Browse Critical Trends Assessment Program Regional Watershed Assessments by Author "Illinois Department of Natural Resources, State Geological Survey Division"

  • Illinois Department of Natural Resources, Office of Scientific Research and Analysis; Illinois Department of Natural Resources, State Geological Survey Division (Illinois Dept. of Natural Resources, 1999)
    The Thorn Creek Assessment Area is an approximately 104.26-mile2 (66,725 acre) area that includes portions of southern Cook County and northeastern Will County. This assessment area consists of the entire Thorn Creek basin ...

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  • Illinois Department of Natural Resources, Office of Scientific Research and Analysis; Illinois Department of Natural Resources, State Geological Survey Division (Illinois Dept. of Natural Resources, 1998)
    The Upper Des Plaines Area Assessment covers an area of approximately 346 mile2 (221,637 acres) spanning central Lake County, north-central Cook County, and the northeastern portion of Du Page County. The Des Plaines River ...

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