New updates since September, 2017, that affect the Watershed Boundary Dataset (WBD) Subbasins are being provided by NRCS’s National Geospatial Center of Excellence.
HUC Name
4 Added:
08010300 Town of Madrid-Saint Johns Bayou
13100000 Rio Conchos
13110000 Rio Salado
13120000 Rio San Juan
All remaining were Modifications of Subbasins only.