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OSBM Bolt 
OSBM Bolt on bridge abutment [3GL].
Location
Grid reference: NH 2324 1114.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Bridge.
Waypoint: OS1672.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Glen Cluanie,
17.39km 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 on bridge abutment.
Location
Grid reference: NH 2324 1114.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Structure: Bridge.
Waypoint: OS1672.
Neighbouring Flush Brackets
| G4532 | Achlain 4.72km to the east. |
| G4531 | Loch Cluanie Dam 4.97km to the west. |
| G4533 | By Dalchreichart 6.13km to the east. |
| G4534 | Allt an Lagain Bhain Bridge 8.07km to the east. |
| G1775 | Allt-a-Bhiora Bridge 8.79km 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 on bridge abutment.
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