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No one did. The US built the panama canal (construction was finished in 1914), and the US maintained control of it until dec 31, 1999 when the canal came into full Panamanian control.
We built it
The Panama Canal was in US control till 1999
in 1999
1999
On September 7, 1977,a treaty was signed by President Jimmy Carter and Omar Torrijos, de facto leader of Panama, granting Panamanians free control of the canal, so long as Panama guaranteed complete neutrality of the canal. The treaty led to full Panamanian control, effective at noon on December 31, 1999.
never
After ten years of construction, the Panama Canal was completed in 1914.
Panama owns the Panama Canal. Although the US had control over the Canal Zone from 1903 to 1979, the treaty was eventually amended in 1977.
On September 7, 1977,a treaty was signed by President Jimmy Carter and Omar Torrijos, de facto leader of Panama, granting Panamanians free control of the canal, so long as Panama guaranteed complete neutrality of the canal. The treaty led to full Panamanian control, effective at noon on December 31, 1999.
Initial construction was completed in 1914, and the canal opened, but construction continues to this day in enlarging, improving, and maintaining the canal.
the panama canal