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OSBM Bolt: Ord Burn Bridge 
OSBM Bolt on bridge parapet; OSBM BOLT BR PARA SW BANK ORD BURN SE SIDE.
Location
Grid reference: ND 0521 1815.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Bridge.
Waypoint: OS1951.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Helmsdale,
2.92km 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 on bridge parapet.
Location
Grid reference: ND 0521 1815.
Landranger 17: Helmsdale & Strath of Kildonan.
Structure: Bridge.
Waypoint: OS1951.
Neighbouring Flush Brackets
| G2097 | Ousdale School 3.17km to the northeast. |
| G1987 | Helmsdale, Church 3.53km to the southwest. |
| G1988 | Helmsdale, Church 3.91km to the southwest. |
| G1989 | Portgower, Old School House 6.59km to the southwest. |
| G2096 | Berriedale, Ivy Cottage 8.04km 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 on bridge parapet.
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