The Panama Canal is one of the greatest engineering achievements in history, a roughly 50-mile waterway that lets ships pass between the Atlantic and Pacific oceans without sailing around South America. Its construction cost enormous sums, thousands of lives, and decades of effort, and it reshaped global trade forever.
The Dream of a Passage
The idea of a canal across the isthmus dates back to the Spanish colonial era, when a route was surveyed as early as the 16th century. For centuries the technology and resources did not exist. Interest surged in the 1800s, driven by the Panama Railroad and the growth of world commerce.
The French Attempt
In 1881, a French company led by Ferdinand de Lesseps, fresh from building the Suez Canal, began digging a sea-level canal across Panama. The tropical environment proved catastrophic. Malaria and yellow fever killed workers by the thousands, landslides plagued the excavation, and costs spiraled. The company collapsed in financial ruin by the end of the 1880s, and an estimated 20,000 or more workers died during the French effort.
The American Canal
After Panama’s independence in 1903, the United States acquired the rights and began work in 1904. The Americans made two decisive changes. First, they tackled disease: Dr. William Gorgas led sanitation campaigns against the mosquitoes that spread yellow fever and malaria, dramatically reducing deaths. Second, engineers abandoned the sea-level plan in favor of a lock system.
Chief engineer George Washington Goethals oversaw the massive project. Workers created Gatun Lake, then one of the largest artificial lakes in the world, by damming the Chagres River, and carved the Culebra (Gaillard) Cut through the continental divide. The locks raise and lower ships between sea level and the lake.
Opening in 1914
The Panama Canal officially opened on August 15, 1914, when the ship SS Ancon made the first official transit. The canal immediately shortened voyages between the oceans by thousands of miles and became a strategic and commercial artery for the world.
Transfer to Panama
For most of the 20th century the canal and its surrounding Zone were controlled by the United States. The Torrijos–Carter Treaties of 1977 established a timeline for transfer. On December 31, 1999, Panama assumed full control and has operated the canal successfully ever since through the Panama Canal Authority.
The Expansion
To handle ever-larger vessels, Panama built a third set of locks. The expanded canal opened in 2016, roughly doubling capacity and allowing “Neopanamax” ships to transit. The canal remains one of the busiest and most important waterways on Earth.
Learn more with our guide to Panama’s independence in 1903 and the U.S. presence and the Canal Zone.
