Sixty Corps of Engineers' locks and dams on the Ohio River and its major tributaries create some 2,800 miles of waterway navigable by shall0w-draft vessels. Major manufacturing and energy-related industries rely on this transportation network. The Corps of Engineers uses system modeling techniques to estimate the national economic benefits of the Ohio River system of Waterways. Sysem analysis as practiced in the Ohio River Region of the Corps' Lakes and Rivers Division depends upon system=wide databases. These include traffic projections, lock capacity estimates, and transportation rate and cost estimates, all of which are primary inputs into a static system model capable of solving for equilibrium levels of traffic.
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