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OSBM Bolt 
OSBM Bolt in top of retaining masonry of milestone 'Haverfordwest 4M Milford Haven 1M', SE side of road.
Location
Grid reference: SM 9199 0886.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Unknown.
Waypoint: OS0911.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1969),
8.35km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt in top of retaining masonry of milestone 'Haverfordwest 4M Milford Haven 1M', SE side of road.
Location
Grid reference: SM 9199 0886.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Unknown.
Waypoint: OS0911.
Neighbouring Flush Brackets
| G5099 | Steynton 1.08km to the south. |
| G5098 | Upper Harmeston Cottage 1.40km to the northeast. |
| G5100 | Milford Haven, Pill Road 2.77km to the south. |
| G5097 | Johnston 2.82km to the northeast. |
| G5096 | Pope Hill 3.88km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt in top of retaining masonry of milestone 'Haverfordwest 4M Milford Haven 1M', SE side of road.
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