In 1984/85 a much needed by-pass was built with a continuous viaduct accross
both Bedford rivers and the Washes. Seen here in 2011 with Old Bedford River in
foreground.
Railway
Background
For more than 160 years trains have trundled across the washes on a series of bridges and viaducts and an embankment.
In 1836 the Eastern Counties Railway (ECR) was incorporated and authorised to build a line from London to Norwich,
Yarmouth and Ipswich. In 1844 Parliament gave the Company
permission to build a line across the Fens from Ely
to Peterborough. Despite the soft peat soil, the line was built in just 10 months
opening to goods traffic in December 1846 and to passengers in January 1847.
The construction contract was given to Grissell and Peto under the direction of
Robert Stephenson.(source:
LNER
Encyclopedia)
By 1862 the ECR had acquired most of the other railways in East Anglia and
adopted the name Great Eastern Railway (GER).
In 1923 GER was absorbed into the new London and North Eastern
Railway (LNER) which began a massive modernisation of its infracture. The works
included rebuilding and/or improving bridges on the line across the Washes
during 1924-28.
In 1947 LNER was nationalised and became part of the new British Railways, later re-named
British Rail. In 1994 the railways were re-privatised, and infrastructure
responsibity passed to Railtrack. After a series of disasters (elsewhere) and financial difficulties Railtrack was would-up
in 2002 and its duties taken over by the Government controlled Network Rail.
The line is double track, non-electricfied. There are bridges across three
rivers: Counter Drain, The Delph and The New Bedford; and a road bridge over the
Hundred Foot Bank. In the Washes, the line between the Delph and New Bedford has
a viaduct at each end and a central
embankment.
Some signs of the original works remain. See the slideshow, link from menu bar

construction works in 1920s
photos from Pymoor Archives

above viaduct over washes, below steel through-truss bridge over the New Bedford River

bridge over the B 1411 Hundred Foot Bank road design similar to viaduct sections
many more photos on
railway slideshow
Salter's Lode
Sutton Fen, Jolly Bankers
Sutton Gault
New Bedford River
Photo: Peter Cox, Apr 2011
Photo: Peter Cox, Apr 2011
Causeway and raised footpath across Washes

water level gauge reads up to 4.2m
Photo: Peter Cox, Apr 2011
Old Bedford River
Photo: Peter Cox, Apr 2011
Photo: Peter Cox, Apr 2011
Welches Dam
Welmore Lake
Welney
Gardner's 1851 History of Cambridgeshire & Isle of Ely, page 566: "bridge over Old Bedford is cast iron, the Delph bridge is timber"

The earlier cast iron bridge, below,

was recorded in Gardner's 1851 History
of Cambridgeshire and Isle of Ely

The foundations of the cast iron bridge are clearly visible under the current bridge (see also right column)

or are there two lots of previous foundations, one wider than the other?
Old Bedford River
Photos of Cast Iron bridge courtesy of The Welney Website; all others: Peter Cox, May 2011
Delph River
Photos: Peter Cox, May 2011

A water level gauge reads up to 6m a metre higher than any others I've found in the Washes.
The plastic pipe looks like it might contain part of a sophisicated electronic system for measuring water level or flow, with readings sent to the EA control centre via telemetry.
For more information see
Telemetry
The underside was much as expected.

except for one or two things:

birds nest

lager bottle carefully disposed of

some corrosion

box of tricks part of telemetry system? click to see the full system.
Photos: Peter Cox, Jun 2011
New Bedford (Hundred Foot) River at Suspension Bridge
Aerial photo: courtesy of Dick Fiske, Jun 2005

Looking southwest from east bank
Photo: Peter Cox, Jun 2011

Looking north from east bank
Photo: Peter Cox, Jun 2011