|  In 1534, Charles I of Spain ordered the first survey of a proposed canal route 
				through the Isthmus of Panama. More than three centuries passed before the first 
				construction was started. The French labored 20 years, beginning in 1880, but 
				disease and financial problems defeated them. In 1903, Panama and the United States 
				signed a treaty by which the United States undertook to construct an inter-oceanic 
				ship canal across the Isthmus of Panama. The following year, the United States 
				purchased from the French Canal Company its rights and properties for $40 million 
				and began construction. The monumental project was completed in ten years at a cost 
				of about $387 million. The engineering problems involved digging through the 
				Continental Divide; constructing the largest earth dam ever built up to that time; 
				designing and building the most massive canal locks ever envisioned; constructing the 
				largest gates ever swung. |