Station list     Available data
ILLINOIS RIVER BASIN


05555300       VERMILION RIVER NEAR LEONORE, IL



LOCATION.-- Lat 41°12'30", long 88°55'51", in SW1/4SW1/4 sec.30, T.32 N., R.3 E., La Salle County, Hydrologic Unit 07130002, on left downstream side of bridge on County Highway 57 (Red, White and Blue Bridge Road), 3 mi northeast of Leonore, 6.2 mi downstream from Otter Creek, 8 mi northwest of Streator, and at mile 17.2.

DRAINAGE AREA.-- 1,251 mi2.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: May 1931 to current year. Prior to October 1971, published as "at Lowell."
 

STAGE: Water years 1994-2000.
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1978 to 1991.
 

SEDIMENT: June 1980 to September 1981.
 

MISCELLANEOUS: Contaminants in streambed sediments, July 1996; contaminants in fish tissue, July 1996.

REVISED RECORDS.-- WSP 745: 1931-32. WSP 1308: 1932(M), 1935-38(M), 1940(M), 1942(M). WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 520.58 ft above sea level. Prior to Aug. 20, 1952, nonrecording gage at site 6.8 mi downstream at datum 19.97 ft lower. Aug. 20, 1952 to Sept. 30, 1971, nonrecording gage at site 6.7 mi downstream at datum 19.97 ft lower.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 33,500 ft3/s, July 15, 1958, gage height, 15.30 ft, from graph based on gage readings, site and datum then in use; maximum gage height, 27.13 ft, Dec. 4, 1982, present site; minimum discharge, 2.6 ft3/s, Aug. 3, 1988.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 6,730 mg/L Aug. 15, 1981; minimum daily mean, 1 mg/L Feb. 5, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 209,000 tons Aug. 15, 1981; minimum daily, 0.24 ton Feb. 5, 1981.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 13    14  12  20  e12  74  49  281  2130  602  102  14 
2 12    14  11  23  e12  61  46  277  1460  503  97  14 
3 15    14  15  24  e13  49  47  322  984  476  96  13 
4 28    14  39  27  e13  40  45  408  720  786  81  13 
5 16    14  76  25  e13  37  40  367  586  2980  73  12 
 
6 12    13  46  21  e14  31  39  322  500  3560  80  12 
7 11    13  21  18  e14  26  36  284  429  2750  83  13 
8 10    12  17  17  e14  22  55  269  375  1670  54  13 
9 11    15  16  20  e15  23  56  377  334  1100  78  13 
10 11    15  16  24  e16  21  51  361  306  2760  61  13 
 
11 9.9 14  16  25  e17  17  60  379  284  2480  52  15 
12 9.8 15  15  26  19  17  78  400  274  2300  41  47 
13 9.9 16  15  27  19  15  80  376  2020  1510  36  28 
14 8.2 15  21  26  19  15  70  331  1420  1000  32  22 
15 9.1 14  27  24  19  16  61  283  1370  706  29  24 
 
16 10    14  28  24  22  23  57  245  1870  530  26  17 
17 12    14  24  20  29  30  72  227  1370  412  24  15 
18 12    14  23  22  38  27  55  247  870  339  23  15 
19 12    14  19  20  49  32  72  662  613  298  20  15 
20 11    13  22  e18  55  55  204  1020  554  263  18  16 
 
21 12    13  24  e16  67  71  365  828  1370  235  17  22 
22 13    14  18  e15  86  93  1310  599  3500  204  18  19 
23 12    16  16  e13  125  116  921  472  2640  174  19  23 
24 11    16  e16  e12  198  116  677  405  2690  152  18  30 
25 11    15  e15  e11  224  96  651  344  4690  134  17  25 
 
26 11    14  e15  e10  210  78  691  298  2700  118  16  20 
27 12    15  e14  e10  168  73  527  337  1730  108  16  18 
28 13    14  e14  e10  123  71  414  676  1190  101  16  17 
29 13    13  e16  e11  90  62  350  1020  907  90  17  16 
30 13    13  17  e11  ---  60  304  787  730  140  15  16 
 
31 13    ---  18  e12  ---  56  ---  851  ---  137  13  --- 

TOTAL 376.9 424 662 582 1713 1523 7483 14055 40616 28618 1288 550
MEAN 12.2 14.1 21.4 18.8 59.1 49.1 249 453 1354 923 41.5 18.3
MAX 28 16 76 27 224 116 1310 1020 4690 3560 102 47
MIN 8.2 12 11 10 12 15 36 227 274 90 13 12
CFSM .01 .01 .02 .02 .05 .04 .20 .36 1.08 .74 .03 .01
IN. .01 .01 .02 .02 .05 .05 .22 .42 1.21 .85 .04 .02

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1972 - 2000, BY WATER YEAR (WY)
MEAN 441 743 1023 928 1249 2078 1889 1619 1358 722 343 417
MAX 3188 4978 6201 4259 3681 7649 5098 5152 4442 2966 2678 3997
(WY) 1987 1986 1983 1993 1997 1979 1982 1995 1980 1993 1981 1993
MIN 11.4 11.4 11.4 6.36 40.9 49.1 208 241 78.5 8.83 6.89 11.8
(WY) 1972 1972 1977 1977 1977 2000 1977 1992 1988 1988 1988 1999

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1972 - 2000
ANNUAL TOTAL 287155.5   97890.9  
ANNUAL MEAN 787      267      1066     
HIGHEST ANNUAL MEAN 2419      1993
LOWEST ANNUAL MEAN 267      2000
HIGHEST DAILY MEAN 10400          Jun 14 4690          Jun 25 30000      Dec 4 1982
LOWEST DAILY MEAN 7.6       Sep 24 8.2       Oct 14 2.6   Aug 3 1988
ANNUAL SEVEN-DAY MINIMUM 8.7       Sep 21 9.7       Oct 10 3.0   Jul 30 1988
INSTANTANEOUS PEAK FLOW 5780          Jun 25 31800      Dec 4 1982
INSTANTANEOUS PEAK STAGE 12.00     Jun 25 27.13 Dec 4 1982
INSTANTANEOUS LOW FLOW 7.1       Oct 14 2.6   Aug 3 1988
ANNUAL RUNOFF (CFSM) .63 .21 .85
ANNUAL RUNOFF (INCHES) 8.54 2.91 11.58
10 PERCENT EXCEEDS 2230      747      2660     
50 PERCENT EXCEEDS 70      26      397     
90 PERCENT EXCEEDS 11      12      25     


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data