Station list     Available data
ILLINOIS RIVER BASIN


05533400                         SAWMILL CREEK NEAR LEMONT, IL



LOCATION.--Lat 41°42'28", long 87°57'45", in NE1/4SW1/4 sec.10, T.37 N., R.11 E., Du Page County, Hydrologic Unit 07120004, on concrete abutment on right bank, 50 ft upstream from bridge on Bluff Road at south edge of Argonne National Laboratory, 2.5 mi northeast of Lemont, and at mile 1.

DRAINAGE AREA.--13.0 mi2

PERIOD OF RECORD.--Annual maximum, water years 1961-79. December 1985 to current year

REVISED RECORDS.--WDR IL-77-1: 1961-76(M).

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 630.00 ft above sea level. Oct. 11, 1961, to Sept. 30, 1976, crest-stage gage on bridge 50 ft downstream at datum 11.22 ft higher.

REMARKS.--Records good except those for Jan. 5 to Sept. 30, which are fair, and those for estimated daily discharges, which are poor. Gage-height telemeter and recording rain gage at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 3,070 ft3/s, July 18, 1996, gage height 17.53 ft.
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 .08 1.7 3.0 2.4 19    6.0 56    9.0 1.6   3.3   .12 1.9
2 .10 1.7 2.5 5.6 36    5.4 44    6.7 1.4   2.7   .13 1.7
3 .16 1.8 2.7 15    19    5.7 23    5.8 2.8   14      .73 2.7
4 .36 2.2 2.5 53    13    10    14    7.5 2.4   49      481      2.1
5 .43 1.7 2.2 67    9.4 8.9 10    10    1.8   9.6   160      1.6
 
6 .22 3.9 2.0 58    8.1 7.3 8.7 15    1.6   4.8   51      2.2
7 .31 2.5 1.8 38    7.3 6.3 12    384    1.3   130      43      160   
8 .31 2.1 1.8 59    6.6 50    62    140    .56 36      28      27   
9 .91 1.7 2.0 52    5.9 70    53    50    31      14      13      9.4
10 1.0   1.5 5.1 25    6.6 41    25    27    10      7.3   8.4   5.2
 
11 .61 1.5 5.9 17    58    25    15    15    90      4.9   5.9   4.1
12 .18 1.4 3.8 11    39    16    11    9.6 39      3.9   4.7   3.7
13 3.3   1.3 2.7 8.3 19    13    17    23    11      3.4   4.1   3.1
14 2.1   1.3 2.4 7.6 13    13    24    10    5.8   3.1   3.8   7.9
15 1.2   2.8 2.5 6.6 10    11    12    6.3 4.4   2.8   3.5   22   
 
16 .94 3.3 2.7 6.1 11    12    11    4.8 3.7   2.5   3.2   7.4
17 .62 e2.2 2.6 e6.0 30    69    8.1 4.0 3.5   2.1   2.9   4.9
18 .43 1.6 2.4 e5.7 36    167    6.5 3.6 6.4   2.1   2.6   3.7
19 .32 1.7 2.4 e5.1 19    74    5.7 3.3 12      8.2   2.3   3.2
20 .25 1.6 2.2 4.7 15    39    20    3.2 3.8   3.3   2.1   3.5
 
21 .20 2.1 2.0 4.3 11    23    36    3.1 3.0   2.8   2.4   3.2
22 .15 1.7 3.0 4.4 9.0 16    22    2.6 2.3   3.8   2.2   2.4
23 .15 1.4 2.9 4.8 8.2 12    11    2.4 1.9   2.7   2.3   2.1
24 1.0   1.3 4.3 4.7 11    9.5 8.5 15    1.6   1.9   14      1.9
25 1.6   1.5 17    4.3 7.9 8.2 8.0 4.4 1.4   1.6   8.0   2.0
 
26 13      1.8 7.9 4.2 6.9 7.9 20    3.2 130      1.3   3.5   1.9
27 28      11    4.3 4.5 7.7 6.8 16    2.6 29      1.2   2.7   2.6
28 3.9   15    3.2 5.3 6.2 14    8.4 5.0 13      .99 10      2.1
29 2.5   8.2 3.1 9.0 ---    7.9 22    3.6 6.5   .53 4.1   1.7
30 2.2   4.7 2.9 7.9 ---    6.3 12    2.6 5.1   .15 3.0   9.7
 
31 1.9   ---    2.5 8.3 ---    44    ---    2.0 ---      .08 2.4   ---   

TOTAL 68.43 88.2 108.3 514.8 448.8 805.2 601.9 784.3 427.86 324.05 875.08 306.9
MEAN 2.21 2.94 3.49 16.6 16.0 26.0 20.1 25.3 14.3 10.5 28.2 10.2
MAX 28 15 17 67 58 167 62 384 130 130 481 160
MIN .08 1.3 1.8 2.4 5.9 5.4 5.7 2.0 .56 .08 .12 1.6
CFSM .17 .23 .27 1.28 1.23 2.00 1.54 1.95 1.10 .80 2.17 .79
IN. .20 .25 .31 1.47 1.28 2.30 1.72 2.24 1.22 .93 2.50 .88

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 1998, BY WATER YEAR (WY)
MEAN 5.77 13.8 10.2 11.6 13.8 15.9 14.8 14.0 12.3 11.3 9.24 7.00
MAX 17.8 37.4 28.7 30.6 54.5 27.7 34.6 49.3 57.6 58.6 28.2 20.6
(WY) 1992 1991 1988 1993 1997 1990 1991 1990 1993 1996 1998 1989
MIN 1.11 2.94 1.03 2.78 2.08 3.83 5.30 1.25 1.02 .14 .50 .095
(WY) 1993 1998 1996 1987 1993 1996 1989 1992 1992 1991 1991 1995

SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1986 - 1998
ANNUAL TOTAL 3257.33 5353.82
ANNUAL MEAN 8.92 14.7   11.4  
HIGHEST ANNUAL MEAN 17.9   1993
LOWEST ANNUAL MEAN 7.58 1994
HIGHEST DAILY MEAN 774          Feb 21 481          Aug 4 1220      Jul 18 1996
LOWEST DAILY MEAN .08     A .08     Oct 1, July 31 .00 B
ANNUAL SEVEN-DAY MINIMUM .09     Jul 11 .24     Oct 1 .00 Jul 24 1991
INSTANTANEOUS PEAK FLOW 968          Aug 4 3070      Jul 18 1996
INSTANTANEOUS PEAK STAGE 13.75     Aug 4 17.53 Jul 18 1996
INSTANTANEOUS LOW FLOW .06     Jul 30-Aug. 3
ANNUAL RUNOFF (CFSM) .69 1.13 .88
ANNUAL RUNOFF (INCHES) 9.32 15.32 11.90
10 PERCENT EXCEEDS 15      36      24     
50 PERCENT EXCEEDS 2.8   4.7   4.0  
90 PERCENT EXCEEDS .26 1.4   .41
A - Several days.
B - Oct. 9, 10, 1988; many days in 1991-92, 1994-96; several days in 1997.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data