OSBM Bolt 

OSBM Bolt in concrete block, 5' NE of hedge on SW side of road, on production of hedges opposite side of road [3GL]; OSBM BOLT CONCRETE BLOCK SW SIDE RD PRODN HEDGE OPP SIDE RD.
Location
Grid reference: SP 9531 1520.
Landranger 165: Aylesbury & Leighton Buzzard, Thame & Berkhamstead.
Structure: Concrete block.
Waypoint: OS0231.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Hemel Hempstead,
12.67km 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 in concrete block, 5' NE of hedge on SW side of road, on production of hedges opposite side of road.
Logged Visits
Logged on 16th February 2008 by dal. Condition: Good.
After a few fruitless prods into the thick vegatation of the verge cum hedge, I noticed what looked like a concrete edge. Excavation revealed it was the concrete block with the Bolt. I left the Bolt clear, but I suspect it will get re-buried.
Location
Grid reference: SP 9531 1520.
Landranger 165: Aylesbury & Leighton Buzzard, Thame & Berkhamstead.
Structure: Concrete block.
Waypoint: OS0231.
Neighbouring Flush Brackets
| G3275 | Down Farm 898.28m to the southeast. |
| G3274 | Ivinghoe 1.23km to the northwest. |
| G3276 | Stocks Farm 2.27km to the southeast. |
| 829 | Tring Cutting - Bridge 134 2.69km to the southwest. |
| 824 | Seabrook Lock Cottage 2.73km 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 in concrete block, 5' NE of hedge on SW side of road, on production of hedges opposite side of road.
Logged Visits
Logged on 16th February 2008 by dal. Condition: Good.
After a few fruitless prods into the thick vegatation of the verge cum hedge, I noticed what looked like a concrete edge. Excavation revealed it was the concrete block with the Bolt. I left the Bolt clear, but I suspect it will get re-buried.
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