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, 1997-98, and 2002-03.
 

BENTHIC MACROINVERTEBRATES: Water years 1997-98 and 2002.
 

FISH: Water year 1998 and 2003-04.
 

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 this 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, 1,280 mg/L, May 26; minimum daily, 16 mg/L, Jan. 20.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 138,000 tons, May 26; minimum daily, 533 tons, Sep. 30.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004
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 6140 69 717 6650 74 1300 30900 244 20300
2 5820 73 1150 6970 74 1410 30000 228 18500
3 5030 72 981 7600 75 1530 28600 214 16600
4 4390 71 845 8680 96 2310 e26100 206 14500
5 4770 70 907 11600 160 5220 e18400 199 11600
 
6 4040 70 759 15800 160 6710 17100 189 8780
7 3150 69 584 17500 156 7340 16300 171 7560
8 3520 68 645 17300 151 7040 15400 154 6400
9 4630 66 830 17300 146 6810 15100 148 6060
10 5720 92 1420 16400 141 6310 e18500 283 17800
 
11 4470 82 988 15700 136 5780 e27000 726 53400
12 3700 68 685 14300 130 5030 29300 684 54200
13 4020 57 620 e12500 120 3920 30600 568 46900
14 4030 59 646 12000 108 3510 31900 452 39000
15 3960 64 683 12000 93 3000 32800 355 31400
 
16 4480 68 828 10900 77 2270 32100 324 28100
17 5680 73 1120 11200 61 1840 30500 301 24800
18 6040 77 1260 13900 65 2560 29600 277 22100
19 5860 82 1300 20800 146 8000 28300 253 19300
20 5220 85 1200 e23500 305 21100 27000 229 16700
 
21 5370 84 1220 27200 517 38100 24400 206 13600
22 5190 83 1160 29300 536 42400 e19500 186 10400
23 4770 81 1050 30800 506 42100 17300 180 8380
24 5430 80 1170 31900 459 39300 18200 175 8590
25 4250 78 895 32200 411 35700 19000 170 8730
 
26 4180 76 863 32300 363 31600 19000 165 8460
27 4080 75 825 32700 315 27800 19400 160 8400
28 4220 73 835 32600 279 24600 19300 155 8110
29 5260 72 1030 32400 274 24000 18800 149 7550
30 6330 73 1240 31700 259 22200 19000 138 7090
 
31 5740 73 1130 --- --- --- 19300 127 6620
 
TOTAL 149490 --- 29586 585700 --- 430790 728700 --- 559930
 
JANUARY FEBRUARY MARCH
1 19400 116 6060 e7400 75 2980 17700 154 7390
2 19700 105 5560 e6500 76 3090 14900 155 6220
3 19700 94 4970 e6900 76 3280 14200 157 6000
4 21600 104 6110 e7200 77 3290 15100 216 8850
5 23200 168 10500 e7500 77 3350 21000 300 17100
 
6 23700 167 10700 e8000 78 3600 e23900 383 24900
7 22300 162 9750 e8500 78 3900 26500 457 32800
8 21500 156 9040 e9400 79 3980 29200 504 39700
9 21600 150 8780 e10000 79 3920 31400 507 43000
10 22400 145 8770 e8400 80 3910 33000 396 35300
 
11 22600 139 8500 e9400 81 3850 34200 332 30600
12 22600 131 8010 e10000 82 3630 34700 304 28500
13 22200 116 6970 e12000 82 3650 34600 279 26000
14 21000 101 5710 e9400 83 3180 34200 253 23400
15 19700 85 4520 e11000 84 2770 33300 231 20800
 
16 19400 69 3620 10100 85 2330 32600 218 19200
17 18600 54 2690 8980 91 2210 31600 206 17600
18 17800 38 1820 9060 98 2390 30600 193 16000
19 17000 22 1020 9890 104 2790 29300 181 14300
20 14800 16 643 11000 111 3290 28200 169 12900
 
21 13600 66 2430 11700 118 3720 26100 156 11000
22 12600 71 2400 12500 124 4210 e23200 144 8940
23 12400 65 2150 13400 134 4860 20500 141 7810
24 12100 64 2100 15400 154 6410 18900 166 8450
25 12300 66 2200 16700 175 7900 15800 192 8160
 
26 11500 68 2120 17800 180 8650 14900 218 8760
27 10200 70 1940 18400 156 7750 18600 244 12300
28 e9400 72 2040 18200 153 7510 22100 279 16700
29 e9800 74 2630 18400 153 7640 e25300 331 23100
30 e7000 74 2840 --- --- --- 29100 356 27900
 
31 e6200 75 2870 --- --- --- 31900 338 29100
 
TOTAL 527900 --- 149463 323130 --- 124040 796600 --- 592780
 
APRIL MAY JUNE
1 34400 336 31300 17200 152 7080 43600 540 63500
2 36500 380 37500 18100 153 7490 44500 392 47100
3 38200 370 38100 18500 153 7660 45600 262 32200
4 39300 238 25300 18500 141 7050 46000 272 33800
5 40000 211 22800 17400 124 5850 46400 226 28400
 
6 40100 186 20100 16200 109 4780 46900 169 21400
7 39600 156 16700 16100 103 4490 47500 143 18400
8 38700 150 15700 16300 101 4440 47800 131 16900
9 37700 169 17100 15800 96 4090 47700 129 16600
10 36200 173 16900 14000 82 3110 47500 132 16900
 
11 34600 147 13800 12600 68 2300 47400 166 21200
12 33100 151 13400 13600 65 2390 47500 184 23700
13 31400 139 11800 13600 79 2900 47100 157 20000
14 29300 115 9050 14300 209 8220 46700 151 19000
15 25300 103 7060 16600 453 20400 47500 207 26600
 
16 e20100 58 3230 e20100 550 32700 49600 358 48000
17 16600 53 2370 e25200 338 23100 50600 244 33400
18 14600 43 1700 27400 366 27000 50700 211 28900
19 12200 56 1840 29200 295 23200 51100 199 27400
20 12200 72 2360 30900 329 27500 51200 143 19800
 
21 12800 65 2240 32300 461 40200 51200 126 17500
22 13400 86 3110 33000 397 35400 50900 120 16500
23 14500 108 4240 33800 291 26500 50100 112 15200
24 16400 99 4360 34200 308 28500 49100 115 15200
25 17800 117 5650 38500 627 65500 48100 131 17100
 
26 17500 121 5690 39900 1280 138000 46600 121 15200
27 17400 113 5320 42000 587 66500 45200 118 14400
28 18300 103 5120 42200 446 50900 43500 125 14700
29 18000 129 6310 41400 344 38500 41800 129 14600
30 17000 138 6350 41300 243 27000 40300 135 14700
 
31 --- --- --- 42800 277 32100 --- --- ---
 
TOTAL 773200 --- 356500 793000 --- 774850 1419700 --- 718300
 
JULY AUGUST SEPTEMBER
1 38400 156 16200 9440 64 1630 24900 387 26100
2 36800 223 22100 9090 74 1800 25200 326 22200
3 35500 227 21800 9820 84 2230 25100 299 20300
4 33600 195 17700 10400 94 2660 24700 275 18400
5 31800 234 20000 10100 105 2860 24200 250 16300
 
6 29800 277 22200 10300 115 3190 e23100 204 13100
7 26200 303 21500 11400 125 3860 e19700 106 6200
8 e21800 270 15900 11200 134 4060 18000 88 4260
9 19400 230 12100 10800 131 3820 16200 79 3480
10 19300 191 9950 10300 114 3180 12000 71 2290
 
11 20000 161 8710 9190 106 2630 8490 62 1430
12 21500 163 9470 8720 98 2310 7620 54 1100
13 22700 167 10200 7800 90 1900 7580 50 1020
14 22500 171 10400 7270 82 1620 8070 62 1370
15 22000 175 10400 7230 76 1480 9840 105 2790
 
16 20900 179 10100 7880 77 1630 8600 99 2310
17 20500 184 10200 7720 78 1620 10200 135 3730
18 19900 184 9880 6870 79 1470 11900 111 3560
19 18600 174 8710 6570 81 1430 10900 97 2870
20 16900 162 7400 7730 82 1710 8250 87 1940
 
21 14200 151 5780 8200 83 1850 7470 78 1580
22 13400 139 5050 8680 85 1990 6650 72 1300
23 13300 128 4590 8360 87 1960 6680 67 1210
24 14000 116 4380 8700 102 2400 6390 62 1060
25 13900 106 3960 10700 329 10000 6640 56 1010
 
26 13300 99 3560 20500 343 18500 6600 51 904
27 11900 92 2970 19900 334 17800 6420 45 787
28 9610 86 2230 e21900 495 31200 5850 41 653
29 8710 79 1860 25300 562 38400 5440 41 608
30 9330 73 1830 25000 418 28200 4920 42 533
 
31 9380 66 1680 24600 407 27000 --- --- ---
 
TOTAL 629130 --- 312810 361670 --- 226390 367610 --- 164395
 
YEAR 7455830 4439834


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data