1GL Bolt: Wembdon, Church 

Wembdon Church. Bolt in jamb of door of tower in West face ; 1.50 ft. above surface [1GL, Bridgewater to Plymouth, Branch Levelling from Mark No. 6]; BOLT BUTT WEMBDON CH W FACE 3.0M SW ANG (8.8849m ODN, 0.5 AGL).
Location
Grid reference: ST 2892 3795.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Church.
Waypoint: BT0717.
Neighbouring Bench Marks
The nearest fundamental bench mark is North Petherton,
4.69km to the south.
First Primary Levelling, England & Wales (1840-60)
This bench mark was used during the First primary levelling, England & Wales, and was levelled with a height of 29.3640 feet [8.9501 metres] above mean sea level (Liverpool datum). It was included as a side level on the Bridgewater to Plymouth levelling line. The surveyor's description was Wembdon Church. Bolt in jamb of door of tower in West face ; 1.50 ft. above surface.
Location
Grid reference: ST 2892 3795.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Church.
Waypoint: BT0717.
Neighbouring Bench Marks
| BOLT | Bridgwater, St Mary's Church 1.30km to the southeast. |
| BM | Bridgwater, St Mary's Church 1.30km to the southeast. |
| BOLT | Bridgwater, St John's Church 1.51km to the southeast. |
| BOLT | North Petherton, Church 4.93km to the south. |
| RIVET | Hinkley Point, Tide Gauge Aux 1 11.63km to the northwest. |
First Primary Levelling, England & Wales (1840-60)
This bench mark was used during the First primary levelling, England & Wales, and was levelled with a height of 29.3640 feet [8.9501 metres] above mean sea level (Liverpool datum). It was included as a side level on the Bridgewater to Plymouth levelling line. The surveyor's description was Wembdon Church. Bolt in jamb of door of tower in West face ; 1.50 ft. above surface.
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