Cut Mark: Gainsborough, Holy Trinity Church   

Old B.M. on W. face of Trinity Church, Gainsborough [2GL]; PORCH HOLY TRINITY CH W FACE 1.5M SW ANG (9.0343m ODN, 0.5m AGL).

Location
Grid reference: SK 8175 8938.
Landranger 112: Scunthorpe & Gainsborough.
Landranger 121: Lincoln & Newark-on-Trent.
Structure: Church.
Waypoint: BM2626.

Neighbouring Bench Marks

BM	Gainsbrough Bridge 424.26m to the southwest.
BM	Saundby, Hall Farm 3.60km to the southwest.
BOLT	Beckingham, All Saints Church 3.97km to the west.
BM	Upton, All Saints Church 5.74km to the southeast.
BM	Blyton, Sandbeck Lane corner 6.24km to the northeast.

The nearest fundamental bench mark is Hibaldstow (1987), 17.01km to the northeast.

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 29.6020 feet [9.0227 metres] above mean sea level (Newlyn datum). It was included as a side level on the Hibaldstow to Matlock levelling line. The surveyor's description was Old B.M. on W. face of Trinity Church, Gainsborough.