# India (Finally) Finished its Impossible Bridge ![[images/India-Finally-Finished-its-Impossible-Bridge.webp]] **Creator:** The B1M · **Published:** 2026-01-26 · **Length:** 14:09 · [Watch on YouTube](https://www.youtube.com/watch?v=O-9WRcYlu7g) > Caption source: YouTube **manual English (UK)** captions (`en-GB`), downloaded with **yt-dlp**. The first request hit an HTTP 429, and a spaced retry about 30 s later succeeded. The manual track covers the whole video, including the **Odoo** sponsor read (about 4:25–5:31), so the auto track was not needed. TubeAlfred was not used (0 credits). The manual track is the script and may differ slightly from what is spoken in places. **Companion article:** [India Built the World's Most Remote Bridge](https://www.theb1m.com/video/india-built-the-worlds-most-remote-bridge) on theb1m.com, by **James Rabey** (26 January 2026; "Video hosted and narrated by Fred Mills"). It matches the video closely, gives the bridge's height as **359 metres** above the river, says "nearly 30,000 tons" of steel and dates the opening to "the summer of **2025**". Names and figures were also cross-checked against India's Press Information Bureau ([2021 arch-completion release](https://www.pib.gov.in/PressReleseDetailm.aspx?PRID=1709652); [6 June 2025 inauguration release](https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=2134513)). The PIB confirms the **1,315 m** length, **467 m** main arch span, **28,660 t** of fabricated steel, **26 km** of roads and a **266 km/h** (about 165 mph) design wind speed. It also names the designers: **WSP (Finland)** for the viaduct and foundations and **Leonhardt, Andrä und Partner (Germany)** for the arch, with **COWI (UK)** as proof consultant for the superstructure. The video credits the arch to "the WSP team in Finland" (12:06). The PIB rates the steel for **−10 °C to 40 °C**, while the video says site temperatures reach 50 °C. The caption spells the COWI engineer "David Mackenzie" and the article spells him "MacKenzie". The narration was partly written while the bridge was being built (for example "is being constructed", 2:38, and "the worksite in 2020", 5:35), then updated for the 2025 opening. YouTube chapters are used as section headings and line up with the captions. Screenshots come from the 720p stream (format 136). Host: **Fred Mills**. Interviewee: **David MacKenzie** (COWI). Paid promotion: **Odoo** (accounting app; free first app via the description link). The description also plugs Fred's book ***Mega Builds*** (pre-order), **Get Construction Talking** and *The World's Best Construction Podcast*. Additional footage and images: **Trimble**, **Narendra Modi**, **Afcons**, **Lalit Kumar Rawal**, **The Print**, **Megha Engineering and Infrastructures Ltd**, **The Indian Express**, **North Geographic**, **Gyan Tokri** and **Jean-Yves Fouchecourt**. A **BBC News** article and a news clip ("World's highest arch bridge set to open in Kashmir") also appear on screen. ## Outline ### 0:00 Intro - **0:02** "This is somewhere no human-being was meant to go." Deep in the **foothills of the Himalayas** near **Reasi**, temperatures swing from **50 °C** down to **freezing**. - **0:18** Jagged cliff faces form deep, dangerous **canyons**: imagine trying to build a **world-record-breaking bridge** here. - **0:30** To reach civilisation you trek **dusty tracks on foot** or take a **boat along the river**. Just getting to the **Chenab Bridge** site was a huge job, "let alone manoeuvring the **30,000 tons of steel**" it needed. - **0:49** "No motorways, no nearby factories and not a flat, stable surface in sight": construction in "one of mother nature's most unforgiving environments". ![[images/India-Finally-Finished-its-Impossible-Bridge-t0003.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0038.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0055.webp]] ### 1:05 Nightmarish conditions - **1:04** "It might sound cliche", but building Chenab Bridge "should have been **impossible**." - **1:12** Searing heat, ice and snow are hard on the crews, and on the steel too: it **expands and shrinks** with temperature, making it hard to handle and line up accurately. - **1:31** The bigger threat is the **wind**: the canyon sees gusts of up to **165 mph**. That is extremely dangerous for people working hundreds of metres up while moving **thousands of tons of steel**. - **1:55** Even on a calm day, an **earthquake** could shake the ground. - **2:03** All of this pales next to the main challenge: **getting to the site at all**. - **2:18** **David MacKenzie**, senior technical director at **COWI**, involved since **2004**: on the first visit "**donkeys were provided** to help us get up the stream", and they came back **by boat** because it was quicker than the "tortuous mountain paths". ![[images/India-Finally-Finished-its-Impossible-Bridge-t0072.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0100.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0118.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0140.webp]] ### 2:40 Why build the bridge - **2:38** Imagine you are in **Jammu** and want to reach the **Kashmir Valley**. Mountains separate them, and the one main artery, **National Highway 44**, is **regularly blocked by snow**. - **2:54** Chenab Bridge is one section of India's new **169-mile all-weather rail line**, cut "quite literally through the mountains". - **3:06** Not everyone supports it. **Kashmir** is an area of high political tension and **one of the most militarised zones in the world**, **divided between India and Pakistan**. - **3:24** India says the line will bring an **economic boost** and better travel links; **opponents** say it is a way of **exerting more control** over the region. ![[images/India-Finally-Finished-its-Impossible-Bridge-t0163.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0178.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0195.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0210.webp]] ### 3:36 Building Chenab Bridge - **3:36** Construction ploughed on regardless. The line has **943 bridges and 36 tunnels**, one about **7 miles** long, and reportedly costs "a mere **$5 billion**". - **3:53** For context, in **New York** $5 billion buys **two miles of the Second Avenue Subway**. - **4:03** With projects costing billions or even trillions, it is easy to lose perspective, and "balancing those chequebooks would bring most of us out in a cold sweat." - **4:25** Sponsor segment (**Odoo**, about 4:25–5:31). Odoo is an all-in-one business platform with **45 apps**. Its accounting app offers unlimited invoices, bank sync with automatic reminders to late payers, AI recognition of supplier invoices, dashboards and local tax compliance, and the first app is free with unlimited hosting and support. "From managing your money to managing a mega-bridge in the Himalayas, let's get back to Chenab." - **5:35** The worksite in **2020**: there are **fabrication workshops on both sides of the canyon**, unusual for a modern site. Normally key parts are **prefabricated in distant factories**, but that was not possible here. - **6:04** How did **30,000 tons of steel** get there? Crews built **26 km of roads** just for this project, in precarious places "clinging to the side of mountains" along cliff edges. - **6:26** Steel is most efficient to transport as **flat plate**: "think of it as an **IKEA catalogue**". Everything arrived **flat-packed**, and all the **cutting and drilling was done on site**. - **6:41** Then comes building it **hundreds of metres above** a giant canyon. The jagged, rocky, river-split topography is "nothing short of a nightmare". - **7:02** The **wind**, because of the **Venturi effect**: a narrow canyon becomes a giant **funnel**. As wind speeds up, its pressure drops, creating powerful, **chaotic patterns**. - **7:24** **Geology**: the Himalayas are **very young and still moving**, pushed up by the **Indian and Eurasian plates** colliding. The rock along the canyons is **fractured and friable**. - **7:40** A canyon is roughly **V-shaped**. A tower fixed to one sloping side, especially in unstable rock, tends to **slide down the valley**, "which is why Chenab Bridge is an **arch** design." - **7:57** The arch starts at both ends, and the halves meet in the middle to form a **locked shape**. They push against each other, sending the weight down through the legs **into the mountain**. - **8:10** Wind testing used a roughly **1:50 scale model** in a wind tunnel, but the unusual terrain called for "more drastic research". - **8:31** MacKenzie: **localised physical and computational tests** modelled the surrounding hills and valleys to work out **locally accelerated flows**. With **20% acceleration**, a maximum of **50 m/s** becomes **60–70 m/s**. These studies were "very important to the design". - **9:08** To build the arch, crews first put up a **cable crane**, "a bit like an **aerial trapeze** or a **monorail made of cables**", strung between **towers on each side** of the canyon. Steel pieces were **winched across** into position. - **9:27** Each half of the arch was built **from the bottom upwards**, held back by **cables anchored in the rock** to stop it toppling **nearly 400 metres** into the river. Once the halves met, "hey presto, you have an arch." - **9:40** The arch carries the whole structure but is not yet fit for trains. Once the **supporting towers** are up, the heavy **top deck** goes on in sections. - **9:58** From each side, one deck section is laid and the next is **pushed in behind it**, and so on, until the deck has been **pushed out across the canyon** and the two sides meet: a **launch methodology** (incremental launching). ![[images/India-Finally-Finished-its-Impossible-Bridge-t0228.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0245.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0335.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0350.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0385.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0420.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0445.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0485.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0520.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0545.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0590.webp]] ### 10:15 Seismic challenges - **10:16** The structure is so big that the earthquakes usually felt here "shouldn't be too much of an issue". That is by design, not luck: engineers knew the area is **seismically active**. - **10:33** MacKenzie: ground shaking is a **fixed amount**, say **±10 cm**, so relative to a huge span it is small. **Halve the span** and the relative shaking **doubles**; double a **100 m** bridge to **200 m** and the effect shrinks. Earthquakes therefore matter less for the **main arch** but still affect **all of the approach structures**. ![[images/India-Finally-Finished-its-Impossible-Bridge-t0605.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0625.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0650.webp]] ### 11:10 Battling the sun - **11:03** The **top deck** must stay stable for train safety. A key threat, "although maybe less so in the UK", is **the sunshine**. - **11:20** Temperatures from freezing to **50 °C** affect the steel of the arch. In a canyon the sun only reaches **parts of the bridge at a time**, so different sections sit at **different temperatures**. - **11:42** As the arch warms and cools it **bends and flexes**, "not great for moving trains". - **11:48** The fix: the rails are **pre-stressed** (pulled tight) and **sit loose in their fixings**, so they can **slide back and forth** as the bridge moves. ![[images/India-Finally-Finished-its-Impossible-Bridge-t0680.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0695.webp]] ### 12:04 An impressive accomplishment - **12:06** Designed (the video says) by the **WSP team in Finland**, the arch and its towers loom over the **Chenab River**. The rock and steel blend into the mountains and give "some of the best train passenger views on the planet". - **12:19** MacKenzie: of all the structures he has worked on, this one holds "particular passion" after **20 years** of seeing it rise from the ground and how well it was **fabricated in the yard**. It is the challenge he is most interested in, and he keeps a picture of it on his **laptop** to look at every day. - **12:52** The line was **inaugurated in summer last year** (2025) as India "begins its next chapter of connectivity". Chenab may be the most impressive of the country's many rail projects. - **13:06** Crews built "where no one has built before". **More than 20 years** after construction began, after delays, **boat journeys and donkey treks**, **cable cranes** and **miles of purpose-built roads**, they found a way. - **13:30** Chenab is "the perfect example" of the hardships of building in **extraordinary environments**. Projects like this "pave the way for future generations". - **13:53** Outro: thanks to sponsor **Odoo** and a call to subscribe to "the definitive video channel for construction". ![[images/India-Finally-Finished-its-Impossible-Bridge-t0730.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0760.webp]] ![[images/India-Finally-Finished-its-Impossible-Bridge-t0785.webp]] ## Things mentioned ### Bridges and infrastructure - **Chenab Bridge** (Chenab Rail Bridge), Reasi district, Jammu and Kashmir: the **world's highest railway arch bridge**, **359 m** above the river (companion and PIB). It is **1,315 m** long with a **467 m** main arch span (PIB) and used nearly **30,000 tons** of steel (PIB: 28,660 t). It was **inaugurated on 6 June 2025** by Prime Minister **Narendra Modi** (PIB). - **India's all-weather rail line to Kashmir**, 169 miles in the video: the **Udhampur–Srinagar–Baramulla Rail Link (USBRL)**, with **943 bridges** and **36 tunnels** (one about 7 miles long). Reported cost about **$5 billion**. - **National Highway 44**: the main road link between Jammu and the Kashmir Valley, often blocked by snow - **Second Avenue Subway**, New York: the cost comparison ($5 billion for about two miles) - **26 km of purpose-built access roads**; **on-site fabrication workshops** on both sides of the canyon - **Anji Bridge**: India's first cable-stayed rail bridge, opened alongside Chenab on 6 June 2025 (PIB; not in the video) ### Places - **Reasi**, the **Himalayan foothills**, the **Chenab River**, **Jammu**, the **Kashmir Valley** - **Kashmir**, divided between **India** and **Pakistan**; **New York**; **Finland** (WSP); the **UK** (the sunshine joke) ### Engineering - **Steel arch** built out from both sides and **locked** at the crown, with weight carried down the legs into the rock - **Cable crane** (an "aerial trapeze" or "monorail made of cables") and **back-stay cables anchored in the rock** - **Incremental launching** of the deck ("launch methodology") - **Flat-plate steel** delivery with on-site cutting and drilling ("IKEA catalogue") - **Venturi effect** in the canyon; **1:50 wind-tunnel model**; local **physical and computational** wind modelling (20% acceleration: 50 m/s becomes 60–70 m/s) - **Seismic design**: fixed ground displacement (±10 cm) matters less on a long span than on the approach structures - **Thermal movement**: uneven sun on the arch, **pre-stressed rails** and **free-sliding rail fixings** - **Geology**: the young, still-rising Himalayas from the **Indian–Eurasian plate collision**; fractured, friable rock; towers on V-shaped slopes tending to slide ### Politics and society - **Kashmir**: high political tension and one of the most militarised zones in the world. India pitches the line as an **economic boost**, while **opponents** see it as a way of **exerting control** over the region. ### People and organisations - **Fred Mills** (host); **David MacKenzie** (COWI, senior technical director) - **COWI**; **WSP** (Finland); **Afcons** (footage; contractor in the Ultra–Afcons–VSL joint venture according to the PIB) - **Leonhardt, Andrä und Partner** (arch designer according to the PIB; not named in the video); **Konkan Railway Corporation** and **Northern Railway** (executing agency and client according to the PIB) - Footage credits: Trimble, Narendra Modi, Afcons, Lalit Kumar Rawal, The Print, Megha Engineering and Infrastructures Ltd, The Indian Express, North Geographic, Gyan Tokri, Jean-Yves Fouchecourt - On-screen media: **BBC News** ("A new Kashmir rail bridge that could be a game-changer for India") and a news clip ("World's highest arch bridge set to open in Kashmir") - **James Rabey**: author of the theb1m.com companion article ### Sponsor and The B1M - **Odoo**: sponsor (all-in-one business platform with 45 apps; accounting app with invoicing, bank sync, AI invoice recognition and tax compliance; first app free) - ***Mega Builds*** (Fred's book, pre-order); **Get Construction Talking**; *The World's Best Construction Podcast* ### Figures and facts - Temperatures from freezing to 50 °C; gusts up to 165 mph; nearly 400 m from the arch to the river below (359 m deck height according to the companion and PIB) - 30,000 tons of steel; 26 km of roads; 169-mile line; 943 bridges; 36 tunnels; about $5 billion - MacKenzie involved since 2004; worksite shown in 2020; line inaugurated in summer 2025; "more than 20 years" from start to finish - **Since the video** (PIB): designed for a 120-year life and 100 km/h; cuts Katra–Srinagar travel to about 3 hours by Vande Bharat train ## Biographies ### Fred Mills Co-founder and on-camera host of **The B1M**. He presents the Chenab Bridge as construction at its most extreme: getting to the site, the wind, the rock and the sun. He sets the politics of Kashmir next to the engineering and ends with a tribute to the crews who "found a way". His book ***Mega Builds*** is plugged in the description. ### David MacKenzie Senior technical director at the engineering consultancy **COWI**, involved with the Chenab Bridge since **2004** (COWI was the proof consultant for the viaduct and arch superstructure, according to the PIB). In the video he recalls reaching the site by donkey and boat. He explains the local wind modelling and why large spans are less sensitive to earthquakes, and he calls the bridge a personal passion that he keeps on his laptop to look at every day. ### James Rabey Writer at **The B1M** and author of the companion article *[India Built the World's Most Remote Bridge](https://www.theb1m.com/video/india-built-the-worlds-most-remote-bridge)* (26 January 2026), which follows the video's script and adds image captions and the 359-metre height. ### Narendra Modi **Prime Minister of India**, who inaugurated the Chenab and Anji bridges on the USBRL on **6 June 2025** (PIB). His official channels are credited for footage and images in the video and the article.