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Federal
Navigable Waterway Network Lines
Department of Homeland Security —
Homeland Infrastructure Foundation-Level Data (HIFLD) geospatial data sets containing information on Navigable Waterway Network Lines. -
Federal
Navigable Waterway Network Nodes
Federal Geographic Data Committee —
The Navigable Waterway Network Nodes dataset is periodically updated by the United States Army Corp of Engineers (USACE) and is part of the U.S. Department of... -
State
MD iMAP: Maryland Transit - Navigable Waterways
State of Maryland —
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The National Waterway Network is a comprehensive network database of the...