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Thornham Fundamental Bench Mark   


Location
Grid reference: TF 7316 4270.
Landranger 132: North West Norfolk, King's Lynn & Fakenham.
Explorer 250: Norfolk Coast West.
GPS network passive station: H1TF7342.
Waypoint: FM0546.

Neighbouring Flush Brackets
G4047 Thornham, The Stables 570.09m to the north.
G3212 Thornham, Red Brick Farm 659.24m to the north.
S0132 Thornham 713.09m to the north.
G3211 Beacon Hill 862.84m to the south.
G1231 Titchwell 2.41km to the northeast.
The nearest fundamental bench mark is North Pickenham, 39.23km to the south.

Second Geodetic Levelling, England & Wales (1946-51)
This fundamental bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 100.2646 feet [30.5607 metres] above mean sea level (Newlyn datum). It was included on the Navenby to Thornham and Thornham to Gimingham levelling lines.

Third Geodetic Levelling, England & Wales (1950-68)
This fundamental bench mark was used during the Third geodetic levelling, England & Wales, and was levelled with a height of 100.3108 feet [30.5747 metres] above mean sea level (Newlyn datum). It was included on the North Pickenham to Thornham, Thornham to Gimmingham and Thornham to Navenby levelling lines.

Logged Visits
Visited on 23rd January 2016 by jonglew. Grid reference: TF 73168 42704. Condition: Slightly damaged.
On field side of hedgerow, a little awkward gaining access from the handy layby. Scaffold-type railings, some damage to top screed and height tag missing. Photos at:
http://www.jonglew.com/Walking/TrigPoints/2016/20160123-ThornhamNorfolkFBM1.jpg
http://www.jonglew.com/Walking/TrigPoints/2016/20160123-ThornhamNorfolkFBM2.jpg

Visited on 11th November 2014 by wrose. Grid reference: TF 73163 42705. Condition: Good.
In field corner. In metal railed compound but very overgrown.
http://www.geograph.org.uk/photo/4291543

Visited on 8th October 2014 by Dusty. Condition: Good.
Photo at http://www.geograph.org.uk/photo/4224125

Visited on 6th June 2007 by asteroth. Grid reference: TF 7316 4270. Condition: Slightly damaged.
Found it at last.O/S sketch and photo out of date.Very overgrown and farm track exits @100m S.through hedge .Not visible from overgrown lay-by.
If you have any corrections or additions to this record, please let us know.
admin@bench-marks.org.uk