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OSBM Bolt 
OSBM Bolt on culvert, E side of Grange Gardens, 20' S of road A129.
Location
Grid reference: TQ 7983 9153.
Landranger 178: Thames Estuary, Rochester & Southend-on-Sea.
Structure: Other.
Waypoint: OS0107.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Hatfield Peverel,
20.32km to the north.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Hatfield Peverel to Snodland levelling line. The surveyor's description was OSBM Bolt on culvert, E side of Grange Gardens, 20' S of road A129.
Location
Grid reference: TQ 7983 9153.
Landranger 178: Thames Estuary, Rochester & Southend-on-Sea.
Structure: Other.
Waypoint: OS0107.
Neighbouring Flush Brackets
| G2430 | Rayleigh, Pearson's Avenue 120.42m to the northeast. |
| G1669 | Rayleigh 1.13km to the southeast. |
| S1032 | Rayleigh 1.14km to the southeast. |
| S1031 | Rayleigh 1.15km to the southeast. |
| G1668 | Carpenter's Arms PH 1.60km 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 Hatfield Peverel to Snodland levelling line. The surveyor's description was OSBM Bolt on culvert, E side of Grange Gardens, 20' S of road A129.
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