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OSBM Bolt 
OSBM Bolt on parapet of bridge over stream, SW side of road at junction of NW end of parapet & hedge [3GL]; OSBM BOLT PARA BR SW SIDE RD.
Location
Grid reference: SP 9230 1997.
Landranger 165: Aylesbury & Leighton Buzzard, Thame & Berkhamstead.
Structure: Bridge.
Waypoint: OS0229.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Hemel Hempstead,
17.75km 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 Great Linford to Hemel Hempstead levelling line. The surveyor's description was OSBM Bolt on parapet of bridge over stream, SW side of road at junction of NW end of parapet & hedge.
Logged Visits
Logged on 16th February 2008 by dal. Condition: Good.
Just where the description says it should be. In summer, a hedge could make it a bit harder to see.
Location
Grid reference: SP 9230 1997.
Landranger 165: Aylesbury & Leighton Buzzard, Thame & Berkhamstead.
Structure: Bridge.
Waypoint: OS0229.
Neighbouring Flush Brackets
| 821 | Slapton Lock House 635.06m to the northeast. |
| G3272 | Horton 718.47m to the south. |
| 822 | Horton - Bridge 121 935.20m to the southeast. |
| 820 | Slapton, Bridge 118 980.05m to the north. |
| G3271 | Orton Road 1.76km 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 parapet of bridge over stream, SW side of road at junction of NW end of parapet & hedge.
Logged Visits
Logged on 16th February 2008 by dal. Condition: Good.
Just where the description says it should be. In summer, a hedge could make it a bit harder to see.
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