The Rhine River’s water level at a key waypoint is set to decline in the coming days, curbing the amount of cargo that barges can carry. The measured level at Kaub, which lies to the west of Frankfurt, is forecast to fall as low as 71 centimeters (28 inches) early Monday morning, according to German government data . At 40 centimeters or below, it becomes uneconomical for many barges to haul cargo through this part of the river. Snaking roughly 800 miles from Switzerland to the North Sea, the Rhine is used to ship millions of tons of vital commodities through inland Europe, including coal, oil products and iron ore, as well as goods in containers. The water at Kaub recently fell as low as 30 centimeters, before jumping to 128 centimeters earlier this week. The level is not the actual depth of the river, but rather a measure […]