6 years. But that still seems feasible. The Danube can't take anywhere near the throughput of the Suez Canal, though. The Rhein-Main-Donau canal, one of the bo

6 years. But that still seems feasible. The Danube can't take anywhere near the throughput of the Suez Canal, though. The Rhein-Main-Donau canal, one of the bottlenecks on the route, sees about 6 million tons of shipping a year and can handle boats with a draft of 2 metres.[0] The Suez Canal handles the same tonnage every day and handles ships up to 20m draft. So this would not make a dent in shipping from Suez to Rotterdam, it would just be a nice bonus for anyone delivering from the Med to, say, Belgrade. [0] https://en.wikipedia.org/wiki/Rhine%E2%80%93Main%E2%80%93Danube_Canal https://en.wikipedia.org/wiki/Rhine%E2%80%93Main%E2%80%93Dan...