Rhine’s 17cm gauge triples freight costs

A barge passing Kaub on the Middle Rhine this week carries a third of what it was built to hold. The gauge at this bottleneck between Koblenz and Mainz reads around 16-17 cm, far below the previous record low of 25 cm set in 2018 (ELWIS, Tagesschau). That number is not the river's total depth. It measures height above a fixed reference point and dictates how deep a loaded vessel can sit. Right now, Europe's busiest inland freight corridor is moving far less cargo at far higher cost.

The Port of Rotterdam counts around 100 extra vessel calls per week, yet total Rhine traffic stays more than 10% below normal (nieuws.nl). More ships, less freight.

How depth becomes cost

Each 10 cm of lost depth strips roughly 100 tonnes from some vessels, Dutch operators told Trouw (Trouw). At Luxembourg's Mertert port, barges designed for 2,000 tonnes were loading just 450-500 tonnes (RTL Infos). Rotterdam-linked vessels that normally load at about 70% are down to 30-35% (Schuttevaer, Transport Online).

The price follows the physics. Shipping a tonne from Rotterdam to Karlsruhe now costs roughly €150-160, up from about €45 in late June (RFI, Breakbulk).

Why trucks and trains cannot fill the gap

A single 3,000-tonne barge replaces roughly 150 trucks (ingenieur.de). Federal Transport Minister Steffen Bilger pushed five German states to ease Sunday truck bans for replacement freight (Zeit). But as BGL's Dirk Engelhardt pointed out, drivers who work Sundays still face EU rest-time rules. A Sunday shift forces compensating rest on other days, so the system gains no extra driving hours overall (ingenieur.de).

Rail cannot take over either. A key Rhine corridor is closed for scheduled maintenance, Kuehne+Nagel warned clients (Kuehne+Nagel). A Czech logistics expert summed it up for iROZHLAS: full substitution is practically unavailable (iROZHLAS).

Who pays

The Rhine connects Rotterdam and Antwerp to chemical plants in Ludwigshafen, steelworks in the Ruhr, and factories reaching into Switzerland. Inland waterways carry the bulk commodities German manufacturing runs on: petroleum products, ores, chemicals and construction materials (Eurostat, Destatis). BASF's Ludwigshafen complex, Europe's largest integrated chemical site, depends heavily on Rhine logistics (C&EN).

The stress reaches beyond Germany. Where the Rhine enters the Netherlands at Lobith, inflow has fallen to around 614-615 m³/s, roughly a third of the normal 1,800-1,900 m³/s (NRC). In Belgium, Flemish construction firms say a barge that normally carries 3,500 tonnes of Rhine sand now loads about 900. Low-water surcharges have hit €8 per tonne for sand and €17 for gravel (GVA).

According to Kiel Institute economist Stefan Kooths, the episode could shave 0.1-0.2 percentage points off German GDP in Q3, roughly €1-2 billion in lost output (Tagesschau). That estimate is provisional, but the scale is plausible given how much industrial throughput rides on the river.

The relative winners are carriers with scarce capacity — hauliers with eligible trucks, operators with low-draft vessels. This is scarcity rent, not economy-wide gain. Consumer prices have not yet moved visibly; the cost squeeze sits with industrial logistics and factory inventories. How long it stays there depends on how long the river stays low. Dutch water authorities have maintained formal drought status since 16 July (Rijkswaterstaat). The corridor now needs more ships, more trucks and more hours to move fewer tonnes. That is not a transport delay. It is a capacity loss.