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, 1,090 ft3/s, June 30, 1993, gage height, 12.06 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 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.8 2.7 33  24  63  74  234  97  22    54      .72 1.4  
2 2.4 2.5 27  25  130  70  191  90  20    44      .72 .98
3 1.7 2.3 26  58  126  67  161  84  18    65      .68 1.0  
4 1.5 2.1 32  77  103  63  144  79  17    109      .79 1.1  
5 1.4 2.0 33  116  92  60  128  72  18    61      .97 .99
 
6 1.1 3.1 28  158  86  58  116  67  18    45      2.0   .83
7 1.3 4.4 25  248  91  55  109  134  17    38      15      1.1  
8 1.9 4.2 25  184  87  75  206  178  16    33      34      1.1  
9 2.2 3.6 24  199  83  118  301  140  16    29      18      1.2  
10 1.5 3.3 28  158  80  89  257  123  15    24      12      1.2  
 
11 1.5 3.1 29  e135  154  83  210  109  17    21      7.8   1.1  
12 1.4 2.7 28  e115  291  73  177  99  21    18      5.4   1.0  
13 2.6 2.7 25  103  202  69  149  126  27    15      4.2   1.0  
14 3.3 2.9 23  e96  170  65  142  122  27    14      3.3   1.6  
15 3.2 5.9 23  e88  153  62  135  111  22    12      3.2   8.6  
 
16 2.6 7.2 23  e79  149  58  491  98  17    9.2   3.6   10     
17 2.5 7.2 26  e72  161  64  365  85  14    6.8   3.2   6.1  
18 2.2 6.9 28  67  188  233  321  73  12    5.5   2.7   3.9  
19 2.0 6.6 29  e64  163  243  291  64  16    4.8   2.0   2.7  
20 1.8 6.4 32  60  146  195  260  57  15    4.3   1.8   2.3  
 
21 1.6 7.8 32  57  132  167  287  50  12    3.6   1.7   1.7  
22 1.4 11    32  e52  118  150  267  45  9.5 3.6   1.7   1.6  
23 2.3 12    31  e50  106  142  226  42  7.8 3.1   1.5   1.9  
24 2.2 11    31  e49  97  131  188  42  7.1 2.4   1.5   1.8  
25 2.3 9.8 33  e46  90  116  156  40  7.3 1.7   3.6   1.9  
 
26 3.0 13    32  e47  83  102  150  37  45    1.4   4.5   1.9  
27 8.8 15    29  e48  83  90  137  32  51    1.3   3.2   1.8  
28 9.2 20    27  49  79  82  122  31  84    1.2   3.8   1.6  
29 6.3 21    e26  54  ---  79  112  29  82    1.0   4.5   1.6  
30 4.5 30    25  57  ---  79  103  27  66    .93 4.2   1.7  
 
31 3.3 ---    24  57  ---  140  ---  25  ---    .81 2.4   ---     

TOTAL 85.8 232.4 869 2692 3506 3152 6136 2408 736.7 633.64 154.68 66.70
MEAN 2.77 7.75 28.0 86.8 125 102 205 77.7 24.6 20.4 4.99 2.22
MAX 9.2 30 33 248 291 243 491 178 84 109 34 10
MIN 1.1 2.0 23 24 63 55 103 25 7.1 .81 .68 .83
CFSM .05 .13 .46 1.42 2.05 1.67 3.36 1.27 .40 .34 .08 .04
IN. .05 .14 .53 1.64 2.14 1.92 3.74 1.47 .45 .39 .09 .04

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1998, BY WATER YEAR (WY)
MEAN 8.18 43.9 45.3 50.0 71.6 104 117 89.4 56.7 31.5 11.5 6.83
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 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1990 - 1998
ANNUAL TOTAL 18181.9   20672.92
ANNUAL MEAN 49.8   56.6   52.9  
HIGHEST ANNUAL MEAN 102      1993
LOWEST ANNUAL MEAN 29.3   1994
HIGHEST DAILY MEAN 650          Feb 21 491          Apr 16 758      Feb 20 1994
LOWEST DAILY MEAN 1.1       Oct 6 .68     Aug 3 .03 Sep 11 1991
ANNUAL SEVEN-DAY MINIMUM 1.6       Oct 4 .80     Jul 30 .05 Sep 5 1991
INSTANTANEOUS PEAK FLOW 609          Apr 16 1090      Jun 30 1993
INSTANTANEOUS PEAK STAGE 10.99     Apr 16 12.06 Jun 30 1993
INSTANTANEOUS LOW FLOW .65     Jul 31, Aug 1-4 .03 A
ANNUAL RUNOFF (CFSM) .82 .93 .87
ANNUAL RUNOFF (INCHES) 11.10 12.62 11.78
10 PERCENT EXCEEDS 108      151      140     
50 PERCENT EXCEEDS 28      27      25     
90 PERCENT EXCEEDS 2.5   1.6   2.0  
A - Sept. 7, 8, 10, 11, 1991.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data