LOCATION.-- Lat 42°03'31", long 88°18'14" (NAD of 1927), in SE1/4SE1/4 sec.3, T.41 N., R.9 E., Kane County, Hydrologic Unit 07120006, on right bank 50 ft upstream from bridge on Big Timber Road, .5 mi west of Elgin, and at mile 1.6. | |
DRAINAGE AREA.-- 38.9 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: May 1998 to current year. | |
STAGE: May 1998 to current year. | |
PARTIAL RECORD: Annual maximum, water years 1962, 1963, 1965-80. Miscellaneous discharge measurements, November 1990. | |
PRECIPITATION: October 1998 to current year. | |
GAGE.-- Water-stage recorder, phone telemeter, rain gage, and crest-stage gage. Datum of gage is 745.00 ft above NGVD of 1929. Prior to Sept. 30, 1980, at downstream side of bridge 100 ft downstream and at datum 7.36 ft higher. | |
REMARKS.-- Collection, computation and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Precipitation data could be subject to error for days with freezing and/or thawing of precipitation. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,650 ft3/s, Aug. 22, 2002, gage height, 8.26 ft, from rating curve extended above 580 ft3/s; minimum discharge, 0.67 ft3/s, Sept. 30, 2003. | |
PRECIPITATION: Maximum daily total, 4.40 in., August 22, 2002. | |
REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, and those above 1,100 ft3/s, which are poor. | |
| Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 3.5 | 3.8 | e3.0 | 3.0 | 2.4 | 2.3 | 4.6 | 179 | 16 | 3.0 | 3.1 | 3.4 |
| 2 | 13 | 4.4 | e2.9 | 2.9 | 3.6 | 2.2 | 3.3 | 116 | 15 | 2.1 | 4.3 | 1.6 |
| 3 | 6.1 | 3.8 | e2.7 | 3.4 | 4.0 | 2.1 | 11 | 68 | 15 | 7.0 | 4.1 | 1.3 |
| 4 | 19 | 3.6 | e2.5 | 3.1 | 2.9 | 2.4 | 63 | 66 | 14 | 4.8 | 3.2 | 0.97 |
| 5 | 12 | 5.0 | e2.4 | 3.3 | 2.6 | 2.5 | 49 | 169 | 12 | 22 | 2.7 | 0.94 |
| 6 | 7.7 | 4.3 | e2.4 | 3.2 | 2.3 | 2.6 | 29 | 110 | 11 | 4.1 | 37 | 0.92 |
| 7 | 6.5 | 4.7 | e2.4 | 3.2 | 1.8 | 2.5 | 25 | 74 | 10 | 5.3 | 9.6 | 0.94 |
| 8 | 5.3 | 5.8 | e2.4 | 3.5 | 1.5 | 2.6 | 20 | 53 | 23 | 12 | 7.7 | 0.92 |
| 9 | 6.2 | 6.8 | e2.4 | 3.5 | 1.3 | 2.2 | 19 | 109 | 19 | 14 | 3.6 | 0.94 |
| 10 | 6.2 | 7.6 | e2.5 | 3.1 | 1.4 | 2.0 | 24 | 145 | 14 | 10 | 2.8 | 0.93 |
| 11 | 4.4 | 5.9 | e2.5 | 2.7 | 1.2 | 2.4 | 20 | 188 | 12 | 6.0 | 2.5 | 0.93 |
| 12 | 4.4 | 5.3 | e2.5 | 2.3 | 1.0 | 9.9 | 15 | 127 | 11 | 3.7 | 2.7 | 1.1 |
| 13 | 3.4 | 5.7 | e2.5 | 2.1 | 1.0 | 13 | 12 | 88 | 11 | 2.5 | 2.2 | 1.1 |
| 14 | 4.2 | 7.1 | e2.5 | 2.1 | 1.1 | 12 | 11 | 106 | 8.4 | 1.9 | 2.2 | 4.3 |
| 15 | 4.3 | 6.1 | e2.5 | 1.7 | 1.3 | 14 | 8.3 | 121 | 6.8 | 31 | 2.3 | 1.4 |
| 16 | 3.3 | 5.3 | e2.6 | 1.9 | 1.3 | 16 | 7.2 | 85 | 6.2 | 19 | 1.9 | 1.0 |
| 17 | 3.9 | 5.1 | e3.0 | 1.6 | 1.4 | 14 | 5.7 | 66 | 3.1 | 11 | 2.3 | 0.95 |
| 18 | 4.4 | 6.0 | e10 | 1.5 | 1.5 | 14 | 4.8 | 54 | 11 | 5.9 | 1.4 | 0.92 |
| 19 | 3.3 | 5.9 | e13 | 1.5 | 1.6 | 14 | 5.6 | 48 | 14 | 6.1 | 1.3 | 0.90 |
| 20 | 4.0 | 5.3 | e9.0 | 1.6 | 2.0 | 14 | 6.4 | 64 | 8.7 | 5.3 | 1.4 | 0.92 |
| 21 | 3.1 | 5.7 | e5.6 | 1.5 | 2.0 | 18 | 6.6 | 54 | 10 | 14 | 1.3 | 1.0 |
| 22 | 3.0 | 5.1 | e4.3 | 1.2 | 2.1 | 14 | 5.7 | 43 | 8.9 | 15 | 0.97 | 3.3 |
| 23 | 4.6 | 5.0 | e3.8 | 0.96 | 2.2 | 10 | 5.3 | 36 | 5.9 | 8.7 | 0.97 | 1.0 |
| 24 | 4.0 | 4.9 | e3.6 | 0.92 | 2.2 | 11 | 3.1 | 31 | 4.4 | 6.3 | 1.0 | 1.0 |
| 25 | 7.3 | 4.5 | e3.5 | 0.98 | 2.1 | 19 | 3.0 | 26 | 4.1 | 5.0 | 0.98 | 1.1 |
| 26 | 6.3 | 4.2 | e3.4 | 1.2 | 2.1 | 15 | 3.2 | 23 | 3.7 | 4.2 | 1.9 | 9.1 |
| 27 | 3.7 | 3.9 | e3.4 | 1.2 | 2.2 | 13 | 2.7 | 21 | 2.7 | 3.6 | 1.0 | 1.4 |
| 28 | 3.3 | 3.7 | e3.4 | 1.3 | 2.1 | 24 | 1.9 | 21 | 4.1 | 3.5 | 1.0 | 0.87 |
| 29 | 4.1 | e3.7 | e3.3 | 1.4 | --- | 24 | 1.8 | 21 | 3.6 | 1.4 | 0.97 | 0.75 |
| 30 | 5.0 | e3.3 | e3.3 | 1.5 | --- | 19 | 36 | 20 | 3.9 | 1.1 | 0.94 | 0.70 |
| 31 | 4.4 | --- | 3.1 | 2.2 | --- | 14 | --- | 19 | --- | 5.5 | 1.8 | --- |
| TOTAL | 173.9 | 151.5 | 116.4 | 65.56 | 54.2 | 327.7 | 413.2 | 2351 | 292.5 | 245.0 | 111.13 | 46.60 |
| MEAN | 5.61 | 5.05 | 3.75 | 2.11 | 1.94 | 10.6 | 13.8 | 75.8 | 9.75 | 7.90 | 3.58 | 1.55 |
| MAX | 19 | 7.6 | 13 | 3.5 | 4.0 | 24 | 63 | 188 | 23 | 31 | 37 | 9.1 |
| MIN | 3.0 | 3.3 | 2.4 | 0.92 | 1.0 | 2.0 | 1.8 | 19 | 2.7 | 1.1 | 0.94 | 0.70 |
| CFSM | 0.14 | 0.13 | 0.10 | 0.05 | 0.05 | 0.27 | 0.35 | 1.95 | 0.25 | 0.20 | 0.09 | 0.04 |
| IN. | 0.17 | 0.14 | 0.11 | 0.06 | 0.05 | 0.31 | 0.40 | 2.25 | 0.28 | 0.23 | 0.11 | 0.04 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 26.6 | 19.4 | 14.0 | 21.1 | 47.4 | 32.3 | 53.8 | 50.4 | 61.5 | 14.6 | 13.0 | 10.2 |
| MAX | 77.3 | 40.6 | 23.0 | 67.6 | 111 | 48.8 | 117 | 75.8 | 119 | 35.8 | 48.8 | 19.4 |
| (WY) | 2002 | 2001 | 2002 | 1999 | 2001 | 2001 | 1999 | 2003 | 2002 | 2000 | 2002 | 2000 |
| MIN | 5.61 | 5.05 | 3.75 | 2.11 | 1.94 | 10.6 | 13.8 | 35.5 | 9.75 | 6.40 | 3.58 | 1.55 |
| (WY) | 2003 | 2003 | 2003 | 2003 | 2003 | 2003 | 2003 | 2001 | 2003 | 2001 | 2003 | 2003 |
| SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1998 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 11996.6 | 4348.69 | ||||
| ANNUAL MEAN | 32.9 | 11.9 | 30.9 | |||
| HIGHEST ANNUAL MEAN | 44.2 | 1999 | ||||
| LOWEST ANNUAL MEAN | 11.9 | 2003 | ||||
| HIGHEST DAILY MEAN | 803 | Jun 5 | 188 | May 11 | 803 | Jun 5 2002 |
| LOWEST DAILY MEAN | 1.0 | Aug 11 | 0.70 | Sep 30 | 0.70 | Sep 30 2003 |
| ANNUAL SEVEN-DAY MINIMUM | 1.7 | Aug 6 | 0.93 | Sep 5 | 0.93 | Sep 5 2003 |
| MAXIMUM PEAK FLOW | 778 | May 10 | 1650 A | Aug 22 2002 | ||
| MAXIMUM PEAK STAGE | 7.62 | May 10 | 8.26 | Aug 22 2002 | ||
| INSTANTANEOUS LOW FLOW | 0.67 | Sep 30 | 0.67 | Sep 30 2003 | ||
| ANNUAL RUNOFF (CFSM) | 0.84 | 0.31 | 0.79 | |||
| ANNUAL RUNOFF (INCHES) | 11.47 | 4.16 | 10.79 | |||
| 10 PERCENT EXCEEDS | 64 | 23 | 68 | |||
| 50 PERCENT EXCEEDS | 11 | 3.8 | 14 | |||
| 90 PERCENT EXCEEDS | 3.1 | 1.1 | 2.7 | |||