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OSBM Bolt 
OSBM Bolt on bridge parapet [3GL]; OSBM BOLT BR NW PARA C PIER NW SIDE RD.
Location
Grid reference: NC 9155 0670.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Bridge.
Waypoint: OS1958.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Helmsdale,
15.06km 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 Helmsdale to Tain levelling line. The surveyor's description was OSBM Bolt on bridge parapet.
Location
Grid reference: NC 9155 0670.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Bridge.
Waypoint: OS1958.
Neighbouring Flush Brackets
| G2017 | Kintradwell Farm 1.38km to the northeast. |
| G2018 | Dalchalm 1.75km to the southwest. |
| G2020 | Brora, Railway Station 2.74km to the south. |
| G2007 | Allt Choll 3.10km to the northeast. |
| G1997 | Lothbeg 4.58km 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 Helmsdale to Tain levelling line. The surveyor's description was OSBM Bolt on bridge parapet.
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