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, 193 mg/L, April 6, 13; minimum daily, 29 mg/L, Mar. 12.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 17,800 tons, June 7; minimum daily, 657 tons, Nov. 5.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
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 4680 78 984 4110 62 696 10400 44 1240
2 5350 83 1200 5810 56 874 10000 47 1270
3 7200 94 1870 5840 50 782 10100 45 1220
4 9290 105 2630 5720 48 746 9390 42 1060
5 10600 94 2670 5020 48 657 e7500 43 884
 
6 10500 93 2630 5090 49 673 e5800 68 1070
7 9180 97 2410 6830 56 1050 e6200 --- ---
8 9120 100 2470 9330 62 1560 e6500 --- ---
9 8220 96 2130 11900 65 2100 e6200 --- ---
10 6980 89 1680 16200 72 3150 e6200 --- ---
 
11 7100 82 1580 18700 78 3950 e6200 --- ---
12 5950 78 1250 16800 82 3730 e4800 --- ---
13 4620 74 922 15300 86 3540 e3600 --- ---
14 5230 70 984 16300 89 3920 e3900 --- ---
15 4710 66 845 15000 83 3360 e4300 --- ---
 
16 5950 69 1120 15000 74 2970 e4100 --- ---
17 5390 74 1080 15000 65 2620 e3900 --- ---
18 5650 79 1210 12800 57 1970 e4700 --- ---
19 5220 81 1150 11400 56 1730 e3800 --- ---
20 5150 83 1150 11000 57 1710 e4200 --- ---
 
21 5280 84 1190 10700 58 1690 e4800 --- ---
22 5080 85 1170 9690 59 1550 e5200 --- ---
23 5250 85 1200 8380 61 1380 e5400 --- ---
24 5710 73 1130 8780 63 1490 e5500 --- ---
25 5360 58 845 8960 64 1560 e5300 --- ---
 
26 6000 59 963 8480 65 1490 e4900 --- ---
27 6300 66 1130 9360 58 1460 e4600 --- ---
28 5020 74 989 10600 49 1390 e4400 --- ---
29 5210 79 1120 8880 40 965 e4300 --- ---
30 5410 75 1100 9690 41 1080 e4300 --- ---
 
31 6330 69 1180 --- --- --- e4300 --- ---
 
TOTAL 197040 --- 43982 316670 --- 55843 174790 --- ---
 
JANUARY FEBRUARY MARCH
1 e4400 --- --- 25800 --- --- 44900 109 13300
2 e4400 --- --- 25200 --- --- 42000 96 10900
3 e4400 --- --- 23500 --- --- 38300 93 9610
4 e4400 --- --- 23500 --- --- 35800 81 7810
5 e4400 --- --- 21600 --- --- 32400 73 6370
 
6 e4300 --- --- 20600 --- --- 29100 61 4830
7 e4300 --- --- 19500 --- --- 26800 52 3770
8 e4200 --- --- 19200 --- --- 25900 44 3090
9 e4200 --- --- 34800 --- --- 23000 41 2550
10 e4200 --- --- 52300 --- --- 20400 36 1960
 
11 e4300 --- --- 65000 --- --- 21200 30 1740
12 e4300 --- --- 71500 --- --- 18700 29 1470
13 e4500 --- --- 62300 --- --- 19800 31 1670
14 e4700 --- --- 55000 --- --- 19100 46 2360
15 e5000 --- --- 51200 --- --- 20900 43 2410
 
16 e5700 --- --- 51500 --- --- 22100 43 2540
17 e6400 --- --- 46900 --- --- 23100 64 3990
18 e7100 --- --- 40300 --- --- 24400 51 3340
19 e8200 --- --- 37500 --- --- 25300 41 2770
20 e9400 --- --- 36000 --- --- 25200 44 2980
 
21 e10000 --- --- 31200 --- --- 24100 40 2590
22 e9200 --- --- 26800 --- --- 22800 45 2780
23 e8400 --- --- 24900 --- --- 22000 43 2530
24 e7300 --- --- 22300 --- --- 21800 42 2470
25 e6600 --- --- 35500 --- --- 20500 42 2350
 
26 e7200 --- --- 53700 --- --- 18000 45 2180
27 e6500 --- --- 55900 --- --- 17500 32 1520
28 e6800 --- --- 49600 --- --- 15000 29 1160
29 e6400 --- --- --- --- --- 16100 36 1580
30 15500 --- --- --- --- --- 14900 41 1630
 
31 23300 --- --- --- --- --- 14000 65 2470
 
TOTAL 210000 --- --- 1083100 --- --- 745100 --- 112720
 
APRIL MAY JUNE
1 14500 83 3230 11800 71 2280 16700 118 5330
2 13000 99 3470 10600 62 1760 19200 109 5670
3 13300 108 3890 9690 58 1510 18700 100 5060
4 11300 116 3520 9140 55 1360 17800 96 4610
5 10600 151 4280 7840 51 1090 23400 123 7900
 
6 11100 193 5790 8070 48 1050 34700 157 14800
7 8050 167 3560 9370 45 1140 40900 162 17800
8 14900 114 4680 7440 45 901 42700 116 13400
9 14300 86 3310 7220 46 896 40000 72 7840
10 14000 107 4040 7390 49 985 35900 66 6370
 
11 13800 142 5250 10200 55 1520 32300 84 7310
12 16800 174 8000 10800 67 1960 29600 67 5320
13 20800 193 10800 11200 79 2400 27100 37 2730
14 20200 155 8460 10500 67 1920 24900 31 2060
15 20600 114 6320 10400 59 1660 24400 33 2140
 
16 22100 133 7960 10300 57 1580 22000 35 2050
17 21300 171 9810 9660 60 1570 19800 38 2030
18 18200 161 7930 10200 66 1810 17800 64 3070
19 16000 138 5960 9530 72 1840 19500 60 3160
20 14900 117 4730 8870 78 1860 17000 64 2920
 
21 16300 144 6400 9500 84 2160 16100 49 2120
22 17900 183 8800 9510 93 2380 16200 47 2070
23 17500 147 6870 9810 102 2700 14200 73 2810
24 20300 91 5030 9060 110 2690 12500 103 3460
25 18200 73 3560 9230 107 2650 12500 106 3580
 
26 16100 63 2760 9860 100 2650 12000 88 2840
27 17300 60 2830 15000 93 3760 11600 95 2980
28 14800 61 2420 17000 91 4210 11200 104 3140
29 14000 68 2570 16800 93 4220 10600 103 2950
30 12900 77 2700 16100 108 4660 7470 100 2030
 
31 --- --- --- 16800 134 6080 --- --- ---
 
TOTAL 475050 --- 158930 328890 --- 69252 648770 --- 149550
 
JULY AUGUST SEPTEMBER
1 8220 124 2760 5880 66 1040 9370 101 2580
2 5710 107 1650 7700 92 2020 9230 85 2110
3 9460 138 3520 14300 168 6500 8460 84 1920
4 12700 107 3680 9710 161 4170 9180 88 2170
5 10900 74 2180 7520 134 2770 7290 88 1740
 
6 8530 71 1650 7090 107 2050 5660 94 1440
7 8870 71 1710 5920 86 1400 4490 103 1250
8 9760 71 1880 4900 69 925 5750 99 1520
9 12000 71 2290 4090 62 723 7840 90 1910
10 10400 70 1960 7710 76 1600 8080 85 1850
 
11 10200 70 1930 4390 70 854 6930 91 1710
12 9720 78 2040 5200 90 1250 6640 99 1770
13 9790 88 2320 5630 103 1570 7700 103 2140
14 8240 87 1940 3490 85 812 6920 106 1980
15 6540 83 1470 4320 90 1070 6010 97 1580
 
16 5580 85 1280 4720 94 1220 5140 82 1140
17 6050 88 1430 4190 87 1010 4740 67 860
18 e6800 79 1460 4990 98 1310 4560 64 789
19 6500 75 1290 7500 88 1780 9700 81 2230
20 5880 93 1470 5390 66 961 12400 98 3290
 
21 5410 108 1580 4940 76 1010 14200 78 2970
22 6300 101 1710 4490 91 1110 13900 89 3350
23 7630 97 1990 6170 88 1470 14800 87 3530
24 9820 81 2150 6680 83 1500 15200 78 3220
25 11100 92 2880 8450 84 1930 13600 58 2120
 
26 12800 98 3420 13000 115 4040 11500 60 1880
27 10300 62 1740 10600 83 2380 11300 65 1990
28 8440 51 1150 11200 74 2230 10500 79 2240
29 8320 49 1100 9430 78 1970 8630 73 1710
30 6470 53 930 7840 81 1730 8260 57 1270
 
31 7040 60 1130 11500 102 3240 --- --- ---
 
TOTAL 265480 --- 59690 218940 --- 57645 267980 --- 60259
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data