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OSBM Bolt 
OSBM Bolt in rock [3GL].
Location
Grid reference: NC 2749 1002.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS2002.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ledmore,
4.55km to the northwest.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ledmore to Lairg levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: NC 2749 1002.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS2002.
Neighbouring Flush Brackets
| G4385 | Altnacealgach Hotel 1.20km to the northwest. |
| G1882 | Altnacealgach Hotel 1.26km to the northwest. |
| G1881 | Ledmore 3.50km to the northwest. |
| G1883 | Allt Eileag Bridge 4.49km to the southeast. |
| G1880 | Elphin School 6.28km to the west. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ledmore to Lairg levelling line. The surveyor's description was OSBM Bolt in rock.
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