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OSBM Bolt 
OSBM Bolt on concrete surround of water valve, on verge, SE side of road junction [3GL]; OS BM BOLT CONCRETE SURROUND SE SIDE RD JUNC.
Location
Grid reference: SN 0188 0010.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0920.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1969),
16.47km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt on concrete surround of water valve, on verge, SE side of road junction.
Location
Grid reference: SN 0188 0010.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0920.
Neighbouring Flush Brackets
| S0603 | Lamphey, Church 502.49m to the northwest. |
| G5111 | Little Portclew Farm 1.33km to the south. |
| G5112 | Hodgeston 1.33km to the southeast. |
| G5110 | East Trewent 2.89km to the south. |
| S7943 | Pembroke, Eastgate School 3.10km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt on concrete surround of water valve, on verge, SE side of road junction.
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