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OSBM Bolt 
OSBM Bolt on boulder [3GL] - presumably replaced in 1978 by new Bolt nearby.
Location
Grid reference: NC 2331 3095.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Boulder.
Waypoint: OS1842.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Laxford Bridge,
15.78km 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 on boulder.
Location
Grid reference: NC 2331 3095.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Boulder.
Waypoint: OS1842.
Neighbouring Flush Brackets
| G1823 | Kylesku Hotel 2.90km to the north. |
| G1822 | Eilean na Rainich 3.32km to the north. |
| G1926 | Kylestrome 3.69km to the north. |
| G1809 | Inchnadamph Hotel 9.50km to the south. |
| S7856 | Lochmore Lodge 10.22km 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 boulder.
If you have any corrections or additions to this record, please let us know.