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OSBM Bolt 
OSBM Bolt on wall [3GL]; OSBM BOLT OLD CONCRETE CUL SE SIDE RD 2.2M SW JUNC FENCE BR PARA.
Location
Grid reference: NN 2438 9007.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Culvert.
Waypoint: OS1375.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Spean Bridge,
8.57km 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 Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on wall.
Location
Grid reference: NN 2438 9007.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Culvert.
Waypoint: OS1375.
Neighbouring Flush Brackets
| G1050 | Letterfinlay 1.66km to the northeast. |
| G1051 | Rathliesbeag 5.97km to the southwest. |
| G1052 | Allt Mairi 7.11km to the southwest. |
| G1053 | Spean Bridge 8.62km to the south. |
| G1054 | Inverroy 8.71km 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 Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on wall.
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