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OSBM Bolt 
OSBM Bolt on concrete block, S side of road, 26' E from hedge junction.
Location
Grid reference: SN 3573 1938.
Landranger 159: Swansea & Gower, Carmarthen.
Structure: Concrete block.
Waypoint: OS0577.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Carmarthen,
8.84km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Carmarthen to Haverfordwest levelling line. The surveyor's description was OSBM Bolt on concrete block, S side of road, 26' E from hedge junction.
Location
Grid reference: SN 3573 1938.
Landranger 159: Swansea & Gower, Carmarthen.
Structure: Concrete block.
Waypoint: OS0577.
Neighbouring Flush Brackets
| S7954 | Grandstand 312.57m to the east. |
| S7953 | Llethrach Chapel 727.80m to the west. |
| S7952 | Sarnau 1.95km to the west. |
| S7955 | Travellers' Rest 2.52km to the east. |
| S7956 | Pontgarreg 3.54km to the east. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Carmarthen to Haverfordwest levelling line. The surveyor's description was OSBM Bolt on concrete block, S side of road, 26' E from hedge junction.
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