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OSBM Bolt 
OSBM Bolt on living rock [3GL]; OSBM BOLT ROCK 2.6M NE SIDE RD 41.6M SE CUL.
Location
Grid reference: NC 2398 2972.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1841.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ledmore,
16.26km to the south.
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 on living rock.
Location
Grid reference: NC 2398 2972.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1841.
Neighbouring Flush Brackets
| G1823 | Kylesku Hotel 4.23km to the north. |
| G1822 | Eilean na Rainich 4.65km to the north. |
| G1926 | Kylestrome 5.08km to the northwest. |
| G1809 | Inchnadamph Hotel 8.18km to the south. |
| S7856 | Lochmore Lodge 10.79km 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 on living rock.
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