The data set representing Commercially Navigable Waterways are derived from the Pipeline Integrity Management in High Consequence Areas rulemaking (IMP Rulemaking).
The commercially navigable waterway data is derived from the US Army Corps of Engineers’ National Waterway Network database (NWN), excluding all non-commercial routes designated as no-traffic, non-navigable, and/or for special vessels such as fishing, power, and recreational boats.
PHMSA conducts a review of available data sources every two years to apply any updates available to the data. Version 6 was created in February 2024.
Scale: Variable - see metadata. Installation: Esri shapefiles can be used with numerous GIS applications. Size: 10.5 MB Posted: February 2024
Download CNW V6 as Shapefile (ZIP) Download CNW V6 Metadata (PDF) Download List of CNWs by State (XLSX)
Scale: Variable - see metadata. Installation: Esri shapefiles can be used with numerous GIS applications. Size: 1.3 MB Posted: November 2019
Download CNW V5 as Shapefile (ZIP) Download CNW V5 Metadata (PDF) Download List of CNWs by State (XLSX)
Scale: Variable - see metadata. Installation: Esri shapefiles can be used with numerous GIS applications. Size: 1.2 MB Posted: Summer 2017
Download CNW V4 as Shapefile (ZIP) Download CNW V4 Metadata Download List of CNWs by State (XLSX)
Scale: Variable - see metadata. Installation: Esri shapefiles can be used with numerous GIS applications. Size: 1 MB Posted: Spring 2012
Download CNW V3 as Shapefile (ZIP) Open CNW V3 Metadata Download List of CNWs by State (XLSX)
