New lock doors awaiting installation in the Canal expansion projects. The new doors will be sliding rather than hinged. The Panama Canal expansion project includes the construction of a third lane of locks alongside the existing locks. Three different levels will be constructed -- one behind the other -- rising ships from sea level to Lake Gatun at 85 feet above sea level. The locks are 60% wider and 40% longer than the existing ones, and each has three chambers. Double doors are being installed between the different levels to meet the stringent reliability requirements. The doors must be capable of withstanding hugely fluctuating water pressures, ship collisions and earthquakes.