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OSBM Bolt 
OSBM Bolt in rock.
Location
Grid reference: ND 0974 2127.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Rock outcrop.
Waypoint: OS1947.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Helmsdale,
8.28km 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 Lybster to Helmsdale levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: ND 0974 2127.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Rock outcrop.
Waypoint: OS1947.
Neighbouring Flush Brackets
| G2097 | Ousdale School 2.45km to the west. |
| G2096 | Berriedale, Ivy Cottage 2.54km to the northeast. |
| G2095 | Borgie, Sunnybrae 3.24km to the northeast. |
| G2094 | Newport, Borgue Old School 4.83km to the northeast. |
| G2093 | Rhian Cottage (A9) 5.85km 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 Lybster to Helmsdale levelling line. The surveyor's description was OSBM Bolt in rock.
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