Watershed boundaries, hydrography, stream gage locations, and impervious surface area shapefiles for Difficult Run watershed in Fairfax County, VA, USA

This resource includes shapefiles of spatial features from Difficult Run in Fairfax County, VA, USA. These data are frequently used in support of hydrologic observational and modeling studies. Layers include hydrography, watershed and subwatershed boundaries, fraction impervious surface area, and stream gage locations. The stream gage locations correspond to USGS stream gaging stations 01645704 (Fox Lake), 01645762 (Vienna), and 01646000 (Great Falls).