OSBM Bolt   

OSBM Bolt on concrete block at junction of hedges, W side of road [3GL].

Location
Grid reference: SM 9605 2379.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0592.

Neighbouring Flush Brackets

S7824	Treffgarne Lodge 725.67m to the south.
S7823	Weir Castle 898.89m to the north.
S0577	Corner Piece PH 1.98km to the south.
S7822	Wolf's Castle, Railway Bridge 2.50km to the north.
S0576	Wolf's Castle, School 2.86km to the north.

The nearest fundamental bench mark is Haverfordwest (1953), 7.93km 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 at junction of hedges, W side of road.