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Reach Address Database V3.5

1.0

The Reach Address Database (RAD) stores the reach address of each Water Program feature that has been linked to the underlying surface water features (streams, lakes, etc) in the National Hydrology Database (NHD). These reach addresses record the geographic extent of Water Program features in both tabular and spatial formats. The reach addresses link to a static copy of the NHD obtained from the USGS. Periodically, EPA retrieves an updated version of the NHD from USGS and migrates all reach addresses in the RAD to this new version.

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3.0

National Hydrography Dataset (NHD) - Reach Address Database (RAD)

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