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.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1966 to current year.
 

STAGE: Water years 1994-2001.
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1978-91.

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

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 438.91 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 10,600 ft3/s, April 12, 1979, gage height, 17.52 ft; maximum gage height, 17.94 ft, May 17, 1990, discharge, 9,170 ft3/s; no flow for several days in 1967-68, 1973, 1988.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 31  e15  56  e21  787  123  32  15    366    3.2 2.4 2.4
2 24  e18  51  e20  334  98  30  14    85    3.1 2.5 2.1
3 19  e24  47  e20  117  85  46  14    35    3.0 7.6 2.1
4 173  e21  44  e22  103  73  46  13    246    7.8 2.7 2.2
5 922  e20  41  e26  79  62  47  13    453    6.0 2.3 2.2
 
6 866  e100  39  e31  74  54  41  15    526    4.3 2.2 2.4
7 869  509  37  e36  69  50  38  19    552    3.5 2.1 2.3
8 324  567  35  e42  68  47  42  15    280    3.1 2.4 2.9
9 83  777  34  e42  380  45  38  13    67    2.9 2.3 15   
10 46  948  33  e36  701  43  36  13    36    2.8 3.9 12   
 
11 36  1170  54  e32  882  41  448  11    26    2.6 3.1 4.3
12 31  639  e140  e30  390  41  1060  8.7 21    2.6 2.4 2.7
13 26  372  e180  e37  166  40  556  7.6 17    2.5 1.9 2.1
14 23  360  e160  e170  264  38  126  7.3 14    2.4 1.6 2.0
15 34  159  e80  e450  292  40  69  7.0 12    2.4 1.7 2.0
 
16 91  96  e58  e520  180  87  54  6.3 11    2.4 1.8 2.1
17 401  73  e47  e500  112  101  43  5.6 12    2.4 1.8 1.9
18 209  58  e40  e280  76  82  35  6.8 9.2 9.4 2.4 47   
19 90  49  e35  e180  65  59  32  19    7.3 64    1.6 63   
20 56  45  e31  e120  65  50  31  12    7.1 26    1.5 15   
 
21 42  41  e29  e85  59  46  29  37    10    15    1.6 7.3
22 e33  37  e27  e70  54  43  27  28    11    7.7 2.2 3.9
23 e29  34  e25  e58  52  41  26  25    7.0 4.5 2.5 2.8
24 e26  33  e24  e54  140  39  25  15    5.8 16    644    2.3
25 e23  144  e23  e48  672  37  23  11    6.0 6.3 474    2.0
 
26 e21  315  e22  e45  1150  34  23  9.5 5.7 3.4 79    2.0
27 e19  250  e23  e42  1000  32  21  7.8 4.4 3.0 17    2.1
28 e18  118  e25  e40  330  32  19  6.7 3.5 2.5 8.7 2.1
29 e17  81  e24  e90  ---  34  18  6.1 3.3 2.3 5.3 2.4
30 e16  61  e23  478  ---  34  17  8.2 3.1 2.1 3.6 2.8
 
31 e15  ---  e22  626  ---  33  ---  265    ---    2.2 2.7 ---   

TOTAL 4613 7134 1509 4251 8661 1664 3078 654.6 2842.4 221.4 1290.8 217.4
MEAN 149 238 48.7 137 309 53.7 103 21.1 94.7 7.14 41.6 7.25
MAX 922 1170 180 626 1150 123 1060 265 552 64 644 63
MIN 15 15 22 20 52 32 17 5.6 3.1 2.1 1.5 1.9
CFSM .97 1.54 .32 .89 2.01 .35 .67 .14 .62 .05 .27 .05
IN. 1.11 1.72 .36 1.03 2.09 .40 .74 .16 .69 .05 .31 .05
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1967 - 2001, BY WATER YEAR (WY)
MEAN 26.9 89.5 160 143 211 223 237 142 110 74.2 32.0 25.5
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 13.4 5.26 .91 1.44 .75 .093
(WY) 1972 1972 1977 1977 1978 1981 2000 1977 1988 1984 1971 1988

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1967 - 2001
ANNUAL TOTAL 54334.7       36136.6  
ANNUAL MEAN 148          99.0   122         
HIGHEST ANNUAL MEAN 244          1983
LOWEST ANNUAL MEAN 23.1       1980
HIGHEST DAILY MEAN 4500              Jun 25 1170          Nov 11 7740          Apr 12 1979
LOWEST DAILY MEAN 1.0   A     Jan 2 1.5       Aug 20 .00     B
ANNUAL SEVEN-DAY MINIMUM 1.8           Feb 5 1.8       Aug 14 .00     Sep 29 1968
MAXIMUM PEAK FLOW 1360          Feb 26 10600      C Apr 12 1979
MAXIMUM PEAK STAGE 13.29     Feb 26 17.94 D May 17 1990
INSTANTANEOUS LOW FLOW 1.3       Aug 19,20
ANNUAL RUNOFF (CFSM) .96     .64 .79    
ANNUAL RUNOFF (INCHES) 13.13     8.73 10.79    
10 PERCENT EXCEEDS 368          326      300         
50 PERCENT EXCEEDS 23          31      15         
90 PERCENT EXCEEDS 3.8       2.4   .79    

A - Estimated, but may have been less during periods of estimated discharges in Jan. and Feb.
B - Several days in 1967-68, 1973, 1988.
C - Gage height, 17.52 ft.
D - Discharge, 9,170 ft3/s.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data