Station list     Available data
LOWER MISSISSIPPI RIVER BASIN


07020500                         MISSISSIPPI RIVER AT CHESTER, IL



LOCATION.--Lat 37°54'10", long 89°50'10", in SW 1/4 sec.24, T.7 S., R.7 W., third principal meridian, Randolph County, Hydrologic Unit 07140105, on downstream side of left pier of main truss of highway bridge at Chester, 8.1 mi downstream from Kaskaskia River, and at mile 109.9 above Ohio River.

DRAINAGE AREA.--708,600 mi2, approximately.

PERIOD OF DAILY RECORD.--
SUSPENDED-SEDIMENT: August 1980 to current year.

REMARKS.--Estimated daily load: Jan. 1-18, 21-24, and June 19-27. Sediment records fair.

EXTREMES FOR PERIOD OF DAILY RECORD.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,380 mg/L, Apr. 13, 1987; minimum daily mean, 13 mg/L, Mar. 18, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,330,000 tons, Feb. 25, 1997; minimum daily, 3,580 tons, Mar. 18, 1981.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,880 mg/L, Oct. 9; minimum daily mean, 113 mg/L, Sept. 9.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 2,050,000 tons, Oct. 9; minimum daily, 36,300 tons, Sept. 28.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
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 146000 165 65100 203000 288 158000 208000 217 122000
2 148000 164 65400 202000 291 159000 195000 209 110000
3 151000 149 61100 224000 383 234000 202000 237 130000
4 163000 144 63500 297000 755 619000 219000 235 139000
5 162000 144 62900 373000 1070 1080000 219000 247 146000
 
6 168000 162 74300 404000 1360 1480000 210000 249 141000
7 282000 516 427000 400000 1320 1420000 201000 246 134000
8 382000 1560 1630000 377000 1180 1210000 211000 230 132000
9 405000 1880 2050000 346000 1060 993000 247000 300 202000
10 394000 1480 1570000 319000 958 825000 275000 482 358000
 
11 372000 1230 1230000 325000 901 792000 258000 476 332000
12 335000 1020 921000 356000 977 942000 234000 335 211000
13 286000 846 652000 370000 878 878000 223000 294 177000
14 241000 683 445000 369000 986 983000 209000 268 152000
15 211000 522 298000 356000 906 870000 200000 220 119000
 
16 193000 410 214000 330000 794 706000 188000 211 107000
17 186000 331 166000 304000 728 597000 182000 213 105000
18 188000 270 137000 285000 638 491000 181000 209 102000
19 221000 314 191000 277000 543 406000 176000 202 96400
20 290000 624 498000 270000 415 302000 176000 197 93500
 
21 344000 1040 973000 259000 400 279000 173000 191 89200
22 367000 1030 1020000 246000 362 240000 171000 185 85500
23 357000 1020 985000 240000 320 207000 163000 181 79400
24 325000 998 875000 235000 298 189000 161000 183 79200
25 288000 791 615000 228000 259 159000 157000 185 78300
 
26 256000 534 370000 230000 239 148000 138000 185 69000
27 231000 364 226000 225000 233 141000 123000 168 56000
28 216000 322 188000 222000 276 165000 126000 176 60100
29 209000 299 169000 219000 261 154000 126000 182 61800
30 205000 292 162000 213000 247 142000 122000 181 59500
 
31 206000 290 161000 --- --- --- 115000 179 55500
 
JANUARY FEBRUARY MARCH
1 106000 --- 49000 310000 559 469000 206000 163 90700
2 108000 --- 49400 342000 826 766000 195000 174 91500
3 107000 --- 49100 351000 857 812000 195000 195 102000
4 107000 --- 49000 335000 787 711000 199000 217 117000
5 110000 --- 50700 316000 656 560000 203000 235 129000
 
6 110000 --- 50800 307000 533 441000 211000 252 144000
7 119000 --- 63000 340000 537 498000 213000 263 151000
8 121000 --- 64100 393000 688 733000 210000 235 133000
9 115000 --- 58800 423000 697 797000 214000 250 145000
10 109000 --- 53100 415000 746 836000 245000 357 242000
 
11 107000 --- 52200 390000 628 661000 292000 497 393000
12 107000 --- 52200 362000 488 476000 302000 608 495000
13 111000 --- 54200 337000 389 354000 286000 560 433000
14 115000 --- 58300 326000 359 316000 273000 479 353000
15 114000 --- 60200 320000 340 293000 262000 403 285000
 
16 122000 --- 71900 306000 322 266000 241000 280 182000
17 136000 --- 106000 288000 316 246000 233000 229 144000
18 157000 --- 157000 275000 329 244000 231000 234 146000
19 165000 330 147000 269000 334 243000 228000 258 159000
20 170000 292 134000 270000 313 229000 239000 251 162000
 
21 172000 --- 131000 265000 289 206000 244000 234 154000
22 179000 --- 136000 252000 267 181000 233000 219 138000
23 212000 --- 182000 235000 257 163000 218000 231 136000
24 289000 --- 355000 229000 251 155000 219000 274 162000
25 313000 645 544000 226000 262 160000 231000 262 164000
 
26 304000 757 620000 214000 272 157000 233000 243 153000
27 290000 710 555000 208000 216 121000 224000 208 125000
28 278000 606 454000 211000 184 105000 216000 209 122000
29 268000 533 386000 --- --- --- 214000 212 122000
30 266000 476 342000 --- --- --- 201000 170 92600
 
31 280000 481 364000 --- --- --- 188000 173 87900
 
APRIL MAY JUNE
1 185000 162 80800 529000 812 1160000 459000 562 696000
2 178000 143 68400 540000 851 1240000 454000 489 600000
3 184000 142 71300 545000 869 1280000 450000 407 494000
4 211000 187 107000 536000 761 1100000 449000 397 481000
5 209000 160 90800 521000 662 931000 453000 388 474000
 
6 201000 128 69800 515000 653 909000 454000 453 556000
7 207000 160 89800 527000 676 963000 449000 544 660000
8 211000 193 110000 543000 666 976000 442000 569 678000
9 224000 224 136000 551000 638 949000 435000 573 673000
10 252000 263 180000 543000 603 883000 422000 574 654000
 
11 294000 376 300000 514000 521 723000 410000 574 635000
12 295000 553 439000 477000 519 668000 401000 594 643000
13 282000 581 443000 448000 428 518000 397000 622 666000
14 284000 517 396000 418000 388 437000 395000 652 695000
15 293000 454 360000 399000 378 408000 390000 690 726000
 
16 304000 418 343000 400000 384 415000 391000 642 677000
17 354000 512 494000 409000 440 486000 395000 632 674000
18 426000 813 943000 419000 508 574000 398000 562 604000
19 472000 1240 1590000 430000 560 650000 396000 --- 548000
20 495000 1290 1730000 447000 661 799000 388000 --- 504000
 
21 507000 1120 1540000 464000 664 833000 379000 --- 463000
22 509000 956 1310000 477000 733 945000 371000 --- 426000
23 501000 835 1130000 482000 852 1110000 366000 --- 399000
24 484000 735 961000 478000 981 1260000 367000 --- 407000
25 471000 657 834000 475000 923 1180000 363000 --- 413000
 
26 475000 602 771000 478000 884 1140000 357000 --- 417000
27 489000 657 869000 481000 1090 1420000 356000 --- 427000
28 502000 748 1020000 479000 1040 1350000 347000 457 427000
29 515000 782 1090000 476000 857 1100000 331000 477 426000
30 520000 759 1070000 470000 740 939000 324000 424 371000
 
31 --- --- --- 464000 645 809000 --- --- ---
 
JULY AUGUST SEPTEMBER
1 341000 566 523000 257000 279 193000 152000 122 50100
2 381000 792 818000 262000 292 207000 148000 121 48500
3 410000 986 1090000 264000 289 206000 143000 123 47400
4 422000 1160 1320000 259000 281 196000 143000 124 48000
5 413000 1100 1230000 248000 274 183000 139000 126 47100
 
6 389000 1000 1050000 238000 267 171000 138000 127 47300
7 361000 851 828000 228000 261 161000 137000 128 47500
8 341000 810 745000 227000 263 161000 127000 118 40500
9 322000 775 674000 226000 265 161000 129000 113 39500
10 311000 744 625000 222000 256 154000 130000 139 48500
 
11 311000 722 607000 215000 224 130000 124000 135 45400
12 309000 694 579000 208000 208 117000 122000 126 41400
13 300000 590 478000 220000 306 182000 119000 118 37800
14 288000 518 403000 223000 547 328000 117000 123 38900
15 285000 509 392000 208000 542 304000 119000 130 41600
 
16 277000 512 383000 191000 518 267000 120000 142 46000
17 268000 510 369000 182000 417 205000 121000 145 47400
18 262000 509 360000 178000 318 153000 122000 145 47800
19 255000 518 357000 173000 251 117000 123000 134 44400
20 251000 524 355000 166000 216 96800 123000 127 42100
 
21 243000 394 259000 154000 198 82200 121000 132 43000
22 241000 339 220000 151000 177 72000 119000 134 43000
23 238000 327 210000 150000 160 65000 120000 142 45800
24 233000 290 182000 151000 162 66200 117000 145 45800
25 227000 255 156000 155000 158 66300 116000 138 43000
 
26 229000 253 157000 158000 151 64600 115000 128 39900
27 234000 223 141000 160000 145 62600 113000 120 36500
28 238000 259 166000 161000 142 61300 113000 119 36300
29 243000 254 167000 161000 138 59800 116000 133 41600
30 249000 253 171000 163000 133 58400 133000 148 53000
 
31 252000 266 181000 157000 124 52500 --- --- ---


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data