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
MEAN MEAN MEAN
MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT
DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE
DAY (CFS) (MG/L) (TONS/DAY) (CFS) (MG/L) (TONS/DAY) (CFS) (MG/L) (TONS/DAY)
 
OCTOBER NOVEMBER DECEMBER



1 5690 38 540 7720 66 1380 4060 45 492
2 4680 38 480 6880 70 1290 5140 46 640
3 5780 38 594 5650 67 1020 4860 50 661
4 5500 38 565 3170 62 533 5580 56 848
5 5430 38 560 3800 58 599 5460 63 927
 
6 5280 42 605 4180 58 649 6460 68 1180
7 7220 49 956 3790 57 584 9870 67 1800
8 6350 47 812 4120 57 630 11500 62 1930
9 6370 43 738 3830 56 580 10300 56 1550
10 6140 41 682 e8000 100 2150 9440 50 1270
 
11 5320 40 577 13500 139 5100 7870 44 945
12 5830 39 616 11300 81 2500 7530 40 815
13 5040 38 518 10800 63 1840 7060 40 758
14 4930 38 503 10200 53 1460 5670 41 622
15 3970 45 474 8790 46 1090 5010 42 567
 
16 3400 56 508 8670 50 1170 4660 42 533
17 4170 60 681 7430 56 1120 4770 43 554
18 14000 63 2410 6440 51 886 3930 45 482
19 18500 158 7960 7100 44 848 5620 47 703
20 16900 136 6210 6900 39 731 3280 49 430
 
21 15000 107 4350 4690 41 516 4580 49 609
22 11500 100 3110 3630 45 445 e4300 48 556
23 9910 91 2440 5420 49 722 2960 45 365
24 9200 73 1800 4610 52 639 3000 42 349
25 8300 56 1250 4780 52 680 2870 38 299
 
26 7110 42 813 3960 41 424 2960 36 288
27 6520 33 580 4160 30 342 4830 35 386
28 7690 41 866 4160 32 362 3210 35 307
29 7110 50 966 3410 37 319 4240 36 282
30 7960 58 1250 5830 43 681 e3200 36 315
 
31 7150 63 1210 --- --- --- e3800 42 433
 
TOTAL 237950 --- 45624 186920 --- 31290 168020 --- 21896

 
JANUARY FEBRUARY MARCH



1 e3500 --- --- 39400 --- --- 14800 64 2560
2 e3600 --- --- 38000 --- --- 16000 63 2710
3 e3000 --- --- 35900 --- --- 16300 68 3000
4 e3500 --- --- 38800 --- --- 14900 76 3060
5 e3000 --- --- 32400 --- --- 16000 72 3090
 
6 e3100 --- --- 32600 --- --- 17200 66 3090
7 e3400 --- --- 29600 --- --- 16000 63 2740
8 e3100 --- --- 25800 --- --- 16000 70 3020
9 e3000 --- --- 26600 --- --- 17000 82 3770
10 e3100 --- --- 24600 --- --- 16500 84 3770
 
11 e3200 --- --- 22800 --- --- 15800 68 2900
12 e3100 --- --- 28300 --- --- 15400 54 2230
13 e3000 --- --- 26000 --- --- 15500 70 2910
14 e3100 --- --- e24000 --- --- 15800 105 4510
15 e3200 --- --- 22600 --- --- 14300 93 3610
 
16 e3300 --- --- 21900 --- --- 12200 69 2280
17 e3500 --- --- 20300 --- --- 15200 67 2780
18 e3700 --- --- 17900 --- --- 22800 89 5510
19 e4100 --- --- 17100 --- --- 24400 106 7000
20 e4700 --- --- 16700 --- --- 22400 83 5050
 
21 e7000 --- --- 15900 --- --- 21800 78 4580
22 11500 --- --- 14300 --- --- 19200 64 3320
23 18800 --- --- 14500 --- --- 17400 51 2400
24 34500 --- --- 12100 --- --- 17500 46 2170
25 49300 --- --- 12200 --- --- 16200 45 1980
 
26 48700 --- --- 12400 --- --- 14600 50 1960
27 48300 --- --- 13100 --- --- 13700 52 1930
28 47300 --- --- 14500 --- --- 13600 53 1950
29 48200 --- --- --- --- --- 13700 54 2010
30 46300 --- --- --- --- --- 10400 55 1550
 
31 41700 --- --- --- --- --- 10100 52 1420
 
TOTAL 468800 --- --- 650300 --- --- 502700 --- 94860

 
APRIL MAY JUNE



1 10300 50 1390 46100 36 4440 14300 66 2560
2 6800 49 945 43300 29 3350 19000 101 5240
3 e7500 50 1020 39100 33 3480 22200 86 5140
4 6820 54 1020 33000 33 2900 21000 76 4330
5 8170 62 1350 30800 31 2580 19600 70 3700
 
6 9100 71 1760 27300 35 2540 18900 64 3280
7 8460 80 1830 26600 39 2770 17700 64 3080
8 11000 82 2440 26500 36 2540 16800 81 3690
9 13500 83 3020 23800 30 1950 15500 89 3720
10 15400 78 3260 21700 28 1640 14400 72 2820
 
11 16700 74 3310 20500 27 1470 15400 103 4280
12 16000 77 3330 21400 26 1530 18500 158 7930
13 15000 84 3400 25100 47 3220 23400 174 11100
14 14700 91 3620 29100 60 4730 31500 171 14500
15 15900 102 4400 28800 53 4100 38000 155 15900
 
16 19900 206 11600 26500 52 3740 39700 118 12700
17 32000 299 25900 24600 43 2890 33800 95 8700
18 36400 338 33200 27600 36 2670 28700 72 5590
19 39000 163 16900 26400 36 2550 25600 54 3760
20 e37000 74 7370 23800 38 2440 e23500 41 2620
 
21 34100 57 5340 22300 54 3240 21200 42 2420
22 32600 61 5380 24300 75 4940 19100 46 2400
23 36800 61 6080 23600 101 6490 19300 46 2400
24 46700 47 5860 23500 126 7980 20900 51 2860
25 50200 41 5540 21600 101 5910 20000 58 3150
 
26 47100 41 5260 20300 74 4060 17400 64 3010
27 43800 43 5090 17500 72 3390 16300 63 2770
28 44300 43 5170 16100 92 4000 15800 62 2640
29 47000 40 5100 15900 84 3600 15400 72 2990
30 46900 43 5490 14800 73 2930 13300 102 3670
 
31 --- --- --- 13900 64 2410 --- --- ---
 
TOTAL 769150 --- 185375 785800 --- 106480 636200 --- 152950

 
JULY AUGUST SEPTEMBER



1 14300 112 4300 6660 47 839 5580 67 1010
2 13500 118 4290 5530 46 687 5260 48 692
3 14200 119 4560 5410 45 661 5290 35 508
4 13800 117 4340 5570 44 665 5100 31 430
5 13300 114 4080 4800 44 573 4930 30 404
 
6 14100 93 3540 5150 45 621 4580 30 369
7 12400 73 2440 5080 45 621 5160 30 423
8 10700 69 1980 5900 50 784 5060 35 480
9 8930 69 1660 4970 56 757 4110 43 486
10 8810 67 1600 4690 63 805 3570 44 423
 
11 8210 61 1350 4880 60 786 3640 42 410
12 8260 55 1220 4710 54 694 3420 42 394
13 7080 49 941 6950 81 1480 3760 45 454
14 6000 45 739 5840 116 1840 4160 51 577
15 5770 45 693 5630 84 1290 4370 60 704
 
16 5500 50 745 4910 60 795 2940 47 370
17 5980 56 907 5810 60 935 3880 30 322
18 6280 50 853 5330 63 909 3450 20 191
19 6880 44 805 6480 52 901 3370 25 227
20 6750 41 738 6130 39 640 3060 37 294
 
21 6800 39 723 6130 37 619 3660 52 526
22 7480 40 815 6640 39 708 4320 39 458
23 7670 42 863 5120 41 574 3070 39 328
24 9190 41 1000 7870 43 911 4450 43 510
25 7990 40 876 8020 34 738 2820 66 481
 
26 8010 47 1010 8710 34 803 3600 112 1140
27 7380 54 1060 7590 39 793 4060 91 1030
28 6960 52 978 7450 41 833 8000 60 1290
29 5220 48 674 7810 44 923 11200 96 2920
30 5660 45 693 5410 56 822 8810 89 2040
 
31 6740 46 839 5520 77 1140 --- --- ---
 
TOTAL 269850 --- 51312 186700 --- 26147 138680 --- 19891
e Estimated


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