Station list     Available data
LOWER MISSISSIPPI RIVER BASIN


07020500                         MISSISSIPPI RIVER AT CHESTER, IL



LOCATION.--Lat 37°54'10", long 89°51'10", 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.--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, 2,120 mg/L, June 20; minimum daily mean, 104 mg/L, Oct. 9.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 2,400,000 tons, June 20; minimum daily, 32,100 tons, Sept. 15.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
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 127 49900 173000 179 83800 163000 214 94300
2 139000 126 47300 175000 187 88400 166000 207 92800
3 139000 119 44600 173000 184 85800 170000 205 93900
4 138000 111 41500 168000 174 79200 184000 245 122000
5 136000 114 42000 164000 172 76500 173000 330 154000
 
6 137000 122 45100 170000 188 86600 175000 428 202000
7 138000 114 42600 173000 186 86700 177000 407 194000
8 136000 109 39900 167000 162 72900 181000 369 180000
9 136000 104 38100 164000 157 69400 179000 334 161000
10 136000 126 46200 160000 160 69500 179000 300 145000
 
11 132000 106 37900 158000 182 77800 175000 256 120000
12 133000 114 40900 157000 157 66600 167000 215 96600
13 132000 117 41700 157000 157 66500 164000 191 84300
14 136000 118 43400 154000 163 67900 162000 189 82800
15 135000 118 42800 153000 159 65700 158000 189 80300
 
16 136000 128 47000 151000 153 62400 152000 177 72900
17 154000 141 58800 149000 150 60500 147000 190 75300
18 168000 142 64300 148000 172 68800 147000 237 94100
19 167000 147 66300 149000 170 68600 146000 170 66900
20 166000 179 80300 148000 149 59500 139000 152 57100
 
21 165000 158 70400 147000 143 57000 140000 159 60100
22 166000 143 63900 150000 146 59000 147000 182 72100
23 164000 138 61000 146000 149 58800 148000 203 81400
24 165000 143 63400 144000 152 59300 149000 183 73300
25 165000 144 64100 143000 150 57600 157000 171 72400
 
26 163000 143 63000 138000 147 54500 164000 175 77400
27 162000 142 62200 131000 139 49200 169000 208 95000
28 160000 129 55600 127000 134 46200 174000 230 108000
29 156000 118 49400 137000 156 57900 174000 243 114000
30 160000 131 56500 149000 186 74900 173000 219 102000
 
31 168000 145 65800 --- --- --- 162000 193 84300
 
JANUARY FEBRUARY MARCH
1 149000 186 75100 152000 146 59700 317000 436 374000
2 145000 182 71500 154000 141 58500 297000 419 335000
3 145000 168 65600 151000 152 62200 277000 367 274000
4 142000 154 59000 146000 149 58600 264000 345 246000
5 154000 154 64400 150000 141 57300 260000 290 204000
 
6 180000 187 91800 167000 166 75200 256000 233 161000
7 205000 255 142000 183000 182 89900 251000 212 144000
8 250000 361 248000 181000 196 95300 250000 214 145000
9 321000 632 553000 173000 210 98000 272000 318 235000
10 331000 715 639000 166000 194 87000 332000 489 432000
 
11 302000 558 455000 160000 173 74600 391000 644 673000
12 260000 424 298000 169000 201 92900 407000 803 883000
13 225000 385 234000 233000 353 227000 392000 845 893000
14 196000 291 154000 276000 506 377000 364000 659 649000
15 182000 233 115000 269000 463 336000 334000 524 472000
 
16 174000 229 107000 244000 394 260000 310000 423 354000
17 165000 220 98200 235000 343 217000 289000 348 271000
18 165000 208 92800 241000 313 204000 310000 362 304000
19 165000 189 84000 252000 306 209000 362000 418 411000
20 155000 157 65800 264000 315 225000 434000 599 707000
 
21 151000 145 59300 260000 289 203000 481000 884 1150000
22 153000 151 62300 257000 270 188000 506000 1230 1690000
23 155000 160 67000 250000 252 170000 510000 1150 1590000
24 156000 167 70400 245000 216 143000 498000 986 1330000
25 158000 154 65300 239000 205 132000 474000 922 1180000
 
26 154000 140 58200 233000 202 127000 447000 883 1060000
27 152000 138 56500 243000 260 172000 418000 847 954000
28 145000 138 54000 287000 355 278000 403000 806 877000
29 144000 153 59700 --- --- --- 388000 741 776000
30 148000 134 53400 --- --- --- 380000 687 705000
 
31 148000 150 59900 --- --- --- 377000 747 761000
 
APRIL MAY JUNE
1 381000 842 867000 435000 662 778000 254000 498 341000
2 410000 867 961000 453000 793 972000 244000 459 303000
3 456000 951 1170000 467000 862 1090000 246000 373 248000
4 492000 1070 1420000 464000 612 767000 255000 369 255000
5 516000 1200 1680000 450000 527 640000 277000 390 291000
 
6 532000 1320 1900000 428000 405 468000 292000 462 366000
7 540000 1280 1870000 400000 363 392000 306000 877 723000
8 537000 1120 1620000 373000 369 371000 285000 718 557000
9 523000 1080 1520000 356000 324 311000 266000 520 373000
10 504000 1070 1450000 345000 345 321000 269000 440 320000
 
11 488000 872 1150000 338000 321 294000 290000 664 520000
12 487000 801 1060000 333000 304 273000 310000 605 507000
13 500000 763 1030000 324000 304 266000 319000 569 490000
14 511000 730 1010000 316000 297 253000 320000 565 488000
15 515000 726 1010000 311000 260 218000 343000 600 563000
 
16 535000 645 932000 306000 231 191000 363000 1190 1170000
17 555000 778 1170000 296000 256 204000 372000 1340 1350000
18 571000 893 1380000 280000 234 176000 391000 1480 1560000
19 570000 727 1120000 260000 256 179000 410000 1740 1920000
20 561000 717 1090000 248000 255 171000 419000 2120 2400000
 
21 545000 725 1070000 253000 244 167000 426000 2080 2390000
22 524000 651 921000 264000 235 168000 440000 1710 2030000
23 504000 566 769000 281000 238 180000 463000 1380 1720000
24 483000 515 672000 294000 291 231000 483000 1120 1460000
25 463000 538 672000 288000 300 234000 490000 955 1260000
 
26 448000 582 702000 290000 342 269000 487000 1050 1380000
27 433000 623 728000 307000 370 307000 476000 933 1200000
28 418000 582 657000 317000 396 339000 456000 798 983000
29 410000 566 627000 307000 448 371000 429000 684 792000
30 417000 566 638000 288000 473 367000 410000 585 647000
 
31 --- --- --- 273000 487 359000 --- --- ---
 
JULY AUGUST SEPTEMBER
1 398000 503 541000 353000 1110 1060000 178000 222 107000
2 402000 468 508000 323000 941 821000 179000 249 120000
3 420000 600 682000 303000 789 646000 165000 231 103000
4 439000 834 990000 277000 783 583000 143000 213 82000
5 436000 977 1150000 252000 750 511000 130000 204 71800
 
6 423000 933 1070000 254000 703 482000 129000 197 68700
7 423000 942 1080000 258000 589 410000 129000 190 66000
8 435000 1020 1200000 247000 484 323000 126000 180 61000
9 442000 996 1190000 241000 405 264000 119000 172 54900
10 444000 937 1120000 243000 365 240000 111000 153 45700
 
11 450000 906 1100000 239000 356 229000 109000 172 50700
12 450000 883 1070000 233000 355 223000 110000 161 47900
13 446000 872 1050000 230000 354 219000 107000 143 41200
14 437000 984 1160000 225000 332 202000 102000 127 35000
15 425000 864 992000 215000 309 180000 104000 114 32100
 
16 407000 721 793000 212000 284 162000 115000 136 42400
17 383000 729 753000 208000 263 148000 165000 269 127000
18 355000 766 732000 189000 287 146000 238000 761 494000
19 321000 720 624000 180000 391 190000 226000 902 549000
20 289000 646 503000 185000 278 139000 195000 648 341000
 
21 270000 552 401000 188000 225 114000 175000 473 224000
22 257000 498 345000 178000 226 109000 161000 373 162000
23 249000 470 316000 169000 208 94600 148000 286 115000
24 239000 480 309000 155000 185 77100 141000 225 85700
25 235000 452 287000 147000 154 61200 140000 182 68900
 
26 233000 413 260000 149000 162 65000 150000 176 71200
27 230000 377 234000 152000 151 62000 154000 178 74100
28 239000 455 299000 152000 155 63500 157000 168 71500
29 301000 1080 883000 156000 165 69800 156000 159 67000
30 333000 1180 1060000 163000 178 78200 150000 163 66200
 
31 356000 1140 1100000 170000 192 88100 --- --- ---


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data