All stream segment survey data of the Lower Illinois River Basin
produced as part of this study were made using Surfer® for Windows,
and Grapher® for Windows. Both are products of Golden Software, Inc.
Data points for the plots were collected using a Nikon© Total
Station. Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S. Government.
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
Last modified: 13:24 CST Wed 10 May 2000