Station list     Available data
ILLINOIS RIVER BASIN


05586100       ILLINOIS RIVER AT VALLEY CITY, IL

 

LOCATION.-- Lat 39°42'12", long 90°38'43" (NAD of 1927), in SE1/4NW1/4 sec.34, T.15 N., R.14 W., Scott County, Hydrologic Unit 07130011, on upstream side of Norfolk & Southern Corporation Railroad bridge at Flints Creek, 0.4 mi east of Valley City, 1.8 mi downstream from Mauvaise Terre Creek, and at mile 61.3. Auxiliary gage 10.0 miles upstream.
 

DRAINAGE AREA.-- 26,743 mi2, does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1938 to current year. Prior to October 1960, at site 0.2 mi upstream at same datum. Prior to October 1989, published as "at Meredosia." Records are considered equivalent.
 

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1975-93 and 1996 to current year.
 

SEDIMENT: February 1980 to current year.
 

SPECIFIC CONDUCTANCE: Water years 1975-81.
 

WATER TEMPERATURE: Water years 1975-81.
 

MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996; sediment concentration and particle size, water years 1996-2003.

BIOLOGICAL
 

ALGAE: Water years 1980-81.
 

BENTHIC MACROINVERTEBRATES: Water years 1997-98, and 2002.
 

FISH: Water year 1998, and 2003.
 

HABITAT: Water years 1997-98, and 2003.
 

GAGE.-- U.S. Army Corps of Engineer's water-stage recorder and satellite telemeter, crest-stage gage, and water-quality monitor. Datum of gage is 418.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Nov. 25, 1992 and Oct. 1, 1994 to current; auxiliary gage (05585500) at site 10.0 mi upstream. Nov. 25, 1992 to Sept. 30, 1994; auxiliary gage operated at the Valley City site (05586100).
 

REMARKS.-- Occasional regulation at low flow by navigation dam at La Grange. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal. Suspended-sediment samples were collected by a local observer twice weekly with additional samples collected during high runoff periods. Since February 1994, samples used to compute sediment record have been collected at upstream side Rt. 106 bridge at Florence at mile 56.
 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft3/s, May 26-28, 1943; maximum gage height, 28.61 ft, May 26, 1943; minimum daily discharge, 1,330 ft3/s, Sept. 2, 1984.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,720 mg/L, Apr. 14, 1981; minimum daily, 14 mg/L, Dec. 26, 1984, July 21, 1993.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 410,000 tons, June 4, 1980; minimum daily, 172 tons, Sept. 2, 1984.
 

EXTREMES FOR CURRENT YEAR.--

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 1,040 mg/L, May 12; minimum daily, 29 mg/L, Nov. 20.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 102,000 tons, May 18; minimum daily, 344 tons, Nov. 20.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
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 5400 55 770 5030 78 1070 4830 72 945
2 5940 63 1000 5370 85 1230 5370 71 1040
3 6040 58 950 5540 96 1440 4740 63 806
4 5840 61 975 5210 62 869 5690 74 1140
5 5660 80 1230 5080 46 645 4080 58 642
 
6 6850 94 1750 5560 84 1270 5380 80 1170
7 6420 76 1320 5460 72 1080 5640 79 1200
8 8190 100 2210 6300 86 1470 4670 66 832
9 7700 75 1580 6020 72 1190 4620 102 1270
10 6860 60 1110 4850 41 547 4760 122 1570
 
11 7180 77 1480 4620 36 453 4580 79 977
12 6680 65 1180 5030 50 695 4860 87 1140
13 5710 55 849 5230 68 964 4530 81 996
14 6090 83 1370 4550 37 465 5660 103 1580
15 5730 45 709 4630 83 1060 6330 106 1820
 
16 5800 76 1200 4590 37 459 5880 114 1820
17 5570 42 635 5320 81 1160 6040 108 1760
18 6370 67 1190 5820 96 1530 8290 173 3960
19 5920 50 811 5090 42 589 8230 172 3830
20 5490 43 642 4370 29 344 7680 150 3100
 
21 5310 40 579 4700 56 718 8300 166 3720
22 5480 42 621 4470 54 649 8970 192 4660
23 5590 45 687 5190 69 965 9250 209 5220
24 5650 39 606 4810 47 610 9200 208 5170
25 5610 47 722 4690 48 615 9650 219 5720
 
26 4860 39 510 4990 58 778 9160 168 4170
27 5030 39 532 5130 58 803 7960 117 2520
28 5280 32 462 5040 58 783 7320 92 1820
29 5470 32 469 4910 61 813 6260 76 1280
30 5620 91 1380 3800 61 623 6740 76 1390
 
31 5160 58 816 --- --- --- 6230 77 1310
 
TOTAL 184500 --- 30345 151400 --- 25887 200900 --- 68578
 
JANUARY FEBRUARY MARCH
1 7010 144 2720 e5300 53 756 7360 61 1210
2 8140 206 4560 e6000 46 748 7640 63 1300
3 8570 201 4660 e5800 43 669 7880 65 1390
4 7890 190 4050 e5700 48 735 7330 62 1240
5 7820 182 3830 e7400 92 1830 7090 59 1130
 
6 7640 181 3730 e7000 92 1740 7520 69 1410
7 7850 179 3810 e6600 76 1350 7860 76 1610
8 6620 117 2110 e6300 67 1140 7360 64 1280
9 5780 58 913 6100 64 1050 6510 61 1070
10 6090 138 2290 5860 65 1040 6810 67 1230
 
11 6460 153 2680 5790 67 1050 7530 83 1690
12 7140 177 3420 5420 70 1030 8290 107 2390
13 6200 127 2150 6620 84 1510 8810 123 2930
14 5230 62 886 7480 99 2010 9390 138 3540
15 5680 116 1780 9650 134 3500 10100 147 4010
 
16 5790 127 2000 9160 111 2760 10800 166 4880
17 e6000 152 2460 8020 81 1750 11000 158 4690
18 e5400 60 877 7900 77 1640 10500 85 2410
19 e5600 212 3210 7800 89 1870 12100 143 4790
20 e5800 173 2710 9040 113 2770 15800 293 12500
 
21 e6000 107 1740 9750 132 3480 15400 180 7540
22 e5700 97 1490 9760 120 3170 12700 151 5170
23 e5100 94 1300 9240 95 2380 12200 137 4510
24 e5200 91 1280 8300 70 1590 12400 144 4820
25 e5300 88 1260 7770 58 1230 11800 136 4340
 
26 e5200 85 1200 7480 57 1150 11700 131 4140
27 e5100 82 1130 7160 57 1100 12300 145 4860
28 e4700 79 1000 7120 56 1080 11900 129 4160
29 e5000 73 984 --- --- --- 11000 98 2920
30 e5200 66 931 --- --- --- 11500 100 3100
 
31 e4700 60 759 --- --- --- 11600 100 3140
 
TOTAL 189910 --- 67920 205520 --- 46128 312180 --- 105400
 
APRIL MAY JUNE
1 11100 102 3080 11100 68 2030 19100 179 9250
2 10900 102 3060 13300 91 3300 17400 165 7740
3 10900 101 2990 16400 132 5870 17000 152 7000
4 10800 100 2910 19800 175 9390 17400 146 6870
5 13800 177 6710 e24500 291 19200 17400 147 6930
 
6 15700 289 12300 e26900 482 34900 17600 174 8260
7 17100 262 12100 e28000 366 27600 17800 172 8260
8 18900 276 14300 e28900 477 37200 16600 157 7010
9 20300 340 18600 e29900 761 61400 15000 142 5730
10 20700 318 17800 e30800 682 56700 14700 136 5410
 
11 20900 299 16900 e32000 570 49200 15300 186 7690
12 20700 292 16300 32500 1040 91100 16500 140 6240
13 20500 279 15400 35100 837 79200 19000 147 7590
14 19500 238 12600 37700 753 76400 21900 194 11400
15 17700 196 9370 39400 641 68200 21500 236 13700
 
16 15100 162 6630 40500 597 65300 21000 247 14000
17 15300 202 8400 41200 835 92900 20300 241 13200
18 17100 274 12700 41600 909 102000 20000 233 12600
19 17300 229 10700 41400 760 85000 19800 226 12100
20 14700 152 6070 40900 505 55800 19700 217 11500
 
21 11300 99 3050 39600 296 31600 19600 202 10700
22 10800 89 2610 38200 290 29900 19000 187 9600
23 11300 87 2650 36900 292 29100 17900 170 8200
24 12200 110 3680 35600 294 28200 15100 146 5940
25 13300 149 5400 34000 293 26900 12600 122 4160
 
26 15700 295 12500 32500 261 22900 13500 126 4600
27 14000 214 8150 30700 229 19000 13700 105 3900
28 11700 134 4250 28900 220 17100 13100 101 3590
29 10600 88 2540 e26000 212 14900 12500 100 3380
30 11000 81 2400 e23200 203 12800 11700 108 3410
 
31 --- --- --- 20500 193 10700 --- --- ---
 
TOTAL 450900 --- 256150 958000 --- 1265790 513700 --- 239960
 
JULY AUGUST SEPTEMBER
1 10500 128 3660 31600 258 22000 17400 375 17800
2 10100 89 2420 30200 263 21400 18400 355 17900
3 11400 94 2900 29000 267 20900 14600 214 8500
4 11000 73 2180 28000 272 20600 12400 162 5410
5 10300 72 2000 26800 271 19600 10900 126 3710
 
6 9630 71 1850 25700 254 17700 9790 125 3300
7 8840 71 1690 24400 236 15400 9960 151 4060
8 9450 81 2080 22100 217 13000 9920 159 4270
9 13500 109 4040 18300 197 9750 9540 158 4070
10 21700 239 14600 15500 176 7350 8140 146 3220
 
11 28400 379 29100 13700 156 5770 7500 131 2670
12 30400 491 40300 12700 139 4790 6240 96 1630
13 32900 552 49000 12500 123 4140 4650 67 842
14 34200 485 44800 12600 107 3630 4730 63 801
15 34400 419 38900 11900 93 2990 5610 73 1100
 
16 34100 313 28800 10400 85 2390 5560 76 1140
17 33800 308 28100 9610 77 2000 5340 71 1010
18 36000 480 47000 8510 94 2170 4120 66 731
19 38200 584 60200 8480 83 1890 4620 72 907
20 38100 377 38800 8270 75 1680 6820 99 1830
 
21 37100 320 32000 7510 68 1370 7080 101 1930
22 36400 322 31700 7050 60 1130 6580 93 1670
23 36300 326 31900 7360 61 1210 5000 77 1040
24 36200 319 31200 6830 55 1020 5100 74 1020
25 36200 320 31300 7180 63 1220 4940 74 994
 
26 36100 340 33200 7350 65 1300 4710 71 909
27 35600 240 23100 6760 39 720 4700 69 883
28 35400 239 22900 6650 47 847 5260 70 990
29 34900 244 23000 5200 45 632 5060 64 872
30 33900 248 22700 5880 79 1260 5410 66 925
 
31 32800 253 22400 6760 116 2260 --- --- ---
 
TOTAL 847820 --- 747820 434800 --- 212119 230080 --- 96134
 
YEAR 4679710 3162231


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data