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OSBM Bolt 
OSBM Bolt on culvert, N side of stream, E side of road [3GL].
Location
Grid reference: SU 6166 5727.
Landranger 175: Reading & Windsor, Henley-on-Thames & Bracknell.
Structure: Culvert.
Waypoint: OS0236.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Basingstoke,
6.11km 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 Basingstoke to Wallingford levelling line. The surveyor's description was OSBM Bolt on culvert, N side of stream, E side of road.
Location
Grid reference: SU 6166 5727.
Landranger 175: Reading & Windsor, Henley-on-Thames & Bracknell.
Structure: Culvert.
Waypoint: OS0236.
Neighbouring Flush Brackets
| G3404 | Pamber End, Queens College Arms 1.16km to the northwest. |
| G3403 | Sherborne St John 1.66km to the south. |
| G3405 | Pamber Green, Cottage Farm 2.70km to the north. |
| G3402 | The Spinneys 3.09km to the south. |
| G3406 | Tadley, School 3.86km 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 Basingstoke to Wallingford levelling line. The surveyor's description was OSBM Bolt on culvert, N side of stream, E side of road.
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