Bogibeel Bridge Carries Two Rail Lines Beneath a Three-Lane Road Across 4.94 km of the Brahmaputra, and Opened on 25 December 2018 as India's Longest Rail-Cum-Road Bridge

The Bogibeel Bridge across the Brahmaputra is 4.94 km long and carries two broad-gauge rail lines on its lower deck and a three-lane road on its upper deck. It joins Dibrugarh on the south bank with Dhemaji district on the north, and the Press Information Bureau (PIB) records that it was dedicated to the nation on 25 December 2018, at a public meeting on the northern bank where the first passenger train was also flagged off. PTI called it the longest rail-cum-road bridge in India. A Northeast Frontier Railway (NFR) spokesman said it cuts the road distance from Dibrugarh to Itanagar by 150 km, and the Ministry of Railways told the Rajya Sabha in November 2019 that it shortened the rail trip from Dibrugarh to Naharlagun by 705 km compared with going via Guwahati.

Two banks, one river crossing

Before the bridge, getting between the two banks around Dibrugarh meant a ferry. Himakshi Das, a Dhemaji resident quoted by the Arunachal Observer in April 2026, described a trip that combined a jeep, a boat and a walk over sandbars and took four hours or more. Autocar Professional’s 2018 explainer says the bridge spared locals the ferry services on the river.

Bogibeel sits about 17 km downstream of Dibrugarh town, according to the NFR spokesman quoted in the India TV report. The NFR, the zonal railway for the region, was entrusted with the project, Indian Infrastructure says. By rail, it connects the Lumding to Dibrugarh section on the south bank with the Rangia to Murkongselek section on the north bank, as Indian Infrastructure magazine describes it. According to the same spokesman, the distance from Dibrugarh to Rangiya falls by 170 km, and the bridge offers a shorter route from Dibrugarh to Delhi and Kolkata along the north bank.

The first passenger train over it was the New Tinsukia to Naharlagun Intercity Express, according to News Bharati and the Sentinel, and Swarajya reported that regular intercity runs began on 26 December 2018. PIB’s December 2025 backgrounder on Indian bridges lists Bogibeel, with the New Saraighat Bridge, as a Brahmaputra crossing that carries both road and rail.

Forty-two wells under 41 girders

Beneath the bridge are 42 well foundations, each shaped like two joined letter Ds, according to Indian Infrastructure. Each well has 3 m thick walls, and the foundation depth is given as 58.6 m, apart from the abutment and shore wells at 42 m and 68.75 m. Twin hollow circular piers, 5.3 m across on the outside, rise from each well.

On the piers sits a double-deck Warren truss, a frame of triangles in steel. When the superstructure contract was awarded in 2011, domain-b described the road level as 10.5 m above the railway line. Indian Infrastructure reports that a design change in October 2015 raised the number of girders from 36 to 41 and added Rs 3 billion (Rs 300 crore) to the cost. India TV separately reports that the total length was revised from the 4.31 km first planned to 4.94 km.

News Bharati quotes NFR as saying this was the first time on Indian Railways that a girder carries a steel floor system for the railway tracks and concrete for the road. Construction World’s project note gives each heavy span a weight of about 1,700 tonnes and says 164 spherical bearings, four to a span, carry them. HCC says the bridge is designed for earthquakes above magnitude 7, and Construction World places the site in Seismic Zone V.

The main steel contractor, HCC, calls it India’s first fully welded Warren truss girder steel bridge. Indian Infrastructure’s account lists about 700,000 high-strength friction-grip bolts among the materials alongside the welding. Both statements are the sources’ own.

Welded on the bank, pulled across the river

A joint venture built the steel superstructure: Hindustan Construction Company (HCC, 51 per cent), the German firm DSD Brouckenbau (20 per cent) and VNR Infrastructures (29 per cent), under a Rs 987 crore (Rs 9.87 billion) order from the NFR in November 2011. That order covered the superstructure only. Indian Infrastructure and NE Now (summarising The Hindu) credit Gammon India with the well foundations and substructure, awarded in April 2008, and RITES with the surveys, soil tests and design.

HCC set up fabrication, assembly and launching yards on the left bank of the river. Construction World’s project note describes the sequence. Plates were cut by machine, welded by gas metal arc welding, and checked by magnetic particle, dye penetration and ultrasonic tests. The fabricated pieces were joined into trusses, a steel nose was fitted to the first truss, and the trusses were pulled out over the piers with hydraulic and strand jacks. A 1,000-tonne jack was among them. The superstructure was pulled in four stages of about ten spans each. HCC’s engineers chose this over floating cranes, and the note says it kept work out of the river and avoided building a large installation on both sides of a river 4.8 km wide.

HCC says this is the world’s longest incrementally launched steel bridge, a claim made by the company in its December 2018 statement and carried by PTI. The company also says the steel was fabricated to the Euro 1090 standard, the European code for steel structures, and that the welders were qualified to European codes. HCC project director R. V. R. Kishore told Construction World that the work involved about 350 qualified welders and 120 engineers. The Hindu, as summarised by NE Now, gave the welder number as 300.

The steel came from three mills

HCC says 80,000 tonnes of steel plate reached the site by rail and road. Construction World names Jindal Steel and Power, Essar and SAIL as the main plate suppliers, and says about a quarter of the load was over-sized cargo that needed special transport from Hazira and Angul. SAIL’s own statement says it supplied around 35,400 tonnes of TMT rebar, plates and structural steel, a little over half of the steel supplied for the bridge. Tata Steel told IANS on the opening day that it provided 15,000 tonnes of rebar, 75 per cent of the rebar used. About three million bags of cement went in, according to Indian Infrastructure.

Copper-bearing steel plates form the superstructure to slow corrosion, HCC says, with a coating system chosen for the region’s humidity. Construction World and Indian Infrastructure give an estimated service life of about 120 years, and Autocar Professional attributes the same figure to SAIL. It is an estimate by the builders and suppliers, not a result of testing.

Five months of working season

Mohinder Singh, the NFR chief engineer, told News Bharati that early floods cut the working season to about five months, from November to March, and that moving concrete across river channels 600 to 900 m wide was the hardest task. Indian Infrastructure says the concrete was pumped through a pipeline laid over buoys, with several pumps in series.

Skilled labour was the other bottleneck. Kishore told Construction World that the team had to keep welders and engineers motivated to stay in a remote area. The NFR hired the inspection firm SGS in April 2014 for third-party checks, and Indian Infrastructure says a team of 21 SGS experts spent four and a half years on site testing welds and other work.

From the Assam Accord to a trial run in 2018

News Bharati and Construction World both tie the project to the Assam Accord of 1985. PTI reports that it was sanctioned in 1997 to 1998, and the sources agree on little else for the first decade.

India TV and the Arunachal Observer say the foundation stone was laid on 22 January 1997, and that work began on 21 April 2002. Indian Infrastructure instead says the Cabinet Committee on Economic Affairs approved the project in September 1997 and gives 22 April 2002 for the foundation stone. Akashvani, India TV and News Bharati all give 21 April 2002 for the start of work. The sources differ on which event counts as the foundation stone, so this article gives each date with its source.

In 2007 the Centre declared Bogibeel a national project, which India TV and the Arunachal Observer say assured funding. The foundation contract went to Gammon India in April 2008 and the superstructure contract followed in November 2011, with 48 months allowed at the time, according to HCC’s president as domain-b quotes him. Akashvani reports that about 13 years after work began, in 2015, the project stood at 72 per cent physical progress. A trial run took place in October 2018, Indian Infrastructure says, and the Prime Minister dedicated the bridge on 25 December 2018 at a public meeting at Kareng Chapori on the north bank, as PIB records.

What it cost, by each source

India TV reports a sanctioned estimate of Rs 3,230.02 crore, for a bridge then planned at 4.31 km. The final figures vary by source:

• The Arunachal Observer’s April 2026 column and The Hindu’s report (as summarised by NE Now) give Rs 4,857 crore.
• Indian Infrastructure gives Rs 5,620 crore (Rs 56.2 billion).
• Autocar Professional says Rs 5,900 crore, and PTI’s report said Rs 59 billion.
• Business Standard, carrying IANS, gives Rs 5,920 crore.
• India TV reports Rs 5,960 crore.
• News Bharati puts it at about Rs 6,000 crore.

That Arunachal Observer column also gives Rs 5,900 crore in a later paragraph, so a single source can carry two figures. Escalation is also stated differently. India TV puts it at 85 per cent, Indian Infrastructure at 74 per cent, and Akashvani says the cost grew five times. The reported total therefore runs from Rs 4,857 crore to about Rs 6,000 crore, and the figures reflect different dates and different scopes of work.

Among the Brahmaputra’s bridges

In Assam, the 9.15 km Dhola-Sadiya bridge was inaugurated on 26 May 2017, and PIB described it as India’s longest bridge. PIB’s December 2018 release calls it the country’s longest road bridge, and Bogibeel is the rail-and-road one. Autocar Professional’s explainer says Bogibeel passed the Digha-Sonpur bridge over the Ganga in Bihar, which that article lists at 4.5 km, as India’s longest rail-cum-road bridge. Akashvani and Autocar Professional also call it Asia’s second longest rail-cum-road bridge, and neither names the longest.

tuput has also covered the Pamban Bridge’s vertical-lift span, the Chenab rail arch and the Howrah Bridge cantilever. The states the bridge links have their own profiles, Assam and Arunachal Pradesh.