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OSBM Bolt 
OSBM Bolt on boulder [3GL]; OSBM BOLT BOULDER SE SIDE OF RD 16.4M NE FENCE JUNC.
Location
Grid reference: NH 3528 0484.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Boulder.
Waypoint: OS1383.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Tarff,
8.34km 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 boulder.
Location
Grid reference: NH 3528 0484.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Boulder.
Waypoint: OS1383.
Neighbouring Flush Brackets
| G1044 | Railway Cottage 1.05km to the southwest. |
| G1045 | Bridge of Oich 2.10km to the southwest. |
| G1043 | Loch Uanagan Farm 3.28km to the northeast. |
| G1042 | Fort Augustus 5.03km to the northeast. |
| G1046 | Invergarry, Telephone Exchange 5.68km 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 boulder.
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