Bridge of Orchy Fundamental Bench Mark   

Location
Grid reference: NN 2951 3977.
Landranger 50: Glen Orchy & Loch Etive.
GPS network passive station: H1NN2939.
Waypoint: FM7158.

Neighbouring Flush Brackets

S7769	Achallader, Viaduct 4.85km to the northeast.
S8343	Arrivain 9.37km to the south.
G1185	Tyndrum, Royal Hotel 10.14km to the south.
S7770	Gorton, Signal Box 12.81km to the northeast.

The nearest fundamental bench mark is Crianlarich, 18.31km to the southeast.

Second Geodetic Levelling, Scotland (1936-52)
This fundamental bench mark was used during the Second geodetic levelling, Scotland, and was levelled with a height of 529.8909 feet [161.5107 metres] above mean sea level (Newlyn datum). It was included on the Bridge of Orchy to Arrochar and Loch Leven to Bridge of Orchy levelling lines.

Third Geodetic Levelling, Scotland (1956-68)
This fundamental bench mark was used during the Third geodetic levelling, Scotland, and was levelled with a height of 529.8909 feet [161.5107 metres] above mean sea level (Newlyn datum). It was included on the Bridge of Orchy to Crianlarich and Bridge of Orchy to Loch Leven levelling lines.