The data set representing Commercially Navigable Waterways are derived from the Pipeline Integrity Management in High Consequence Areas rulemaking (IMP Rulemaking).
PHMSA conducted a review of available data sources in December 2021 and confirmed that no changes are available. Version 5 is still the most up to date CNW dataset available from the NPMS. The next review is planned for December 2023.
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.
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)
