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目前美国有40,000公里水道,其中,航行深度低于1.8米的只有10,000公里,有25,500公里的水道保证水深在2.7米以上。全部水道的建设,管理和使用都靠联邦政府的预算来实现,目前的总投资已达100亿美元。现代水闸的尺度在20×122米到33×366米之间,最大落差达30米。运载货物靠带有1万马力的顶推船的船队来运输。船队由3千吨的平
At present, there are 40,000 kilometers of waterways in the United States, of which only 10,000 kilometers have a voyage depth of less than 1.8 meters and 25,500 kilometers of waterways guarantee a water depth of more than 2.7 meters. The construction, management and use of all watercourses are all covered by the federal government’s budget, with a total investment of 10 billion U.S. dollars. The scale of modern sluices in 20 × 122 meters to 33 × 366 meters, the maximum drop of up to 30 meters. Cargo is transported by a fleet of 10,000 horsepower pushers. The fleet consists of 3 thousand tons of flat