Station list     Available data
ILLINOIS RIVER BASIN


05537500       LONG RUN NEAR LEMONT, IL

 

LOCATION.-- Lat 41°38'33", long 87°59'57" (NAD of 1927), in SW1/4SE1/4 sec.32, T.37 N., R.11 E., Cook County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on State Street, 2 mi south of Lemont, and at mile 5.4.
 

DRAINAGE AREA.-- 20.9 mi2.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: July 1951 to current year.
 

STAGE: Water years 1994-2002.
 

REVISED RECORDS.-- WSP 1338: 1952(M). WDR IL-75-1: Drainage area.
 

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 637.20 ft above NGVD of 1929.
 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 5,310 ft3/s, July 18, 1996, from rating curve extended above 2,800 ft3/s, gage height, 11.10 ft; no flow at times in most years.
 

REMARKS FOR CURRENT YEAR.-- Records good.
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.9 11    24    5.8 21    13  15  28  9.4 3.5 1.4 1.7
2 3.8 11    17    5.3 16    15  50  28  8.4 2.9 1.1 1.9
3 3.2 11    14    5.0 13    24  43  21  7.9 2.4 1.2 3.6
4 4.9 9.2 12    5.0 11    22  27  17  21    2.4 1.4 2.1
5 71    8.5 11    5.2 10    18  22  15  27    3.2 7.3 1.7
 
6 31    7.9 10    5.5 8.4 21  20  22  16    2.2 3.6 1.5
7 15    7.1 9.3 5.2 7.6 57  26  22  12    1.8 2.0 1.5
8 11    8.1 8.8 4.9 8.1 191  132  20  9.3 1.6 1.4 1.6
9 8.9 6.8 7.8 5.2 14    222  303  59  8.0 78    1.3 1.9
10 7.7 6.7 6.9 5.4 63    120  121  35  9.7 22    1.0 2.0
 
11 8.7 6.1 6.4 5.0 52    69  67  135  26    9.8 1.1 2.2
12 38    5.9 6.3 4.9 36    52  48  569  14    6.2 1.3 2.0
13 142    6.4 11    5.0 32    40  35  263  11    4.7 3.9 1.9
14 337    6.6 12    5.1 24    33  28  108  10    3.7 4.5 1.9
15 119    6.7 16    5.7 22    27  22  60  9.5 3.3 2.4 2.0
 
16 66    6.0 13    5.4 20    24  19  80  7.9 2.8 2.1 2.1
17 42    5.9 23    6.0 17    21  19  90  6.2 2.0 1.9 1.9
18 29    5.4 22    5.5 16    18  17  48  5.5 2.2 1.6 5.6
19 20    6.2 17    5.1 22    16  15  35  4.7 1.9 2.9 5.3
20 16    6.2 15    5.0 70    16  107  29  4.1 1.8 3.6 7.5
 
21 13    5.1 12    5.0 55    16  67  24  3.6 1.7 2.1 7.4
22 11    4.8 12    5.2 35    14  60  20  3.5 1.9 9.2 5.3
23 59    4.6 19    9.6 26    13  39  17  3.3 1.6 9.0 4.3
24 63    5.1 16    10    20    13  36  31  3.1 1.3 8.6 3.0
25 71    9.5 13    9.0 17    15  46  29  4.1 1.1 4.6 1.9
 
26 35    7.4 9.9 7.8 17    13  28  22  7.9 1.2 2.8 1.6
27 23    7.6 9.7 7.4 17    12  54  17  28    2.6 2.0 2.0
28 17    7.3 9.1 7.1 14    12  110  15  9.9 2.3 1.7 1.8
29 14    7.9 7.9 6.8 ---    15  54  14  5.9 1.9 1.8 2.0
30 12    28    6.8 7.2 ---    21  36  12  4.4 1.7 1.8 2.4
 
31 12    ---    6.3 19    ---    16  ---  11  ---    1.4 1.7 ---   

TOTAL 1307.1 236.0 384.2 199.3 684.1 1179 1666 1896 301.3 177.1 92.3 83.6
MEAN 42.16 7.867 12.39 6.429 24.43 38.03 55.53 61.16 10.04 5.713 2.977 2.787
MAX 337 28 24 19 70 222 303 569 28 78 9.2 7.5
MIN 2.9 4.6 6.3 4.9 7.6 12 15 11 3.1 1.1 1.0 1.5
CFSM 2.02 0.38 0.59 0.31 1.17 1.82 2.66 2.93 0.48 0.27 0.14 0.13
IN. 2.33 0.42 0.68 0.35 1.22 2.10 2.97 3.37 0.54 0.32 0.16 0.15


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2002, BY WATER YEAR (WY)
MEAN 10.26 13.91 16.49 16.76 22.19 34.48 36.91 23.96 18.63 11.37 5.557 7.694
MAX 163 71.9 92.2 75.5 104 131 86.9 74.5 89.6 126 27.4 74.9
(WY) 1955 1986 1983 1993 1997 1979 1975 1966 1993 1996 1972 1961
MIN 0.000 0.006 0.016 0.020 0.028 2.19 1.69 2.83 0.73 0.048 0.000 0.000
(WY) 1965 1972 1964 1977 1964 1964 1963 1958 1988 1961 1964 1963

SUMMARY STATISTICS FOR 2001 CALENDAR YEAR FOR 2002 WATER YEAR WATER YEARS 1951 - 2002
ANNUAL TOTAL 7610.72 8206.0  
ANNUAL MEAN 20.85 22.48 18.11    
HIGHEST ANNUAL MEAN 39.9       1993
LOWEST ANNUAL MEAN 3.37     1963
HIGHEST DAILY MEAN 518          Feb 9 569          May 12 2190          Jul 18 1996
LOWEST DAILY MEAN 0.21     Jul 14 1.0       Aug 10 0.00     A
ANNUAL SEVEN-DAY MINIMUM 0.63     Jul 10 1.4       Jul 29 0.00     Aug 27 1953
MAXIMUM PEAK FLOW 811          May 12 5310      B Jul 18 1996
MAXIMUM PEAK STAGE 6.93     May 12 11.10     Jul 18 1996
INSTANTANEOUS LOW FLOW 0.94     C
ANNUAL RUNOFF (CFSM) 1.00 1.08 0.87    
ANNUAL RUNOFF (INCHES) 13.55 14.61 11.77    
10 PERCENT EXCEEDS 53      52      42         
50 PERCENT EXCEEDS 9.1   9.6   5.3      
90 PERCENT EXCEEDS 3.2   1.9   0.11    

A - At times in most years.

B - From rating curve extended above 2,800 ft3/s.

C - Aug. 2, 3, 10, and 11.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data