Rapid Watershed Assessments


The Rapid Watershed Assessments (RWAs) consists of geographically displayed data layers, along with printable tabular watershed reports including summary data and source information. The RWAs draw on statewide data layers, clipped to the Hydrological Unit Codes (HUC) 8 watershed boundaries, in order to provide a watershed view of resource concerns that can be compared on a statewide scope. 

The RWA layers compile the best readily-available statewide data, including:

• A general description of the location, size, and political units associated with the HUC 8 watershed.
• Physical description including land use/land cover, public lands, cropland types, common resource areas, stream flow data, etc.
• Potential resource concerns.
• Census and social data.
• References and data sources.

The information is general in nature and is not sufficiently detailed to be used in lieu of an area-wide or watershed plan. However, the information will provide a solid starting point for local stakeholders to use should they decide to proceed with a more detailed area-wide or watershed planning effort.

RWA National NRCS Fact Sheet

Maps and Tabular Watershed Reports (PDFs)

While RWA is a mapped-based tool, detailed information about the data is also available in tabular watershed reports. See table below. In the watershed reports, county-based data is spatially distributed according to HUC 8 watershed boundaries. The RWA data is not real-time. References to the data sources, including year, can be found in the watershed reports.

Please note that the data provided for Offsite Risk Index Factors (sheet/rill erosion potential, surface drainage, leach index, wind erosion, flood frequency, and surface & subsurface drainage) involve calculations that were designed for analysis within an individual county.  As with other county-based data, application of this data at the 8-digit watershed level provides information on these factors only at the watershed level, and does not accurately reflect individual sites within the watersheds.

Indiana Map of 8-Digit Watersheds

Map Instructions - How To Turn On and Off Layers In PDF Document
1) Open map of watershed
2) Click on layers tab on left side of screen, or click on View menu, then click on Navigational Panels and select Layers.
3) Click on the eyeball next to each layer to turn them on and off.

 Auglaize Map
 Auglaize Data

 Lower Wabash Map
 Lower Wabash Data

 St. Marys Map
 St. Marys Data

 Blue-Sinking Map
 Blue-Sinking Data

 Lower White Map
 Lower White Data

 Sugar Map
 Sugar Data

 Chicago Map
 Chicago Data

 Middle Ohio-Laughery Map
 Middle Ohio-Laughery Data

 Tippecanoe Map
 Tippecanoe Data

 Driftwood Map
 Driftwood Data

 Mid. Wabash-Busseron Map
 Mid. Wabash-Busseron Data

 Upper East Fork White Map
 Upper East Fork White Data

Flatrock-Haw Map
Flatrock-Haw Data

 Mid. Wabash-Deer Map
 Mid. Wabash-Deer Data

 Upper Eel Map
 Upper Eel Data

 Highland-Pigeon Map
 Highland-Pigeon Data

 Mid. Wabash-Vermillion Map
 Mid. Wabash-Vermillion Data

 Upper Great Miami Map
 Upper Great Miami Data

 Iroquois Map
 Iroquois Data

 Mississinewa Map
 Mississinewa Data

 Upper Maumee Map
 Upper Maumee Data

 Kankakee Map
 Kankakee Data

 Muscatatuck Map
 Muscatatuck Data

 Upper Wabash Map
 Upper Wabash Data
 Upper Wabash RWA

 Little Calumet-Galien Map
 Little Calumet-Galien Data

 Patoka Map
 Patoka Data

 Upper White Map
 Upper White Data

 Lower East Fork White Map
 Lower East Fork White Data

 Salamonie Map
 Salamonie Data

 Vermillion Map
 Vermillion Data

 Lower Eel Map
 Lower Eel Data

 Silver-Little Kentucky Map
 Silver-Little Kentucky Data

 Whitewater Map
 Whitewater Data

 Lower Great Miami Map
 Lower Great Miami Data

 St. Joseph Map
 St. Joseph Data

 Wildcat Map
 Wildcat Data

 Lower Ohio-Little Pigeon Map
 Lower Ohio-Little Pigeon Data

 St. Joseph-Maumee Map
 St. Joeseph-Maumee Data

Links to Other Watershed Tools

Indiana Geological Survey: Indiana GIS Atlas

NRCS Geospatial Data Gateway

Indiana Water Quality Atlas

Indiana Water Monitoring Inventory

EPA Surf Your Watershed

Indiana Watershed Finder

Indiana Watershed Planning

Indiana Watershed Planning Guide

IDEM Watershed Specialists

Planning With POWER

Indiana’s Integrated Water Monitoring and Assessment Report (305(b)/303(d))

Watershed Inventory Workbook for Indiana

Indiana Watershed Leadership Program

EPA Nonpoint Source Pollution Homepage

Center for Watershed Protection

Brought to you by:
Indiana Rapid Watershed Assessments were developed by a partnership between the Natural Resources Conservation Service and the Indiana State Department of Agriculture, with input by an Advisory Committee.  The Advisory Committee included members and partners of the Indiana Conservation Partnership.  Special thanks to the Indiana Association of Soil and Water Conservation Districts and the Indiana Department of Environmental Management for their level of involvement.