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OSBM Bolt 
OSBM Bolt on concrete block SE side of road, 29' NE from hedge junction.
Location
Grid reference: SN 3897 1939.
Landranger 159: Swansea & Gower, Carmarthen.
Structure: Concrete block.
Waypoint: OS0575.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Carmarthen,
6.23km 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 SE side of road, 29' NE from hedge junction.
Location
Grid reference: SN 3897 1939.
Landranger 159: Swansea & Gower, Carmarthen.
Structure: Concrete block.
Waypoint: OS0575.
Neighbouring Flush Brackets
| S7956 | Pontgarreg 335.41m to the northeast. |
| S7955 | Travellers' Rest 754.32m to the west. |
| G5042 | Carmarthen, Old Llanstephan Road 1.06km to the east. |
| G5041 | Hafod wen 1.50km to the southeast. |
| S0641 | Carmarthen, St David's Church 1.72km 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 SE side of road, 29' NE from hedge junction.
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