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 and crest-stage gage. Datum of gage is 438.91 ft above sea level.

REMARKS.--Records poor. Gage-height telemeter at station.
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 6.2 13  23    e3.5 973  143  41  130  e160  339    5.8 e1.6  
2 5.8 109  15    e3.5 1430  101  39  74  e130  386    4.3 e1.5  
3 6.7 390  13    e4.0 913  94  49  54  e100  108    3.0 e1.4  
4 6.4 307  13    e4.5 320  86  130  47  e80  40    2.7 e1.3  
5 6.0 125  15    e4.3 162  81  213  115  e250  26    2.7 e1.2  
 
6 22    65  19    e4.5 120  95  681  320  e200  20    2.0 e1.2  
7 10    43  21    e6.0 2570  86  608  204  e100  162    1.5 e1.1  
8 6.3 36  15    e7.0 5150  110  291  95  e60  108    11    e1.1  
9 5.9 34  13    e6.0 2080  446  284  54  e90  58    4.2 e1.0  
10 6.8 166  13    e5.4 963  479  253  40  e80  367    1.9 e.95
 
11 5.5 249  11    e5.0 441  331  225  35  e35  199    1.6 e.91
12 5.0 202  8.4 e5.5 486  156  141  89  e100  42    1.7 e1.1  
13 4.3 95  7.8 e35    415  101  89  522  406  24    2.0 e1.4  
14 3.5 64  7.2 e32    202  82  64  533  462  18    1.9 e1.2  
15 3.0 52  6.5 e28    138  69  193  238  538  15    1.6 e1.1  
 
16 2.8 45  6.1 e25    125  61  414  105  396  12    1.5 e1.0  
17 6.4 39  8.2 e100    124  57  400  75  110  11    1.5 e.94
18 11    34  7.9 e450    121  51  203  64  43  10    1.4 e.90
19 10    34  7.0 578    106  47  118  49  32  9.0 1.6 e.86
20 6.8 39  7.3 553    94  44  88  41  27  7.5 1.7 e.80
 
21 4.4 34  8.1 491    91  43  76  34  23  7.4 1.8 e.78
22 3.9 30  9.9 613    87  41  70  31  21  6.5 1.8 e.76
23 4.3 29  8.8 1000    80  307  61  30  19  5.6 2.0 e.74
24 5.4 27  7.8 1320    81  314  50  31  44  4.6 2.6 e.76
25 7.1 23  6.7 1080    86  132  45  29  47  4.4 2.5 e.84
 
26 8.6 23  e5.0 489    86  79  47  26  207  4.6 2.1 e.90
27 8.0 23  e4.5 228    144  61  60  22  437  4.5 2.1 e.86
28 6.7 19  e4.2 163    272  53  96  21  149  4.6 2.3 e.84
29 10    18  e4.0 132    ---  49  190  20  42  10    e2.0 e.82
30 17    18  e3.8 110    ---  45  218  19  27  11    e1.9 e.80
 
31 16    ---  e3.7 488    ---  43  ---  21  ---  8.9 e1.7 ---     

TOTAL 231.8 2385 303.9 7974.2 17860 3887 5437 3168 4415 2033.6 78.4 30.66
MEAN 7.48 79.5 9.80 257 638 125 181 102 147 65.6 2.53 1.02
MAX 22 390 23 1320 5150 479 681 533 538 386 11 1.6
MIN 2.8 13 3.7 3.5 80 41 39 19 19 4.4 1.4 .74
CFSM .05 .52 .06 1.67 4.14 .81 1.18 .66 .96 .43 .02 .01
IN. .06 .58 .07 1.93 4.31 .94 1.31 .77 1.07 .49 .02 .01

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 1999, BY WATER YEAR (WY)
MEAN 24.0 87.7 169 147 214 234 248 148 100 64.8 26.0 24.1
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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1967 - 1999
ANNUAL TOTAL 67523.2   47804.56    
ANNUAL MEAN 185      131          123         
HIGHEST ANNUAL MEAN 244          1983
LOWEST ANNUAL MEAN 23.1       1980
HIGHEST DAILY MEAN 2600          Mar 21 5150              Feb 8 7740          Apr 12 1979
LOWEST DAILY MEAN 2.8       Oct 16 .74 A     Sep 23 .00     B
ANNUAL SEVEN-DAY MINIMUM 4.4       Oct 11 .79         Sep 19 .00     Sep 29 1968
INSTANTANEOUS PEAK FLOW 6210              Feb 8 10600      C Apr 12 1979
INSTANTANEOUS PEAK STAGE 16.89         Feb 8 17.94     May 17 1990
ANNUAL RUNOFF (CFSM) 1.20 .85     .80    
ANNUAL RUNOFF (INCHES) 16.31 11.55     10.88    
10 PERCENT EXCEEDS 622      350          300         
50 PERCENT EXCEEDS 39      31          15         
90 PERCENT EXCEEDS 7.1   1.6       .75    
A - Estimated, but may have been less during periods of estimated discharges in 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