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OSBM Bolt: Lonning 
OSBM Bolt on concrete block, 5' SE of hedge, NW side of road, 36' SW from angle of hedges, Lonning.
Location
Grid reference: NY 3920 5050.
Landranger 85: Carlisle & Solway Firth, Gretna Green.
Structure: Concrete block.
Waypoint: OS0029.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Wetheral,
7.46km 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 Cockermouth to Wetheral levelling line. The surveyor's description was OSBM Bolt on concrete block, 5' SE of hedge, NW side of road, 36' SW from angle of hedges, Lonning.
Location
Grid reference: NY 3920 5050.
Landranger 85: Carlisle & Solway Firth, Gretna Green.
Structure: Concrete block.
Waypoint: OS0029.
Neighbouring Flush Brackets
| S8309 | Pow Bank 809.20m to the southwest. |
| S8310 | Durdar 1.27km to the northeast. |
| S8308 | Orchard House 1.83km to the southwest. |
| S8307 | Dalston, Barras House 2.36km to the west. |
| G3390 | Green Marsh 2.57km to the east. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Cockermouth to Wetheral levelling line. The surveyor's description was OSBM Bolt on concrete block, 5' SE of hedge, NW side of road, 36' SW from angle of hedges, Lonning.
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