Station list     Available data
KASKASKIA RIVER BASIN


05594450                         SILVER CREEK NEAR TROY, IL



LOCATION.--Lat 38°43'00", long 89°49'45", in SE1/4SW1/4 sec.12, T.3 N., R.7 W., Madison County, Hydrologic Unit 07140204, on right bank at upstream side of bridge on U.S. Highway 40, 0.2 mi upstream from railroad bridge, 1.9 mi upstream from East Fork Silver Creek, 1.9 mi southeast of Troy, and at mile 44.6.

DRAINAGE AREA.--154 mi2.

PERIOD OF RECORD.--October 1966 to current year.

REVISED RECORDS.--WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 438.91 ft above sea level.

REMARKS.--Records fair except those for estimated daily discharges, which are poor. Gage-height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 1.0   3.8 3.9 e6.2 29  87  259  147    15    117    922  18   
2 1.2   3.8 3.4 e6.0 24  53  182  85    12    48    309  e50   
3 1.2   2.7 4.7 e7.0 20  44  154  111    9.6 26    91  e90   
4 1.2   2.9 5.2 e9.0 18  39  492  387    241    29    52  e50   
5 1.2   5.1 e4.0 e13    17  37  436  172    824    33    1650  28   
 
6 1.1   12    e3.3 e25    16  35  172  75    694    24    1590  19   
7 1.2   3.6 e2.9 78    15  34  108  71    230    226    906  14   
8 1.1   2.1 e2.5 378    14  362  83  85    225    559    340  11   
9 .99 2.6 e2.3 480    13  649  66  74    567    170    151  9.5
10 .88 3.2 e4.0 423    13  907  55  46    605    44    81  8.2
 
11 .80 2.9 e4.0 135    26  727  48  34    544    139    183  7.6
12 .75 2.5 e3.7 65    55  208  43  29    739    228    450  7.3
13 .89 2.6 e3.5 46    78  101  67  24    1000    48    309  7.2
14 1.4   3.1 e3.5 38    50  81  243  21    1140    26    92  7.6
15 1.4   3.4 e3.6 53    34  66  656  18    1000    19    48  7.8
 
16 1.4   2.9 e3.4 45    39  57  1970  17    1040    17    33  8.0
17 1.3   2.7 e3.0 40    283  139  1510  14    809    13    45  8.4
18 1.4   2.5 e2.7 32    614  731  801  13    267    11    286  e12   
19 1.5   2.6 e2.5 26    633  954  238  11    100    10    683  e20   
20 1.5   3.0 e2.3 25    477  2120  102  9.2 64    8.5 551  e13   
 
21 1.5   2.9 e2.2 22    177  2600  77  64    1030    9.6 177  9.1
22 1.5   3.2 e5.0 22    109  1850  66  566    1550    19    59  7.3
23 1.5   3.1 e4.0 22    77  969  56  836    1430    378    36  e5.3
24 5.5   2.9 e36    22    60  319  48  1060    509    94    28  4.4
25 2.8   2.7 111    21    51  137  39  449    137    32    23  21   
 
26 6.2   2.7 119    23    51  99  35  175    66    17    19  25   
27 4.6   2.5 e35    32    124  94  35  91    49    16    17  62   
28 3.4   2.6 e15    45    224  516  39  58    39    15    16  24   
29 2.7   2.9 e10    54    ---  817  137  44    33    15    16  13   
30 2.5   4.6 e7.5 45    ---  1100  218  33    61    915    14  7.7
 
31 2.2   ---    e5.5 35    ---  447  ---  23    ---    1230    14  ---   

TOTAL 57.81 100.1 418.6 2273.2 3341 16379 8435 4842.2 15029.6 4536.1 9191 575.4
MEAN 1.86 3.34 13.5 73.3 119 528 281 156 501 146 296 19.2
MAX 6.2 12 119 480 633 2600 1970 1060 1550 1230 1650 90
MIN .75 2.1 2.2 6.0 13 34 35 9.2 9.6 8.5 14 4.4
CFSM .01 .02 .09 .48 .77 3.43 1.83 1.01 3.25 .95 1.93 .12
IN. .01 .02 .10 .55 .81 3.96 2.04 1.17 3.63 1.10 2.22 .14

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 1998, BY WATER YEAR (WY)
MEAN 24.5 88.0 173 144 201 238 250 150 98.5 64.7 26.7 24.8
MAX 165 509 902 562 646 927 738 827 501 570 296 408
(WY) 1987 1985 1983 1974 1982 1978 1994 1995 1998 1969 1998 1993
MIN .23 .34 .42 .31 9.25 6.74 16.7 5.26 .91 1.44 .75 .093
(WY) 1972 1972 1977 1977 1978 1981 1986 1977 1988 1984 1971 1988

SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1967 - 1998
ANNUAL TOTAL 29687.82     65179.01
ANNUAL MEAN 81.3       179      123         
HIGHEST ANNUAL MEAN 244          1983
LOWEST ANNUAL MEAN 23.1       1980
HIGHEST DAILY MEAN 2650              Feb 28 2600          Mar 21 7740          Apr 12 1979
LOWEST DAILY MEAN .45 A     Aug 8 .75     Oct 12 .00     B
ANNUAL SEVEN-DAY MINIMUM .52         Aug 3 .94     Oct 7 .00     Sep 29 1968
INSTANTANEOUS PEAK FLOW 2730          Mar 21 10600      C Apr 12 1979
INSTANTANEOUS PEAK STAGE 14.72     Mar 21 17.94     May 17 1990
INSTANTANEOUS LOW FLOW .70     Oct 12
ANNUAL RUNOFF (CFSM) .53     1.16 .80    
ANNUAL RUNOFF (INCHES) 7.17     15.74 10.86    
10 PERCENT EXCEEDS 175          622      300         
50 PERCENT EXCEEDS 10          33      15         
90 PERCENT EXCEEDS 1.2       2.6   .71    
A - Estimated, may have been less during periods of estimated discharges in July, Aug. and Sept.
B - Several days in 1967-68, 1973, 1988.
C - Gage height, 17.52 ft.


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Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data