Station list     Available data
ILLINOIS RIVER BASIN


05533400       SAWMILL CREEK NEAR LEMONT, IL



LOCATION.-- Lat 41°42'28", long 87°57'47", 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 up stream 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.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: December 1985 to current year.
 

STAGE: Water years 1994-2001.
 

PARTIAL RECORD: Annual maximum, water years 1961-79.
PRECIPITATION: April 1986 to current year.
SURFACE-WATER QUALITY
 

MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.
BIOLOGICAL
 

BENTHIC MACROINVERTEBRATES: Water year 2000.
 

FISH: Water year 2001.
 

HABITAT: Water year 2000.

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

GAGE.-- Water-stage recorder, phone telemeter, rain gage, 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.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,070 ft3/s, July 18,1996, gage height, 17.53 ft; no flow at times in most years.
PRECIPITATION: Maximum daily total, 6.17 in., July 17, 1996.

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.6 1.6 e3.4 e2.2 e20    11    4.8 4.2 27      .07 1.8   20   
2 2.3 2.8 e3.1 e2.2 e12    10    4.6 3.2 7.5   .07 87      5.2
3 4.7 2.4 e2.8 e2.3 e9.0 9.1 4.4 2.9 5.2   3.6   27      3.1
4 45    2.1 e2.6 e2.4 e7.0 8.0 4.0 2.5 4.3   2.4   8.8   1.7
5 13    1.9 e2.4 e2.4 e6.5 6.7 5.6 2.3 37      .60 4.3   1.3
 
6 8.6 7.4 e2.3 e2.4 e6.7 6.0 16    5.4 22      .13 3.3   7.6
7 4.6 41    e2.2 e2.3 e8.0 5.8 8.5 6.4 9.1   1.4   2.6   22   
8 5.0 8.8 e2.5 e2.3 54    5.7 5.5 3.7 6.1   .56 2.0   5.2
9 3.4 61    e2.4 e2.2 265    5.5 9.4 3.1 4.7   .17 3.3   16   
10 2.9 34    e2.3 e2.2 74    5.4 6.4 4.2 3.9   .13 12      7.0
 
11 2.6 13    e2.7 e2.2 40    6.3 15    26    3.4   .13 2.6   3.4
12 2.4 8.2 e3.5 e2.3 23    12    25    6.4 9.8   .12 2.1   4.1
13 2.3 20    e3.2 e2.5 18    12    9.0 3.9 4.3   .10 2.3   3.8
14 2.3 10    e3.0 e10    34    7.6 6.8 4.6 3.2   .08 1.4   3.3
15 2.0 7.3 e2.8 38    28    25    48    3.9 2.5   .05 .93 2.2
 
16 2.4 5.7 e2.6 25    18    46    22    4.0 2.5   .03 17      2.1
17 2.3 4.9 e2.5 15    12    41    12    3.5 2.1   .03 4.2   1.7
18 2.0 e4.0 e2.4 11    9.2 31    8.0 3.0 2.4   .04 5.7   1.8
19 3.3 e3.3 e2.3 8.5 7.7 20    6.5 2.4 2.0   .04 4.5   69   
20 2.1 e2.8 e2.2 7.0 7.6 15    24    2.0 1.4   .03 2.6   16   
 
21 1.8 e2.4 e2.1 e6.0 6.6 12    45    3.9 3.3   22      1.9   31   
22 1.8 e2.3 e2.1 e5.3 6.3 9.4 29    3.2 2.8   20      1.9   9.7
23 1.8 e2.2 e2.0 e4.9 6.0 7.7 20    3.4 1.7   14      1.7   37   
24 2.4 e2.1 e2.0 e4.5 103    7.0 13    3.1 1.0   7.6   8.5   28   
25 2.1 e2.0 e2.0 e4.2 99    6.3 10    5.8 .35 104      43      9.5
 
26 1.9 e4.3 e1.9 e3.9 39    5.8 7.0 36    .20 25      15      4.9
27 2.4 e4.0 e1.9 e3.6 21    5.4 5.8 39    .16 8.1   13      2.8
28 2.0 e3.7 e1.9 e3.9 14    5.1 4.8 13    .10 4.4   20      2.1
29 1.8 e4.2 e2.0 e4.3 ---    6.3 4.2 6.0 .08 3.6   8.2   1.7
30 1.9 e3.8 e2.0 e60    ---    5.7 3.8 4.3 .07 2.6   3.3   1.4
 
31 1.8 ---    e2.1 e30    ---    5.1 ---    7.8 ---      2.2   42      ---   

TOTAL 137.5 273.2 75.2 275.0 954.6 364.9 388.1 223.1 170.16 223.28 353.93 324.6
MEAN 4.44 9.11 2.43 8.87 34.1 11.8 12.9 7.20 5.67 7.20 11.4 10.8
MAX 45 61 3.5 60 265 46 48 39 37 104 87 69
MIN 1.8 1.6 1.9 2.2 6.0 5.1 3.8 2.0 .07 .03 .93 1.3
CFSM .34 .70 .19 .68 2.62 .91 1.00 .55 .44 .55 .88 .83
IN. .39 .78 .22 .79 2.73 1.04 1.11 .64 .49 .64 1.01 .93
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 2001, BY WATER YEAR (WY)
MEAN 6.09 12.2 9.16 11.7 14.4 14.5 17.6 15.6 12.7 10.7 8.84 7.42
MAX 17.8 37.4 28.7 30.6 54.5 27.7 53.4 49.3 57.6 58.6 28.2 20.6
(WY) 1992 1991 1988 1993 1997 1990 1999 1990 1993 1996 1998 1989
MIN 1.11 .86 1.03 2.37 2.08 3.54 5.30 1.25 1.02 .14 .50 .095
(WY) 1993 2000 1996 2000 1993 2000 1989 1992 1992 1991 1991 1995

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1986 - 2001
ANNUAL TOTAL 4207.76 3763.57
ANNUAL MEAN 11.5   10.3   11.6  
HIGHEST ANNUAL MEAN 17.9   1993
LOWEST ANNUAL MEAN 7.58 1994
HIGHEST DAILY MEAN 231          Apr 20 265          Feb 9 1220      Jul 18 1996
LOWEST DAILY MEAN .00     Sep 5,6,9 .03     Jul 16,17,20 .00 A
ANNUAL SEVEN-DAY MINIMUM .04     Sep 3 .04     Jul 14 .00 Jul 24 1991
MAXIMUM PEAK FLOW 479          Feb 9 3070      Jul 18 1996
MAXIMUM PEAK STAGE 12.26     Feb 9 17.53 Jul 18 1996
INSTANTANEOUS LOW FLOW .01     Jul 16,21
ANNUAL RUNOFF (CFSM) .88 .79 .89
ANNUAL RUNOFF (INCHES) 12.04 10.77 12.08
10 PERCENT EXCEEDS 27      25      25     
50 PERCENT EXCEEDS 3.5   4.2   4.0  
90 PERCENT EXCEEDS .99 1.8   .42

A - At most times in most years.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data