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 (636.92 ft NAVD 1988).
 

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 2004 TO SEPTEMBER 2005
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 3.8 33    101    10    7.7 36    32    5.6 2.8   2.5   0.89 0.61
2 13    70    60    117    7.1 25    62    5.1 2.3   1.6   0.78 0.65
3 5.2 31    44    126    6.8 19    38    4.9 2.5   1.2   0.79 0.60
4 3.3 67    33    122    9.2 17    27    4.6 4.0   1.2   0.76 0.59
5 2.4 56    27    66    20    17    21    4.1 6.2   1.7   0.68 0.61
 
6 2.2 31    37    52    29    17    18    3.9 3.3   2.0   0.78 0.74
7 1.8 20    213    40    e60    17    17    3.9 2.5   1.6   0.75 0.71
8 4.9 13    170    32    e55    16    14    3.7 3.2   1.3   0.68 0.66
9 8.5 10    75    27    35    13    12    4.2 2.2   0.86 0.88 0.69
10 4.2 8.3 50    26    26    12    10    5.8 2.0   0.79 0.75 0.63
 
11 3.7 7.3 40    38    21    14    9.5 7.6 1.7   0.99 1.9   0.74
12 4.3 6.5 31    203    19    14    51    8.5 1.7   0.83 2.6   0.80
13 3.9 4.6 25    481    36    13    57    9.0 1.8   1.1   1.7   0.71
14 4.1 4.0 18    226    192    12    27    11    2.0   0.89 2.0   0.80
15 8.5 3.7 15    106    114    11    19    6.5 2.0   0.89 1.2   0.84
 
16 11    3.4 14    62    100    11    15    5.0 1.8   0.82 0.88 2.8  
17 e5.0 3.2 13    e49    55    11    13    3.8 1.6   1.0   0.79 1.8  
18 e2.4 3.2 12    e33    37    11    12    3.2 1.4   0.87 0.89 1.2  
19 e2.3 13    e10    e24    28    12    10    22    1.3   0.83 1.5   2.9  
20 e2.2 20    e9.0 e20    33    11    8.8 17    1.4   0.75 2.9   2.5  
 
21 e2.7 13    e8.0 e17    46    11    9.2 9.3 1.4   0.91 2.1   1.4  
22 17    8.9 e7.2 e15    34    10    24    6.8 1.2   0.91 1.2   0.92
23 30    6.7 e6.6 e14    27    13    20    5.4 0.96 0.81 0.92 0.84
24 22    9.6 e6.2 e13    24    9.8 13    4.2 1.3   0.90 0.73 0.81
25 11    29    e5.6 e12    21    25    11    3.4 0.92 1.5   0.67 0.90
 
26 5.5 29    e5.2 e11    19    35    9.1 3.1 1.1   5.2   0.70 1.0  
27 4.0 110    e5.0 e10.5 18    25    7.6 2.9 1.3   15      0.62 0.88
28 3.3 116    e4.8 e10    40    20    6.5 2.9 1.3   3.3   0.64 1.1  
29 3.3 57    e4.7 9.5 ---    16    6.2 3.0 1.2   1.4   0.68 4.6  
30 4.6 51    e4.8 9.1 ---    18    6.3 2.9 4.3   1.1   0.62 2.1  
 
31 5.5 ---    e6.2 8.6 ---    54    ---    2.6 ---      0.95 0.72 ---     

TOTAL 205.6 838.4 1061.3 1989.7 1119.8 545.8 586.2 185.9 62.68 55.70 33.70 36.13
MEAN 6.63 27.9 34.2 64.2 40.0 17.6 19.5 6.00 2.09 1.80 1.09 1.20
MAX 30 116 213 481 192 54 62 22 6.2 15 2.9 4.6
MIN 1.8 3.2 4.7 8.6 6.8 9.8 6.2 2.6 0.92 0.75 0.62 0.59
CFSM 0.32 1.34 1.64 3.07 1.91 0.84 0.93 0.29 0.10 0.09 0.05 0.06
IN. 0.37 1.49 1.89 3.54 1.99 0.97 1.04 0.33 0.11 0.10 0.06 0.06
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2005, BY WATER YEAR (WY)
MEAN 9.95 14.6 16.7 17.2 21.9 33.9 35.7 24.4 18.7 11.8 6.20 7.62
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 2004 CALENDAR YEAR FOR 2005 WATER YEAR WATER YEARS 1951 - 2005
ANNUAL TOTAL 9140.5   6720.91  
ANNUAL MEAN 25.0   18.4     18.2        
HIGHEST ANNUAL MEAN 39.9         1993
LOWEST ANNUAL MEAN 3.37       1963
HIGHEST DAILY MEAN 549          Aug 28 481            Jan 13 2190            Jul 18 1996
LOWEST DAILY MEAN 1.8       Oct 7 0.59       Sep 4 0.00       A
ANNUAL SEVEN-DAY MINIMUM 2.8       Aug 12 0.63       Aug 30 0.00       A
MAXIMUM PEAK FLOW 668            Jan 13 5310        B Jul 18 1996
MAXIMUM PEAK STAGE 6.53       Jan 13 11.10       Jul 18 1996
INSTANTANEOUS LOW FLOW 0.52       C
ANNUAL RUNOFF (CFSM) 1.19 0.881 0.869    
ANNUAL RUNOFF (INCHES) 16.27 11.96   11.80      
10 PERCENT EXCEEDS 56      42        42           
50 PERCENT EXCEEDS 8.4   6.5     5.4        
90 PERCENT EXCEEDS 3.2   0.83   0.19      

A - At times in most years.

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

C - Several days.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data