Washington State Hydrography Dataset Program
The Washington State Hydrography Dataset Program (WASHD) coordinates the mapping of the surface waters of the State. Historically this has been as the steward of the USGS National Hydrography Dataset (NHD). As USGS transitions to the newer 3D Hydrography Program (3DHP), WASHD Program's role is evolving.
Washington state uses this dataset as the standard for all of our water-based GIS data. As the lead agency, we work with our partners to produce high quality hydrography data.
For more details, visit the WASHD Program Page.
WASHD & National Hydrography
The U.S. Geological Survey's (USGS) National Hydrography Dataset (NHD) is the federal standard GIS dataset for hydrography, representing surface waters of the United States such as rivers, streams, canals, lakes, ponds, and coastlines. It has been the state standard for 12 years, and now Washington State is adapting to USGS’ decision to move towards a national 3D elevation-derived hydrography program (3DHP) that will replace NHD.
WASHD Program Projects
As part of our goal to improve stream mapping, we completed the Stillaguamish Pilot Project. This prepared us for our current focus, the Statewide Modernized Surface Water Mapping Update Project. Additionally, we completed the Coastline Hi-Res Lidar Delineation Project.
GIS Data
The WASHD Program is working to determine the best methods of updating the state’s crucial hydrography, since it is not only used as the statewide standard but also as the base for any water-associated GIS data, such as fish distribution, culvert locations, and environmental monitoring stations.
Other Resources
Discover ways to stay connected, as well as additional forms of WASHD communication and hydrography information.
Contact information
Joshua Greenberg, PhD. GISP (He/Him)
Washington State Hydrography Steward
joshua.greenberg@ecy.wa.gov
360-742-6992