OSBM Bolt   

OSBM Bolt on SE parapet of bridge over SW bank of stream, Brick Yard Rhyne.

Location
Grid reference: ST 3019 4370.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Unknown.
Waypoint: OS0421.

Neighbouring Flush Brackets

G2514	Pawlett, Post Office 920.71m to the south.
G2247	Huntspill 1.40km to the northeast.
357	Black Ditch Bridge 1.52km to the east.
358	Withy Bridge 2.08km to the northeast.
356	Dunball Pottery Siding Signal Box 2.80km to the southeast.

The nearest fundamental bench mark is North Petherton, 10.56km to the south.

Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the North Petherton to Flax Bourton levelling line. The surveyor's description was OSBM Bolt on SE parapet of bridge over SW bank of stream, Brick Yard Rhyne.