India's first riverine lighthouses planned on Brahmaputra

Four solar-powered "Deepstambh" lighthouses on National Waterway-2 become the first lighthouse navigation aids ever raised on an Indian inland waterway.

What happened

• Foundation stones were laid for four river lighthouses along the Brahmaputra — the first time lighthouse infrastructure is being built on an inland waterway in India, rather than along the sea coast.
• The ceremony was held at Lachit Ghat, Guwahati, jointly organised by the Directorate General of Lighthouses and Lightships (DGLL) and the Inland Waterways Authority of India (IWAI), both under the Ministry of Ports, Shipping and Waterways (MoPSW).
• The four sites lie on Brahmaputra (National Waterway-2): Bogibeel (Dibrugarh), Pandu (Kamrup Metro) and Silghat (Nagaon) on the south bank, and Biswanath Ghat (Biswanath) on the north bank.
• Combined outlay is about ₹84 crore; each structure is to be completed within 24 months of contract award.
• The push answers a 53% surge in cargo on the Brahmaputra waterway in FY 2024–25 (per IWAI), and is meant to enable safe round-the-clock — including night — navigation on a river that until now lacked fixed lit navigation marks.
• Each lighthouse is being styled a "Deepstambh" and is designed to double as a riverfront tourism landmark, not merely a utilitarian beacon.

Background & context

A lighthouse is a fixed, lit aid to navigation — a tall tower carrying a strong light (and increasingly electronic signalling) that tells a vessel where it is and where the hazards are. In India these have historically been a maritime asset: rings of coastal lighthouses guiding ships into harbours and warning them off shoals along the seaboard. Raising them on a river is the new element here. The Brahmaputra is a large, braided, shifting river whose channels migrate and whose sandbars (chars) move season to season; a vessel moving cargo at night has had no fixed lit reference. The four Deepstambh towers are intended to supply exactly that fixed reference.

The project sits inside India's wider effort to revive inland water transport (IWT) as a cheap, low-emission freight mode alongside road and rail. The legal backbone is the National Waterways Act, 2016, which declared 111 inland waterways as National Waterways and consolidated earlier piecemeal declarations into a single statute. Of these, the Brahmaputra between Dhubri and Sadiya is National Waterway-2 (NW-2), running 891 km — the longest continuously navigable stretch of any single Indian waterway. (By comparison, NW-1 is the Ganga–Bhagirathi–Hooghly system, Prayagraj–Haldia, the most heavily developed waterway; NW-3 is the West Coast Canal in Kerala, the first national waterway to get full fairway facilities.) Two agencies share the work: IWAI develops and maintains the waterways and their fairways, and DGLL supplies the aids to navigation. The two formalised this division for NW-2 through an MoU signed on 8 April 2025, after which the four sites were handed to DGLL under Right of Use agreements in June 2025.

It helps to keep the two builders straight because UPSC routinely tests the agency–function pairing. IWAI is the body charged with the regulation and development of inland waterways for shipping and navigation; it surveys channels, runs dredging to keep a minimum depth (the fairway), builds terminals and jetties, and fixes river training works. It is the agency whose mandate now spans the country's network of over 20,000 km of navigable waterways. DGLL, by contrast, is the statutory authority for general aids to navigation — lighthouses, lit and unlit beacons, buoys, radio aids and vessel-traffic signals. Historically its writ ran along India's 11,098 km coastline, marking the approaches to ports and the hazards along the sea. The Brahmaputra project is the first time that coastal mandate is being carried inland onto a river, which is precisely what makes these the "first riverine lighthouses". The distinction matters for the common confusion the topic invites: IWAI makes the channel usable; DGLL marks it so vessels can find it in the dark. Neither one alone delivers night navigation — both are needed, and the new MoU is what stitches their roles together on NW-2.

The siting is deliberate. Three of the four towers — Pandu, Silghat and Bogibeel — sit on the south bank, with only Biswanath Ghat on the north bank, tracing the busiest reaches of the river as it runs west to east across the Assam valley. Pandu (in Guwahati, Kamrup Metro) is the river's principal cargo terminal; Bogibeel (Dibrugarh) is well known for the long rail-cum-road bridge over the Brahmaputra; Silghat (Nagaon) and Biswanath Ghat anchor the central stretch. Together they break the 891 km route into lit segments rather than leaving one continuous dark run, so a vessel always has a fixed reference within range — recall the 14 nautical mile geographical range and 8–10 nautical mile luminous range per tower.

For Prelims

• The four sites: Bogibeel (Dibrugarh), Pandu (Kamrup Metro), Silghat (Nagaon) — south bank — and Biswanath Ghat (Biswanath) — north bank. Three south, one north.
• Waterway: Brahmaputra = National Waterway-2 (NW-2), Dhubri → Sadiya, 891 km, the longest navigable stretch of any Indian waterway.
• Builders / chain: DGLL + IWAI, both under the Ministry of Ports, Shipping and Waterways. DGLL is the statutory authority for aids to navigation; IWAI is the statutory authority that develops India's national waterways network of over 20,000 km.
• Specifications: each tower 20 m tall · geographical range 14 nautical miles · luminous range 8–10 nautical miles · solar-powered.
• Outlay & timeline: ~₹84 crore combined; completion within 24 months of contract award. MoU IWAI–DGLL signed 8 April 2025; sites transferred under Right of Use in June 2025.
• Trigger: a 53% rise in cargo on the Brahmaputra in FY 2024–25; the corridor serves Assam's tea, coal and fertiliser traffic.
• Dual use: each site adds a museum, amphitheatre, cafeteria, children's play area, souvenir shop and landscaped public spaces — a navigation aid plus a riverfront tourism node.
• Brand name: the project's lighthouses are called "Deepstambh" (literally "lamp-pillar"/light-tower).
• What it is NOT: these are not coastal/sea lighthouses and not a new port — they are inland-waterway (riverine) navigation aids, the first of their kind in India. DGLL's older mandate covers the country's 11,098 km coastline; this is its first extension onto a river. The structures do not by themselves dredge or deepen the channel — fairway/dredging is IWAI's separate job; the lighthouses only mark it.
• The set it belongs to (national waterways for "how many / match the pairs"): NW-1 Ganga (Prayagraj–Haldia, most developed); NW-2 Brahmaputra (Dhubri–Sadiya — this one); NW-3 West Coast Canal (Kerala); NW-4 Krishna–Godavari (Andhra/Telangana); NW-5 Brahmani–Mahanadi delta (Odisha); declared under the National Waterways Act, 2016.

Why it matters

The problem the project addresses is plain: cargo on the Brahmaputra has been climbing fast, but a vessel could not safely run the river after dark because there was no fixed lit reference on a channel that physically moves. Without night navigation, a waterway can only carry traffic for part of the day, which caps how much freight it can absorb and makes inland water transport less competitive against road and rail. Lit aids that allow 24×7 navigation directly raise the usable capacity of NW-2 and lower the per-tonne cost of moving Assam's tea, coal and fertiliser — and, by extension, of trade with the landlocked North-East and across the river boundary. Locating the towers at riverfront ghats and bundling them with museums, amphitheatres and public spaces also folds connectivity into tourism and local livelihoods, so a piece of freight infrastructure earns a second return. More broadly, the move shows the lighthouse function migrating from a purely coastal role to an inland one, widening DGLL's remit and signalling that the IWT revival is now serious enough to warrant permanent navigation infrastructure, not just seasonal dredging.

The strategic angle is the North-East. The region is hemmed in by international borders and connected to the rest of India through a narrow land corridor, so a high-capacity river running through the heart of Assam is a logistics asset of the first order. Moving bulk cargo — coal, fertiliser, food grain, over-dimensional project consignments — by water is cheaper and lighter on emissions than trucking it over hill roads, and it eases pressure on the rail and road links that carry the region's traffic. A reliable, all-hours NW-2 also dovetails with the broader sub-regional push to use river and sea routes for trade with neighbouring countries, giving Assam's producers a competitive outlet. Set against the modal economics that IWT advocates cite — water freight costing materially less per tonne-kilometre than road, with a smaller carbon footprint — the lighthouses are a small-capital, high-leverage addition: they do not create the channel, but they unlock the half of the day during which it was previously unusable.

There is also an institutional signal worth noting for revision. Until now a UPSC aspirant could safely answer that lighthouses in India are a coastal, maritime feature under DGLL. That generalisation is now incomplete: the correct, current statement is that DGLL's aids-to-navigation mandate has been extended for the first time from the coastline to an inland waterway. It is exactly the kind of "first" that anchors a factual question, and pairing it with the NW-2 identity (Dhubri–Sadiya, 891 km) and the agency split (IWAI builds the channel, DGLL marks it) covers the cluster of facts an examiner can pull from this single development.

For Mains

Related: Inland Waterways Authority of India (IWAI) · National Waterways Act, 2016 · Economy & Finance — this week's cards