Browse Critical Trends Assessment Program Regional Watershed Assessments by Title

  • (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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  • Krohe, James, Jr. (Illinois Dept. of Natural Resources, 2005)

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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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  • Siewers, Alfred (Illinois Dept. of Natural Resources, 2003)
    The Lower Des Plaines watershed extends from north central Cook County down through eastern DuPage County and western Cook County into northern Will County. Major waterways include the Lower Des Plaines River (from ...

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  • (Illinois Dept. of Natural Resources, 1998)
    The Lower Rock River Area Assessment continues the assessment ofthe Rock River basin that was begun with the Rock River Area Assessment in 1996. The area encompasses approximately 2,500 square miles in northwestern Illinois; ...

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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, 2003)

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  • Illinois Department of Natural Resources (Illinois Dept. of Natural Resources, 1997)
    The Mackinaw River begins near Sibley in Ford County and runs west to meet the Illinois River south of Pekin, Illinois. The boundaries of the Mackinaw River Area Assessment, as well as the Mackinaw River Ecosystem Partnership ...

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  • Post, Susan L. (Illinois Dept. of Natural Resources, 1997)
    The Mackinaw River originates in Ford County near Sibley and flows in a westerly direction before joining the Illinois River at River Mile 147.7, downstream of Pekin. The boundaries of the Mackinaw River Area Assessment ...

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  • (Illinois Dept. of Natural Resources, 2005-07)

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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, 2002)
    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 ...

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  • (Illinois Dept. of Natural Resources, 2001)
    The Prairie Parklands is a 1,477- square-mile triangle of flat to gently rolling land that covers portions of eight counties in northeastern Illinois: Cook, Will, Kendall, Grundy, LaSalle, Kankakee, Ford, and ...

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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 Department of Natural Resources (Illinois Dept. of Natural Resources, 1996-11)
    As-part of Phase II of the Critical Trends Assessment Project (CTAP), a regional assessment of the status of natural resources is planned for each model Resource Rich Area (RRA) and for RRAs where a local partnership forms ...

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  • Lyons, Stephen (Illinois Dept. of Natural Resources, 2005-10)

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  • Illinois Department of Natural Resources, Office of Scientific Research and Analysis; Illinois Department of Natural Resources, Illinois State Water Survey (Illinois Dept. of Natural Resources, 2002)
    The Shawnee Area is roughly defined as that portion of the Shawnee Hills located in Hardin and Pope counties and the eastern third of Johnson County, as well as small portions of Massac, Saline, and Gallatin counties. The ...

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  • (Illinois Dept. of Natural Resources, 1998)
    The Sinkhole Plain Area Assessment covers an area of about 1,228 miles2 (785,822 acres) in southwestern Illinois bordering the Mississippi River. It includes all of Monroe, much of St. Clair, and portions of Randolph and ...

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  • (Illinois Dept. of Natural Resources, 1998)
    The East Fork of the Spoon River rises to the north of Neposet in Bureau County and the West Fork rises to the east of Kewanee in Henry County. The forks join near the center of Stark County to form the main channel. The ...

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  • (Illinois Dept. of Natural Resources, 1998)
    The Sugar-Pecatonica Area Assessment encompasses approximately 796.3 square miles (509,675 acres) in north central Illinois along the Wisconsin/Illinois border. The area includes virtually all of Stephenson County, the ...

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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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