OSBM Bolt: Waterston, Oil Refinery   

NBM BOLT TOP WKS TP S SIDE AVENUE R JUNC 11TH ST (52.5177m ODN, 0.8m AGL, 3rd order, verified 1971).

Location
Grid reference: SM 9382 0457.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Unknown.
Waypoint: OS2867.

Neighbouring Flush Brackets

S7941	Pembroke Dock, Barracks 3.32km to the east.
G5100	Milford Haven, Pill Road 3.32km to the northwest.
G4919	West Popton Farm 3.51km to the west.
S7942	Pembroke Dock, Council Offices 3.72km to the east.
G5099	Steynton, Hayguardhay Farm 3.85km to the northwest.

The nearest fundamental bench mark is Haverfordwest (1969), 11.54km to the north.