Illinois State Water Survey Illinois River Watershed r e iv R x o F 88° 90° WISCONSIN 89° Lake BOONE Michigan JO DAVIESS LAKE WINNEBAGO STEPHENSON D MCHENRY E r S e v i CARROLL r OGLE R P e v s i COOK e L R n F O X i 42° 42° k a A c l o P R s I e N DUPAGE D KANE E r S e l a C H I C A G O / WHITESIDE DEKALB v n LEE i a R C A L U M E T x hip C o S F & Cal-S ag Channe y l ek r 91° e a r t C i au KENDALL n e a ur S WILL B ig BUREAU B GRUNDY ROCK ISLAND ver I L L I N O I S is Ri llino HENRY I M LASALLE a K A N K A K E E z o n MERCER KANKAKEE PUTNAM R kakee Rive r iv an e K V r e STARK r m i l i 41° 41° MARSHALL o KNOX n R iv I R O Q U O I S r e ive r LIVINGSTON s R oi Iroqu HENDERSON S P O O N WARREN er PEORIA V E R M I L I O N iv R WOODFORD n r o e o iv IROQUOIS p R M A C K I N A W S is w Rive o ina r n ck li a Il M L A M O I N E MCLEAN FORD FULTON TAZEWELL INDIANA L MCDONOUGH a M o in e R V HANCOCK iv k e e e rm r e r i MASON DEWITT C lio LOGAN alt n S R PIATT CHAMPAIGN iv SCHUYLER e Lakes > 50 acres r r ADAMS e v i VERMILION FOX Major Watersheds 40° BROWN MENARD R 40° on S A N G A M O N m Sub-watersheds M ga M cK CASS an Fox e MACON S Major Tributaries e k i e re s C Rivers and Streams s EDGAR i SANGAMON s MORGAN s S DOUGLAS o i ut MOULTRIE p SCOTT h CHRISTIAN F p o rk r i PIKE I L L I N O I S e v i R The Illinois River watershed (shaded in light blue) is of vital R COLES i k s importance to the State of Illinois. This large watershed covers v e a e r e r r 44 percent of the state and 90 percent of Illinois’ population resides C r le a pp b within 55 counties wholly or partially included in the watershed. A m The Illinois River, one of the major tributaries of the Mississippi CALHOUN MACOUPIN SHELBY E GREENE River, is part of the only inland waterway linking the Great Lakes 91° M A C O U P I N to the Gulf of Mexico. The Illinois River watershed has a drainage r CLARK k e M v CUMBERLAND ac e i area of 28,906 square miles or sq mi (75,156 square kilometers or o re u R pin C sq km), of which approximately 3,058 sq mi (4,920 sq km) are i a k located in Indiana and 1,070 sq mi (1,722 sq km) in Wisconsin. s a MONTGOMERY k The watershed contains the drainage basins of several of the Illinois’ s a JERSEY K EFFINGHAM major rivers including the Des Plaines, Kankakee, Fox, Vermilion, CRAWFORD Mackinaw, Spoon, Sangamon, and La Moine Rivers. 39° 39° FAYETTE JASPER The Illinois River watershed recently has become a focus of state and federal agencies and other organizations interested in integrated L BOND i t watershed management. As a result, issues being discussed at the t MADISON le watershed scale are related to habitat restoration, floodplain manage- W a ment, erosion and sedimentation, and water quality. In support of this CLAY b effort, the Illinois Scientific Surveys have initiated development of ash LAWRENCE R RICHLAND iv the Illinois Rivers Decision Support System (http://ilrdss.sws.uiuc.edu) e MARION r to organize data and information related to the Illinois River watershed, to document project activities within the watershed, and to assess and CLINTON evaluate the effectiveness of restoration projects and management r practices. This map is one of the products of this effort. ST. CLAIR e v The technical content of the map is the responsibility of the authors. WAYNE EDWARDS WABASH i The user assumes all liability for the interpretation and use of the map. R WASHINGTON h JEFFERSON Lambert Conformal Conic projection based on standard parallels MONROE s 30° and 45°. a b a Major Tributaries of the Illinois River Watershed WHITE RANDOLPH PERRY HAMILTON W Drainage area River (sq mi) 38° 38° r e FRANKLIN Des Plaines River 2,111 iv R Kankakee River y 5,165 JACKSON d Fox River ud 2,658 M SALINE 90° Big Vermilion River 1,331 Mackinaw River 1,136 GALLATIN WILLIAMSON Spoon River 1,855 88° Sangamon River 5,418 La Moine River 1,350 Derek Winstanley, Chief HARDIN Illinois State Water Survey MODIFIED GEOGRAPHIC INFORMATION SYSTEM THEMES http://www.sws.uiuc.edu JOHNSON POPE 217- 244- 5459 Watershed Boundaries UNION U.S. Geological Survey Hydrologic Unit Map, 1974. Scale 1:500,000. Illinois Department of Natural Resources http://dnr.state.il.us River Major Rivers and Tributaries ache ALEXANDER C U.S. Geological Survey Digital Line Graph file, Hydrography layer, 1980-1986. University of Illinois at Urbana- Champaign http://www.uiuc.edu PULASKI MASSAC Scale 1:250,000. Lakes R i v o e Illinois Environmental Protection Agency lakes theme, 1996. Lake Michigan Map compiled by Misganaw Demissie and Kathleen J. Brown i r extracted from Environmental Systems Research Institute data and maps, 2000. Digital copy available at http://ilrdss.sws.uiuc.edu h O Scale: 1:100,000. 37° 37° Scale 1:850,000 (1 inch = 13.4 miles) 89° 0 5 10 20 30 40 50 Miles MAP SERIES 2003-01 Printed by the authority of the State of Illinois (02-03-24491-4M).