Station list     Available data
LOWER MISSISSIPPI RIVER BASIN


07022000                         MISSISSIPPI RIVER AT THEBES, IL



LOCATION.--Lat 37°13'00", long 89°27'50", in NW 1/4 sec.17, T.15 S., R.3 W., Alexander County, Hydrologic Unit 07140105, near center span on downstream side of railroad bridge at Thebes, 5.0 mi downstream from Headwater Diversion Channel, and at mile 43.7 above Ohio River.

DRAINAGE AREA.--713,200 mi2, approximately.

PERIOD OF RECORD.--January 1973 to current year.

PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: October 1974 to September 1981.
WATER TEMPERATURE: October 1974 to September 1981.
SUSPENDED-SEDIMENT: October 1980 to current year.

REMARKS.--NASQAN station January 1973 to September 1986. Illinois Environmental Protection Agency station October 1986 to September 1994 (during the period, samples were analyzed by the Illinois EPA). Re-established as a NASQAN station October 1994 to current year. Sediment records good except for estimated daily load Jan. 2-17, which are fair.

EXTREMES FOR PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Maximum daily, 705 microsiemens per centimeter, Aug. 5-7, 1980; minimum daily, 272 microsiemens per centimeter, Apr. 6, 1979.
WATER TEMPERATURE: Maximum daily, 31.5 °C, July 10 and 11, 1975, and July 17, 1977; minimum daily, 0.0 °C, on several days during winter periods.
SUSPENDED-SEDIMENT CONCENTRATONS: Maximum daily mean, 3,890 mg/L, Dec. 22, 1985; minimum daily mean, 13 mg/L, Jan. 28, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 6,280,000 tons, Mar. 1, 1985; minimum daily, 2,530 tons, Jan. 28, 1981.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,490 mg/L, April 20; minimum daily mean, 112 mg/L, Sept. 5.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 1,940,000 tons, Apr. 21; minimum daily, 39,600 tons, Sept. 23.
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 151000 167 67600 211000 191 108000 210000 220 125000
2 149000 168 67600 208000 174 97900 202000 215 117000
3 152000 160 65500 212000 174 99800 194000 185 97100
4 160000 149 64500 253000 248 173000 209000 196 111000
5 171000 148 68400 328000 468 420000 222000 192 115000
 
6 175000 142 67200 378000 738 757000 218000 206 121000
7 214000 215 131000 395000 1100 1170000 210000 248 141000
8 348000 589 570000 385000 1140 1190000 205000 209 116000
9 404000 1300 1420000 361000 1020 990000 227000 191 118000
10 413000 1430 1590000 333000 828 744000 262000 242 172000
 
11 399000 1170 1260000 320000 718 621000 274000 342 253000
12 372000 1000 1010000 338000 644 588000 253000 462 315000
13 334000 836 754000 359000 698 677000 237000 444 284000
14 292000 685 539000 366000 667 659000 225000 312 190000
15 257000 529 367000 360000 661 643000 213000 249 144000
 
16 231000 419 262000 342000 655 604000 204000 207 114000
17 217000 334 196000 319000 688 591000 193000 191 99200
18 212000 285 163000 299000 652 526000 188000 200 102000
19 219000 274 163000 286000 524 404000 184000 172 85500
20 266000 309 225000 279000 419 316000 181000 170 83200
 
21 326000 510 452000 270000 383 280000 181000 196 95700
22 356000 750 722000 259000 331 231000 182000 196 96200
23 358000 940 908000 247000 292 195000 175000 192 91100
24 334000 838 756000 243000 250 164000 168000 189 85200
25 303000 686 561000 235000 225 143000 166000 184 82400
 
26 275000 600 445000 230000 218 136000 158000 205 86700
27 251000 495 335000 230000 224 139000 140000 274 104000
28 229000 371 230000 224000 228 138000 129000 235 81900
29 220000 281 167000 221000 200 119000 131000 206 72800
30 213000 218 125000 216000 183 107000 128000 187 64900
 
31 211000 210 120000 --- --- --- 124000 191 63900
 
JANUARY FEBRUARY MARCH
1 115000 191 59400 331000 327 294000 214000 138 79600
2 115000 --- 62700 363000 382 375000 208000 138 77400
3 119000 --- 74800 386000 513 535000 202000 134 73400
4 113000 --- 66400 379000 508 519000 206000 143 79600
5 111000 --- 60200 353000 481 458000 212000 137 78400
 
6 112000 --- 58900 337000 408 372000 220000 162 96500
7 114000 --- 59400 354000 389 374000 226000 203 124000
8 121000 --- 68700 409000 505 559000 227000 188 115000
9 120000 --- 68100 444000 560 671000 228000 212 131000
10 112000 --- 59000 456000 533 656000 250000 242 164000
 
11 108000 --- 53300 438000 446 528000 294000 262 210000
12 109000 --- 56000 410000 424 468000 323000 396 346000
13 112000 --- 60700 379000 397 407000 319000 483 416000
14 119000 --- 68000 358000 344 332000 303000 399 326000
15 121000 --- 70800 348000 318 299000 291000 322 252000
 
16 121000 --- 67100 337000 266 242000 275000 261 193000
17 129000 --- 85800 319000 234 201000 267000 220 159000
18 146000 344 136000 300000 227 183000 259000 204 143000
19 163000 384 169000 290000 248 194000 253000 174 119000
20 170000 332 152000 285000 261 201000 255000 173 119000
 
21 176000 296 141000 283000 255 194000 264000 178 127000
22 206000 993 553000 271000 249 182000 258000 138 96000
23 216000 645 376000 254000 236 162000 241000 141 91800
24 272000 493 366000 240000 200 129000 232000 173 108000
25 326000 611 539000 236000 165 105000 237000 196 125000
 
26 336000 538 487000 227000 136 83600 243000 183 120000
27 323000 632 552000 217000 131 76500 238000 181 116000
28 311000 564 474000 213000 134 77000 227000 174 107000
29 295000 502 400000 --- --- --- 220000 162 96600
30 288000 446 347000 --- --- --- 212000 137 78300
 
31 299000 328 265000 --- --- --- 198000 139 73900
 
APRIL MAY JUNE
1 188000 169 86000 535000 750 1080000 483000 579 755000
2 183000 170 83800 546000 879 1300000 483000 530 690000
3 183000 149 74000 557000 948 1430000 480000 455 590000
4 228000 257 159000 562000 909 1380000 473000 390 498000
5 238000 344 221000 558000 620 933000 473000 377 482000
 
6 229000 207 128000 549000 567 839000 475000 418 536000
7 226000 179 109000 552000 564 840000 475000 486 623000
8 230000 185 114000 568000 589 904000 473000 504 644000
9 235000 182 116000 588000 629 999000 465000 522 656000
10 250000 206 140000 595000 653 1050000 455000 467 574000
 
11 289000 231 181000 588000 524 832000 440000 471 559000
12 307000 357 296000 561000 471 714000 428000 495 572000
13 299000 490 394000 525000 432 612000 417000 449 506000
14 293000 602 476000 491000 417 552000 414000 463 517000
15 307000 655 543000 449000 421 509000 408000 587 647000
 
16 314000 598 507000 433000 456 533000 404000 610 664000
17 331000 580 519000 432000 436 508000 406000 567 622000
18 384000 696 728000 438000 570 673000 409000 603 666000
19 434000 1080 1270000 443000 584 698000 407000 575 631000
20 469000 1490 1890000 449000 618 749000 403000 596 649000
 
21 488000 1470 1940000 462000 618 772000 394000 670 713000
22 497000 1320 1770000 477000 666 858000 384000 619 641000
23 502000 1090 1480000 488000 756 997000 378000 570 582000
24 495000 897 1200000 491000 753 998000 388000 470 493000
25 481000 798 1040000 488000 873 1150000 386000 401 417000
 
26 473000 696 889000 489000 903 1190000 369000 365 364000
27 482000 700 913000 494000 956 1280000 361000 346 336000
28 496000 789 1060000 500000 1110 1500000 358000 417 403000
29 512000 860 1190000 499000 1110 1500000 345000 438 408000
30 527000 811 1150000 498000 838 1130000 334000 455 410000
 
31 --- --- --- 493000 647 860000 --- --- ---
 
JULY AUGUST SEPTEMBER
1 334000 448 404000 256000 267 184000 159000 132 56700
2 359000 554 540000 260000 285 200000 155000 124 51900
3 394000 850 908000 264000 286 204000 150000 115 46400
4 420000 1140 1290000 262000 289 204000 147000 118 46600
5 418000 1150 1300000 256000 273 188000 145000 112 43800
 
6 405000 1010 1110000 246000 246 164000 142000 116 44400
7 383000 924 955000 236000 219 140000 141000 125 47700
8 360000 781 758000 230000 201 125000 137000 116 42800
9 341000 779 716000 230000 216 134000 130000 137 48000
10 324000 768 672000 228000 223 138000 131000 131 46400
 
11 316000 638 544000 222000 213 128000 131000 122 43000
12 314000 616 522000 214000 202 116000 125000 117 39600
13 309000 643 536000 215000 199 115000 123000 130 43300
14 300000 574 466000 225000 269 163000 120000 138 44500
15 293000 512 405000 218000 310 183000 119000 135 43400
 
16 287000 509 394000 203000 350 192000 120000 128 41500
17 275000 451 334000 192000 442 228000 121000 132 43000
18 266000 389 280000 183000 386 190000 122000 144 47300
19 259000 378 264000 179000 320 154000 123000 146 48700
20 257000 415 288000 172000 269 125000 122000 137 45400
 
21 251000 345 234000 165000 221 98200 124000 127 42400
22 246000 305 202000 155000 185 77300 120000 129 41900
23 243000 273 179000 153000 165 68100 120000 122 39600
24 239000 237 153000 152000 151 62000 119000 129 41300
25 233000 219 138000 155000 152 63300 117000 136 43000
 
26 230000 197 122000 159000 160 68400 116000 150 46800
27 233000 190 120000 161000 154 67000 114000 152 46900
28 238000 199 128000 163000 141 62200 112000 152 46200
29 242000 209 137000 163000 129 56800 113000 147 44800
30 248000 242 163000 165000 127 56800 119000 133 40900


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data