1GL Bolt: North Petherton, Church   

Bolt in buttress on West side of North Petherton Church ; 2.90 ft. above surface [1GL, Bristol to Plymouth, Mark No. 98]; Bolt in buttress N. side of North Petherton Church [2GL]; PA BOLT ST MARYS CH NORHT PETHERTON NW ANG N FACE (height 37.1033m ODN, 1.6m AGL).

Location
Grid reference: ST 2901 3302.
Landranger 182: Weston-super-Mare, Bridgwater & Wells.
Structure: Church.
Waypoint: BT0643.

Neighbouring Bench Marks

BOLT	Bridgwater, St Mary's Church 4.05km to the north.
BM	Bridgwater, St Mary's Church 4.05km to the north.
BOLT	Bridgwater, St John's Church 4.50km to the north.
BOLT	Wembdon, Church 4.93km to the north.
RIVET	Hydrographic Taunton, GPS WM2 8.84km to the southwest.

The nearest fundamental bench mark is North Petherton, 581.38m 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 121.9460 feet [37.1691 metres] above mean sea level (Liverpool datum). It was included on the Bristol to Plymouth levelling line. The surveyor's description was Bolt in buttress on West side of North Petherton Church ; 2.90 ft. above surface.

Second Geodetic Levelling, England & Wales (1912-21)
This bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 121.7630 feet [37.1134 metres] above mean sea level (Newlyn datum). It was included as a side level on the North Petherton to Dulverton levelling line. The surveyor's description was Bolt in buttress N. side of North Petherton Church.