Panama Canal: How Engineers Lifted Ships Over a Mountain Range

Panama Canal construction succeeded by combining a dam-and-lake design with gravity-fed locks, relentless excavation, and practical disease control.

France began a sea-level attempt in 1880, but rain, landslides, yellow fever, and malaria stopped the effort before completion. During the American phase, William Gorgas led fumigation and mosquito control, while engineers chose locks instead of one deep trench. 1

A dam at Gatun held back the Chagres River and created Gatun Lake about 85 feet above sea level. The original lock chambers measured 110 feet wide by 1,000 feet long. Water moved through culverts in the lock walls by gravity, raising ships to the lake and lowering them again on the far side. 23

The hardest excavation was Culebra Cut, an 8.75-mile route through the Continental Divide. Workers drilled and blasted rock, loaded spoil onto rail cars, and used track-shifters that could move a section of track up to nine feet. Landslides repeatedly pushed material back into the channel. 4

At Gatun, the locks required more than two million cubic yards of concrete. Water joined Gatun Lake to Culebra Cut in October 1913, and the S.S. Ancon made the first official transit on August 15, 1914. 2