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Flush Bracket G3990: St Mellons 
S angle of building, NW side of Newport Road [3GL].
Location
Grid reference: ST 2340 8170.
Landranger 171: Cardiff & Newport, Pontypool.
Structure: Unknown.
Waypoint: FG3990.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Penhow,
21.38km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This flush bracket was used during the Third geodetic levelling, England & Wales. It was included on the Penhow to Cowbridge levelling line. The surveyor's description was S angle of building, NW side of Newport Road.
Location
Grid reference: ST 2340 8170.
Landranger 171: Cardiff & Newport, Pontypool.
Structure: Unknown.
Waypoint: FG3990.
Neighbouring Flush Brackets
| S1317 | St. Mellons, Church 631.35m to the southwest. |
| S1316 | St. Mellons, Bethania Chapel 866.83m to the southwest. |
| G3991 | Llanedeyrn Bridge 1.09km to the northwest. |
| G3989 | By St Mellons 1.33km to the northeast. |
| G3988 | Castleton, Coach & Horses PH 2.73km to the northeast. |
Third Geodetic Levelling, England & Wales (1950-68)
This flush bracket was used during the Third geodetic levelling, England & Wales. It was included on the Penhow to Cowbridge levelling line. The surveyor's description was S angle of building, NW side of Newport Road.
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