Information on this
Eight-Digit HUC Sub-Basin:

• Sub-Basin Name:
  Big Sioux Lower
• HUC # : 10170203
• Sub-Basin Data and Maps:
  -Downloadable GIS Data
       -Metadata for GIS Data
  -Interactive Map of Sub-Basin
• Sub-Basin Statistics:
  -Morphometric Statistics
       (Available for in-state River Basins)
  -1992 Land Use Statistics
  -2000 Land Use Statistics
  -2002 Land Use Statistics

-Environmental Statistics Group "Hydrologic Unit Project"
• Sub-Basin Monitoring Data:
  -IOWATER Water Monitoring
  -STORET Water Monitoring
       (Ambient Sites Only)

-IRIS Fish Summaries
• Sub-Basin Groups and Projects:
  -IOWATER Water-Monitoring Groups
  -Watershed Projects
  -EPA Citizen-based Watershed Groups ("Adopt Your Watershed" Program)

-National Watershed Network Partnerships
• Other Sub-Basin Information:
  -EPA "Surf Your Watershed"
  -USGS "Science in Your Watershed"

The map above shows the HUC 8 Sub-Basin outer boundary, the county boundaries, and the 10-digit HUC watershed delineations (black lines).  Click on a watershed for more information.