Water levels at the Kaub chokepoint have fallen to 28 centimeters, the lowest since 2018, and are forecast to reach 24 centimeters on Friday, which would be the lowest since records began in 1990. The cost to ship diesel from Rotterdam to Karlsruhe has climbed to the highest since Bloomberg began compiling the data in 2009, while coal inventories at the Amsterdam-Rotterdam-Antwerp hub have risen about 75% since spring as barge loadings to move those supplies inland have been cut by three-quarters.