Rhine bottleneck slows BASF

The Rhine has always been more than scenery for German industry. It is the working river that links the North Sea ports to the factories of southern Germany, carrying the raw materials that keep plants running. This week, that system narrowed to a figure that looks almost absurd: 5 centimetres.

That was the gauge reading at Kaub on 17 August, a tight stretch of the Middle Rhine that has become the river’s critical choke point. It was a new record low (Netz-Trends, ELWIS). The reading does not mean the Rhine is only 5 cm deep. The riverbed lies below the gauge’s zero mark, so vessels can still move. But the gauge decides how much cargo a barge can carry safely. At 5 cm, the answer is very little.

How shallow water breaks a chemical plant

BASF has begun throttling plants at Ludwigshafen, Europe’s largest integrated chemical complex. The site operates as a "Verbund": one unit’s waste or byproduct becomes another unit’s feedstock. When everything moves, the model is highly efficient. When one input is short, the weakness travels through the system.

The missing inputs are the sort that usually arrive by barge: methanol, butane, propane and ammonia (BC Insight). A barge that would normally carry about 1,200 tonnes is now taking roughly 350. That means more journeys for less material, and there is a limit to what lorries and trains can replace.

FAZ reported that BASF had already reduced output at its first Ludwigshafen plants, though it did not identify which ones. Chief executive Markus Kamieth confirmed on 17 August that the company could not fully meet delivery obligations for some products (Reuters).

The clearest signal is legal rather than rhetorical. BASF has issued force majeure notices, formal declarations telling customers that an extraordinary event is preventing full contractual delivery. In mid-July, it declared force majeure on two plasticisers, the chemicals that make plastics flexible, at Ludwigshafen (ICIS). Separately, it issued notices on surfactants, used in detergents and industrial cleaning, from other European sites, all citing Rhine logistics constraints (C&EN).

Who pays along the corridor

BASF is the name that draws attention, but the strain runs along the corridor. Covestro, which makes precursors for foams used in mattresses and refrigerators, declared force majeure at Dormagen on the Lower Rhine. It said raw-material flows were "significantly restricted" and that road and rail could not fully make up the gap (MarketScreener, Reuters).

Dutch inland-shipping sources say barges still passing through Kaub are carrying about 30-35% of their normal load (Schuttevaer). The mechanism is straightforward: the same cargo needs more trips, so the cost per tonne rises. That cost then moves down the chain to whoever buys what the barges carry. In Belgium, construction firms reported surcharges of €17 per tonne on gravel, with barges needing four journeys for loads that once took one (Gazet van Antwerpen).

Real damage, bounded damage

The IfW Kiel institute estimates that Rhine low water could cost €1-2 billion in lost value added in the third quarter. Value added means the output generated by firms along the corridor, rather than retail sales. That would shave 0.1-0.2 percentage points off German GDP (Zeit). With German quarterly growth running near 0.2%, even the lower estimate would eat most of a quarter’s expansion.

Kamieth said the situation was less severe than the 2018 Rhine drought (Reuters). The Kaub gauge, however, did not fall as low as 5 cm in 2018 (Netz-Trends). The likely distinction is duration and spread: 2018 lasted longer and affected a wider area, while this episode is deeper at the bottleneck but, so far, shorter.

The evidence is now specific. Low water on the Rhine has moved from a shipping headache to a production constraint for chemical companies on the river, especially between Kaub and Ludwigshafen. Trucks, trains and lightly loaded barges can spread the shortage around. They cannot recreate the capacity of a full river.