LOCATION.-- Lat 39°08'56", long 89°21'08" (NAD of 1927), in NW1/4SE1/4 sec.7, T.8 N., R.2 W., Montgomery County, Hydrologic Unit 07140203, on right bank at downstream side of bridge on County Highway 8, 4.5 mi northeast of Coffeen, 6.5 mi east of Hillsboro, and at mile 39.3. |
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DRAINAGE AREA.-- 55.5 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1963 to current year. |
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STAGE: Water years 1994-2002. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, rain gage, and crest-stage gage. Datum of gage is 574.76 ft above NGVD of 1929. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 5,910 ft3/s, Dec. 7, 1966, from rating curve extended above 2,200 ft3/s, gage height, 14.45 ft; maximum gage height, 14.75 ft, Aug. 5, 1998, discharge, 5,030 ft3/s; no flow for many days in most years. |
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REMARKS FOR CURRENT YEAR.-- Records poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 0.10 | 7.4 | 77 | e6.0 | 771 | e20 | 52 | 273 | 47 | 1.5 | 0.24 | 0.10 |
2 | 0.10 | 6.7 | 33 | e5.5 | 87 | 204 | 40 | 201 | 41 | 1.2 | 0.22 | 0.08 |
3 | 0.09 | 6.2 | 23 | e5.0 | 51 | 158 | 30 | 72 | 37 | 1.0 | 0.24 | 0.08 |
4 | 0.07 | 6.0 | 18 | e5.0 | 40 | 44 | 25 | 48 | 33 | 0.83 | 0.24 | 0.09 |
5 | 0.45 | 5.6 | 15 | e5.2 | 30 | 31 | 22 | 38 | 31 | 0.77 | 0.21 | 0.10 |
6 | 0.35 | 5.5 | 13 | e5.5 | 26 | 43 | 19 | 1760 | 27 | 0.67 | 0.20 | 0.12 |
7 | 1.0 | 5.6 | 12 | e5.8 | 25 | 43 | 17 | 3830 | 26 | 0.61 | 0.24 | 0.13 |
8 | 1.1 | 5.4 | 12 | e6.5 | 23 | 32 | 199 | 1560 | 23 | 0.74 | 0.27 | 0.13 |
9 | 0.70 | 5.1 | 10 | 7.6 | 22 | 1050 | 173 | 1190 | 19 | 0.76 | 0.28 | 0.13 |
10 | 9.1 | 5.1 | 9.5 | 7.8 | 22 | 250 | 55 | 280 | 19 | 0.85 | 0.29 | 0.15 |
11 | 23 | 5.0 | 9.0 | 7.7 | 23 | 79 | 34 | 243 | 290 | 1.5 | 0.29 | 0.13 |
12 | 190 | 5.0 | 17 | 7.4 | 21 | 62 | 153 | 2470 | 504 | 39 | 0.35 | 0.14 |
13 | 64 | 5.2 | 110 | 7.3 | 18 | 53 | 240 | 2900 | 542 | 5.6 | 0.33 | 0.14 |
14 | 110 | 5.1 | 322 | 7.3 | 16 | 46 | 57 | 389 | 566 | 1.3 | 0.33 | 0.15 |
15 | 26 | 4.8 | 124 | 7.0 | 16 | 65 | 36 | 156 | 72 | 0.68 | 0.27 | 0.13 |
16 | 133 | 4.8 | 470 | 6.7 | 15 | 247 | 24 | 172 | 247 | 0.48 | 0.21 | 0.18 |
17 | 38 | 4.8 | 1260 | 6.4 | 14 | 81 | 18 | 306 | 64 | 0.36 | 0.16 | 151 |
18 | 17 | 5.0 | 256 | 6.3 | 13 | 60 | 13 | 348 | 38 | 0.42 | 0.40 | 902 |
19 | 14 | 5.1 | 71 | 6.4 | 37 | 95 | 123 | 121 | 26 | 0.46 | 0.61 | 73 |
20 | 12 | 4.9 | 45 | 6.5 | 148 | 285 | 647 | 91 | 17 | 0.39 | 5.8 | 32 |
21 | 11 | 5.0 | 29 | 6.6 | 54 | 98 | 469 | 79 | 11 | 0.33 | 1.0 | 29 |
22 | 10 | 4.9 | 25 | 6.7 | 32 | 56 | 134 | 71 | 7.3 | 0.35 | 0.39 | 12 |
23 | 17 | 4.9 | 25 | 7.6 | 27 | 45 | 58 | 66 | 5.0 | 0.37 | 12 | 3.8 |
24 | 324 | 13 | 19 | 9.3 | 26 | 40 | 629 | 62 | 7.0 | 0.29 | 0.87 | 1.9 |
25 | 264 | 14 | 14 | 9.0 | 24 | 675 | 489 | 59 | 4.8 | 0.39 | 0.15 | 1.7 |
26 | 26 | 8.1 | e11 | 7.7 | e20 | 170 | 83 | 53 | 15 | 0.45 | 0.15 | 1.4 |
27 | 14 | 6.2 | e9.5 | 7.2 | e18 | 382 | 679 | 91 | 3.5 | 0.45 | 0.16 | 0.97 |
28 | 11 | 27 | e8.5 | 7.0 | e18 | 654 | 934 | 592 | 2.7 | 0.35 | 0.14 | 0.76 |
29 | 9.4 | 106 | e7.5 | 7.0 | --- | 271 | 132 | 96 | 2.2 | 0.28 | 0.12 | 0.69 |
30 | 8.6 | 453 | e7.0 | 87 | --- | 121 | 70 | 69 | 1.9 | 0.29 | 0.11 | 0.94 |
31 | 7.5 | --- | e6.5 | 1110 | --- | 70 | --- | 55 | --- | 0.27 | 0.11 | --- |
TOTAL | 1342.56 | 750.4 | 3068.5 | 1394.0 | 1637 | 5530 | 5654 | 17741 | 2729.4 | 62.94 | 26.38 | 1213.14 |
MEAN | 43.31 | 25.01 | 98.98 | 44.97 | 58.46 | 178.4 | 188.5 | 572.3 | 90.98 | 2.030 | 0.851 | 40.44 |
MAX | 324 | 453 | 1260 | 1110 | 771 | 1050 | 934 | 3830 | 566 | 39 | 12 | 902 |
MIN | 0.07 | 4.8 | 6.5 | 5.0 | 13 | 20 | 13 | 38 | 1.9 | 0.27 | 0.11 | 0.08 |
CFSM | 0.78 | 0.45 | 1.78 | 0.81 | 1.05 | 3.21 | 3.40 | 10.3 | 1.64 | 0.04 | 0.02 | 0.73 |
IN. | 0.90 | 0.50 | 2.06 | 0.93 | 1.10 | 3.71 | 3.79 | 11.89 | 1.83 | 0.04 | 0.02 | 0.81 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1964 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 15.62 | 25.54 | 54.62 | 57.55 | 66.49 | 75.99 | 76.30 | 68.59 | 39.01 | 17.29 | 10.91 | 14.22 |
MAX | 192 | 193 | 256 | 279 | 222 | 313 | 347 | 572 | 203 | 176 | 127 | 181 |
(WY) | 1970 | 1994 | 1983 | 1974 | 1982 | 1978 | 1994 | 2002 | 1973 | 1982 | 1998 | 1993 |
MIN | 0.000 | 0.082 | 0.049 | 0.16 | 1.75 | 2.90 | 4.09 | 1.36 | 0.13 | 0.000 | 0.000 | 0.000 |
(WY) | 1964 | 1998 | 1977 | 1977 | 2000 | 2000 | 2000 | 1988 | 1988 | 1964 | 1988 | 1964 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1964 - 2002 | |||
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ANNUAL TOTAL | 16029.31 | 41149.32 | ||||
ANNUAL MEAN | 43.92 | 112.7 | 43.39 | |||
HIGHEST ANNUAL MEAN | 113 | 2002 | ||||
LOWEST ANNUAL MEAN | 6.76 | 1992 | ||||
HIGHEST DAILY MEAN | 1260 | Dec 17 | 3830 | May 7 | 3830 | May 7 2002 |
LOWEST DAILY MEAN | 0.07 | Oct 4 | 0.07 | Oct 4 | 0.00 | A |
ANNUAL SEVEN-DAY MINIMUM | 0.11 | Sep 28 | 0.10 | Aug 30 | 0.00 | Oct 1 1963 |
MAXIMUM PEAK FLOW | 5680 | May 7 | 5910 B | Dec 7 1966 | ||
MAXIMUM PEAK STAGE | 14.56 | May 7 | 14.75 C | Aug 5 1998 | ||
INSTANTANEOUS LOW FLOW | 0.05 | Oct 4 | ||||
ANNUAL RUNOFF (CFSM) | 0.79 | 2.03 | 0.78 | |||
ANNUAL RUNOFF (INCHES) | 10.74 | 27.58 | 10.62 | |||
10 PERCENT EXCEEDS | 67 | 267 | 63 | |||
50 PERCENT EXCEEDS | 9.0 | 14 | 4.9 | |||
90 PERCENT EXCEEDS | 0.49 | 0.26 | 0.10 |
B - From rating curve extended above 2,200 ft3/s, gage height, 14.45 ft. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |