Station list     Available data
ILLINOIS RIVER BASIN


05540275                   SPRING BROOK AT 87TH STREET NEAR NAPERVILLE, IL



LOCATION.--Lat 41°43'33", long 88°09'46", 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.--October 1987 to current year.

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

REMARKS.--Records good except those for February 26-27 and March 17-25, which are fair; and those for estimated daily discharges, which are poor. Gage-height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 5.0 8.2 e9.0 e2.6 28    e15    5.0 27    8.5 7.8   2.3 2.5  
2 4.8 7.0 e7.0 e2.9 30    e13    4.9 19    54    7.7   1.8 1.9  
3 8.9 5.7 e6.2 e2.8 27    e17    4.6 16    37    6.5   1.6 1.4  
4 10    5.3 e5.8 e2.7 21    e15    4.5 15    25    5.6   1.5 1.0  
5 17    5.7 e5.6 e2.7 17    e14    4.3 14    16    4.4   1.2 .83
 
6 18    5.5 15    e2.8 15    e12    4.1 16    11    3.3   1.2 .72
7 16    5.8 42    e2.8 12    e16    3.7 16    8.8 2.3   1.3 .71
8 12    6.0 23    e2.7 9.5 e15    4.2 13    7.3 2.1   1.4 .68
9 10    6.6 15    e2.6 8.6 e13    18    9.4 5.9 2.1   1.2 .63
10 8.3 57    9.5 e2.5 7.6 e15    13    7.6 5.0 2.4   1.2 .61
 
11 6.5 44    7.3 e2.4 11    e13    13    8.1 9.3 1.6   1.1 .59
12 5.5 30    6.4 e2.3 20    e14    11    43    33    1.3   1.8 .71
13 5.0 18    5.5 e2.2 14    e15    11    35    51    1.2   2.8 .87
14 4.6 12    4.7 e2.2 13    e13    12    24    55    1.1   2.6 .57
15 4.4 e12    e4.2 e2.3 11    e12    15    17    36    .90 2.2 .52
 
16 3.8 e10    e3.5 e3.0 10    e19    54    14    23    .83 1.8 .48
17 30    e8.4 e3.2 e3.5 9.3 34    45    36    16    1.1   1.5 .40
18 126    e7.6 e3.0 e8.6 8.4 29    34    39    14    1.6   1.3 .34
19 74    e6.8 e2.9 e6.2 8.0 22    29    27    8.3 2.6   4.8 .32
20 41    e6.0 e2.7 8.1 7.9 15    19    18    6.3 5.6   4.8 .62
 
21 27    e5.6 e2.6 8.9 8.8 8.8 18    17    5.2 13      3.8 .37
22 20    e5.8 e2.5 93    8.6 9.5 21    50    6.2 8.0   3.1 .40
23 16    e5.4 e2.4 160    9.0 7.3 56    35    9.0 7.8   2.7 .42
24 13    e5.0 e2.4 137    9.0 7.8 36    29    27    34      4.9 .40
25 11    e4.8 e2.3 79    8.4 9.2 30    19    21    24      42    .26
 
26 8.8 e4.8 e2.4 51    9.7 8.1 22    13    14    14      37    .28
27 9.5 e4.7 e2.4 45    20    6.9 74    11    10    11      20    1.0  
28 15    e4.5 e2.5 43    e18    6.6 112    9.7 6.5 9.1   12    23     
29 9.8 e4.6 e2.6 36    ---    6.2 60    8.3 4.8 4.4   9.9 26     
30 13    e10    e2.7 33    ---    5.8 37    7.0 3.6 3.1   8.0 20     
 
31 10    ---    e2.5 30    ---    5.6 ---    6.2 ---    2.5   4.1 ---     

TOTAL 563.9 322.8 208.8 783.8 379.8 412.8 775.3 619.3 537.7 192.93 186.9 88.53
MEAN 18.2 10.8 6.74 25.3 13.6 13.3 25.8 20.0 17.9 6.22 6.03 2.95
MAX 126 57 42 160 30 34 112 50 55 34 42 26
MIN 3.8 4.5 2.3 2.2 7.6 5.6 3.7 6.2 3.6 .83 1.1 .26
CFSM 1.84 1.09 .68 2.55 1.37 1.35 2.61 2.02 1.81 .63 .61 .30
IN. 2.12 1.21 .78 2.95 1.43 1.55 2.91 2.33 2.02 .72 .70 .33

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 1999, BY WATER YEAR (WY)
MEAN 4.85 11.0 9.08 12.6 12.1 13.9 16.8 15.0 12.0 11.9 6.34 4.91
MAX 18.2 20.1 22.6 30.7 44.3 26.1 34.0 46.3 31.3 78.1 27.6 13.6
(WY) 1999 1993 1988 1993 1997 1990 1993 1990 1993 1996 1998 1989
MIN .70 1.25 .69 4.40 3.22 4.07 4.03 1.57 .78 .39 .22 .36
(WY) 1993 1990 1990 1994 1996 1996 1989 1989 1988 1988 1991 1988

SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1988 - 1999
ANNUAL TOTAL 5737.2   5072.56
ANNUAL MEAN 15.7   13.9   10.9  
HIGHEST ANNUAL MEAN 15.7   1993
LOWEST ANNUAL MEAN 6.40 1994
HIGHEST DAILY MEAN 230          Aug 4,5 160          Jan 23 1370      Jul 18 1996
LOWEST DAILY MEAN 1.4       Sep 24,25,27 .26     Sep 25 .00 Oct 11 1988
ANNUAL SEVEN-DAY MINIMUM 1.5       Sep 22 .39     Sep 20 .05 Oct 9 1988
INSTANTANEOUS PEAK FLOW 218          Jan 23 1750      Jul 18 1996
INSTANTANEOUS PEAK STAGE 6.28     Jan 23 10.77 Jul 18 1996
INSTANTANEOUS LOW FLOW .21     Sep 25
ANNUAL RUNOFF (CFSM) 1.59 1.40 1.10
ANNUAL RUNOFF (INCHES) 21.56 19.06 14.91
10 PERCENT EXCEEDS 34      34      27     
50 PERCENT EXCEEDS 8.5   8.2   5.3  
90 PERCENT EXCEEDS 2.5   1.3   .74


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data