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.--
SURFACE-WATER QUALITY
 

SEDIMENT: May 1993 to current year.

REMARKS.-- Water discharge used to compute sediment 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.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 491 mg/L, July 20, 1996; minimum daily, 16 mg/L, Mar. 7, 1998.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 93,800 tons, July 20, 1996; minimum daily, 177 tons, Oct. 5, 1997.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 342 mg/L, April 21; minimum daily, 28 mg/L, Dec. 13.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 24,000 tons, April 21; minimum daily, 324 tons, Dec. 1.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
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 9690 74 1930 4430 62 748 e2800 43 324
2 8380 68 1550 3360 56 497 e2900 44 347
3 7660 66 1360 3770 58 597 e3700 64 636
4 9090 75 1840 3470 62 572 5900 85 1340
5 8790 79 1880 3740 67 703 9660 76 2010
 
6 8800 75 1780 3750 70 694 12000 66 2120
7 7590 72 1470 4150 69 779 10400 57 1590
8 5700 69 1060 3190 66 565 e8400 52 1190
9 5600 67 1000 e3100 65 544 e7200 49 944
10 4360 66 779 e2900 65 509 e8000 45 975
 
11 4940 65 863 e2800 65 489 e7200 41 802
12 3920 64 674 e2600 61 429 e6500 34 603
13 5600 74 1130 e2900 57 443 e5800 28 442
14 4690 73 923 e3400 53 482 e5900 50 797
15 3370 66 594 e3700 49 492 e5400 84 1230
 
16 4140 58 646 e3500 56 527 e5200 81 1140
17 3510 52 497 e3300 67 596 e5900 78 1250
18 4230 51 571 e3100 80 667 e6400 76 1310
19 4010 52 563 e3300 85 758 e5800 76 1190
20 3030 53 434 e3600 88 852 e5300 73 1050
 
21 2860 54 416 e3500 89 840 e5100 50 692
22 4520 55 658 e3300 85 754 e4800 34 446
23 2670 55 404 e3500 80 756 4520 49 593
24 2960 56 444 e3800 76 777 6260 53 900
25 3380 54 496 e4200 71 810 4100 53 597
 
26 4200 52 579 e4000 65 703 4830 54 691
27 3600 49 488 e4700 59 746 4880 54 717
28 3540 47 449 6190 53 897 3750 54 537
29 3220 46 407 6690 48 864 3850 54 584
30 3560 66 653 e4800 45 585 e4600 55 679
 
31 4380 70 830 --- --- --- e5400 55 800
 
TOTAL 155990 --- 27368 112740 --- 19675 182450 --- 28526
 
JANUARY FEBRUARY MARCH
1 e5300 --- --- e3900 --- --- 14800 56 2220
2 e5200 --- --- e3800 --- --- 12700 53 1810
3 e5200 --- --- e3900 --- --- 12100 50 1640
4 e5600 --- --- e4300 --- --- 11100 57 1710
5 e5100 --- --- e3900 --- --- 11000 66 1970
 
6 e5000 --- --- e4000 --- --- 9470 55 1420
7 e4900 --- --- e4000 --- --- 7540 44 892
8 4800 --- --- e4000 --- --- 5190 85 1160
9 7550 --- --- e4000 --- --- 9350 96 2440
10 6070 --- --- e4400 --- --- 8400 98 2200
 
11 8120 --- --- e5200 --- --- 8660 92 2140
12 9270 --- --- e5000 --- --- 5710 86 1320
13 7250 --- --- e4800 --- --- 5860 85 1340
14 e6100 --- --- e5400 --- --- 5340 62 900
15 e5500 --- --- e5000 --- --- 5970 56 913
 
16 e5600 --- --- e5500 --- --- 7560 52 1050
17 e5200 --- --- e6500 --- --- 6650 49 881
18 e4800 --- --- 7290 --- --- 6140 60 997
19 e4400 --- --- 6390 --- --- 7040 74 1400
20 e4700 --- --- 8700 --- --- 6860 66 1240
 
21 e4000 --- --- 7220 --- --- 8310 61 1390
22 e4400 --- --- 9330 --- --- 8270 84 1860
23 e4100 --- --- 8400 --- --- 8060 63 1380
24 e4400 --- --- 12400 --- --- 6370 66 1150
25 e4600 --- --- 13800 --- --- 7810 70 1460
 
26 e4300 --- --- 14300 --- --- 5730 68 1070
27 e4000 --- --- 16100 --- --- 8600 66 1530
28 e3800 --- --- 14000 --- --- 8520 59 1350
29 e3900 --- --- 11300 --- --- 7440 56 1130
30 e4000 --- --- --- --- --- 7880 68 1440
 
31 e4100 --- --- --- --- --- 7350 73 1460
 
TOTAL 161260 --- --- 206830 --- --- 251780 --- 44863
 
APRIL MAY JUNE
1 7330 67 1310 15700 75 3160 23200 80 5040
2 6040 60 989 15700 70 2960 27600 71 5310
3 7150 59 1130 14400 71 2740 25600 87 6010
4 6080 59 975 13600 77 2820 23000 117 7240
5 5000 59 813 12500 79 2640 21500 105 6130
 
6 6650 59 1050 9570 68 1770 20700 80 4500
7 7730 59 1250 9860 59 1560 19100 75 3840
8 6690 59 1070 8640 57 1320 18400 74 3690
9 7110 60 1150 12100 89 2990 17300 73 3430
10 7950 60 1280 14800 97 3870 15300 73 3000
 
11 7970 60 1280 14300 85 3270 16700 74 3360
12 8380 60 1350 16700 67 3030 16900 95 4360
13 6210 60 1000 17900 53 2550 19000 132 6780
14 5050 60 811 17800 55 2640 22100 218 13200
15 6280 85 1440 15900 64 2740 23900 209 13500
 
16 6490 133 2350 14800 73 2930 25300 166 11400
17 10500 118 3380 13400 73 2640 24600 156 10400
18 11700 124 3900 13000 71 2530 22600 140 8540
19 11600 145 4510 15900 75 3200 20000 122 6580
20 15700 197 8680 16700 79 3580 18400 108 5390
 
21 25800 342 24000 16000 85 3690 21600 114 6690
22 e30000 241 19500 16000 92 3960 25500 177 12300
23 e28000 223 16800 16700 98 4420 26400 154 10900
24 e26000 225 15800 17800 102 4910 25600 122 8470
25 24300 172 11400 16600 105 4710 29400 78 6200
 
26 22800 121 7450 15300 108 4460 33000 93 8290
27 21100 97 5550 15100 112 4580 32100 104 8990
28 19500 82 4310 16800 136 6200 28800 93 7220
29 18600 69 3450 18300 153 7560 26100 82 5760
30 16500 59 2620 17900 122 5880 22100 72 4270
 
31 --- --- --- 17000 95 4370 --- --- ---
 
TOTAL 390210 --- 150598 466770 --- 109680 691800 --- 210790
 
JULY AUGUST SEPTEMBER
1 19500 57 3030 10000 98 2670 6200 68 1150
2 17500 45 2120 11100 61 1830 4710 69 874
3 19100 60 3100 11800 67 2120 5250 70 994
4 21500 111 6600 10400 68 1910 6180 71 1180
5 27200 128 9350 8350 63 1410 5430 72 1050
 
6 25400 116 7980 9220 58 1440 5200 69 965
7 24200 105 6820 10800 60 1750 4830 65 847
8 22200 86 5150 11500 65 2020 4600 61 750
9 21000 84 4770 12100 70 2310 4250 58 670
10 22200 101 6170 11000 70 2090 4530 56 681
 
11 34100 151 14100 10300 68 1910 4100 54 598
12 38100 192 19700 8660 66 1550 13000 53 1900
13 35900 108 10500 7480 65 1310 13100 69 2410
14 32100 79 6790 6960 63 1180 12700 61 2100
15 27600 68 5040 7330 63 1250 11600 51 1590
 
16 23300 59 3680 6990 63 1180 9670 52 1360
17 19700 62 3300 7270 85 1710 8820 54 1290
18 18200 71 3500 8260 87 1950 6900 57 1050
19 15700 71 3000 7950 72 1550 5840 62 996
20 14600 68 2660 7170 60 1160 6180 70 1170
 
21 15000 67 2710 6270 74 1250 7760 79 1660
22 13300 67 2400 5950 84 1360 6970 93 1740
23 12600 66 2250 6980 94 1750 9060 108 2680
24 11400 67 2060 7180 111 2160 10300 93 2600
25 10400 88 2450 5990 131 2120 11100 96 2890
 
26 8440 114 2600 5880 124 1960 9490 83 2130
27 8290 109 2440 5990 107 1730 9210 62 1540
28 8880 101 2440 5340 93 1340 8180 61 1340
29 8940 95 2280 6950 80 1500 7320 68 1340
30 8490 110 2530 5870 74 1170 6610 80 1390
 
31 9190 135 3350 5780 69 1080 --- --- ---
 
TOTAL 594030 --- 154870 252820 --- 51720 229090 --- 42935
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data