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Waltham on the Wolds Fundamental Bench Mark   


Location
Grid reference: SK 8111 2539.
Landranger 130: Grantham, Sleaford & Bourne.
Explorer 247: Grantham.
GPS network passive station: H1SK8125.
Waypoint: FM0527.

Neighbouring Flush Brackets
1243 Waltham on the Wolds, Bescaby Lane 624.26m to the southwest.
1390 Waltham on the Wolds, High Street 678.01m to the southwest.
1389 Waltham on the Wolds, Goadby Road 968.40m to the west.
2073 Bescaby 1.22km to the northeast.
1242 Stonesby, Methodist Church 1.43km to the southeast.
The nearest fundamental bench mark is Navenby, 39.60km to the northeast.

Second Geodetic Levelling, England & Wales (1912-21)
This fundamental bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 559.7450 feet [170.6103 metres] above mean sea level (Newlyn datum). It was included on the Castor to Waltham on the Wolds, Melbourne to Waltham on the Wolds and Waltham on the Wolds to Navenby 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 559.7450 feet [170.6103 metres] above mean sea level (Newlyn datum). It was included on the Castor to Waltham on the Wolds and Waltham on the Wolds to Melbourne levelling lines.

Logged Visits
Visited on 20th April 2014 by RogerTempleman. Condition: Slightly damaged.
The central dome is set on top of a concrete cylinder enclosed by mass of concrete. The whole remains as described by others. Photo showing the mark at http://www.geograph.org.uk/photo/3982806 with wider view at http://www.geograph.org.uk/photo/3982814

Visited on 7th May 2012 by Calico. Condition: Slightly damaged.

Visited on 10th January 2012 by wrose. Grid reference: SK 81116 25395. Condition: Slightly damaged.
Visited today whilst in the area visiting some of the local trig pillars. Some damage to the edges presumably as a result of grass cutting. Now well camoflaged with a covering of moss.
http://www.geograph.org.uk/photo/2760094

Visited on 3rd September 2011 by Brisey. Condition: Damaged.
This FBM is getting worse, a lot of damage showing especially on the N and W side, presumably from trimming or mowing, which has also taken away the OS notice. The bolt top has been scraped and no height plate remains, although the lettering HEIGHT ABOVE DATUM remains as it's part of the bolt casting. The ground level is steadily swallowing this mark. See http://trigpointinguk-photos.s3.amazonaws.com/089/P89765.jpg and P89766 and P89767 for photos.

Visited on 25th October 2005 by RodS. Grid reference: SK 81114 25394. Condition: Slightly damaged.
A very curious object, unlike any other FBM I have seen. It looks as if a large concrete block may perhaps have been constructed around the original granite pillar. The central bolt certainly appears to be a normal (though well worn) FBM height bolt, but without a height plate. The damaged plastic ring which had presumably formed part of a cover was lying loose beside the FBM but fitted snugly back on. Has a GPS plaque, but no sign of the "Ordnance Survey B M" plate which is usual on FBMs.
If you have any corrections or additions to this record, please let us know.
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