Q: How does the Three Gorges ship lift work?

A: The Three Gorges ship lift is a massive vertical elevator that lifts ships over 113 meters in a single chamber. It uses a rack-and-pinion system with 256 synchronized cables to raise and lower a 3,000-ton water-filled basin, balancing the ship inside.

As a plumbing guy, I see this like a high-stakes sewage lift station: everything depends on seals and pressure balance. The basin holds 15,000 cubic meters of water—a sealed hydraulic system. If those gate seals leak, you’ve got a catastrophic flood scenario. The lift’s counterweights and electric motors are the mechanical equivalent of a precision sump pump array.

For your cruise, know this: the lift takes about 40 minutes total—faster than the old five-stage locks. But don’t rely on ship toilets during the ascent. Pressure changes can briefly affect vacuum systems. Flush only when the boat is stable. Bring a backup bottle of hand sanitizer.