OSBM Bolt: by Loch Carron   

OSBM BOLT ROCK 3.7M SW FROM SW ANG RLY BLDG SE SIDE RLY (evidently placed for 2GL line Achnasheen to Dornie, but not incorporated, presumably as levelling line diverted).

Location
Grid reference: NG 9031 3705.
Landranger 25: Glen Carron & Glen Affric.
Structure: Rock outcrop.
Waypoint: OS2593.

Neighbouring Flush Brackets

G1931	Oak Bank 2.08km to the northwest.
G1927	Finderne 2.64km to the north.
G1745	Attadale Station 2.95km to the northeast.
G1923	Lochcarron School 3.73km to the north.
G1746	Stromeferry 4.53km to the southwest.

The nearest fundamental bench mark is Dornie, 11.36km to the south.

Second Geodetic Levelling, Scotland (1936-52)
This bench mark was used during the Second geodetic levelling, Scotland. It was included on the Dornie to Achnasheen levelling line.