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.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1987 to current year.
 

STAGE: Water years 1994-2000.
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.

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 14      .88 .25 e2.5 e1.8 4.5   3.2 6.3 39      7.3 18    1.0  
2 9.4   .71 .31 e2.5 e1.8 2.5   3.3 5.9 31      6.3 18    .91
3 14      .73 .56 e3.0 e1.8 1.8   3.4 5.0 19      35    13    .69
4 22      .76 .19 e3.7 e1.8 1.6   3.3 4.7 15      32    11    .64
5 11      .91 29      e3.3 e1.8 1.3   3.6 4.4 16      21    12    .65
 
6 8.1   .83 20      e3.0 e1.7 1.2   3.6 4.7 9.9   14    17    .56
7 6.2   .74 11      e3.0 e1.6 1.1   4.5 5.3 6.1   11    27    .57
8 4.7   .62 8.6   e2.8 e1.5 1.2   6.8 5.2 4.0   7.9 16    .69
9 3.8   .71 7.1   e2.5 e1.6 .99 6.5 30    2.4   6.6 16    .76
10 3.3   .61 5.4   e4.5 e1.9 .62 5.4 41    .90 54    11    1.1  
 
11 2.6   .76 e3.5   e5.0 e2.7 .50 5.6 34    2.7   48    7.2 3.4  
12 2.1   .79 e3.2   e2.9 e2.5 .41 5.1 43    38      34    5.6 38     
13 2.1   .61 e3.0   e2.7 e2.3 .41 5.5 88    53      26    4.3 11     
14 1.9   .52 e2.9   e1.9 e2.1 .34 5.2 44    70      19    3.7 14     
15 1.6   .52 e3.0   e1.8 e2.0 .78 5.0 27    64      18    2.9 14     
 
16 1.8   .57 e3.3   e1.8 e2.0 2.6   7.9 22    44      16    2.3 8.9  
17 1.9   .60 e3.0   e1.8 e2.1 1.2   39    18    35      15    9.8 6.4  
18 1.4   .63 e3.0   e1.7 e2.2 .56 14    23    26      14    12    3.6  
19 1.2   .45 e3.0   e1.7 e2.3 1.2   23    37    18      12    9.0 2.5  
20 1.2   .21 e3.1   e1.6 e2.5 5.2   114    27    16      11    7.0 2.6  
 
21 1.3   .17 e2.9   e1.6 e2.0 6.8   144    18    15      9.4 3.9 3.1  
22 1.1   .25 e2.8   e1.6 e8.1 5.4   80    21    10      7.6 3.1 6.9  
23 .85 .96 e2.7   e1.6 e14    4.0   44    16    8.3   6.9 2.7 21     
24 .81 .67 e2.7   e1.6 26    3.5   35    11    19      5.6 1.9 29     
25 .84 .42 e2.4   e1.6 26    3.0   24    6.3 65      5.5 1.5 18     
 
26 .70 .41 e2.4   e1.7 18    2.8   15    2.3 40      4.5 1.3 12     
27 .33 .41 e2.4   e1.7 14    3.6   13    2.2 27      4.1 1.3 8.7  
28 .39 .31 e2.5   e1.7 10    4.4   11    4.8 19      4.1 1.1 6.8  
29 .41 .32 e2.6   e1.8 6.9 3.8   9.5 2.6 15      3.7 1.0 4.9  
30 .38 .26 e2.6   e1.9 ---    3.0   6.3 1.8 9.0   8.9 1.9 3.8  
 
31 .51 ---      e2.5   e1.9 ---    2.7   ---    15    ---      10    1.3 ---     

TOTAL 121.92 17.34 141.91 72.4 165.0 73.01 649.7 576.5 737.30 478.4 243.8 226.17
MEAN 3.93 .58 4.58 2.34 5.69 2.36 21.7 18.6 24.6 15.4 7.86 7.54
MAX 22 .96 29 5.0 26 6.8 144 88 70 54 27 38
MIN .33 .17 .19 1.6 1.5 .34 3.2 1.8 .90 3.7 1.0 .56
CFSM .40 .06 .46 .24 .57 .24 2.19 1.88 2.48 1.56 .79 .76
IN. .46 .07 .53 .27 .62 .27 2.44 2.17 2.77 1.80 .92 .85

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2000, BY WATER YEAR (WY)
MEAN 4.78 10.2 8.74 11.8 11.6 13.0 17.2 15.3 13.0 12.1 6.46 5.11
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 .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 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1988 - 2000
ANNUAL TOTAL 4258.23 3503.45
ANNUAL MEAN 11.7   9.57 10.8  
HIGHEST ANNUAL MEAN 15.7   1993
LOWEST ANNUAL MEAN 6.40 1994
HIGHEST DAILY MEAN 160          Jan 23 144          Apr 21 1370      Jul 18 1996
LOWEST DAILY MEAN .17     Nov 21 .17     Nov 21 .00 Oct 11 1988
ANNUAL SEVEN-DAY MINIMUM .31     Nov 28 .31     Nov 28 .05 Oct 9 1988
INSTANTANEOUS PEAK FLOW 178          Apr 20 1750      Jul 18 1996
INSTANTANEOUS PEAK STAGE 6.02     Apr 20 10.77 Jul 18 1996
INSTANTANEOUS LOW FLOW .00     Dec 4
ANNUAL RUNOFF (CFSM) 1.18 .97 1.09
ANNUAL RUNOFF (INCHES) 16.00 13.16 14.77
10 PERCENT EXCEEDS 30      26      27     
50 PERCENT EXCEEDS 5.8   3.4   5.2  
90 PERCENT EXCEEDS .61 .65 .73


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data