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The '''Upper Sone Bridge, Dehri''' was part of [[East Indian Railway]]'s [[Grand Chord EIR Line| 'Grand Chord Line ']]. The bridge crosses the River Sone at [[Dehri-on-Sone,]] about halfway between [[Moghal Serai ]] and [[Gaya]]on the ‘[[East Indian Railway]]’(EIR). It carries a double broad gauge([[Rail_gauge#Broad_Gauge|Grand Chord LineBG]]) line.

The Gover|nment Government finally authorised the project ‘Grand Chord’project in 1895 and construction commenced. The major works on the line were the [[Upper ‘Upper Sone BridgeBridge’, Dehri]], tunneling tunnelling and ghat line construction <ref >[http://www.gracesguide.co.uk/East_Indian_Railway:_Grand_Chord Grace's Guide " The Grand Cord"]; Retrieved 12 Jun 2016</ref>.The

The ‘Upper Sone Bridge’ opened on 27 Feb 1900. The total length of the Upper Soane Bridge across the Soane, (as the river was then called), over abutments is 3,064 metres (10,052 ft). When it was built, it was the longest bridge in India and was believed to be the second longest bridge in the world <ref name=USBridge/>. ==Design and Construction==[[File:Upper Sone Bridge, Dehri.png|600px|centre| Upper Sone Bridge]]The Engineers for this bridge were the [[Rendel, Palmer and Tritton Partnership]]<ref name=Dorman>[https://dormanlongtechnology.com/Download_files/DL%20Historical/Dorman%20Long%20bridges%201930%20book.pdf Dorman Long and Co ‘Bridges’ 1930 Edition, pages 54-55]; Retrieved 26 Nov 2020</ref>. The bridge consists of 93 openings, each of 100 foot(30.5mtr) clear and there are two complete separate sets of girders supported on the same piers. One of these sets was supplied by Dorman Long, Middlesbrough, England. This set was of the deck type, each span weighing approx 95 tons, giving a total weight of nearly 9000 tons. The bearings were at 105 foot (32mtr) centres<ref name=Dorman/> and a total length of 10,052 feet (3km) <ref name=USBridge/> [[Alexander Meadows Rendel]] was the EIR Consulting Engineer <ref >[http://www.gracesguide.co.uk/Alexander_Meadows_Rendel Grace's Guide "Alexander Meadows Rendel"]; Retrieved 12 Jun 2016</ref> and was responsible for the construction of the [[Upper ‘Upper Sone Bridge, Dehri|Upper Sone Bridge]] Bridge’ which was completed in 1900 <ref name=USBridge>

[[Frederick Palmer]] was the EIR District Engineer on surveys and construction. He was responsible for the construction of the line, which was commenced in 1896 and completed in 1900, and included the ‘Upper Sone Bridge of ninety-six 100-ft. spans-Bridge’,the longest bridge in India <ref>[http://www.gracesguide.co.uk/Frederick_Palmer Graces Guide "Frederick Palmer"]; Retrieved 12 Jun 2016</ref>. The Upper Sone Bridge opened on 27 Feb 1900. The total length of the Upper Soane Bridge across the Soane, as the river was then called, over abutments is 3,064 metres (10,052 ft). When it was built, it was the longest bridge in India and was believed to be the second longest bridge in the world <ref name=USBridge/>.