [3GL].
Location
Grid reference: SM 9402 3036.
Landranger 157: St David's & Haverfordwest.
Structure: Concrete block.
Waypoint: OS0596.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1953),
14.71km to the south.
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, SW side of road, 7' NW from hedge junction opposite side of road.
Location
Grid reference: SM 9402 3036.
Landranger 157: St David's & Haverfordwest.
Structure: Concrete block.
Waypoint: OS0596.
Neighbouring Flush Brackets
| S7820 | Ty Goch 355.11m to the southeast. |
| S7819 | Newbridge 1.26km to the north. |
| S7821 | Letterston, Harp Inn 1.31km to the southeast. |
| S7818 | Forge Farm 2.61km to the north. |
| S7817 | Scleddau, Cwmdwr 4.06km to the north. |
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, SW side of road, 7' NW from hedge junction opposite side of road.
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