The Great Events by Famous Historians

It was, however, by some sacrifice of moral sense that the United States gained control of the Isthmus. They offered a financial deal to the republic of Colombia: the terms were liberal, and the Colombian Government had in principle no objection to make money by the grant of a perpetual lease of so much land as was needed for the Canal. But it haggled unreasonably over the details, with the object of delaying business until the period of the French concession had expired, so that it might secure, not only its own share of the compensation, but the share that was to be paid to the French investors whose rights and achievements were taken over by the United States. A revolution occurred: the province of Panama declared its independence of Colombia, and at once completed the bargain. The revolution was so exceedingly opportune in the interests of the United States, and of the French concessionaires, that it is impossible not to suspect its instigation in these interests. Beyond a doubt the United States assisted the revolutionaries: they prevented the Colombian forces from attacking them. Panama was originally independent of Colombia, and had been badly treated by the Colombian Government, which, in its distant capital of Bogota, was out of touch with Panamanian interests, and returned to the province but a very small share of its taxes. But, however this may be, we may take it, without straining facts, that the United States, being unable to bring Colombia to terms, evicted her in favor of a more pliable authority. This is not in accord with Christian morality. Nor are political dealings generally. And, from a practical point of view, it was preposterous that the cupidity of some Colombian politicians should stand in the way of an improvement in geography. The agreement with the newly born republic of Panama gave the United States a perpetual lease of a strip of land, ten miles broad, across the Isthmus. This is styled the "Canal Zone." The Latin towns of Panama and Colon fall within its limits. But they are expressly excluded from the United States jurisdiction.

In substance the Canal works consist, first, of an enormous dam (at Gatun), which holds up the water of the river Chagres so as to flood a valley twenty-four miles long; secondly, of a channel—nine miles in length—(the Culebra Cut)—which carries the valley on through a range of low hills; and, thirdly, of a set of locks at each end of this stretch of water that are connected by comparatively short approaches with the sea. The surface of the lake will be from 79 to 85 feet above sea-level, and vessels will be raised to this height and lowered again by passing through a flight of three locks upward and another flight of three locks downward. The passage of both flights of locks is not expected to occupy more than three hours, and ships should complete the transit of the Isthmus—a distance of about fifty miles—within twelve hours at most. The design of the work offers nothing that is new in principle to engineering science. Dams, cuttings, and locks are familiar contrivances. But they are on an immensely larger scale than anything which has previously been attempted. The area of the lake of impounded water will be 164 square miles, and it has been doubted whether the damming of so large a mass of water, to a height of 85 feet, could safely be undertaken. But this portion of Central America is apparently not liable to earthquakes. And the dam is so large as to be a feature of the earth's surface. It is nearly half a mile broad across its base, so that although its crest is 105 feet above sea-level its slope is not very perceptible. Its core is formed of a mixture of sand and clay, poured in from above by hydraulic processes. This has set hard, and is believed to be quite impervious to water at a much higher pressure than that to which it will be subjected. In the center of the river valley—a mile and a half broad—across which the dam has been flung, there very fortunately arose a low rocky hill. This is included in the dam, and across its summit has been constructed the escape or spill-way. During seasons of heavy rain the surplus discharge of river water will be very heavy, and a cataract will pour over the spill-way. But it will rush across a bed of rock, and will be unable to erode its channel. And it will be employed to generate electrical power which will open and shut the lock-gates and generally operate the Canal machinery. The river Chagres will energize the Canal as well as fill it.