LOCATION.-- Lat 38°43'00", long 89°49'45" (NAD of 1927), in SE1/4SW1/4 sec.12, T.3 N., R.7 W., Madison County, Hydrologic Unit 07140204, on right bank at upstream side of bridge on U.S. Highway 40, 0.2 mi upstream from railroad bridge, 1.9 mi upstream from East Fork Silver Creek, 1.9 mi southeast of Troy, and at mile 44.6. |
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DRAINAGE AREA.-- 154 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1966 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 1978-91. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 438.91 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, 10,600 ft3/s, April 12, 1979, gage height, 17.52 ft; maximum gage height, 17.94 ft, May 17, 1990, discharge, 9,170 ft3/s; no flow for several days in 1967-68, 1973, 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 | e3.0 | 7.1 | 3.2 | 36 | e5.0 | e20 | 22 | 57 | 18 | 34 | 6.4 | 83 |
2 | e3.1 | 4.3 | 3.0 | 25 | e5.7 | e34 | 18 | 44 | 16 | 29 | 4.6 | 449 |
3 | 14 | 3.9 | 2.9 | 21 | e6.6 | e50 | 16 | 36 | 29 | 25 | 25 | 406 |
4 | 7.1 | 3.7 | 2.6 | 17 | 7.8 | e55 | 14 | 130 | 29 | 19 | 356 | 125 |
5 | 5.7 | 5.9 | e2.5 | 15 | 6.8 | 61 | 13 | 472 | 24 | 17 | 174 | 38 |
6 | e5.0 | 8.0 | e2.4 | 17 | 6.7 | 48 | 13 | 448 | 20 | 14 | 38 | 19 |
7 | e4.5 | 4.9 | e2.3 | 19 | e6.2 | 35 | 22 | 275 | 22 | 11 | 17 | 11 |
8 | e4.2 | 5.6 | e2.3 | 21 | e5.5 | 29 | 19 | 315 | 19 | 8.9 | 9.2 | 7.2 |
9 | e4.0 | 6.2 | e2.3 | 18 | e5.2 | 25 | 19 | 367 | 16 | 12 | 5.5 | 5.7 |
10 | e3.7 | 5.4 | e2.4 | 15 | e4.6 | 20 | 16 | 571 | 156 | 19 | 3.7 | 3.7 |
11 | e3.5 | 4.9 | e2.5 | e10 | e4.4 | 18 | 14 | 799 | 708 | 10 | 3.2 | 3.0 |
12 | e3.4 | 4.0 | 2.6 | e8.0 | e4.2 | 68 | 11 | 764 | 1420 | 15 | 2.9 | 2.7 |
13 | e3.3 | 3.7 | 2.8 | e6.6 | e4.2 | 131 | 9.5 | 514 | 1730 | 12 | 2.7 | 2.7 |
14 | e3.2 | 3.5 | 3.1 | e5.6 | e9.0 | 168 | 8.5 | 163 | 1960 | 8.2 | 2.7 | 2.6 |
15 | e3.1 | 4.7 | 3.1 | e5.0 | 40 | 112 | 7.8 | 75 | 1430 | 5.2 | 2.6 | 2.6 |
16 | e3.0 | 4.4 | 3.0 | e4.4 | 172 | 64 | 8.0 | 52 | 551 | 3.9 | 2.4 | 2.5 |
17 | e2.9 | 4.3 | 2.8 | e4.0 | 162 | 47 | 19 | 43 | 160 | 3.4 | 2.4 | 2.8 |
18 | e4.0 | 4.0 | 13 | e3.7 | 69 | 38 | 16 | 37 | 80 | 173 | 2.5 | 2.6 |
19 | 14 | 4.0 | 31 | e3.5 | 111 | 99 | 22 | 35 | 65 | 441 | 2.4 | 2.6 |
20 | 6.4 | 4.0 | 23 | e3.8 | 370 | 165 | 90 | 32 | 53 | 347 | 2.2 | 2.5 |
21 | 5.5 | 3.8 | 13 | e3.6 | 281 | 174 | 119 | 30 | 40 | 84 | 2.3 | 2.3 |
22 | 4.6 | 3.9 | 9.4 | e3.2 | 148 | 98 | 60 | 31 | 33 | 33 | 2.2 | 2.4 |
23 | e2.6 | 3.6 | 7.4 | e2.9 | 96 | 62 | 28 | 24 | 28 | 21 | 2.1 | 2.6 |
24 | e2.6 | 3.5 | e6.0 | e2.8 | 62 | 42 | 37 | 20 | 24 | 13 | 2.2 | 2.5 |
25 | 51 | 3.7 | e5.0 | e3.0 | 44 | 38 | 96 | 135 | 21 | 7.8 | 2.4 | 2.4 |
26 | 37 | 3.5 | e4.8 | e3.3 | e30 | 36 | 329 | 158 | 701 | 5.3 | 2.5 | 7.1 |
27 | 15 | 3.5 | e4.5 | e4.5 | e23 | 29 | 125 | 61 | 613 | 4.3 | 2.7 | 27 |
28 | 9.9 | 3.4 | e4.7 | e3.7 | e21 | 31 | 74 | 33 | 221 | 3.7 | 2.9 | 3.4 |
29 | 127 | 3.3 | e5.0 | e3.5 | --- | 40 | 76 | 44 | 67 | 3.6 | 2.9 | 2.3 |
30 | 79 | 3.2 | e9.0 | e3.7 | --- | 33 | 64 | 33 | 42 | 3.3 | 3.1 | 2.0 |
31 | 20 | --- | 38 | e4.2 | --- | 28 | --- | 25 | --- | 11 | 11 | --- |
TOTAL | 455.3 | 131.9 | 219.6 | 297.0 | 1710.9 | 1898 | 1385.8 | 5823 | 10296 | 1397.6 | 701.7 | 1228.2 |
MEAN | 14.7 | 4.40 | 7.08 | 9.58 | 61.1 | 61.2 | 46.2 | 188 | 343 | 45.1 | 22.6 | 40.9 |
MAX | 127 | 8.0 | 38 | 36 | 370 | 174 | 329 | 799 | 1960 | 441 | 356 | 449 |
MIN | 2.6 | 3.2 | 2.3 | 2.8 | 4.2 | 18 | 7.8 | 20 | 16 | 3.3 | 2.1 | 2.0 |
CFSM | 0.10 | 0.03 | 0.05 | 0.06 | 0.40 | 0.40 | 0.30 | 1.22 | 2.23 | 0.29 | 0.15 | 0.27 |
IN. | 0.11 | 0.03 | 0.05 | 0.07 | 0.41 | 0.46 | 0.33 | 1.41 | 2.49 | 0.34 | 0.17 | 0.30 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 27.5 | 85.5 | 159 | 137 | 206 | 219 | 233 | 165 | 114 | 71.7 | 31.8 | 25.7 |
MAX | 165 | 509 | 902 | 562 | 646 | 927 | 738 | 957 | 501 | 570 | 296 | 408 |
(WY) | 1987 | 1985 | 1983 | 1974 | 1982 | 1978 | 1994 | 2002 | 1998 | 1969 | 1998 | 1993 |
MIN | 0.23 | 0.34 | 0.42 | 0.31 | 9.25 | 6.74 | 13.4 | 5.26 | 0.91 | 1.44 | 0.75 | 0.093 |
(WY) | 1972 | 1972 | 1977 | 1977 | 1978 | 1981 | 2000 | 1977 | 1988 | 1984 | 1971 | 1988 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1967 - 2003 | |||
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ANNUAL TOTAL | 55098.1 | 25545.0 | ||||
ANNUAL MEAN | 151 | 70.0 | 122 | |||
HIGHEST ANNUAL MEAN | 244 | 1983 | ||||
LOWEST ANNUAL MEAN | 23.1 | 1980 | ||||
HIGHEST DAILY MEAN | 5420 | May 8 | 1960 | Jun 14 | 7740 | Apr 12 1979 |
LOWEST DAILY MEAN | 2.3 A | Dec 7-9 | 2.0 B | Sep 30 | 0.00 | C |
ANNUAL SEVEN-DAY MINIMUM | 2.4 | Dec 5 | 2.3 | Aug 19 | 0.00 | Sep 29 1968 |
MAXIMUM PEAK FLOW | 2060 | Jun 14 | 10600 D | Apr 12 1979 | ||
MAXIMUM PEAK STAGE | 14.14 | Jun 14 | 17.94 E | May 17 1990 | ||
INSTANTANEOUS LOW FLOW | 1.8 | Sep 30 | ||||
ANNUAL RUNOFF (CFSM) | 0.98 | 0.45 | 0.80 | |||
ANNUAL RUNOFF (INCHES) | 13.31 | 6.17 | 10.80 | |||
10 PERCENT EXCEEDS | 319 | 157 | 300 | |||
50 PERCENT EXCEEDS | 16 | 12 | 16 | |||
90 PERCENT EXCEEDS | 3.4 | 2.7 | 0.85 |
A - Estimated, but may have been less during periods of estimated discharge in October and December. |
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B - May have been less during periods of estimated discharge in October and December. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |