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OSBM Bolt 
OSBM Bolt in rock [3GL].
Location
Grid reference: NC 2091 3523.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1847.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Laxford Bridge,
11.81km to the north.
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 2091 3523.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1847.
Neighbouring Flush Brackets
| G1926 | Kylestrome 1.38km to the southeast. |
| G1822 | Eilean na Rainich 2.21km to the southeast. |
| G1823 | Kylesku Hotel 2.52km to the southeast. |
| 12126 | Drumbeg Hotel 9.09km to the west. |
| S7857 | Achfary 9.47km to the northeast. |
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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