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OSBM Bolt 
OSBM Bolt on culvert [3GL]; OSBM BOLT CUL NW SIDE RD C DRAIN 4.7M SW PRODN FENCE OPP.
Location
Grid reference: NN 3093 9973.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Culvert.
Waypoint: OS1381.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Tarff,
14.91km 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 culvert.
Location
Grid reference: NN 3093 9973.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Culvert.
Waypoint: OS1381.
Neighbouring Flush Brackets
| G1047 | North Laggan 1.38km to the southwest. |
| G1046 | Invergarry, Telephone Exchange 1.45km to the north. |
| G1048 | Laggan 2.67km to the southwest. |
| G1045 | Bridge of Oich 4.67km to the northeast. |
| G1044 | Railway Cottage 5.66km 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 culvert.
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