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Maps

All maps of the Lower Illinois River Basin produced as part of this study were made using ARC/INFO©, a product of the Environmental Systems Research Institute, Inc. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
General
Study Area (30.1KB)  Percent Dug or Bored Private Wells (29.1KB)
Gaging Stations (24.1KB)
Hydrologic
Near Surface Aquifers (permeable material) (27.6KB) Wetland, Lakes, and Reservoirs (22KB)
Sub-basins by River (34.3KB) Mean Annual Precipitation (22.2KB)
Geologic
Physiography (18.2KB) Soil Permeability (25KB)
Uppermost Bedrock (28.6KB) Thickness of Herrin Coal (19.6KB)
Altitude of Bedrock Surface (27.8KB) Bedrock Valleys (22.7KB) 
Surficial Deposits (34.5KB) Quaternary Formations and Members (23.5KB)
Structural Features (70KB)
Physical Features
 Natural Divisons (19.6KB) Land Use (26.5KB)
Ecological
Tree Species (20.8KB) IEPA Fish Population Sampling (23KB)
Network and Design
Ground-Water Design (23.9KB) Surface-Water Site Network (26.8KB)
Basins by Surface-Water Sites (31.1KB) Bed Sediment and Fish Tissue Site Network (29.1KB)
Ecological Site Network (26.8KB)


Personnel to contact about a specific subject are listed on the staff page.
U.S. Department of the Interior
U.S. Geological Survey
221 North Broadway, Urbana, IL 61801, USA
URL: http://il.water.usgs.gov/proj/lirb/maps/index.html
Maintainer: djfazio@usgs.gov
Last modified: 16:13 CST Thurs 11 May 2000