Station list     Available data
ILLINOIS RIVER BASIN


05536215                         THORN CREEK AT GLENWOOD, IL



LOCATION.--Lat 41°31'50", long 87°36'20", in SW1/4SE1/4 sec.9, T.35 N., R.14 E., Cook County, Hydrologic Unit 07120003, on right bank 20 ft downstream from abandoned Baltimore and Ohio Chicago Terminal Railroad bridge, 0.7 mi north of Chicago Heights, 0.8 mi south of Glenwood, 1.0 mi upstream from Deer Creek, and at mile 9.2.

DRAINAGE AREA.--24.7 mi2.

PERIOD OF RECORD.--May 1949 to current year. Prior to October 1974, records published with those for streams in the St. Lawrence River basin (WSP 1307, 1727, 1911, 2111, WDR IL 1971-74).

REVISED RECORDS.--WSP 1437: 1955. WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 610.97 ft above sea level.

REMARKS.--Records fair except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant upstream averaged 23.4 ft3/s and consists of publicly supplied water from Lake Michigan and ground-water sources. The maximum monthly effluent was 41.5 ft3/s in April, and the minimum was 15.8 ft3/s in September.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Apr. 1947, reached a stage of 12.94 ft, from floodmarks, discharge not determined.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 24  24  23  14  58  35  25  67  207  73  31  23 
2 32  23  20  15  98  40  24  57  287  35  26  23 
3 38  22  18  16  78  45  25  50  84  31  24  23 
4 25  22  20  16  60  36  50  45  55  28  25  23 
5 24  31  20  16  47  48  26  45  46  29  24  23 
 
6 43  22  154  16  45  78  40  68  39  28  24  23 
7 27  21  118  16  43  60  27  47  36  26  24  24 
8 24  23  55  16  41  48  35  42  33  28  23  25 
9 23  26  35  16  39  45  122  39  37  28  23  26 
10 23  119  29  16  35  48  77  37  40  28  24  25 
 
11 22  39  26  16  40  48  111  39  43  26  24  25 
12 22  32  25  16  39  51  64  128  51  25  50  28 
13 22  29  21  17  33  50  47  93  157  25  34  29 
14 21  28  23  17  30  49  38  61  91  25  28  25 
15 22  26  21  17  30  58  112  48  51  25  25  25 
 
16 19  25  20  23  30  83  347  42  39  25  24  25 
17 28  23  20  51  28  117  150  51  33  32  24  24 
18 52  23  19  87  27  81  84  45  32  27  24  24 
19 26  23  20  40  26  55  63  38  31  27  78  24 
20 24  23  18  35  26  45  52  36  30  28  28  25 
 
21 24  23  20  68  25  39  51  44  29  41  25  28 
22 26  22  19  453  23  35  197  44  59  47  22  26 
23 25  22  19  630  23  32  467  77  47  31  25  25 
24 24  21  19  325  22  30  145  48  58  28  64  26 
25 23  23  17  151  26  28  85  41  41  26  60  26 
 
26 22  23  18  97  27  27  64  35  39  25  35  26 
27 52  20  18  122  64  27  384  34  38  26  30  26 
28 45  21  17  125  43  26  461  32  33  25  28  65 
29 32  21  18  79  ---  26  143  31  33  25  25  45 
30 33  32  17  64  ---  25  85  29  30  26  24  25 
 
31 27  ---  16  56  ---  24  ---  80  ---  32  24  --- 

TOTAL 874 832 903 2646 1106 1439 3601 1573 1829 931 949 810
MEAN 28.2 27.7 29.1 85.4 39.5 46.4 120 50.7 61.0 30.0 30.6 27.0
MAX 52 119 154 630 98 117 467 128 287 73 78 65
MIN 19 20 16 14 22 24 24 29 29 25 22 23


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 1999, BY WATER YEAR (WY)
MEAN 26.9 34.2 38.5 36.7 41.6 58.9 61.4 48.9 44.0 33.6 29.0 28.0
MAX 87.1 108 172 97.7 136 188 120 153 138 147 85.2 108
(WY) 1955 1991 1983 1993 1997 1979 1999 1996 1993 1996 1968 1961
MIN 11.0 9.31 11.4 12.0 19.3 20.8 19.3 18.2 12.4 14.0 11.8 9.28
(WY) 1950 1950 1954 1954 1964 1981 1971 1954 1949 1952 1949 1949

SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1949 - 1999
ANNUAL TOTAL 20487    17493     
ANNUAL MEAN 56.1 47.9   40.2      
HIGHEST ANNUAL MEAN 67.9       1993
LOWEST ANNUAL MEAN 24.8       1954
HIGHEST DAILY MEAN 919        May 7 630          Jan 23 1500          A
LOWEST DAILY MEAN 16        Dec 31 14          Jan 1 6.0       B
ANNUAL SEVEN-DAY MINIMUM 17        Dec 25 16          Dec 31 8.5       Sep 5 1949
INSTANTANEOUS PEAK FLOW 1100          Apr 27 2700      C Jul 18 1996
INSTANTANEOUS PEAK STAGE 9.69     Apr 27 11.26 D Aug 17 1968
INSTANTANEOUS LOW FLOW 8.0       E .00 F Jun 3 1992
10 PERCENT EXCEEDS 105    80      68         
50 PERCENT EXCEEDS 31    28      23         
90 PERCENT EXCEEDS 21    20      15         
A - Aug. 17, 1968; July 18, 1996 (estimated).
B - July 4, Aug. 21, Sept. 5, 11, 25, 1949.
C - Estimated, gage height unknown.
D - May have been higher during period of no gage-height record, July 17-20, 1996.
E - Dec. 20, Jan. 3, 5.
F - No effluent from sewage-treatment plant because of temporary equipment repair.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data