Station list     Available data
ILLINOIS RIVER BASIN


05540160                   EAST BRANCH DU PAGE RIVER NEAR DOWNERS GROVE, IL



LOCATION.--Lat 41°49'54", long 88°02'51", in SE1/4SW1/4 sec.25, T.39 N., R.10 E., Du Page County, Hydrologic Unit 07120004, on upstream side of bridge on State Highway 56, 2.2 mi northwest of Downers Grove, and at mile 15.0.

DRAINAGE AREA.--26.6 mi2.

PERIOD OF RECORD.--Annual maximum, water years 1961-76. October 1989 to current year.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 660.00 ft above sea level. Prior to July 19, 1989, at datum 12.21 ft higher.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station. Gage-height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
134 41 46 28 74 53 29 85 60 86 24 20 
238 38 37 28 103 51 29 66 151 64 24 19 
356 27 34 e28 97 54 29 57 91 48 23 19 
435 33 32 e28 81 53 32 49 57 46 23 19 
572 35 31 29 66 32 29 45 46 38 22 18 
 
673 32 76 30 59 48 31 43 43 34 22 18 
753 31 151 28 54 47 28 53 42 31 26 18 
851 32 89 28 50 43 36 45 35 29 25 18 
923 34 61 30 47 45 181 38 32 58 24 18 
1027 218 52 29 44 47 125 36 31 47 23 18 
 
1128 157 46 29 59 50 90 44 60 37 23 17 
1227 91 45 28 79 50 68 270 75 33 30 20 
1326 71 42 27 58 53 48 184 218 29 29 22 
1425 55 39 27 48 52 40 109 297 28 26 21 
1525 47 38 28 46 58 60 69 149 27 24 20 
 
1625 44 37 30 42 79 234 55 91 28 24 18 
17164 36 36 47 39 123 173 123 67 34 23 18 
18457 26 36 80 38 114 118 118 53 32 23 18 
19270 32 35 56 36 76 85 76 45 32 37 19 
20116 32 34 46 34 62 68 53 40 31 31 20 
 
2179 32 34 54 32 54 62 69 38 37 27 18 
2258 32 33 332 31 47 112 223 59 42 25 18 
2350 31 32 450 30 42 451 170 56 36 30 18 
2443 29 32 431 30 39 304 128 63 37 38 18 
2539 31 31 238 25 37 170 88 40 34 37 17 
 
2628 31 31 140 33 34 115 61 36 31 32 18 
2743 29 31 121 79 26 150 49 104 29 25 26 
2871 29 32 128 70 30 304 43 75 27 23 111 
2948 29 32 95 --- 32 194 38 54 27 22 108 
3056 54 30 77 --- 28 122 35 44 26 21 64 
 
3148 --- 30 72 --- 30 --- 34 --- 25 20 --- 

TOTAL2188143913452822148415893517255622521143806794
MEAN70.648.043.491.053.051.311782.575.136.926.026.5
MAX4572181514501031234512702978638111
MIN232630272526283431252017
CFSM2.651.801.633.421.991.934.413.102.821.39.98.99
IN.3.062.011.883.952.082.224.923.573.151.601.131.11

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1999, BY WATER YEAR (WY)
MEAN36.252.439.252.654.659.774.969.657.737.739.731.3
MAX70.692.856.210013887.813912197.296.563.449.6
(WY)199919911991199319971993199319901993199619981993
MIN18.521.816.325.428.929.933.322.221.519.918.419.7
(WY)199019901990199419961996199019921992199119911995

SUMMARY STATISTICSFOR 1998 CALENDAR YEARFOR 1999 WATER YEARWATER YEARS 1990 - 1999
ANNUAL TOTAL21895     21935     
ANNUAL MEAN60.0  60.1  50.4      
HIGHEST ANNUAL MEAN64.1      1993
LOWEST ANNUAL MEAN38.5      1994
HIGHEST DAILY MEAN499         May 8457         Oct 18853         Jul 18 1996
LOWEST DAILY MEAN15         Mar 717         Sep 11,2511         A
ANNUAL SEVEN-DAY MINIMUM21         Jul 2718         Sep 512         Aug 14 1992
INSTANTANEOUS PEAK FLOW517         Jan 23936         Jul 18 1996
INSTANTANEOUS PEAK STAGE14.01    Jan 2316.13 BJul 18 1996
INSTANTANEOUS LOW FLOW12         Sep 23,253.6      Dec 19 1989
ANNUAL RUNOFF (CFSM)2.262.261.89    
ANNUAL RUNOFF (INCHES)30.6230.6825.75    
10 PERCENT EXCEEDS117     118     95         
50 PERCENT EXCEEDS41     38     32         
90 PERCENT EXCEEDS25     23     18         
A - Aug. 19, Oct. 7, 1992.
B - From floodmark.


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Surface-Water Data

Ground-Water Data

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