Browse Critical Trends Assessment Program Regional Watershed Assessments by Issue Date

  • Illinois Department of Natural Resources (Illinois Dept. of Natural Resources, 1998)
    The Illinois River Bluffs Area Assessment examines an area in west-central Illinois that includes parts of the upper and lower Illinois River watersheds from the vicinity of Hennepin southward to East Peoria. Because ...

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  • Illinois Department of Natural Resources (Illinois Dept. of Natural Resources, 1999)
    The area discussed in this assessment coincides with the boundaries of the Illinois portion of the Vermilion River basin as determined by the Illinois Environmental Protection Agency. This area, covering approximately 1,485 ...

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  • Illinois Department of Natural Resources. Office of Scientific Research and Analysis (Illinois Dept. of Natural Resources, 1999)
    The Prairie Parklands area encompasses approximately 1,477 square miles (945,500 acres) in northeastern Illinois; including large parts of Will, Grundy, and Kendall counties, and smaller portions of Cook, Kankakee, Ford, ...

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  • (Illinois Dept. of Natural Resources, 1999)
    The Du Page River area encompasses approximately 372 square miles (238,462 acres) in northeastern Illinois, mostly in Du Page and Will Counties, with small portions in Cook, Kane, Kendall, and Grundy Counties. The area is ...

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  • (Illinois Dept. of Natural Resources, 1999)
    The Kaskaskia River begins as a cropland ditch in Champaign County and runs south for approximately 270 miles before it empties into the Mississippi River in Randolph County in southwestern Illinois. The area discussed in ...

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  • Krohe, James, Jr. (Illinois Dept. of Natural Resources, 1999)
    Beginning in 1838, officials in the then-territory of Wisconsin asserted that the watershed of the Pecatonica River and the Sugar River, its main tributary, and the rest of Illinois’ northernmost 14 counties belonged ...

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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, 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 Dept. of Natural Resources, 1999)
    The Sangamon River basin drains 5,419 square miles and forms the largest watershed of any of the tributaries of the Illinois River. The main stem of the Sangamon River flows more than 240 miles. This assessment report ...

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  • (Illinois Dept. of Natural Resources, 2000)
    The Sangamon River basin drains 5,419 square miles and forms the largest watershed of any of the tributaries of the Illinois River. The mainstem of the Sangamon flows more than 240 miles. The assessment area encompasses ...

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  • Sparks, Ruth (Illinois Dept. of Natural Resources, 2000)

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  • (Illinois Dept. of Natural Resources, 2000)
    The Calumet area encompasses approximately 184.3 square miles (117,961 acres) in southern Cook County and in a very small fraction of Will County. Waterways in the area include the Calumet-Sag Channel, Little Calumet River, ...

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  • Illinois Deptartment of Natural Resources (Illinois Dept. of Natural Resources, 2000)
    The Vermilion River Assessment Area is located in north central Illinois and includes parts of seven counties - Ford, Iroquois, LaSalle, Livingston, Marshall, McLean, and Woodford. It encompasses 1,331 square miles and ...

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  • Post, Susan L. (Illinois Dept. of Natural Resources, 2000)

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  • Illinois Department of Natural Resources. Office of Scientific Research and Analysis (Illinois Dept. of Natural Resources, 2000)
    ~The Chicago RiverlLake Shore assessment area covers approximately 348 square miles in northeastern Illinois and falls within portions of two counties - Cook and Lake. The area is defined by the watershed of the Chicago ...

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  • (Illinois Dept. of Natural Resources, 2000)
    The Lower Des Plaines River Assessment Area encompasses approximately 357.5 miles' (228,807 acres) in northeast Illinois. It extends' from north central Cook County down through eastern Du Page County and western Cook ...

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  • Illinois Department of Natural Resources. Office of Scientific Research and Analysis (Illinois Dept. of Natural Resources, 2000)
    The Kinkaid assessment area is located in southern lllinois and covers approximately 629 square miles, most of which falls within three counties -Jackson, Perry, and Washington. A small portion also extends slightly into ...

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  • (Illinois Dept. of Natural Resources, 2000)
    The Sangamon River meanders across central Illinois for more than 240 miles. Its waters accumulate in southeast McLean County and northwest Champaign County and eventually empty into the Illinois River near Beardstown. ...

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  • (Illinois Dept. of Natural Resources, 2001)
    The La Moine River Assessment Area is defined by the watershed of the La Moine River, along with an additional area bordering on the west side of the Illinois River that lies between the Spoon River watershed and the La ...

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  • (Illinois Dept. of Natural Resources, 2001)
    The Illinois River Bluffs Assessment Area falls within portions of 11 counties -Bureau, Fulton, Knox, LaSalle, Lee, Marshall, Peoria, Putnam, Stark, Tazewell, and Woodford. It encompasses 2,637 square miles and takes in ...

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  • Illinois Department of Natural Resources, Office of Scientific Research; Illinois Department of Natural Resources, Illinois State Water Survey (Illinois Dept. of Natural Resources, 2001)
    The Upper Rock River Assessment Area is defined by that portion of the Rock River watershed downstream from the Illinois-Wisconsin state line to the Rock River's confluence with Pine Creek near Grand Detour. The area falls ...

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