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OSBM Bolt 
OSBM Bolt on milestone, 22' E from hedge junction, S side of road [3GL].
Location
Grid reference: SM 9774 3738.
Landranger 157: St David's & Haverfordwest.
Structure: Milestone.
Waypoint: OS0598.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1953),
21.52km 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 milestone, 22' E from hedge junction, S side of road.
Location
Grid reference: SM 9774 3738.
Landranger 157: St David's & Haverfordwest.
Structure: Milestone.
Waypoint: OS0598.
Neighbouring Flush Brackets
| S7815 | Pont Tre Cynny 280.00m to the west. |
| S7814 | Garn 1.34km to the east. |
| S0575 | Fishguard, St. Mary's Church 1.98km to the west. |
| S7813 | Dinas Cross, Glan Hotel 2.82km to the east. |
| 11518 | Fishguard Harbour, Tide Gauge Aux 3 3.29km to the west. |
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 milestone, 22' E from hedge junction, S side of road.
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