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OSBM Bolt 
OSBM Bolt on living rock [3GL].
Location
Grid reference: NT 3973 3709.
Landranger 73: Peebles, Galashiels & Selkirk, Tweed Valley.
Structure: Rock outcrop.
Waypoint: OS1349.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Innerleithen,
8.38km to the northwest.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Innerleithen to Hawick levelling line. The surveyor's description was OSBM Bolt on living rock.
Location
Grid reference: NT 3973 3709.
Landranger 73: Peebles, Galashiels & Selkirk, Tweed Valley.
Structure: Rock outcrop.
Waypoint: OS1349.
Neighbouring Flush Brackets
| G295 | Holylee 791.77m to the northwest. |
| G4409 | Gatehopeknowe Bridge 1.11km to the northwest. |
| G296 | Thornylee 1.72km to the southeast. |
| G294 | Walkerburn 3.57km to the west. |
| G317 | The Nest 3.81km to the southeast. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Innerleithen to Hawick levelling line. The surveyor's description was OSBM Bolt on living rock.
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