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OSBM Bolt 
OSBM Bolt in rock [3GL].
Location
Grid reference: NC 2464 1368.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1830.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ledmore,
237.07m to the southwest.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: NC 2464 1368.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1830.
Neighbouring Flush Brackets
| G1881 | Ledmore 1.54km to the south. |
| G1882 | Altnacealgach Hotel 3.43km to the southeast. |
| G4385 | Altnacealgach Hotel 3.46km to the southeast. |
| G1880 | Elphin School 3.49km to the southwest. |
| G1879 | Knockan 4.49km to the southwest. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt in rock.
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