On October 10, 1913, President Woodrow Wilson pressed a button in Washington that sent a telegraphic signal to Panama. The signal triggered the blast that breached the Gamboa Dike, completing the flooding of Culebra Cut and connecting it with Gatun Lake.

The moment was spectacular. Its meaning needs a precise label: this was a major construction milestone in the Panama Canal project, rather than the canal’s official opening.

The Panama Canal Authority explains that landslides in Culebra Cut still prevented full navigation after the explosion. Dredging continued for nearly two months to open that stretch. Water could connect the excavated sections before vessels could safely use the entire route.

That distinction is easy to lose when a historical event is remembered through one dramatic image. The explosion made visible progress that had depended on years of less visible work. It did not eliminate the remaining obstacles.

The timeline continued into 1914. According to the Canal Authority, the first complete passage by a self-propelled, oceangoing vessel took place on January 7, when the crane boat Alexandre La Valley traveled through the canal. The official opening followed on August 15, with Ancon making the inaugural official transit.

These dates describe different achievements. Joining the waterway, completing a vessel passage and formally opening the canal were separate steps. Collapsing them into one “completion date” makes the story simpler but the history less accurate.

For readers interested in markets and business, DTM’s takeaway is about how to evaluate infrastructure. A visible construction achievement can reduce one source of uncertainty while leaving operational questions unanswered. The next useful question is what the project can actually do.

October 10 belongs in the history of a waterway connecting the Atlantic and Pacific. Its significance becomes clearer when the celebration and the unfinished work remain in the same picture.