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.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1989 to current year.
 

STAGE: Water years 1994-2000.
 

PARTIAL RECORD: Annual maximum, water years 1962 to 1976.

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

GAGE.-- Water-stage recorder, phone telemeter, 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.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: A gage height of 13.73 ft, present datum, discharge unknown, occurred between October 1976 and September 1989, from mark on crest-stage gage.

REMARKS FOR CURRENT YEAR.-- Records good 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 21      1.3   2.4 3.5 e5.2 77  19  89  222  81  55    7.2
2 14      .81 2.1 4.4 e5.0 70  18  77  410  68  42    7.0
3 10      1.1   2.5 5.8 e4.8 65  18  66  293  145  34    7.0
4 22      1.2   3.6 7.0 e4.7 60  17  58  256  122  32    6.9
5 17      .97 19    6.2 e4.6 57  16  51  302  105  29    6.7
 
6 14      .93 25    5.5 e4.6 54  14  44  254  93  37    6.7
7 11      .94 17    4.9 e4.6 48  15  39  201  79  36    6.7
8 9.3   1.0   13    4.6 e4.4 39  25  35  162  70  30    6.7
9 9.1   1.8   12    5.9 4.3 35  31  44  136  62  26    6.7
10 7.7   2.1   12    9.5 e4.4 33  32  82  118  e120  21    6.5
 
11 5.7   1.7   11    12    e4.5 31  29  82  112  111  19    6.9
12 3.8   1.5   10    12    e4.6 29  26  90  523  96  16    28   
13 3.7   1.2   9.7 11    e4.8 25  23  75  707  86  15    20   
14 3.5   .95 8.6 8.1 e4.9 22  21  64  605  90  15    22   
15 3.1   .97 8.2 9.4 e4.9 22  20  59  532  79  13    24   
 
16 3.0   1.0   9.3 e7.4 e4.9 23  18  53  e450  64  11    17   
17 3.0   2.2   9.6 6.9 5.2 21  26  51  e390  54  15    14   
18 3.0   3.3   7.7 e6.5 8.1 20  24  358  e334  45  17    12   
19 2.9   4.6   e6.4 e6.4 8.8 20  51  536  e290  38  15    10   
20 2.6   4.5   e5.4 e6.2 9.2 42  404  358  267  36  14    10   
 
21 2.3   4.4   e4.6 e6.0 9.4 56  509  321  221  37  12    13   
22 2.1   4.4   e4.0 e5.9 18    48  370  284  179  30  11    23   
23 2.1   5.1   e3.5 e5.8 84    43  344  245  152  34  14    122   
24 2.0   6.8   e3.3 e5.8 158    42  311  206  144  31  13    96   
25 1.7   6.5   3.2 e5.8 158    42  263  167  150  25  11    81   
 
26 .95 4.2   3.1 e5.6 120    37  222  143  136  19  9.6 69   
27 1.3   3.9   3.1 e5.4 111    45  173  139  126  16  9.6 57   
28 1.9   3.8   3.1 e5.2 101    42  139  161  114  18  9.4 44   
29 2.0   3.7   3.3 e5.1 87    35  119  164  104  21  8.5 32   
30 2.4   3.0   3.7 e5.2 ---    28  102  139  93  21  7.7 27   
 
31 1.7   ---      3.6 e5.3 ---    22  ---  137  ---  34  7.5 ---   

TOTAL 189.85 79.87 233.0 204.3 952.9 1233 3399 4417 7983 1930 605.3 796.0
MEAN 6.12 2.66 7.52 6.59 32.9 39.8 113 142 266 62.3 19.5 26.5
MAX 22 6.8 25 12 158 77 509 536 707 145 55 122
MIN .95 .81 2.1 3.5 4.3 20 14 35 93 16 7.5 6.5
CFSM .10 .04 .12 .11 .54 .65 1.86 2.34 4.37 1.02 .32 .44
IN. .12 .05 .14 .12 .58 .75 2.07 2.70 4.87 1.18 .37 .49

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2000, BY WATER YEAR (WY)
MEAN 8.80 38.8 40.3 50.3 73.5 94.5 122 92.6 78.4 32.5 11.4 8.54
MAX 34.1 127 106 126 134 157 297 245 266 168 44.0 26.5
(WY) 1991 1993 1992 1993 1997 1993 1993 1996 2000 1993 1990 2000
MIN 1.38 2.66 6.15 6.59 25.2 22.9 28.5 11.9 3.45 1.00 .55 .48
(WY) 1995 2000 1990 2000 1996 1996 1994 1994 1992 1991 1991 1991

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1990 - 2000
ANNUAL TOTAL 19694.91 22023.22
ANNUAL MEAN 54.0   60.2   54.1  
HIGHEST ANNUAL MEAN 102      1993
LOWEST ANNUAL MEAN 29.3   1994
HIGHEST DAILY MEAN 777          Apr 23 707          Jun 13 777      Apr 23 1999
LOWEST DAILY MEAN .81     Nov 2 .81     Nov 2 .03 Sep 11 1991
ANNUAL SEVEN-DAY MINIMUM .99     Nov 2 .99     Nov 2 .05 Sep 5 1991
INSTANTANEOUS PEAK FLOW 1060          May 18 1160      Apr 23 1999
INSTANTANEOUS PEAK STAGE 12.01     May 18 12.21 Apr 23 1999
INSTANTANEOUS LOW FLOW .73     Oct 26, Nov 2 .03 A
ANNUAL RUNOFF (CFSM) .89 .99 .89
ANNUAL RUNOFF (INCHES) 12.02 13.44 12.05
10 PERCENT EXCEEDS 151      161      142     
50 PERCENT EXCEEDS 14      18      25     
90 PERCENT EXCEEDS 1.3   3.0   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