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Sample image of hydrographic data on a map Data on America's surface waters are available from the USGS in the National Hydrography Dataset (NHD). The NHD includes data sets covering all streams and lakes at scales of 1:24,000 and 1:100,000. In some areas, the NHD is being supplemented with data larger than 1:24,000-scale. The NHD provides a true network that supports the analysis of any type of movement (navigation, sediment transport, effluent dispersion, for example) by surface waters. Further information and data download available at:

National Hydrography Dataset Model -- March 23, 2012 (Plot size 36"x48"; 1.8MB Get Adobe Reader)

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Page Last Modified: Tuesday, 17-Jun-2014 14:20:47 EDT