Station list     Available data
ILLINOIS RIVER BASIN


05540091       SPRING BROOK AT FOREST PRESERVE NEAR WARRENVILLE, IL



LOCATION.-- Lat 41°50'07", long 88°10'58", in SW1/4SW1/4 sec.26, T.39 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank on upstream side of footbridge in Roy C. Blackwell Forest Preserve, 0.7 mi upstream from the confluence with the West Branch Du Page River and 1 mi northwest of Warrenville.

DRAINAGE AREA.-- 6.83 mi2.

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

DISCHARGE: October 1991 to current year.
 

STAGE: Water years 1994-2001.

GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 690.15 ft above sea level.

REMARKS.-- Effluent from sewage-treatment plant 3 mi upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 393 ft3/s, July 18, 1996, gage height, 12.60 ft; no flow, Nov. 25, 1999.

REMARKS FOR CURRENT YEAR.-- Records good 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 9.0 7.1 8.9 7.5 23  24  15  15    30    9.0 7.0 12   
2 8.2 8.4 8.5 7.9 20  22  15  15    28    7.6 13    8.1
3 9.4 8.7 8.5 7.8 17  20  15  14    19    7.0 12    8.0
4 39    7.4 8.6 7.7 16  19  14  13    16    8.0 8.0 9.0
5 20    7.4 8.4 7.9 15  18  15  12    52    9.0 6.9 7.3
 
6 17    9.7 8.1 8.0 14  16  41  11    35    6.8 7.1 8.4
7 13    45    e8.0 8.2 14  15  28  15    28    8.6 6.8 27   
8 11    18    e8.0 8.4 21  15  24  15    25    9.2 6.8 13   
9 11    64    7.9 8.0 143  14  24  12    21    e7.0 5.0 14   
10 11    36    7.9 7.9 48  14  21  e10    19    e6.2 12    15   
 
11 10    21    8.9 8.2 31  15  21  e21    18    e5.4 7.5 10   
12 8.8 17    8.3 8.0 29  17  30  e19    29    e6.5 4.6 8.7
13 9.9 18    7.9 8.3 27  19  22  e17    22    5.1 6.7 8.7
14 9.7 16    7.8 12    34  16  20  e15    17    6.8 7.5 7.6
15 9.4 13    7.7 20    32  25  28  14    16    6.4 6.0 6.1
 
16 9.7 12    e7.8 21    26  37  25  12    15    5.5 18    5.2
17 9.6 11    e7.8 18    22  33  23  10    13    6.1 13    7.9
18 9.4 9.9 e7.9 16    22  30  21  9.7 15    6.0 9.2 8.2
19 9.5 9.5 7.9 e15    21  28  19  7.9 15    7.0 11    89   
20 9.2 9.7 7.6 e13    19  26  27  8.5 13    7.5 8.8 29   
 
21 8.3 9.0 7.4 13    18  24  32  13    12    7.8 8.0 45   
22 9.0 8.7 7.4 12    16  23  28  13    12    34    8.2 25   
23 8.4 8.3 7.2 12    16  20  38  11    12    24    9.2 51   
24 7.9 7.6 7.5 11    53  18  34  11    11    14    8.4 43   
25 9.4 7.8 6.9 11    61  17  27  20    10    22    17    26   
 
26 8.9 14    7.1 10    32  16  24  29    8.1 17    20    21   
27 8.9 12    7.4 10    27  15  21  31    8.3 10    12    19   
28 8.1 9.8 7.5 10    26  15  19  19    8.2 8.5 9.5 18   
29 7.8 9.9 7.5 13    ---  15  19  15    8.1 9.4 8.9 16   
30 7.9 9.7 7.4 43    ---  14  17  13    7.5 8.8 7.9 13   
 
31 7.5 ---    7.5 31    ---  14  ---  14    ---    6.6 20    ---   

TOTAL 335.9 445.6 243.2 394.8 843 614 707 455.1 543.2 302.8 306.0 579.2
MEAN 10.8 14.9 7.85 12.7 30.1 19.8 23.6 14.7 18.1 9.77 9.87 19.3
MAX 39 64 8.9 43 143 37 41 31 52 34 20 89
MIN 7.5 7.1 6.9 7.5 14 14 14 7.9 7.5 5.1 4.6 5.2
CFSM 1.59 2.17 1.15 1.86 4.41 2.90 3.45 2.15 2.65 1.43 1.45 2.83
IN. 1.83 2.43 1.32 2.15 4.59 3.34 3.85 2.48 2.96 1.65 1.67 3.15
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1992 - 2001, BY WATER YEAR (WY)
MEAN 11.5 14.2 12.0 16.4 17.0 18.0 23.3 17.4 18.4 12.3 11.8 11.6
MAX 24.8 20.9 17.9 29.5 35.4 28.5 34.4 26.7 30.2 29.6 17.4 19.3
(WY) 1999 1995 1993 1993 1997 1998 1993 1996 1993 1996 1997 2001
MIN 7.35 6.49 7.72 8.92 7.37 10.1 8.35 6.98 7.41 8.44 7.33 6.60
(WY) 1995 1994 1994 1994 1996 2000 1994 1994 1992 1995 1999 1995

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1992 - 2001
ANNUAL TOTAL 5042.3   5769.8  
ANNUAL MEAN 13.8   15.8   15.3  
HIGHEST ANNUAL MEAN 18.8   1993
LOWEST ANNUAL MEAN 11.3   1994
HIGHEST DAILY MEAN 162          Apr 20 143          Feb 9 309      Jul 18 1996
LOWEST DAILY MEAN 4.2       Sep 2 4.6       Aug 12 3.8   Nov 25 1999
ANNUAL SEVEN-DAY MINIMUM 5.5       Aug 28 6.0       Jul 11 4.6   Nov 5 1993
MAXIMUM PEAK FLOW 177          Feb 9 393      Jul 18 1996
MAXIMUM PEAK STAGE 10.43     Feb 9 12.60 Jul 18 1996
INSTANTANEOUS LOW FLOW 2.4       Aug 12 .00 Nov 25 1999
ANNUAL RUNOFF (CFSM) 2.02 2.31 2.24
ANNUAL RUNOFF (INCHES) 27.46 31.43 30.42
10 PERCENT EXCEEDS 22      28      28     
50 PERCENT EXCEEDS 10      12      11     
90 PERCENT EXCEEDS 7.1   7.5   6.5  



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data