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OSBM Bolt 
OSBM Bolt on concrete block, 8' NW of hedge junction, NE side of road [3GL].
Location
Grid reference: SK 8708 2326.
Landranger 130: Grantham, Sleaford & Bourne.
Structure: Concrete block.
Waypoint: OS0689.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Waltham-on-the-Wolds,
6.34km to the west.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Castor to Waltham on the Wolds levelling line. The surveyor's description was OSBM Bolt on concrete block, 8' NW of hedge junction, NE side of road.
Location
Grid reference: SK 8708 2326.
Landranger 130: Grantham, Sleaford & Bourne.
Structure: Concrete block.
Waypoint: OS0689.
Neighbouring Flush Brackets
| 1237 | Buckminster 1.00km to the east. |
| 1238 | Sproxton, Woodbine Cottage 1.33km to the northwest. |
| 1236 | Buckminster, School House 1.61km to the southeast. |
| 1239 | Sproxton, Bakery 1.88km to the northwest. |
| 1235 | Sewstern, Main Street 2.56km 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 Castor to Waltham on the Wolds levelling line. The surveyor's description was OSBM Bolt on concrete block, 8' NW of hedge junction, NE side of road.
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