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OSBM Bolt 
OSBM Bolt on parapet of bridge, over centre of stream, SE side of road.
Location
Grid reference: ST 4312 5770.
Landranger 172: Bristol & Bath, Thornbury & Chew Magna.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Unknown.
Waypoint: OS0423.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Flax Bourton,
16.06km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the North Petherton to Flax Bourton levelling line. The surveyor's description was OSBM Bolt on parapet of bridge, over centre of stream, SE side of road.
Location
Grid reference: ST 4312 5770.
Landranger 172: Bristol & Bath, Thornbury & Chew Magna.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Unknown.
Waypoint: OS0423.
Neighbouring Flush Brackets
| G2521 | Sidcot 327.57m to the southwest. |
| G2520 | By Winscombe 1.79km to the southwest. |
| G2256 | Churchill 2.86km to the northeast. |
| G2519 | Cross, Telephone Exchange 2.97km to the south. |
| S6644 | Axbridge, Town Hall 3.16km to the south. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the North Petherton to Flax Bourton levelling line. The surveyor's description was OSBM Bolt on parapet of bridge, over centre of stream, SE side of road.
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