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OSBM Bolt 
OSBM Bolt in rock [3GL]; OSBM BOLT ROCK 2.0m S FENCE CNR.
Location
Grid reference: NH 2265 1059.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Rock outcrop.
Waypoint: OS1671.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Glen Cluanie,
16.82km to the west.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Glen Cluanie to Glen Moriston levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: NH 2265 1059.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Rock outcrop.
Waypoint: OS1671.
Neighbouring Flush Brackets
| G4531 | Loch Cluanie Dam 4.31km to the west. |
| G4532 | Achlain 5.45km to the east. |
| G4533 | By Dalchreichart 6.82km to the east. |
| G1775 | Allt-a-Bhiora Bridge 8.21km to the south. |
| G1774 | Ardochy 8.52km 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 Glen Cluanie to Glen Moriston levelling line. The surveyor's description was OSBM Bolt in rock.
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