Station list     Available data
ILLINOIS RIVER BASIN


05559600       ILLINOIS RIVER AT CHILLICOTHE, IL

 

LOCATION.-- Lat 40°55'45", long 89°27'42" (NAD of 1927), 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 November 1993, water years 1994 to 2000 (March to December), March 2001 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, 322 mg/L, Oct. 17; minimum daily, 18 mg/L, May 29.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 31,500 tons, May 14; minimum daily, 496 tons, Sept. 29.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
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 6560 54 949 27000 37 2690 14300 59 2290
2 5310 68 962 26500 25 1830 15500 80 3340
3 5040 68 924 23700 25 1590 16700 78 3510
4 5860 64 1020 24200 29 1910 15400 67 2790
5 9300 62 1540 21900 38 2230 12900 57 1980
 
6 9830 81 2150 19500 35 1850 16000 49 2120
7 9180 107 2640 18700 32 1600 14500 42 1660
8 6550 121 2130 18500 55 2760 13500 41 1510
9 5850 126 2010 15500 86 3590 12100 42 1370
10 6730 82 1430 16000 95 4110 11300 43 1310
 
11 8010 70 1520 14500 96 3760 11200 47 1420
12 8120 70 1540 13600 95 3490 10900 51 1490
13 12700 75 2590 12300 92 3030 11800 47 1490
14 25900 81 5680 13000 79 2790 12400 41 1360
15 33300 97 8810 11600 65 2030 12500 35 1170
 
16 36200 260 25400 10600 55 1590 12800 33 1130
17 34600 322 30100 9800 48 1280 13800 36 1360
18 32100 142 12300 9110 52 1270 15000 61 2480
19 31300 62 5200 10000 60 1620 18200 73 3580
20 28700 54 4210 8140 73 1600 19100 51 2630
 
21 27200 45 3280 9180 89 2210 18800 44 2240
22 24400 36 2370 8480 104 2370 16600 38 1690
23 25600 58 4020 8860 114 2740 17500 39 1860
24 30600 87 7260 7180 103 2010 17000 44 2020
25 33400 88 7920 12000 103 3350 15500 48 2030
 
26 36300 77 7570 12600 107 3630 14000 43 1700
27 35800 63 6110 11300 95 2890 12200 35 1170
28 32600 51 4490 11800 79 2500 12000 28 908
29 33400 53 4760 11600 61 1930 10400 27 747
30 31200 58 4900 10300 46 1290 7840 28 595
 
31 27100 49 3600 --- --- --- 6950 29 526
 
TOTAL 658740 --- 169385 427450 --- 71540 428690 --- 55476
 
JANUARY FEBRUARY MARCH
1 6760 --- --- 17600 --- --- 19200 47 2450
2 6500 --- --- 24700 --- --- 18200 46 2260
3 e7400 --- --- 28800 --- --- 18100 44 2130
4 e7100 --- --- 27500 --- --- 17400 42 1930
5 e6500 --- --- 25400 --- --- 19300 35 1850
 
6 e6300 --- --- 24800 --- --- 19900 28 1500
7 6820 --- --- 23000 --- --- 20300 34 1880
8 5650 --- --- 20900 --- --- 22000 132 8090
9 7700 --- --- 18800 --- --- 31400 228 19400
10 8900 --- --- 20500 --- --- 40100 198 21500
 
11 8840 --- --- 20000 --- --- 41300 164 18200
12 9210 --- --- 22500 --- --- 38800 155 16300
13 7070 --- --- 21100 --- --- 34100 108 10000
14 8710 --- --- 17600 --- --- 30100 53 4370
15 8570 --- --- 19500 --- --- 30900 45 3750
 
16 8010 --- --- 18500 --- --- 27300 46 3390
17 7190 --- --- 17500 --- --- 24500 49 3240
18 7430 --- --- 14500 --- --- 23600 36 2280
19 5570 --- --- 15800 --- --- 22300 25 1480
20 5570 --- --- 18100 --- --- 21300 26 1520
 
21 7200 --- --- 23800 --- --- 21700 39 2300
22 e6700 --- --- 26100 --- --- 17100 39 1800
23 8700 --- --- 25900 --- --- 16900 35 1580
24 6550 --- --- 24500 --- --- 17800 35 1700
25 5480 --- --- 26200 --- --- 17200 48 2190
 
26 7040 --- --- 23400 --- --- 15000 60 2430
27 5800 --- --- 21100 --- --- 14000 50 1870
28 6700 --- --- 19300 --- --- 13900 35 1330
29 7290 --- --- --- --- --- 14700 66 2620
30 6970 --- --- --- --- --- 16200 67 2930
 
31 9110 --- --- --- --- --- 17800 55 2610
 
TOTAL 223340 --- --- 607400 --- --- 702400 --- 150880
 
APRIL MAY JUNE
1 19400 42 2210 27600 64 4800 19200 24 1260
2 20800 39 2220 27000 41 2980 18300 30 1450
3 23500 147 9400 24600 38 2510 17200 31 1440
4 25000 134 9010 24100 34 2210 18500 64 3230
5 23800 77 4940 22100 33 1960 27600 105 7870
 
6 21900 60 3550 22000 33 1930 32400 100 8770
7 20600 58 3200 21500 26 1500 28400 91 6990
8 22300 61 3720 18700 22 1120 26000 83 5830
9 28700 120 9420 20500 47 2580 24000 78 5060
10 35000 104 9790 23800 54 3480 21300 73 4230
 
11 36300 50 4890 24600 39 2560 22000 69 4100
12 34700 49 4580 39000 92 10400 21900 69 4070
13 30600 56 4640 66100 129 23100 19100 72 3700
14 27600 48 3580 85100 138 31500 18000 75 3650
15 25900 37 2560 78000 122 25700 18100 76 3720
 
16 23900 34 2190 65600 105 18700 18500 49 2430
17 25000 34 2330 58200 77 12200 16000 95 4100
18 20900 40 2270 52300 60 8460 14300 115 4450
19 23600 47 3010 48700 48 6310 13500 115 4190
20 21100 52 2940 45200 43 5220 12600 94 3200
 
21 20000 56 3010 41000 30 3290 12200 76 2480
22 20400 62 3430 35600 33 3160 11800 76 2410
23 19000 57 2900 36300 24 2400 11300 84 2560
24 19400 60 3140 34900 21 2000 11000 92 2720
25 19500 64 3390 32900 21 1900 10300 92 2550
 
26 19900 70 3780 29800 22 1750 11600 96 3010
27 18400 59 2950 27200 22 1600 12700 102 3490
28 21500 49 2850 24900 20 1350 16600 114 5150
29 27200 71 5220 23100 18 1150 15400 117 4830
30 28800 84 6570 21500 19 1100 13100 113 4010
 
31 --- --- --- 20900 20 1120 --- --- ---
 
TOTAL 724700 --- 127690 1122800 --- 190040 532900 --- 116950
 
JULY AUGUST SEPTEMBER
1 12000 107 3460 e6000 103 1660 6050 95 1550
2 11600 98 3090 e5800 104 1630 4840 98 1280
3 10900 90 2660 e5500 88 1310 8070 80 1750
4 8300 82 1840 e6800 71 1300 6190 65 1080
5 7970 75 1600 e7000 55 1040 6240 70 1170
 
6 7030 78 1470 7970 62 1230 5730 76 1180
7 6790 84 1550 6470 75 1320 4930 82 1100
8 5120 84 1140 6090 76 1260 4590 81 1010
9 9070 68 1680 5470 73 1080 4830 76 998
10 10500 78 2220 4960 68 913 4310 72 841
 
11 10100 87 2370 5400 63 854 4460 74 886
12 8760 84 1990 4260 59 675 3780 77 785
13 8070 77 1680 5560 57 859 3170 80 688
14 7440 71 1420 7410 57 1140 4040 82 900
15 6580 70 1230 6610 61 1100 3320 85 759
 
16 5980 69 1110 8090 84 1830 e3000 94 754
17 4820 68 887 6580 108 1940 3600 105 914
18 4790 68 876 6180 101 1700 3250 108 943
19 5340 75 1090 6950 81 1500 3460 107 1000
20 4750 85 1090 6760 74 1360 4680 100 1270
 
21 4650 95 1190 7100 74 1430 6010 92 1490
22 5800 93 1450 11400 96 3000 5370 109 1440
23 4380 87 1030 18800 113 5760 6380 132 1910
24 4390 83 983 19500 109 5720 6720 113 2090
25 e5000 93 1250 19900 103 5520 4430 81 970
 
26 e4500 104 1270 18100 119 5790 3810 59 619
27 e5400 115 1680 15900 139 5960 4320 54 627
28 e5100 128 1770 14500 126 4940 3540 56 539
29 e4800 164 2130 12300 106 3550 3470 60 496
30 e4700 193 2440 7920 87 1880 4450 79 787
 
31 e5200 110 1540 6870 87 1610 --- --- ---
 
TOTAL 209830 --- 51186 278150 --- 70861 141040 --- 31826
e Estimated
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data