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. | |
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, 0.97 ft3/s, Aug. 11-13, 2002. | |
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, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 5.7 | 45 | 32 | 12 | 16 | 24 | 25 | 57 | 15 | 25 | 2.6 | 13 |
| 2 | 5.5 | 37 | 27 | 10 | 11 | 25 | 26 | 58 | 13 | 21 | 2.3 | 34 |
| 3 | 4.7 | 31 | 25 | 9.0 | 11 | 22 | 24 | 47 | 23 | 19 | 2.1 | 27 |
| 4 | 11 | 27 | 23 | 8.3 | 7.8 | 35 | 22 | 32 | 754 | 12 | 16 | 17 |
| 5 | 14 | 23 | 23 | e8.3 | 9.2 | 25 | 20 | 29 | 803 | 12 | 8.6 | 13 |
| 6 | 9.6 | 23 | 20 | e8.3 | 8.3 | 23 | 18 | 27 | 533 | 12 | 3.3 | 11 |
| 7 | 6.6 | 23 | 18 | e7.9 | 8.7 | 25 | 26 | 24 | 286 | 11 | 2.2 | 8.7 |
| 8 | 5.6 | 20 | 16 | e7.2 | 9.3 | 109 | 76 | 22 | 183 | 11 | 1.6 | 7.9 |
| 9 | 5.0 | 18 | 15 | e7.6 | 13 | 206 | 161 | 30 | 121 | 19 | 1.4 | 6.6 |
| 10 | 9.4 | 17 | 13 | e7.8 | 44 | 132 | 106 | 20 | 89 | 8.7 | 1.3 | 7.5 |
| 11 | 8.2 | 17 | 13 | e7.7 | 51 | 88 | 75 | 73 | 87 | 8.4 | 1.0 | 5.8 |
| 12 | 21 | 15 | 17 | e7.7 | 36 | 73 | 61 | 283 | 67 | 6.4 | 1.1 | 6.2 |
| 13 | 89 | 16 | 38 | e7.6 | 30 | 66 | 56 | 194 | 56 | 6.2 | 84 | 5.4 |
| 14 | 133 | 18 | 38 | e7.8 | 26 | 59 | 60 | 134 | 53 | 5.5 | 22 | 5.4 |
| 15 | 85 | 18 | 31 | e7.8 | 24 | 52 | 54 | 91 | 49 | 5.0 | 10 | 4.5 |
| 16 | 60 | 17 | 29 | e7.7 | 23 | 42 | 50 | 111 | 42 | 4.1 | 5.3 | 3.8 |
| 17 | 49 | 16 | 29 | e7.5 | 20 | 38 | 45 | 131 | 38 | 4.0 | 3.6 | 4.3 |
| 18 | 40 | 17 | 26 | e7.6 | 19 | 36 | 41 | 95 | 35 | 3.4 | 2.8 | 5.4 |
| 19 | 35 | 17 | 28 | e7.5 | 29 | 33 | 39 | 71 | 32 | 3.4 | 3.3 | 9.8 |
| 20 | 31 | 14 | 25 | 7.9 | 79 | 32 | 34 | 56 | 28 | 3.8 | 2.3 | 8.6 |
| 21 | 27 | 14 | 23 | 8.8 | 96 | 28 | 45 | 47 | 25 | 3.4 | 2.5 | 5.9 |
| 22 | 46 | 13 | 26 | 9.4 | 63 | 24 | 42 | 40 | 23 | 2.7 | 651 | 8.1 |
| 23 | 403 | 13 | 30 | 12 | 50 | 24 | 39 | 36 | 21 | 2.6 | 240 | 5.2 |
| 24 | 368 | 26 | 27 | 13 | 43 | 24 | 43 | 33 | 20 | 2.5 | 150 | 5.4 |
| 25 | 294 | 33 | 21 | 12 | 39 | 22 | 40 | 34 | 25 | 2.2 | 93 | 4.3 |
| 26 | 206 | 27 | 20 | 11 | 34 | 21 | 36 | 31 | 37 | 2.5 | 65 | 4.3 |
| 27 | 142 | 24 | 20 | 11 | 29 | 20 | 49 | 25 | 36 | 7.7 | 44 | 4.2 |
| 28 | 97 | 21 | 19 | 13 | 26 | 19 | 62 | 23 | 32 | 3.8 | 32 | 3.8 |
| 29 | 72 | 22 | 15 | 13 | --- | 33 | 59 | 22 | 27 | 12 | 24 | 4.6 |
| 30 | 59 | 32 | 14 | 11 | --- | 33 | 47 | 21 | 25 | 4.2 | 20 | 3.0 |
| 31 | 53 | --- | 12 | 13 | --- | 26 | --- | 18 | --- | 3.6 | 16 | --- |
| TOTAL | 2395.3 | 654 | 713 | 290.4 | 855.3 | 1419 | 1481 | 1915 | 3578 | 248.1 | 1514.3 | 253.7 |
| MEAN | 77.27 | 21.80 | 23.00 | 9.368 | 30.55 | 45.77 | 49.37 | 61.77 | 119.3 | 8.003 | 48.85 | 8.457 |
| MAX | 403 | 45 | 38 | 13 | 96 | 206 | 161 | 283 | 803 | 25 | 651 | 34 |
| MIN | 4.7 | 13 | 12 | 7.2 | 7.8 | 19 | 18 | 18 | 13 | 2.2 | 1.0 | 3.0 |
| CFSM | 1.99 | 0.56 | 0.59 | 0.24 | 0.79 | 1.18 | 1.27 | 1.59 | 3.07 | 0.21 | 1.26 | 0.22 |
| IN. | 2.29 | 0.63 | 0.68 | 0.28 | 0.82 | 1.36 | 1.42 | 1.83 | 3.42 | 0.24 | 1.45 | 0.24 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 2002, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 31.81 | 22.95 | 16.55 | 25.79 | 58.66 | 37.68 | 63.82 | 44.02 | 71.83 | 15.91 | 14.87 | 11.97 |
| MAX | 77.3 | 40.6 | 23.0 | 67.6 | 111 | 48.8 | 117 | 61.8 | 119 | 35.8 | 48.8 | 19.4 |
| (WY) | 2002 | 2001 | 2002 | 1999 | 2001 | 2001 | 1999 | 2002 | 2002 | 2000 | 2002 | 2000 |
| MIN | 12.7 | 6.82 | 12.0 | 9.37 | 30.3 | 18.8 | 41.3 | 35.5 | 33.2 | 6.40 | 4.02 | 4.14 |
| (WY) | 2001 | 2000 | 2000 | 2002 | 2000 | 2000 | 2000 | 2001 | 1998 | 2001 | 2001 | 1998 |
| SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1998 - 2002 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 13330.8 | 15317.1 | ||||
| ANNUAL MEAN | 36.52 | 41.96 | ||||
| HIGHEST ANNUAL MEAN | 44.2 | 1999 | ||||
| LOWEST ANNUAL MEAN | 24.7 | 2000 | ||||
| HIGHEST DAILY MEAN | 418 | Feb 25 | 803 | Jun 5 | 803 | Jun 5 2002 |
| LOWEST DAILY MEAN | 1.6 | Sep 2 | 1.0 | Aug 11 | 1.0 | Aug 11 2002 |
| ANNUAL SEVEN-DAY MINIMUM | 2.5 | Aug 30 | 1.7 | Aug 6 | 1.7 | Aug 6 2002 |
| MAXIMUM PEAK FLOW | 1650 A | Aug 22 | 1650 A | Aug 22 2002 | ||
| MAXIMUM PEAK STAGE | 8.26 | Aug 22 | 8.26 | Aug 22 2002 | ||
| INSTANTANEOUS LOW FLOW | 0.97 | Aug 11-13 | 0.97 | B | ||
| ANNUAL RUNOFF (CFSM) | 0.94 | 1.08 | ||||
| ANNUAL RUNOFF (INCHES) | 12.75 | 14.65 | ||||
| 10 PERCENT EXCEEDS | 71 | 81 | 75 | |||
| 50 PERCENT EXCEEDS | 23 | 22 | 19 | |||
| 90 PERCENT EXCEEDS | 3.6 | 4.4 | 4.5 | |||