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Implementation Watersheds
Polygon layer representing all watershed Boundaries for the Implementation Watersheds, including Approved, In Progress and Completed Implementation Areas. -
Virginia Major River Basins
Polygon feature class outlining the major river basin watershed areas within Virginia. -
TMDL Watersheds
This dataset depicts TMDL watershed boundaries. A TMDL watershed is the area covered by a TMDL equation. It consists of one or more impaired streams that have an assigned Cause... -
6th Order NWBD HUC 12 Watersheds
This data is the latest (Version 6) national hydrologic unit (HU) boundaries at levels 1-6 for Virginia developed and maintained by the Virginia Department of Conservation and... -
Tennessee GIS: Water Data
From the site: "This statewide watershed coverage (12 digit HUC) was provided by the Natural Resources Conservation Service (NRCS). The coverage is in ArcView shapefile format...