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OSBM Bolt 
OSBM Bolt on living rock [3GL]; OSBM BOLT LIVING ROCK NW SIDE RD 8.0M SW FENCE JUNC.
Location
Grid reference: NH 3263 0204.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Rock outcrop.
Waypoint: OS1382.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Tarff,
12.13km 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 Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on living rock.
Location
Grid reference: NH 3263 0204.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Rock outcrop.
Waypoint: OS1382.
Neighbouring Flush Brackets
| G1045 | Bridge of Oich 1.80km to the northeast. |
| G1046 | Invergarry, Telephone Exchange 1.91km to the southwest. |
| G1044 | Railway Cottage 2.81km to the northeast. |
| G1047 | North Laggan 4.25km to the southwest. |
| G1048 | Laggan 5.53km to the southwest. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on living rock.
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