The Gatun Lake is 85 feet above sea level. How do the ships get raised and lowered? The canal has a water lock system that acts like a massive elevator. When ships enter the locks, they're raised ...

But the Singapore-flagged Dali’s crash into the Key Bridge on Tuesday has raised new questions about the risks big ships pose to American infrastructure. “There is a real challenge here ...

This article originally appeared on NorthJersey.com: The Bayonne Bridge was raised to let bigger ships pass. Now comes more dredging ...