WaDE [WaDE_Schema_0.25.xml]
| Name | HUC |
| Comment | Code representing the USGS Hydrologic Unit (or HUC) at the most detailed level that the assignment can be made (6-digit being the lowest level of resolution allowed). Leading 0's should be included. |
| Data Type | VarChar(20) |
| Primary Key | |
| Nulls | |
| Auto Num. | |
| Default | |
| FK |