OSBM Bolt: Earith Sluice 

OSBM BOLT EARITH SLUICE S SIDE RD - levelled 1962 (tertiary).
Location
Grid reference: TL 3888 7481.
Landranger 142: Peterborough, Market Deeping & Chatteris.
Landranger 143: Ely & Wisbech, Downham Market.
Structure: Unknown.
Waypoint: OS2271.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Wicken,
15.54km to the east.
Location
Grid reference: TL 3888 7481.
Landranger 142: Peterborough, Market Deeping & Chatteris.
Landranger 143: Ely & Wisbech, Downham Market.
Structure: Unknown.
Waypoint: OS2271.
Neighbouring Flush Brackets
| 1204 | Earith Bridge 461.74m to the east. |
| 1203 | Earith, School 471.70m to the west. |
| S8239 | Earith, The Hermitage 474.34m to the east. |
| 1205 | Fen Barn 2.01km to the east. |
| S8403 | Willingham West Fen Engine 2.21km to the southeast. |
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