Station list     Available data
ILLINOIS RIVER BASIN


05540275       SPRING BROOK AT 87TH STREET NEAR NAPERVILLE, IL



LOCATION.-- Lat 41°43'33", long 88°09'49", in SW1/4SW1/4 sec.36, T.38 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on 87th Street, 3.0 mi south of Naperville, and at mile 2.9.

DRAINAGE AREA.-- 9.90 mi2.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1987 to current year.
 

STAGE: Water years 1994-2001.
SURFACE-WATER QUALITY
 

CHEMICAL: October 1987 to current year.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 647.00 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,750 ft3/s, July 18, 1996, gage height, 10.77 ft; no flow, Oct. 11, 1988.

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.8 1.4 e5.2 e1.9 30    19    4.3 9.0 22    .96 4.4   28   
2 2.1 1.9 e4.5 e1.8 33    17    4.2 7.3 18    .73 3.7   18   
3 1.6 2.2 e3.8 e1.8 18    15    4.2 6.1 12    1.2   3.0   13   
4 17    1.9 e3.3 e1.9 16    14    3.8 5.4 8.9 1.3   2.4   10   
5 8.9 1.6 e3.1 e1.9 15    11    4.3 4.8 24    1.3   1.9   6.7
 
6 7.0 2.9 e2.9 e2.0 14    9.4 13    4.7 37    1.2   1.6   6.6
7 9.1 32    e2.8 e2.0 12    8.2 14    5.6 28    1.2   1.4   17   
8 9.6 16    e2.7 e2.0 22    7.1 9.7 5.8 20    1.3   1.2   10   
9 7.6 49    e2.7 e2.0 180    6.1 14    4.8 10    1.2   1.1   17   
10 6.2 54    e2.5 e2.0 85    5.5 18    5.5 7.6 1.0   1.4   16   
 
11 5.2 34    e2.2 e2.1 40    5.6 19    13    5.9 .80 1.2   11   
12 4.5 24    e2.0 e3.0 31    6.5 20    9.9 6.8 .61 .96 7.8
13 3.9 23    e1.9 7.4 27    7.7 11    6.7 6.8 .47 .73 4.4
14 3.1 19    e2.0 12    31    6.9 8.2 6.6 5.4 .33 .53 2.9
15 3.1 15    e2.1 17    30    13    25    5.5 4.9 .31 .46 2.2
 
16 2.6 13    e2.2 16    26    26    26    4.8 4.0 .31 3.0   1.9
17 2.6 11    e2.2 15    e22    27    21    4.1 3.5 .32 3.7   1.7
18 2.4 8.9 e2.1 13    e19    26    17    4.7 3.1 .40 3.6   1.6
19 2.2 7.3 e2.0 12    16    22    14    3.3 2.8 .40 4.2   51   
20 1.8 5.8 e1.9 9.4 15    18    18    2.9 2.3 .38 3.4   46   
 
21 1.9 5.7 e1.9 e7.5 e13    13    49    4.0 2.4 .46 2.8   41   
22 1.9 5.7 e1.9 e6.4 10    10    43    5.0 2.3 6.8   3.2   31   
23 1.9 3.6 e1.9 e5.8 8.9 8.9 42    4.7 2.2 16      3.0   34   
24 2.0 3.1 e1.8 e5.0 30    7.7 48    4.3 2.1 9.7   2.7   45   
25 2.2 3.2 e1.7 e5.0 54    6.5 38    4.8 1.6 45      20      34   
 
26 2.6 7.3 e1.8 e5.0 32    5.5 32    12    1.6 44      41      27   
27 2.0 7.7 e1.8 e5.2 27    5.1 27    25    1.6 27      22      21   
28 1.7 6.7 e1.8 e5.6 21    4.8 22    15    1.3 16      12      16   
29 1.6 6.6 e1.8 8.8 ---    4.5 14    10    1.3 9.2   8.7   14   
30 1.6 6.0 e1.9 42    ---    4.3 11    7.1 1.1 6.1   4.7   11   
 
31 1.6 ---    e1.9 35    ---    4.2 ---    7.0 ---    5.3   34      ---   

TOTAL 124.3 379.5 74.3 257.5 877.9 345.5 594.7 219.4 250.5 201.28 197.98 546.8
MEAN 4.01 12.6 2.40 8.31 31.4 11.1 19.8 7.08 8.35 6.49 6.39 18.2
MAX 17 54 5.2 42 180 27 49 25 37 45 41 51
MIN 1.6 1.4 1.7 1.8 8.9 4.2 3.8 2.9 1.1 .31 .46 1.6
CFSM .41 1.28 .24 .84 3.17 1.13 2.00 .71 .84 .66 .65 1.84
IN. .47 1.43 .28 .97 3.30 1.30 2.23 .82 .94 .76 .74 2.05
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2001, BY WATER YEAR (WY)
MEAN 4.73 10.3 8.28 11.6 13.0 12.9 17.4 14.7 12.6 11.7 6.45 6.05
MAX 18.2 20.1 22.6 30.7 44.3 26.1 34.0 46.3 31.3 78.1 27.6 18.2
(WY) 1999 1993 1988 1993 1997 1990 1993 1990 1993 1996 1998 2001
MIN .70 .58 .69 2.34 3.22 2.36 4.03 1.57 .78 .39 .22 .36
(WY) 1993 2000 1990 2000 1996 2000 1989 1989 1988 1988 1991 1988

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1988 - 2001
ANNUAL TOTAL 3800.38 4069.66
ANNUAL MEAN 10.4   11.1   10.8  
HIGHEST ANNUAL MEAN 15.7   1993
LOWEST ANNUAL MEAN 6.40 1994
HIGHEST DAILY MEAN 144          Apr 21 180          Feb 9 1370      Jul 18 1996
LOWEST DAILY MEAN .34     Mar 14 .31     Jul 15,16 .00 Oct 11 1988
ANNUAL SEVEN-DAY MINIMUM .58     Mar 9 .35     Jul 14 .05 Oct 9 1988
MAXIMUM PEAK FLOW 208          Feb 9 1750      Jul 18 1996
MAXIMUM PEAK STAGE 6.25     Feb 9 10.77 Jul 18 1996
INSTANTANEOUS LOW FLOW .18     Jul 14,16,17
ANNUAL RUNOFF (CFSM) 1.05 1.13 1.09
ANNUAL RUNOFF (INCHES) 14.28 15.29 14.81
10 PERCENT EXCEEDS 27      28      27     
50 PERCENT EXCEEDS 4.2   5.7   5.2  
90 PERCENT EXCEEDS 1.6   1.6   .75



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data