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OSBM Bolt 
OSBM Bolt on culvert.
Location
Grid reference: NC 5296 0215.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Culvert.
Waypoint: OS2018.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Lairg (1946),
6.75km 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 Lairg levelling line. The surveyor's description was OSBM Bolt on culvert.
Location
Grid reference: NC 5296 0215.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Culvert.
Waypoint: OS2018.
Neighbouring Flush Brackets
| G1919 | Achuirghill 3.72km to the west. |
| G1920 | Claonel 4.41km to the northeast. |
| G1918 | The Firs 4.67km to the west. |
| G1851 | Achinduich 5.59km to the southeast. |
| G1850 | Lairg, Station 5.59km to the east. |
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 on culvert.
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