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Uploaded on Jan 4, 2011
This movie shows the creation of dams throughout the continental US through time. It is a geographic information systems (GIS) based map where each dam is shown in its geographic location and appears on the map in the year of its construction. The progression of settlers west and the subsequent need for water for irrigation can be seen, as can the sudden increase in dam creation as part of The New Deal economic stimulus program for hydroelectric power and flood control needs.