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State
National Hydrography Dataset (NHD) Archive
State of California —
This page is meant to act as an archival repository for previous versions of the statewide National Hydrography Dataset (NHD) which includes the Watershed Boundary... -
State
National Hydrography Data - NHD and 3DHP
State of California —
The USGS National Hydrography Dataset (NHD) Downloadable Data Collection from The National Map (TNM) is a comprehensive set of digital spatial data that encodes...