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. 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 fair except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 12 | 39 | 17 | 41 | e10 | e50 | 58 | 43 | 154 | 108 | 47 | 695 |
2 | 12 | 32 | 16 | 60 | e11 | e52 | 51 | 40 | 166 | 139 | 41 | 919 |
3 | 9.7 | 26 | 15 | 48 | e11 | e49 | 53 | 46 | 168 | 131 | 38 | 804 |
4 | 9.1 | 23 | 14 | 35 | e12 | 47 | 56 | 46 | 159 | 112 | 37 | 735 |
5 | 10 | 22 | 17 | 27 | e14 | 47 | 61 | 130 | 150 | 98 | 60 | 512 |
6 | 14 | 22 | 17 | 25 | e19 | 48 | 80 | 286 | 136 | 84 | 47 | 246 |
7 | 25 | 24 | 15 | 28 | e24 | 66 | 73 | 396 | 123 | 73 | 37 | 142 |
8 | 21 | 34 | 15 | 24 | e26 | 73 | 63 | 463 | 120 | 70 | 33 | 102 |
9 | 16 | 36 | 14 | 22 | e24 | 62 | 74 | 509 | 120 | 67 | 30 | 79 |
10 | 15 | 34 | 14 | 21 | 25 | 71 | 73 | 679 | 112 | 373 | 29 | 65 |
11 | 13 | 29 | 13 | 25 | 26 | 68 | 64 | 1440 | 105 | 737 | 28 | 54 |
12 | 12 | 27 | 14 | 19 | 27 | 60 | 60 | 2020 | 105 | 1280 | 26 | 46 |
13 | 11 | 25 | 14 | 16 | 26 | 70 | 58 | 1760 | 252 | 1700 | 25 | 42 |
14 | 10 | 22 | 14 | e15 | 25 | 120 | 55 | 1280 | 643 | 1400 | 23 | 37 |
15 | 10 | 19 | 15 | e14 | e28 | 262 | 51 | 920 | 800 | 967 | 22 | 34 |
16 | 14 | 16 | 15 | e14 | e35 | 259 | 48 | 702 | 819 | 602 | 21 | 33 |
17 | 13 | 13 | 14 | e13 | e34 | 214 | 47 | 656 | 716 | 309 | 23 | 32 |
18 | 10 | 13 | 13 | e12 | e32 | 176 | 47 | 634 | 544 | 205 | 20 | 29 |
19 | 9.9 | 15 | 16 | e12 | e31 | 150 | 52 | 542 | 392 | 171 | 19 | 26 |
20 | 13 | 16 | 33 | e11 | e34 | 137 | 53 | 461 | 326 | 180 | 18 | 25 |
21 | 35 | 17 | 53 | e10 | e47 | 140 | 49 | 401 | 277 | 182 | 17 | 25 |
22 | 36 | 18 | 39 | e10 | e70 | 134 | 49 | 384 | 226 | 181 | 17 | 26 |
23 | 24 | 18 | 27 | e10 | e100 | 118 | 50 | 346 | 195 | 231 | 16 | 25 |
24 | 20 | 20 | 22 | e9.9 | e170 | 102 | 46 | 294 | 174 | 187 | 17 | 26 |
25 | 19 | 21 | 21 | e9.8 | e130 | 90 | 45 | 258 | 152 | 133 | 17 | 29 |
26 | 18 | 17 | 18 | e9.8 | e100 | 86 | 48 | 231 | 141 | 101 | 16 | 27 |
27 | 24 | 16 | 17 | e9.9 | e74 | 81 | 60 | 207 | 131 | 81 | 16 | 52 |
28 | 32 | 16 | 17 | e10 | e60 | 75 | 58 | 187 | 122 | 69 | 15 | 75 |
29 | 28 | 18 | 19 | e10 | --- | 72 | 50 | 175 | 112 | 61 | 17 | 99 |
30 | 25 | 18 | 19 | e10 | --- | 72 | 47 | 168 | 101 | 57 | 18 | 77 |
31 | 28 | --- | 25 | e10 | --- | 71 | --- | 160 | --- | 54 | 29 | --- |
TOTAL | 548.7 | 666 | 592 | 591.4 | 1225 | 3122 | 1679 | 15864 | 7741 | 10143 | 819 | 5118 |
MEAN | 17.7 | 22.2 | 19.1 | 19.1 | 43.8 | 101 | 56.0 | 512 | 258 | 327 | 26.4 | 171 |
MAX | 36 | 39 | 53 | 60 | 170 | 262 | 80 | 2020 | 819 | 1700 | 60 | 919 |
MIN | 9.1 | 13 | 13 | 9.8 | 10 | 47 | 45 | 40 | 101 | 54 | 15 | 25 |
CFSM | 0.04 | 0.05 | 0.04 | 0.04 | 0.09 | 0.21 | 0.12 | 1.08 | 0.55 | 0.69 | 0.06 | 0.36 |
IN. | 0.04 | 0.05 | 0.05 | 0.05 | 0.10 | 0.25 | 0.13 | 1.25 | 0.61 | 0.80 | 0.06 | 0.40 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1971 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 174 | 306 | 508 | 454 | 635 | 742 | 727 | 815 | 531 | 281 | 171 | 103 |
MAX | 1189 | 2205 | 1626 | 1862 | 2028 | 2565 | 2116 | 2881 | 1864 | 1166 | 952 | 817 |
(WY) | 1994 | 1993 | 1988 | 1974 | 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 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1971 - 2003 | |||
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ANNUAL TOTAL | 220444.7 | 48109.1 | ||||
ANNUAL MEAN | 604 | 132 | 453 | |||
HIGHEST ANNUAL MEAN | 838 | 1973 | ||||
LOWEST ANNUAL MEAN | 132 | 2003 | ||||
HIGHEST DAILY MEAN | 10700 | May 13 | 2020 | May 12 | 10700 | May 13 2002 |
LOWEST DAILY MEAN | 9.1 | Oct 4 | 9.1 | Oct 4 | 0.00 | Sep 11 1988 |
ANNUAL SEVEN-DAY MINIMUM | 11 | Sep 29 | 9.9 A | Jan 21 | 2.7 | Sep 8 1988 |
MAXIMUM PEAK FLOW | 2060 | May 12 | 11000 | May 13 2002 | ||
MAXIMUM PEAK STAGE | 10.71 | May 12 | 17.85 | May 13 2002 | ||
INSTANTANEOUS LOW FLOW | 7.8 | Oct 19 | ||||
ANNUAL RUNOFF (CFSM) | 1.28 | 0.28 | 0.96 | |||
ANNUAL RUNOFF (INCHES) | 17.34 | 3.78 | 13.01 | |||
10 PERCENT EXCEEDS | 1670 | 316 | 1210 | |||
50 PERCENT EXCEEDS | 112 | 42 | 171 | |||
90 PERCENT EXCEEDS | 14 | 13 | 19 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |