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Railway Structures
Black Potts Viaduct and Bridge

Black Potts Bridge
Black Potts Bridge, photographed on 21st March 2008.

photograph by Gregory Beecroft

Black Potts bridge comprises four 70 feet spans carrying the Windsor branch over the River Thames. The piers comprise cast iron cylinders enclosed by brickwork with masonry cutwaters. The first pier from the Datchet end is on an island in the river. The original spans were cast-iron arches, one of which failed on 14th August 1849, just before the line was due to open. This was caused by settlement of one of the piers. Passenger trains ran to Datchet from 22nd August, but not to Windsor until 1st December 1849, after the bridge had been repaired and strengthened.

All of the arches were replaced in 1892 by wrought iron plate girders.

photograph by Gregory Beecroft

Black Potts Bridge
 
Black Potts Bridge There is a segmental brick arch over the tow path at the Windsor end of the bridge.

photograph by Gregory Beecroft

Black Potts Viaduct, a short distance towards Datchet, originally carried the line over a loop off the river, but has been utilised to take a major flood relief channel under the railway. The Jubilee River, completed in 2002, runs from upstream of Maidenhead to downstream of Windsor and was constructed for the Environment Agency. Black Potts Viaduct comprises thirteen quite small, segmental arches in yellow brick. The Jubilee River utilises the middle nine arches. A concrete slipway has been built through the viaduct and the piers have been encased in concrete.

Black Potts Viaduct, photographed on 21st March 2008.

photograph by Gregory Beecroft

Black Potts Viaduct
 
Black Potts Viaduct Black Potts Viaduct.

photograph by Gregory Beecroft

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