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Flush Bracket OSBM 999: Alder Bourne Bridge   

Flush Bracket on brickwork of bridge over Alder Bourne [2GL] - FB reported destroyed.

Location
Grid reference: TQ 0363 8470.
Landranger 176: West London, Rickmansworth & Staines.
Explorer 172: Chiltern Hills East.
Structure: Bridge.
Waypoint: FB999.

Neighbouring Flush Brackets
998 Rusholt House 886.45m to the north.
1001 Iver Heath 1.02km to the southwest.
1002 Iver Heath, Village Hall 1.44km to the southwest.
997 Denham 1.83km to the north.
1003 Warren Farm 2.18km to the southwest.
The nearest fundamental bench mark is Windsor Castle, 9.99km to the southwest.

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 111.8200 feet [34.0827 metres] above mean sea level (Newlyn datum). It was included on the Hemel Hempstead to Windsor Castle levelling line. The surveyor's description was Flush Bracket on brickwork of bridge over Alder Bourne.

Logged Visits
Visited on 18th March 2009 by AndyG. Condition: Couldn't find it.
Shown on the 1925 Buckinghamshire 1:10,560 south west of the water on a south east face south east of the road surface ie on the 'outside' of the bridge.
There is a disused bridge south east of the modern bridge whose position,by comparing the modern and 1925 maps,agrees with that of the old bridge.
This is metal but the lead up ramps are faced with brick.
From remaining traces there were no brick parapets but metal posts with tubular railings through.
I have searched as much of the brickwork as I can but the ground level has built up with leaves etc and in places trees have grown against the wall.
Nothing found.
Is there any more information on the 'FB reported destroyed' in the description?
If you have any corrections or additions to this record, please let us know.
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