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OSBM Bolt 
OSBM Bolt on NW end of bridge parapet, SW side of road [destroyed 30/04/84].
Location
Grid reference: SZ 4717 7837.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Bridge.
Waypoint: OS0086.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Calbourne,
9.41km to the northwest.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Gurnard (IOW) to Freshwater (IOW) levelling line. The surveyor's description was OSBM Bolt on NW end of bridge parapet, SW side of road.
Location
Grid reference: SZ 4717 7837.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Bridge.
Waypoint: OS0086.
Neighbouring Flush Brackets
| G4472 | Pyle 821.34m to the northeast. |
| G4471 | Chale Green 2.02km to the northeast. |
| G4473 | Atherfield Point 2.11km to the northwest. |
| G4460 | Great Appleford Bridge 3.71km to the northeast. |
| S2447 | Niton, Village Hall 3.92km to the southeast. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Gurnard (IOW) to Freshwater (IOW) levelling line. The surveyor's description was OSBM Bolt on NW end of bridge parapet, SW side of road.
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