LOCATION.-- Lat 39°35'00", long 88°24'48" (NAD of 1927), in NW1/4SW1/4 sec.10, T.13 N., R.7 E., Coles County, Hydrologic Unit 07140201, on right upstream side of bridge in Cooks Mills, 3.8 mi downstream from Flat Branch, and at mile 238.1. |
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DRAINAGE AREA.-- 473 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: August 1970 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1977-91. Additional chemical data for water years 1961-68, 1971-72 are published in Water-Resources Investigations 78-24 and 79-25 as site O 02. |
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SEDIMENT: January 1979 to September 1997. |
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MISCELLANEOUS: Sediment concentration and particle size, water years 1993-97. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 617.40 ft above NGVD of 1929 (617.16 ft NAVD 1988). Prior to July 30, 1981, at site 200 ft downstream at same datum. |
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REMARKS.-- Occasional golf-course irrigation water withdrawals approximately 15.5 miles upstream from the gage. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 11,000 ft3/s, May 13, 2002, gage height, 17.85 ft; no flow Sept. 11, 1988. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 1,710 mg/L, May 1, 1983; minimum daily, 0 mg/L, Sept. 10, 11, 1988. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 26,100 tons, Apr. 13, 1979; minimum daily, 0 ton, Sept. 10, 11, 1988. |
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REMARKS FOR CURRENT YEAR.-- Records poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 12 | 658 | 2870 | e310 | 364 | 461 | 478 | 322 | 150 | 78 | 18 | 14 |
2 | 13 | 858 | 3080 | 376 | 342 | 437 | 449 | 301 | 142 | 65 | 15 | 13 |
3 | 12 | 973 | 3140 | 584 | 327 | 404 | 419 | 274 | 143 | 47 | 14 | 12 |
4 | 13 | 1110 | 2720 | 1020 | 320 | 384 | 406 | 258 | 148 | 42 | 13 | 12 |
5 | 15 | 1220 | 2130 | 2650 | 336 | 379 | 394 | 245 | 142 | 39 | 13 | 11 |
6 | 15 | 1140 | 1660 | 5280 | 396 | 373 | 384 | 233 | 130 | 41 | 13 | 11 |
7 | 13 | 1010 | 2430 | 5290 | 531 | 366 | 376 | 226 | 120 | 35 | 14 | 11 |
8 | 13 | 878 | 3290 | 4490 | 848 | 366 | 369 | 226 | 114 | 31 | 14 | 9.5 |
9 | 13 | 750 | 3880 | 3110 | 1180 | 351 | 359 | 229 | 113 | 30 | 13 | 8.7 |
10 | 14 | 633 | 3630 | 2070 | 1400 | 327 | 348 | 236 | 113 | 29 | 11 | 9.0 |
11 | 15 | 577 | 2830 | 1650 | 1270 | 318 | 340 | 240 | 115 | 24 | 11 | 10 |
12 | 18 | 641 | 2090 | 1940 | 1070 | 322 | 359 | 252 | 132 | 22 | 12 | 10 |
13 | 18 | 631 | 1590 | 4010 | 979 | 314 | 519 | 334 | 147 | 22 | 14 | 10 |
14 | 16 | 563 | 1250 | 6320 | 1320 | 293 | 617 | 357 | 147 | 28 | 16 | 9.2 |
15 | 18 | 506 | 1030 | 6270 | 1810 | 270 | 590 | 341 | 278 | 41 | 17 | 9.3 |
16 | 18 | 475 | 884 | 4930 | 2150 | 258 | 510 | 306 | 439 | 44 | 23 | 17 |
17 | 19 | 456 | 781 | 3270 | 1790 | 258 | 442 | 261 | 491 | 41 | 25 | 28 |
18 | 134 | 446 | 711 | 2060 | 1380 | 265 | 412 | 229 | 439 | 41 | 21 | 41 |
19 | 692 | 463 | 653 | 1290 | 1090 | 267 | 400 | 218 | 356 | 38 | 24 | 29 |
20 | 686 | 517 | 596 | 928 | 915 | 264 | 388 | 244 | 276 | 33 | 22 | 20 |
21 | 583 | 576 | 549 | 730 | 801 | 254 | 373 | 316 | 214 | 30 | 32 | 21 |
22 | 480 | 595 | e510 | 595 | 731 | 239 | 403 | 322 | 174 | 27 | 45 | 37 |
23 | 423 | 571 | e470 | 513 | 683 | 258 | 467 | 288 | 149 | 23 | 41 | 36 |
24 | 405 | 627 | e430 | 437 | 624 | 312 | 490 | 251 | 130 | 42 | 29 | 28 |
25 | 409 | 992 | e410 | e430 | 572 | 425 | 472 | 226 | 114 | 42 | 21 | 33 |
26 | 442 | 1300 | e390 | e420 | 536 | 537 | 433 | 202 | 101 | 28 | 19 | 65 |
27 | 482 | 1810 | e370 | e418 | 501 | 690 | 403 | 188 | 91 | 23 | 19 | 131 |
28 | 532 | 2110 | e355 | e420 | 476 | 753 | 380 | 180 | 88 | 20 | 19 | 204 |
29 | 652 | 2220 | e342 | e429 | --- | 679 | 356 | 173 | 75 | 25 | 17 | 165 |
30 | 674 | 2520 | e330 | 416 | --- | 584 | 337 | 167 | 65 | 27 | 15 | 121 |
31 | 642 | --- | e320 | 390 | --- | 519 | --- | 160 | --- | 21 | 14 | --- |
TOTAL | 7491 | 27826 | 45721 | 63046 | 24742 | 11927 | 12673 | 7805 | 5336 | 1079 | 594 | 1135.7 |
MEAN | 242 | 928 | 1475 | 2034 | 884 | 385 | 422 | 252 | 178 | 34.8 | 19.2 | 37.9 |
MAX | 692 | 2520 | 3880 | 6320 | 2150 | 753 | 617 | 357 | 491 | 78 | 45 | 204 |
MIN | 12 | 446 | 320 | 310 | 320 | 239 | 337 | 160 | 65 | 20 | 11 | 8.7 |
CFSM | 0.51 | 1.96 | 3.12 | 4.30 | 1.87 | 0.81 | 0.89 | 0.53 | 0.38 | 0.07 | 0.04 | 0.08 |
IN. | 0.59 | 2.19 | 3.60 | 4.96 | 1.95 | 0.94 | 1.00 | 0.61 | 0.42 | 0.08 | 0.05 | 0.09 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1971 - 2005, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 172 | 329 | 536 | 514 | 629 | 737 | 718 | 790 | 518 | 275 | 163 | 99.4 |
MAX | 1189 | 2205 | 1626 | 2034 | 2028 | 2565 | 2116 | 2881 | 1864 | 1166 | 952 | 817 |
(WY) | 1994 | 1993 | 1988 | 2005 | 1982 | 1979 | 1994 | 2002 | 1974 | 1973 | 1981 | 1993 |
MIN | 12.7 | 22.2 | 16.7 | 14.2 | 43.8 | 101 | 56.0 | 103 | 48.0 | 16.8 | 14.9 | 10.4 |
(WY) | 1985 | 2003 | 1977 | 1977 | 2003 | 2003 | 2003 | 1976 | 1988 | 1988 | 1988 | 1999 |
SUMMARY STATISTICS | FOR 2004 CALENDAR YEAR | FOR 2005 WATER YEAR | WATER YEARS 1971 - 2005 | |||
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ANNUAL TOTAL | 208575 | 209375.7 | ||||
ANNUAL MEAN | 570 | 574 | 456 | |||
HIGHEST ANNUAL MEAN | 838 | 1973 | ||||
LOWEST ANNUAL MEAN | 132 | 2003 | ||||
HIGHEST DAILY MEAN | 4260 | Mar 29 | 6320 | Jan 14 | 10700 | May 13 2002 |
LOWEST DAILY MEAN | 12 | Oct 1 | 8.7 | Sep 9 | 0.00 | Sep 11 1988 |
ANNUAL SEVEN-DAY MINIMUM | 13 | Sep 29 | 9.5 | Sep 9 | 2.7 | Sep 8 1988 |
MAXIMUM PEAK FLOW | 6510 | Jan 15 | 11000 | May 13 2002 | ||
MAXIMUM PEAK STAGE | 15.93 | Jan 15 | 17.85 | May 13 2002 | ||
INSTANTANEOUS LOW FLOW | 8.3 | A | 0.00 | Sep 11 1988 | ||
ANNUAL RUNOFF (CFSM) | 1.20 | 1.21 | 0.964 | |||
ANNUAL RUNOFF (INCHES) | 16.40 | 16.47 | 13.10 | |||
10 PERCENT EXCEEDS | 1260 | 1340 | 1210 | |||
50 PERCENT EXCEEDS | 290 | 327 | 176 | |||
90 PERCENT EXCEEDS | 28 | 15 | 20 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |