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OSBM Bolt 
OSBM Bolt on culvert at junction of stream, NE side of road [3GL].
Location
Grid reference: SP 8586 4125.
Landranger 152: Northampton & Milton Keynes, Buckingham & Daventry.
Structure: Culvert.
Waypoint: OS0227.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Great Linford,
1.38km 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 Great Linford to Hemel Hempstead levelling line. The surveyor's description was OSBM Bolt on culvert at junction of stream, NE side of road.
Location
Grid reference: SP 8586 4125.
Landranger 152: Northampton & Milton Keynes, Buckingham & Daventry.
Structure: Culvert.
Waypoint: OS0227.
Neighbouring Flush Brackets
| G3260 | Milton Keynes, Lodge Farm 616.46m to the southeast. |
| 805 | Milton Keynes, Gifford Park 1.11km to the north. |
| 804 | Linford Wharf 1.32km to the north. |
| 1784 | Blackhorse Farm 1.55km to the north. |
| 662 | Stantonbury Wharf 1.69km 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 Great Linford to Hemel Hempstead levelling line. The surveyor's description was OSBM Bolt on culvert at junction of stream, NE side of road.
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