Station list     Available data
ILLINOIS RIVER BASIN


05554500       VERMILION RIVER AT PONTIAC, IL



LOCATION.-- Lat 40°52'40", long 88°38'10", in SE1/4SW1/4 sec.22, T.28 N., R.5 E., Livingston County, Hydrologic Unit 07130002, near center of span on downstream side of bridge on Vermilion Street in Pontiac, 0.1 mi upstream from State Highway 116, 0.8 mi upstream from Turtle Creek, and at mile 60.3.

DRAINAGE AREA.-- 579 mi2.

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

DISCHARGE: October 1942 to current year.

 

STAGE: Water years 1994-2000.


REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-83-2: 1951, 1957, 1965(M), 1968, 1970, 1980. WDR IL-98: 1997 (P).

GAGE.-- Water-stage recorder and U.S. Army Corps of Engineers satellite telemeter. Datum of gage is 619.45 ft above sea level. Prior to Nov. 8, 1965, nonrecording gage at same site and datum.

REMARKS.-- An average of 3 ft3/s, diverted 0.5 mi upstream from station for water supply of city of Pontiac, is not included in records.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 13,100 ft3/s, Dec. 4, 1982, gage height; 19.16 ft; no flow for many days in 1953, 1983-84, 1986-91.

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
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
1.82.571.0  6.7e4.425   18 157 412 244 38     .26
21.1  .56.957.5e4.521   18 222 468 211 35     .21
31.2  .581.1  8.0e4.617   15 324 380 216 34     .22
4.74.742.3  8.6e4.713   12 286 297 383 28     .22
51.0  .8411     8.5e4.811   21 240 269 1650 23     .18
 
61.7  .8822     8.3e4.911   14 204 236 2260 21     .17
72.3  .9119     8.1e5.19.522 182 200 1320 20     .21
82.0  .8814     8.05.39.324 173 175 748 17     .24
93.1  .8711     9.45.46.032 173 164 508 21     .29
105.4  .788.9  10   5.86.850 218 149 627 18     .30
 
114.2  .739.3  8.46.36.756 251 140 1680 16     .85
12.97.769.1  8.87.07.148 215 134 1200 13     2.1  
13.72.818.7  7.68.17.336 181 154 732 11     .45
14.78.779.2  7.99.57.230 152 510 500 9.1  1.5  
15.64.8111     7.510   7.525 128 1130 375 6.7  .56
 
16.73.829.8  7.210   9.525 119 1090 278 5.2  .35
17.94.8910     7.011   14   25 121 668 212 3.8  .29
18.98.899.9  6.217   15   32 126 453 168 2.3  .27
19.89.809.6  6.622   22   50 282 347 146 1.9  .23
20.82.757.8  e6.524   31   93 447 314 133 1.5  .77
 
21.81.826.9  e6.124   43   956 347 1780 116 .91.65
22.721.0  6.8  e5.733   65   826 264 2230 100 .65.43
23.712.4  6.6  e5.452   66   506 228 1210 87 .51.98
24.761.1  6.4  e5.099   56   406 200 836 75 .371.5  
25.761.3  6.4  e4.7102   48   504 167 856 66 .271.2  
 
26.761.5  6.1  e4.479   41   405 143 694 59 .27.86
27.791.1  6.1  e4.259   29   300 230 505 52 .28.64
28.681.0  5.9  e3.948   36   243 566 402 48 .92.60
29.75.955.7  e4.037   32   206 523 344 63 .74.58
30.631.0  5.6  e4.2---   25   170 397 291 49 .49.58
 
31.57---     6.1  e4.3---   21   --- 331 --- 39 .36---     

TOTAL38.9727.81254.25208.7707.4718.9516875971683814345331.2717.69
MEAN1.26.938.206.7324.423.217224556146310.7.59
MAX5.42.422101026695656622302260382.1
MIN.57.56.953.94.46.01211913439.27.17
CFSM.00.00.01.01.04.04.30.42.97.80.02.00
IN..00.00.02.01.05.05.33.491.08.92.02.00

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1943 - 2000, BY WATER YEAR (WY)
MEAN135228335370490740812727560325124121
MAX168223272773198117583123280129682232235011861540
(WY)199419861983199319971979195719431980195119431989
MIN.000.934.583.036.7123.210971.127.0.000.000.000
(WY)198920001954197719632000197719641988198819881988

SUMMARY STATISTICSFOR 1999 CALENDAR YEARFOR 2000 WATER YEARWATER YEARS 1943 - 2000
ANNUAL TOTAL133503.2546252.99
ANNUAL MEAN366     126     413     
HIGHEST ANNUAL MEAN1094     1993
LOWEST ANNUAL MEAN49.7  1964
HIGHEST DAILY MEAN6370         Apr 172260         Jul 612300     Dec 4 1982
LOWEST DAILY MEAN.17    Sep 11, 25.17    Sep 6.00A
ANNUAL SEVEN-DAY MINIMUM.20    Sep 21.21    Sep 2.00Jul 1 1988
INSTANTANEOUS PEAK FLOW2690         Jun 2213100     Dec 4 1982
INSTANTANEOUS PEAK STAGE7.75    Jun 2219.16Dec 4 1982
INSTANTANEOUS LOW FLOW.12    B
ANNUAL RUNOFF (CFSM).63.22.71
ANNUAL RUNOFF (INCHES)8.582.979.70
10 PERCENT EXCEEDS1010     381     1060     
50 PERCENT EXCEEDS38     9.5  130     
90 PERCENT EXCEEDS.74.676.4  
A - Many days in 1953, 1983-84, 1986-91.
B - Sept. 5, 6, 19.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data