Illinois Department of Natural Resources. Office of Scientific Research and Analysis; Illinois Department of Natural Resources. State Geological Survey Division
Mississippi Western Five area assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis
Illinois Department of Natural Resources. State Geological Survey Division
Natural resources conservation areas --Illinois --Mississippi Western Five Assessment Area
Natural resources surveys --Illinois --Mississippi Western Five Assessment Area
Mississippi Western Five Assessment Area (Ill.)
Galesburg Till Plain (Ill.)
The Mississippi Western Five Assessment Area is roughly defined by those watersheds in Illinois that drain into the reach of the Mississippi River between Muscatine, Iowa, and Dallas City, IL. The area covers approximately 1,630 square miles, falling within portions of five Illinois counties-Henderson, Henry, Knox, Mercer, and Warren-as well as very small parts of Hancock and Rock Island counties. It falls within the physiographic region called the Galesburg Till Plain. The present topography is characterized by rolling upland prairies, interspersed by well-established streams that have steep-walled valleys that are eroded as much as 50 to 150 feet below the general level of the adjacent uplands.
This assessment is comprised of four volumes. In Volume I, Geology discusses the geology, soils, and minerals in the assessment area. Volume 2, Water Resources, discusses the surface and groundwater resources and Volume 3, Living Resources, describes the natural vegetation communities and the fauna of the region. Volume 4 contains two parts: Part I, Socio-Economic Profile, discusses the demographics, infrastructure, and economy of the area; and Part II, Environmental Quality, discusses air and water quality, and hazardous and toxic waste generation and management in the area.
Illinois Dept. of Natural Resources
Series/Report Name or Number
Critical Trends Assessment Program
Type of Resource
Copyright and License Information
These documents are a product of the Illinois state scientific surveys
and the Illinois Department of Natural Resources, and has been selected
and made available by the Institute of Natural Resource Sustainability,
University of Illinois at Urbana-Champaign. They are intended solely for
noncommercial research and educational use, and proper attribution is
Detailed assessments of 32 major watersheds in Illinois, conducted through the Critical Trends Assessment Program administered by the Illinois Department of Natural Resources. Includes contributions from each of the State Scientific Surveys which are now part of the Prairie Research Institute.