On August 15, 1914, the Panama Canal opened with the transit of the cargo ship SS Ancon, connecting the Atlantic and Pacific oceans through a 51-mile waterway across the Isthmus of Panama. The American-led construction under chief engineer George Washington Goethals required ten years, moved 240 million cubic yards of earth, and cost approximately $400 million. An estimated 5,600 workers died during the American phase, primarily from disease and accidents. The lock-based canal design reduced maritime transit between the oceans by thousands of miles.