![Digswell Viaduct, [DE/Gr/27] | Hertfordshire Archives and Local Studies](https://www.ourwelwyngardencity.org.uk/wp-content/uploads/cms/Digswell_Viaduct_complete.jpg "Digswell Viaduct, [DE/Gr/27]")
This viaduct, 1,545 feet long and 97 feet high at the centre of its 40 arches, is a wonderful monument to the engineering of the railway age.
Built to carry the Great Northern railway over the Mimram Valley, it was designed by William Cubitt, the architect of Kings Cross station, and the project was managed by the engineer Thomas Brassey. It cost £69,397 to build and is estimated to contain over 13 million bricks all of which were made very near to the viaduct itself. It was opened by Queen victoria on 6 August 1850.
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Where is the plaque and it be seen close up