LOCATION.-- Lat 41°40'18", long 88°26'29" (NAD of 1927), in SE1/4NW1/4 sec.21, T.37 N., R.7 E., Kendall County, Hydrologic Unit 07120007, on right bank 300 ft upstream from bridge on State Highway 47, 2.0 mi north of Yorkville, and at mile 3.3. |
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DRAINAGE AREA.-- 70.2 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1960 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 612.34 ft above NGVD of 1929. |
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REMARKS.-- Diversion about 7 miles upstream near Jericho Rd. that crosses the watershed divide during overbank flow. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE -WATER DISCHARGE AND STAGE: Maximum discharge, 5,510 ft3/s, from rating curve extended above 3,900 ft3/s, July 18, 1996, gage height, 13.16 ft, backwater from debris jam; minimum, 0.10 ft3/s, Dec. 7, 1962, result of freeze up. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharge, 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 | 7.6 | 13 | 11 | e10 | 14 | 11 | 16 | 120 | 50 | 9.7 | 55 | 4.6 |
2 | 9.3 | 12 | 15 | e10 | 14 | 11 | 14 | 245 | 40 | 8.7 | 61 | 5.4 |
3 | 13 | 14 | 13 | 11 | 16 | 10 | 14 | 180 | 42 | 8.4 | 67 | 4.3 |
4 | 13 | 14 | 13 | 11 | 17 | 11 | 23 | 134 | 39 | 7.8 | 57 | 3.2 |
5 | 20 | 14 | 12 | e10 | 17 | 11 | 85 | 182 | 33 | 8.4 | 49 | 3.3 |
6 | 19 | 14 | 12 | e10 | 14 | 11 | 95 | 210 | 30 | 15 | 30 | 3.1 |
7 | 15 | 14 | 13 | e10 | 14 | 11 | 71 | 152 | 29 | 17 | 40 | 2.6 |
8 | 13 | 14 | 12 | e9.8 | 13 | 11 | 58 | 132 | 34 | 20 | 33 | 1.9 |
9 | 11 | 14 | 12 | e9.0 | 14 | 12 | 47 | 215 | 45 | 27 | 28 | 2.1 |
10 | 12 | 15 | 12 | 8.6 | e13 | 11 | 43 | 298 | 41 | 28 | 25 | 2.5 |
11 | 11 | 15 | 12 | 10 | e12 | 11 | 43 | 261 | 36 | 23 | 22 | 1.8 |
12 | 10 | 15 | 13 | e10 | e12 | 14 | 37 | 221 | 32 | 18 | 19 | 1.7 |
13 | 9.7 | 14 | 13 | e10 | e11 | 29 | 31 | 167 | 29 | 14 | 17 | 1.6 |
14 | 9.6 | 14 | 14 | e11 | e11 | 40 | 26 | 138 | 25 | 12 | 15 | 2.6 |
15 | 9.5 | 16 | 14 | 12 | e11 | 23 | 23 | 123 | 22 | 39 | 13 | 2.5 |
16 | 10 | 16 | 13 | 13 | e11 | 20 | 22 | 110 | 19 | 97 | 11 | 2.3 |
17 | 9.4 | 14 | 14 | 13 | e11 | 20 | 22 | 92 | 18 | 52 | 11 | 1.8 |
18 | 9.9 | 14 | 18 | 13 | e11 | 25 | 21 | 78 | 18 | 80 | 9.0 | 1.8 |
19 | 11 | 14 | 21 | e12 | e11 | 23 | 20 | 69 | 22 | 57 | 7.8 | 1.6 |
20 | 11 | 15 | 21 | e12 | e11 | 25 | 19 | 70 | 22 | 40 | 6.8 | 1.3 |
21 | 11 | 16 | 18 | e12 | e11 | 28 | 19 | 63 | 18 | 35 | 6.0 | 1.4 |
22 | 10 | 17 | 14 | e13 | e12 | 25 | 18 | 54 | 15 | 29 | 6.5 | 1.9 |
23 | 11 | 15 | 12 | e12 | e11 | 23 | 17 | 48 | 14 | 24 | 5.7 | 1.9 |
24 | 11 | 14 | e11 | e11 | e11 | 19 | 17 | 43 | 12 | 20 | 4.7 | 2.9 |
25 | 12 | 14 | e11 | e12 | e11 | 18 | 15 | 38 | 13 | 16 | 4.1 | 3.4 |
26 | 13 | 14 | e10 | e12 | e11 | 18 | 17 | 33 | 14 | 13 | 4.0 | 4.2 |
27 | 14 | 14 | e10 | e11 | 12 | 16 | 15 | 30 | 14 | 16 | 4.2 | 5.7 |
28 | 14 | 14 | e10 | e11 | 12 | 17 | 14 | 28 | 12 | 18 | 3.9 | 5.4 |
29 | 15 | 16 | e10 | e11 | --- | 19 | 15 | 32 | 12 | 26 | 3.4 | 4.9 |
30 | 14 | 14 | e10 | e12 | --- | 20 | 20 | 35 | 12 | 23 | 3.1 | 4.8 |
31 | 13 | --- | e11 | e13 | --- | 17 | --- | 57 | --- | 22 | 3.4 | --- |
TOTAL | 372.0 | 433 | 405 | 345.4 | 349 | 560 | 897 | 3658 | 762 | 824.0 | 625.6 | 88.5 |
MEAN | 12.0 | 14.4 | 13.1 | 11.1 | 12.5 | 18.1 | 29.9 | 118 | 25.4 | 26.6 | 20.2 | 2.95 |
MAX | 20 | 17 | 21 | 13 | 17 | 40 | 95 | 298 | 50 | 97 | 67 | 5.7 |
MIN | 7.6 | 12 | 10 | 8.6 | 11 | 10 | 14 | 28 | 12 | 7.8 | 3.1 | 1.3 |
CFSM | 0.17 | 0.21 | 0.19 | 0.16 | 0.18 | 0.26 | 0.43 | 1.68 | 0.36 | 0.38 | 0.29 | 0.04 |
IN. | 0.20 | 0.23 | 0.21 | 0.18 | 0.18 | 0.30 | 0.48 | 1.94 | 0.40 | 0.44 | 0.33 | 0.05 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 31.0 | 41.8 | 45.8 | 43.4 | 61.9 | 84.4 | 87.6 | 77.8 | 63.8 | 46.0 | 28.5 | 31.0 |
MAX | 126 | 175 | 217 | 146 | 202 | 360 | 249 | 221 | 197 | 381 | 172 | 131 |
(WY) | 1973 | 1986 | 1983 | 1993 | 1997 | 1979 | 1979 | 1974 | 1974 | 1996 | 1987 | 1987 |
MIN | 5.42 | 7.44 | 4.16 | 4.25 | 5.46 | 18.1 | 27.2 | 16.7 | 14.3 | 8.43 | 4.21 | 2.95 |
(WY) | 1964 | 1964 | 1964 | 1977 | 1963 | 2003 | 1963 | 1989 | 1977 | 1961 | 1991 | 2003 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1961 - 2003 | |||
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ANNUAL TOTAL | 17704.1 | 9319.5 | ||||
ANNUAL MEAN | 48.5 | 25.5 | 53.5 | |||
HIGHEST ANNUAL MEAN | 97.8 | 1993 | ||||
LOWEST ANNUAL MEAN | 16.7 | 1977 | ||||
HIGHEST DAILY MEAN | 489 | Jun 6 | 298 | May 10 | 3460 | Jul 19 1996 |
LOWEST DAILY MEAN | 7.2 | Sep 14 | 1.3 | Sep 20 | 1.3 | Sep 20 2003 |
ANNUAL SEVEN-DAY MINIMUM | 7.5 | Sep 10 | 1.7 | Sep 17 | 1.7 | Sep 17 2003 |
MAXIMUM PEAK FLOW | 313 | May 10 | 5510 A | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 6.59 | May 10 | 13.16 B | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 0.65 | Sep 20 | 0.10 C | Dec 7 1962 | ||
ANNUAL RUNOFF (CFSM) | 0.69 | 0.36 | 0.76 | |||
ANNUAL RUNOFF (INCHES) | 9.38 | 4.94 | 10.36 | |||
10 PERCENT EXCEEDS | 105 | 49 | 110 | |||
50 PERCENT EXCEEDS | 25 | 14 | 31 | |||
90 PERCENT EXCEEDS | 10 | 5.4 | 9.9 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |