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OSBM Bolt 
OSBM Bolt on step at junction of footpath, 24' SE from junction of fence & 18' NE from SW side of Watling Street.
Location
Grid reference: TQ 6632 7028.
Landranger 177: East London, Billericay & Gravesend.
Landranger 178: Thames Estuary, Rochester & Southend-on-Sea.
Structure: Other.
Waypoint: OS0111.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Snodland,
7.80km 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 Hatfield Peverel to Snodland levelling line. The surveyor's description was OSBM Bolt on step at junction of footpath, 24' SE from junction of fence & 18' NE from SW side of Watling Street.
Location
Grid reference: TQ 6632 7028.
Landranger 177: East London, Billericay & Gravesend.
Landranger 178: Thames Estuary, Rochester & Southend-on-Sea.
Structure: Other.
Waypoint: OS0111.
Neighbouring Flush Brackets
| G5148 | Henhurst 724.50m to the southwest. |
| G2436 | Cobham Repeater Station 1.30km to the east. |
| G2435 | Singlewell 1.48km to the northwest. |
| G2437 | Cobham, School 2.02km to the southeast. |
| G2434 | Gravesend, Central Avenue Hotel 2.56km 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 Hatfield Peverel to Snodland levelling line. The surveyor's description was OSBM Bolt on step at junction of footpath, 24' SE from junction of fence & 18' NE from SW side of Watling Street.
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