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 to current year.
 

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

GAGE.-- Water-stage recorder and phone telemeter. 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 except those for estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.6 2.4 12    9.0 e5.2 18  31    23    142    3.9 2.6 27   
2 2.6 62    10    9.0 e5.0 20  25    17    72    3.5 6.9 17   
3 3.9 95    9.7 8.8 e5.2 15  21    12    54    4.4 12    14   
4 4.9 57    9.7 9.6 e5.0 33  19    9.0 34    6.7 64    12   
5 3.3 118    36    11    e4.8 329  14    7.7 24    4.5 24    9.2
 
6 2.5 55    42    10    e5.1 155  12    6.8 18    13    11    7.5
7 2.0 31    26    7.9 e5.6 76  11    7.6 14    23    6.9 6.0
8 1.9 20    19    e7.6 e5.6 50  10    6.8 11    8.1 5.1 4.9
9 1.8 14    23    e7.0 e5.4 37  9.0 6.1 8.9 6.6 4.2 4.7
10 1.7 12    142    e6.2 e5.2 29  8.3 9.6 17    11    3.6 3.9
 
11 1.8 11    80    e5.5 e5.1 24  7.8 6.5 100    6.2 3.5 3.2
12 3.2 11    39    e5.2 e5.0 16  7.3 7.1 459    4.8 3.1 3.0
13 3.8 8.9 25    e5.2 e4.9 14  6.8 53    193    4.1 3.0 2.9
14 15    7.5 20    e5.1 e4.9 19  6.1 302    96    4.4 2.8 2.9
15 11    7.0 17    e4.9 e4.8 17  5.7 230    64    3.5 2.6 3.6
 
16 7.0 7.2 16    e4.3 e4.7 16  5.4 85    43    3.1 2.3 27   
17 5.3 7.8 14    e3.9 e4.7 13  5.8 49    31    2.9 2.8 11   
18 3.4 198    12    e4.7 e4.7 15  5.4 100    21    2.7 3.2 6.1
19 3.2 221    11    e4.3 e5.0 18  4.8 72    15    2.6 4.0 4.1
20 3.1 84    12    e4.1 e6.0 17  13    45    12    2.7 3.2 3.4
 
21 3.3 50    9.1 e3.9 e45    15  48    55    13    5.4 2.8 3.0
22 3.0 36    9.0 e3.8 e26    12  20    41    13    16    2.6 2.7
23 2.6 56    9.5 e3.8 e30    11  13    71    8.7 14    2.6 2.7
24 2.5 139    9.2 e3.8 41    18  10    41    7.2 5.6 3.4 2.9
25 12    56    10    e3.9 26    27  35    38    6.8 3.9 19    3.3
 
26 8.2 37    8.7 e4.2 19    34  20    29    5.8 3.1 37    3.2
27 5.1 27    7.4 e4.7 15    33  13    22    5.1 2.8 67    3.0
28 3.7 20    12    e5.2 14    56  9.9 17    5.3 2.8 549    4.0
29 3.1 16    15    e6.0 13    144  7.7 13    4.9 2.9 151    4.0
30 2.7 14    12    e5.8 ---    65  15    93    4.1 3.0 62    3.5
 
31 2.7 ---    10    e5.6 ---    45  ---    236    ---    3.2 38    ---   

TOTAL 132.9 1480.8 687.3 184.0 330.9 1391 420.0 1711.2 1502.8 184.4 1105.2 205.7
MEAN 4.29 49.4 22.2 5.94 11.4 44.9 14.0 55.2 50.1 5.95 35.7 6.86
MAX 15 221 142 11 45 329 48 302 459 23 549 27
MIN 1.7 2.4 7.4 3.8 4.7 11 4.8 6.1 4.1 2.6 2.3 2.7
CFSM 0.21 2.36 1.06 0.28 0.55 2.15 0.67 2.64 2.40 0.28 1.71 0.33
IN. 0.24 2.64 1.22 0.33 0.59 2.48 0.75 3.05 2.67 0.33 1.97 0.37
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2004, BY WATER YEAR (WY)
MEAN 10.0 14.4 16.4 16.3 21.6 34.2 36.1 24.7 19.0 12.0 6.30 7.74
MAX 163 71.9 92.2 75.5 104 131 86.9 74.5 89.6 126 35.7 74.9
(WY) 1955 1986 1983 1993 1997 1979 1975 1966 1993 1996 2004 1961
MIN 0.00 0.01 0.02 0.02 0.03 2.19 1.69 2.83 0.73 0.05 0.00 0.00
(WY) 1965 1972 1964 1977 1964 1964 1963 1958 1988 1961 1964 1963

SUMMARY STATISTICS FOR 2003 CALENDAR YEAR FOR 2004 WATER YEAR WATER YEARS 1951 - 2004
ANNUAL TOTAL 6622.17   9336.2  
ANNUAL MEAN 18.1     25.5   18.1        
HIGHEST ANNUAL MEAN 39.9         1993
LOWEST ANNUAL MEAN 3.37       1963
HIGHEST DAILY MEAN 504            Jul 27 549          Aug 28 2190            Jul 18 1996
LOWEST DAILY MEAN 0.71       Jul 4 1.7       Oct 10 0.00       A
ANNUAL SEVEN-DAY MINIMUM 0.99       Jun 28 2.1       Oct 6 0.00       A
MAXIMUM PEAK FLOW 1090          Aug 28 5310        B Jul 18 1996
MAXIMUM PEAK STAGE 7.46     Aug 28 11.10       Jul 18 1996
INSTANTANEOUS LOW FLOW 1.6       Oct 9-11
ANNUAL RUNOFF (CFSM) 0.868 1.22 0.868    
ANNUAL RUNOFF (INCHES) 11.79   16.62 11.80      
10 PERCENT EXCEEDS 42        56      42           
50 PERCENT EXCEEDS 7.0     9.1   5.4        
90 PERCENT EXCEEDS 1.3     3.0   0.17      

A - At times in most years.

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


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data