Data should be used only in accordance with the limitations and restrictions posted on the host sites. This page is not intended to be an official source of flood warnings or flood predictions. Period of record varies by watershed. Dartmouth Flood Observatory Comprehensive catalog of large river floods from 1995 to the present. Where available, archive includes information about deaths, displaced persons, and damage, as well as satellite-based flood analysis maps.
Site also links to a variety of tools for flood detection, mapping, and analysis.
Includes dimensions, hydraulics, and hydrogeology for each dam. Data sets may be located by searching or by browsing. Some data sets are available online at no cost. Others require a distribution fee, or must be ordered on compact disc or tape. For more information, see About the USGS Geospatial Data Clearinghouse .