Reconditioned NHD Plus Streams

These NHD Plus stream hydrography layers for the Northwest U.S. have been edited and reconditioned to work consistently with the SSN package for implementing the spatial statistical stream models. Edits were performed using the STARS toolkit and consisted of removing unconnected stream segments and reducing braided stream segments to single-threaded streams.

All reconditioned streams within the Northwest U.S. are available for download by the NHD Hydrologic Region code (example of Region 17) production units and end at the US border. These hydrography layers were developed as part of a Great Northern Landscape Conservation Cooperative funded project to develop the NorWeST regional stream temperature database and model. The study area includes the GNLCC, plus western Oregon and Washington. Click here for the GNLCC boundary shapefile. All shapefiles are in GNLCC projection.

Production unit 10c Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 10gh Reconditioned NHD Plus Stream layer (zipped shapefile)

Update coming soon!

Production unit 14b Reconditioned NHD Plus Stream layer (zipped shapefile)

excludes HUC 140402

Production unit 16b Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 17a Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 17b Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 17c Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 17d Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 17e Reconditioned NHD Plus Stream layer (zipped shapefile)

Production unit 18bc Reconditioned NHD Plus Stream layer (zipped shapefile)

Other GIS layers

Project Boundary

The study area covers the Great Northern Landscape Conservative Cooperate (GNLCC) boundary, including some additional surrounding watersheds, in the Northwestern US.

Simple Project Boundary Shapefile

Production Units within the Boundary Shapefile

4th Code HUCs within the Project Boundary Shapefile