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Flush Bracket OSBM 4: Pangbourne, Whitchurch Bridge   

Flush Bracket on Whitchurch Bridge, over River Thames [2GL], also described as "on abutment wall of Whitchurch Bridge over R Thames at Pangbourne" - FB reported destroyed; approximate location of SU 6362 7678 (S end of bridge) now suggested as more likely than SU 6362 7686 (N end of bridge); note that FB is or was below road level.

Location
Grid reference: SU 6362 7678.
Landranger 175: Reading & Windsor, Henley-on-Thames & Bracknell.
Explorer 159: Reading, Wokingham & Pangbourne.
Explorer 171: Chiltern Hills West.
Structure: Bridge.
Waypoint: FB4.

Neighbouring Flush Brackets
G3416 Pangbourne, Little Oaks 800.81m to the south.
5 Basildon, Sot's Hole 1.33km to the west.
G3415 Tidmarsh, Home Farm 2.27km to the south.
G3417 Lower Basildon, Oxford Lodge 2.90km to the northwest.
3 Mapledurham Lock 3.14km to the east.
The nearest fundamental bench mark is Wallingford, 11.46km to the north.

Second Geodetic Levelling, England & Wales (1912-21)
This flush bracket was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 134.1420 feet [40.8865 metres] above mean sea level (Newlyn datum). It was included on the Basingstoke to Wallingford levelling line. The surveyor's description was Flush Bracket on Whitchurch Bridge, over River Thames.

Logged Visits
Visited on 10th June 2013 by jochta. Condition: Unknown.
Whitchurch Bridge is closing in October for reconstruction works (http://www.whitchurchbridge.com/). It is possible that the FB, if it is buried, may be revealed.

Visited on 27th November 2011 by RogerTempleman. Grid reference: SU 6362 7678. Condition: Couldn't find it.
A brief unsuccesful visit without any clear idea where to look given the vagueness of the OS description. Subsequent thoughts with the sketch of the location on the FB register to hand lead me to suggest that the FB was probably on a bankside abutment near to under the cut mark described at http://www.bench-marks.org.uk/bm26554. I therefore suggest the GR quoted is incorrect (to be fair I don't know how that was derived) and suggest something close to the cut mark more likely. There is a chance that the FB still exists despite the OS describing it as destroyed.

Visited on 17th July 2010 by spuduka. Condition: Couldn't find it.
Had a look for this myself though like every one else could see nothing. There is a small arch with retaining walls either side and the mark could be buried under the soil that has built up there.

Visited on 25th February 2007 by lackofluke. Condition: Probably destroyed.
I couldn't find it either. Not listed on OS benchmarks site.

Visited on 14th August 2004 by jochta. Condition: Couldn't find it.
Couldn't find the FB anwhere accessible on the bridge. It could be buried or hidden somewhere. BM not shown on MasterMap.
If you have any corrections or additions to this record, please let us know.
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