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USGS National Water Information System
These pages provide access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico. Online access to this data is organized around the categories listed to the left. The USGS investigates the occurrence, quantity, quality,...
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United States Army Corps of Engineers
The United States Army Corps of Engineers (USACE) is a federal agency and a major Army command made up of some 34,600 civilian and 650 military personnel, making it the world's largest public engineering, design and construction management agency....
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United States Geological Survey
The United States Geological Survey (USGS) is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization...
