Station list     Available data
ILLINOIS RIVER BASIN


05559600                               ILLINOIS RIVER AT CHILLICOTHE, IL



LOCATION.--Lat 40°55'45", long 89°27'42", in NW1/4 sec.22, T.11 N., R.9 W., Peoria County, Hydrologic Unit 07130001, at center of Atchison, Topeka and Sante Fe Railroad bridge, 1 mi north of Chillicothe and at mile 181.9.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--
SUSPENDED-SEDIMENT DISCHARGE: May 1993 to current year.

REMARKS.--Water discharge used to compute this record are from Illinois River at Henry (station 05558300). Suspended-sediment samples were collected by a local observer twice weekly with additional samples colleced during high runoff periods. Samples were not collected (and data are not published) during periods of ice.

EXTREMES FOR PERIOD OF RECORD.--
SEDIMENT CONCENTRATIONS: Maximum daily, 491 mg/L, July 20, 1996; minimum daily, 16 mg/L, Mar. 7, 1998.
SEDIMENT LOADS: Maximum daily, 93,800 tons, July 20, 1996; minimum daily, 177 tons, Oct. 5, 1997.

EXTREMES FOR CURRENT YEAR.--
SEDIMENT CONCENTRATIONS: Maximum daily, 338 mg/L, April 18, minimum daily, 20 mg/L, Sept. 18.
SEDIMENT LOADS: Maximum daily, 33,200 tons, April 18, minimum daily, 191 tons, Sept. 18.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
MEANMEANMEAN
MEANCONCEN-SEDIMENTMEANCONCEN-SEDIMENTMEANCONCEN-SEDIMENT
DISCHARGETRATIONDISCHARGEDISCHARGETRATIONDISCHARGEDISCHARGETRATIONDISCHARGE
DAY(CFS)(MG/L)(TONS/DAY)(CFS)(MG/L)(TONS/DAY)(CFS)(MG/L)(TONS/DAY)
 
OCTOBERNOVEMBERDECEMBER



15690385407720661380406045492
24680384806880701290514046640
35780385945650671020486050661
4550038565317062533558056848
5543038560380058599546063927
 
65280426054180586496460681180
77220499563790575849870671800
863504781241205763011500621930
963704373838305658010300561550
10614041682e800010021509440501270
 
11532040577135001395100787044945
1258303961611300812500753040815
1350403851810800631840706040758
1449303850310200531460567041622
153970454748790461090501042567
 
163400565088670501170466042533
174170606817430561120477043554
1814000632410644051886393045482
19185001587960710044848562047703
20169001366210690039731328049430
 
21150001074350469041516458049609
22115001003110363045445e430048556
239910912440542049722296045365
249200731800461052639300042349
258300561250478052680287038299
 
26711042813396041424296036288
27652033580416030342483035386
28769041866416032362321035307
29711050966341037319424036282
307960581250583043681e320036315
 
317150631210---------e380042433
 
TOTAL237950---45624186920---31290168020---21896

 
JANUARYFEBRUARYMARCH



1e3500------39400------14800642560
2e3600------38000------16000632710
3e3000------35900------16300683000
4e3500------38800------14900763060
5e3000------32400------16000723090
 
6e3100------32600------17200663090
7e3400------29600------16000632740
8e3100------25800------16000703020
9e3000------26600------17000823770
10e3100------24600------16500843770
 
11e3200------22800------15800682900
12e3100------28300------15400542230
13e3000------26000------15500702910
14e3100------e24000------158001054510
15e3200------22600------14300933610
 
16e3300------21900------12200692280
17e3500------20300------15200672780
18e3700------17900------22800895510
19e4100------17100------244001067000
20e4700------16700------22400835050
 
21e7000------15900------21800784580
2211500------14300------19200643320
2318800------14500------17400512400
2434500------12100------17500462170
2549300------12200------16200451980
 
2648700------12400------14600501960
2748300------13100------13700521930
2847300------14500------13600531950
2948200---------------13700542010
3046300---------------10400551550
 
3141700---------------10100521420
 
TOTAL468800------650300------502700---94860

 
APRILMAYJUNE



1103005013904610036444014300662560
268004994543300293350190001015240
3e75005010203910033348022200865140
468205410203300033290021000764330
581706213503080031258019600703700
 
691007117602730035254018900643280
784608018302660039277017700643080
8110008224402650036254016800813690
9135008330202380030195015500893720
10154007832602170028164014400722820
 
111670074331020500271470154001034280
121600077333021400261530185001587930
1315000843400251004732202340017411100
1414700913620291006047303150017114500
15159001024400288005341003800015515900
 
161990020611600265005237403970011812700
1732000299259002460043289033800958700
1836400338332002760036267028700725590
1939000163169002640036255025600543760
20e3700074737023800382440e23500412620
 
21341005753402230054324021200422420
22326006153802430075494019100462400
233680061608023600101649019300462400
244670047586023500126798020900512860
255020041554021600101591020000583150
 
26471004152602030074406017400643010
27438004350901750072339016300632770
28443004351701610092400015800622640
29470004051001590084360015400722990
304690043549014800732930133001023670
 
31---------13900642410---------
 
TOTAL769150---185375785800---106480636200---152950

 
JULYAUGUSTSEPTEMBER



11430011243006660478395580671010
2135001184290553046687526048692
3142001194560541045661529035508
4138001174340557044665510031430
5133001144080480044573493030404
 
614100933540515045621458030369
712400732440508045621516030423
810700691980590050784506035480
98930691660497056757411043486
108810671600469063805357044423
 
118210611350488060786364042410
128260551220471054694342042394
137080499416950811480376045454
1460004573958401161840416051577
155770456935630841290437060704
 
16550050745491060795294047370
17598056907581060935388030322
18628050853533063909345020191
19688044805648052901337025227
20675041738613039640306037294
 
21680039723613037619366052526
22748040815664039708432039458
23767042863512041574307039328
249190411000787043911445043510
25799040876802034738282066481
 
26801047101087103480336001121140
2773805410607590397934060911030
286960529787450418338000601290
2952204867478104492311200962920
305660456935410568228810892040
 
316740468395520771140---------
 
TOTAL269850---51312186700---26147138680---19891
e Estimated

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