Station list     Available data
ILLINOIS RIVER BASIN


05527950                   MILL CREEK AT OLD MILL CREEK, IL



LOCATION.--Lat 42°24'55", long 87°58'08", in SW1/4SE1/4 sec.32, T.46 N., R.11 E., Lake County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on Hunt Club Road, about 0.5 mi southeast of Old Mill Creek, and at mile 2.9.

DRAINAGE AREA.--61.0 mi2.

PERIOD OF RECORD.--Annual maximum, water years 1962 to 1976. October 1989 to current year.

REVISED RECORDS.--WDR IL-77-1: 1962-76(M). WDR IL-91-2: 1990(P). WDR IL-92-2: 1990.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 668.00 ft above sea level. Prior to Oct. 1, 1989, at datum 8.85 ft higher.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Gage-height telemeter at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 1,160 ft3/s, April 23, 1999, gage height, 12.21 ft; maximum gage height, 12.88 ft, present datum, Mar. 6, 1976; minimum discharge, 0.03 ft3/s, Sept. 7, 8, 10, 11, 1991.

EXTREMES OUTSIDE PERIOD OF RECORD.--A gage height of 13.73 ft, present datum, discharge unknown, occurred between October 1976 and September 1989, from mark on crest-stage gage.
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 1.6 23  15  9.4 214  59  37  181  30  49    1.4 2.4  
2 1.7 21  13  13    252  57  34  151  80  43    1.4 1.9  
3 3.8 18  12  e13    254  63  31  132  71  37    1.3 1.5  
4 4.9 17  12  e13    230  57  32  116  59  31    1.3 1.2  
5 7.2 16  11  e12    185  52  31  102  52  26    1.3 1.1  
 
6 11    14  16  e12    170  51  31  93  45  22    1.3 1.1  
7 11    14  76  e12    158  46  29  85  41  18    1.3 1.0  
8 8.4 13  61  e12    144  45  27  76  36  16    1.3 1.0  
9 6.4 12  54  e12    141  47  93  69  33  15    1.2 1.0  
10 5.4 72  51  e12    132  48  102  61  35  13    1.2 .99
 
11 4.9 84  49  e12    156  45  86  56  33  12    1.1 1.0  
12 4.9 64  46  e13    225  44  78  59  31  11    1.3 1.2  
13 4.5 54  43  e13    161  46  73  53  317  9.4 1.3 1.5  
14 4.3 49  40  e13    144  46  68  46  351  7.2 1.2 1.3  
15 4.2 45  39  e13    133  48  66  42  201  5.9 1.1 1.2  
 
16 4.0 41  38  13    126  60  225  41  165  4.9 1.0 1.3  
17 10    37  35  13    117  127  181  72  142  4.4 1.0 1.3  
18 83    33  32  18    106  127  152  84  121  4.5 1.0 1.3  
19 53    29  30  18    96  104  140  86  103  4.3 1.4 1.3  
20 44    26  28  18    87  94  127  74  86  4.1 1.2 1.3  
 
21 36    23  27  17    78  87  123  65  74  3.5 1.1 1.4  
22 29    21  23  126    71  79  297  67  63  2.7 1.1 1.4  
23 25    20  e19  340    64  71  777  62  54  2.4 1.4 1.4  
24 22    18  17  410    60  64  459  58  49  3.2 5.2 1.4  
25 19    17  16  270    57  58  396  52  43  2.9 8.3 1.3  
 
26 17    16  15  236    55  52  360  46  36  2.4 7.2 1.3  
27 16    15  14  256    58  49  316  46  32  2.1 5.6 1.8  
28 18    14  13  327    60  51  310  44  61  1.7 4.4 39     
29 17    14  13  273    ---  50  256  39  71  1.5 3.4 64     
30 26    14  10  243    ---  46  217  32  54  1.5 2.8 41     
 
31 26    ---  11  229    ---  41  ---  29  ---  1.5 2.7 ---     

TOTAL 529.2 854 879 2991.4 3734 1914 5154 2219 2569 363.1 67.8 179.89
MEAN 17.1 28.5 28.4 96.5 133 61.7 172 71.6 85.6 11.7 2.19 6.00
MAX 83 84 76 410 254 127 777 181 351 49 8.3 64
MIN 1.6 12 10 9.4 55 41 27 29 30 1.5 1.0 .99
CFSM .28 .47 .47 1.58 2.19 1.01 2.82 1.17 1.40 .19 .04 .10
IN. .32 .52 .54 1.83 2.28 1.17 3.15 1.35 1.57 .22 .04 .11

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1999, BY WATER YEAR (WY)
MEAN 9.07 42.4 43.6 54.7 77.7 100 123 87.6 59.6 29.5 10.6 6.74
MAX 34.1 127 106 126 134 157 297 245 188 168 44.0 24.6
(WY) 1991 1993 1992 1993 1997 1993 1993 1996 1996 1993 1990 1992
MIN 1.38 7.59 6.15 8.27 25.2 22.9 28.5 11.9 3.45 1.00 .55 .48
(WY) 1995 1990 1990 1994 1996 1996 1994 1994 1992 1991 1991 1991

SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1990 - 1999
ANNUAL TOTAL 21747.92 21454.39
ANNUAL MEAN 59.6   58.8   53.4  
HIGHEST ANNUAL MEAN 102      1993
LOWEST ANNUAL MEAN 29.3   1994
HIGHEST DAILY MEAN 491          Apr 16 777          Apr 23 777      Apr 23 1999
LOWEST DAILY MEAN .68     Aug 3 .99     Sep 10 .03 Sep 11 1991
ANNUAL SEVEN-DAY MINIMUM .80     Jul 30 1.0       Sep 5 .05 Sep 5 1991
INSTANTANEOUS PEAK FLOW 1160          Apr 23 1160      Apr 23 1999
INSTANTANEOUS PEAK STAGE 12.21     Apr 23 12.21 Apr 23 1999
INSTANTANEOUS LOW FLOW .90     A .03 B
ANNUAL RUNOFF (CFSM) .98 .96 .88
ANNUAL RUNOFF (INCHES) 13.27 13.09 11.91
10 PERCENT EXCEEDS 151      151      141     
50 PERCENT EXCEEDS 32      32      26     
90 PERCENT EXCEEDS 1.7   1.3   2.0  
A - Aug. 18, Sept. 9-11.
B - Sept. 7, 8, 10, 11, 1991.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data