Key European shipping corridor hit by river and rail freight ‘double whammy’

Sharply falling water levels on the Rhine in Germany have raised fears of a significant shortage in barge capacity on one of Europe's key shipping corridors, which could trigger serious disruption to supply chains.

It carries some 300 million tons of bulk and containerized goods on a yearly basis, connecting the major ports of Rotterdam and Antwerp, in the Netherlands and Belgium respectively, with Germany’s industrial heartlands.

Western Europe recorded its hottest-ever temperatures in June and is currently experiencing its third heatwave in the space of six weeks. Prolonged periods of extreme heat – around 104F – and near-zero rainfall, have resulted in drought conditions in many areas. And the Rhine, Europe’s single-most important inland waterway artery - particularly the middle section flowing through Germany – has not been spared.

When water levels recede, barges are forced to reduce the amount of cargo they can transport, driving up freight rates and limiting volumes of a broad range of commodities ranging from coal, steel, food and automotive parts. In the summer of 2022, a drought almost brought commercial traffic on the Rhine to a halt.

‘Barges Are Carrying Much Less Cargo’

Climatological analysis suggests that major low-water disruptions are increasing in frequency and longer in duration when they occur.

“The impact (of the current drought) is significant but it's important to put it into perspective. Navigation is currently still possible on the Rhine. It has not stopped. But barges are carrying much less cargo,” commented Hester Duursema, Secretary General of the Strasbourg-based General Commission for Navigation of the Rhine in a recent interview with BBC TV News’ Business Daily program.

So Just How Bad is the Situation on The Rhine?

“Comparisons are being drawn with previous years, but I think the sector has become better at anticipating such episodes while forecasting has improved, allowing shippers to plan ahead and buffer their stocks.”

Duursema also pointed to the new barge vessels entering the market having the capability to operate in less deep water.

However, she did not underplay the current challenges highlighting the need for “a lot of rainfall” and indicating that there were few signs of an improvement before August.

Kaub ‘Chokepoint’

Commodity markets analyst Discovery Alert underlined that not all sections of the river carry equal commercial weight.

For example, the gauge station at Kaub, situated along the middle Rhine west of Frankfurt, “holds an outsized role in European commodity markets precisely because it represents the river's most constrained navigable passage. The geology of the riverbed at this location creates a natural bottleneck, and even modest reductions in water depth translate into disproportionately severe restrictions on barge loading capacity.”

Last week, data from Germany's federal waterways and shipping administration showed that water levels at Kaub dropped more than 33% over a four-day period to 78 cm (approximately 31 inches).

For Discovery Alert this represents “a rate of decline that compresses procurement timelines and forces logistics teams into reactive, high-cost decision making almost immediately.”

Forecasts of the Kaub gauge falling to 40 cms in the coming days are particularly alarming for the sector.

Data from tri-modal freight transport operator Contargo shows that the level of Kaub stood at 53 cms on July 13 and is forecasted to decline to 45 cms and 43 cms on July 15 and 16 respectively – triggering higher low-water surcharges for 20-foot and 40-foot containers.

At a depth of 40 cms, the tonnage a barge can safely carry shrinks to levels that make the economics of river freight structurally unworkable, regardless of how urgently the cargo is needed downstream.

“When Kaub water levels approach the 40 cms mark, the Rhine's role as a bulk freight corridor effectively suspends. This is not a gradual degradation – it is closer to a switch being thrown on a significant portion of central Europe's raw material distribution network,” Discovery Alert warned.

‘Shallow Water Destroys Freight Economics’

Its feedback from market participants indicated that under current conditions vessels are capable of loading only around 40% of their standard cargo capacity.

“This single figure restructures the entire freight equation. A single barge voyage that previously moved a full load now requires two to three vessels to replicate the same tonnage. Vessel demand multiplies simultaneously with supply constraints, creating an acute squeeze on available capacity. Each additional voyage compounds fuel, crew, lock transit, and port handling costs across the supply chain. Procurement teams face a choice between paying dramatically elevated freight rates or deferring material inflows entirely.”

Current freight rate data circulating in the market reflects this dynamic. Rates for the Rotterdam-to-Mannheim corridor, a critical artery connecting Europe's largest port to the southern German industrial heartland, have risen to approximately €38 to €42 per tonne (roughly $43 to $48 per tonne).

Furthermore, market participants have reported overall rate increases of 40 to 60% above 'normal' Rhine conditions.

‘Dual-Mode Failure Scenario’

Faced with the prospect of considerably higher shipping costs, forwarders and their shipper customers are quite naturally mulling the possibility of a shift in transport mode, notably to rail, particularly for bulk cargo.

However, such ‘contingency logistics’ would appear to have serious limitations given that Germany’s rail network is presently undergoing a multi-billion-euro overhaul which is causing frequent disruption on major routes.

At the end of last week, major renovation work began on the right bank Rhine railway line between Troisdorf and Wiesbaden, in Germany. It will bring rail traffic to a halt in both directions until mid-December 2026.

During the closure, freight traffic on the western north-south corridor will be largely re-routed via the left bank Rhine railway line, Contargo informed customers in a recent service update.

Due to the longer routes, additional operational requirements and increased network utilization, longer transit times were to be expected.

“In a highly interconnected European rail system, even minor disruptions or capacity bottlenecks can affect numerous transport chains. Against this background, increased operational complexity must be expected throughout the entire construction period. Delays or even cancellations cannot therefore be ruled out,” Contargo added.

For Discovery Alert the current disruption is compounded by a logistical coincidence that has amplified the pressure, for example, on steel feedstock procurement across Germany.

“Rail services, which would ordinarily serve as the primary substitute for waterway transport during Rhine restrictions, are simultaneously experiencing cancellations and capacity shortfalls. The result is a dual-mode failure scenario in which neither of the two dominant bulk transport mechanisms is performing adequately,” it observed.