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
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 .82 .57 1.0   6.7 e4.4 25    18  157  412  244  38      .26
2 1.1   .56 .95 7.5 e4.5 21    18  222  468  211  35      .21
3 1.2   .58 1.1   8.0 e4.6 17    15  324  380  216  34      .22
4 .74 .74 2.3   8.6 e4.7 13    12  286  297  383  28      .22
5 1.0   .84 11      8.5 e4.8 11    21  240  269  1650  23      .18
 
6 1.7   .88 22      8.3 e4.9 11    14  204  236  2260  21      .17
7 2.3   .91 19      8.1 e5.1 9.5 22  182  200  1320  20      .21
8 2.0   .88 14      8.0 5.3 9.3 24  173  175  748  17      .24
9 3.1   .87 11      9.4 5.4 6.0 32  173  164  508  21      .29
10 5.4   .78 8.9   10    5.8 6.8 50  218  149  627  18      .30
 
11 4.2   .73 9.3   8.4 6.3 6.7 56  251  140  1680  16      .85
12 .97 .76 9.1   8.8 7.0 7.1 48  215  134  1200  13      2.1  
13 .72 .81 8.7   7.6 8.1 7.3 36  181  154  732  11      .45
14 .78 .77 9.2   7.9 9.5 7.2 30  152  510  500  9.1   1.5  
15 .64 .81 11      7.5 10    7.5 25  128  1130  375  6.7   .56
 
16 .73 .82 9.8   7.2 10    9.5 25  119  1090  278  5.2   .35
17 .94 .89 10      7.0 11    14    25  121  668  212  3.8   .29
18 .98 .89 9.9   6.2 17    15    32  126  453  168  2.3   .27
19 .89 .80 9.6   6.6 22    22    50  282  347  146  1.9   .23
20 .82 .75 7.8   e6.5 24    31    93  447  314  133  1.5   .77
 
21 .81 .82 6.9   e6.1 24    43    956  347  1780  116  .91 .65
22 .72 1.0   6.8   e5.7 33    65    826  264  2230  100  .65 .43
23 .71 2.4   6.6   e5.4 52    66    506  228  1210  87  .51 .98
24 .76 1.1   6.4   e5.0 99    56    406  200  836  75  .37 1.5  
25 .76 1.3   6.4   e4.7 102    48    504  167  856  66  .27 1.2  
 
26 .76 1.5   6.1   e4.4 79    41    405  143  694  59  .27 .86
27 .79 1.1   6.1   e4.2 59    29    300  230  505  52  .28 .64
28 .68 1.0   5.9   e3.9 48    36    243  566  402  48  .92 .60
29 .75 .95 5.7   e4.0 37    32    206  523  344  63  .74 .58
30 .63 1.0   5.6   e4.2 ---    25    170  397  291  49  .49 .58
 
31 .57 ---      6.1   e4.3 ---    21    ---  331  ---  39  .36 ---     

TOTAL 38.97 27.81 254.25 208.7 707.4 718.9 5168 7597 16838 14345 331.27 17.69
MEAN 1.26 .93 8.20 6.73 24.4 23.2 172 245 561 463 10.7 .59
MAX 5.4 2.4 22 10 102 66 956 566 2230 2260 38 2.1
MIN .57 .56 .95 3.9 4.4 6.0 12 119 134 39 .27 .17
CFSM .00 .00 .01 .01 .04 .04 .30 .42 .97 .80 .02 .00
IN. .00 .00 .02 .01 .05 .05 .33 .49 1.08 .92 .02 .00

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1943 - 2000, BY WATER YEAR (WY)
MEAN 135 228 335 370 490 740 812 727 560 325 124 121
MAX 1682 2327 2773 1981 1758 3123 2801 2968 2232 2350 1186 1540
(WY) 1994 1986 1983 1993 1997 1979 1957 1943 1980 1951 1943 1989
MIN .000 .93 4.58 3.03 6.71 23.2 109 71.1 27.0 .000 .000 .000
(WY) 1989 2000 1954 1977 1963 2000 1977 1964 1988 1988 1988 1988

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1943 - 2000
ANNUAL TOTAL 133503.25 46252.99
ANNUAL MEAN 366      126      413     
HIGHEST ANNUAL MEAN 1094      1993
LOWEST ANNUAL MEAN 49.7   1964
HIGHEST DAILY MEAN 6370          Apr 17 2260          Jul 6 12300      Dec 4 1982
LOWEST DAILY MEAN .17     Sep 11, 25 .17     Sep 6 .00 A
ANNUAL SEVEN-DAY MINIMUM .20     Sep 21 .21     Sep 2 .00 Jul 1 1988
INSTANTANEOUS PEAK FLOW 2690          Jun 22 13100      Dec 4 1982
INSTANTANEOUS PEAK STAGE 7.75     Jun 22 19.16 Dec 4 1982
INSTANTANEOUS LOW FLOW .12     B
ANNUAL RUNOFF (CFSM) .63 .22 .71
ANNUAL RUNOFF (INCHES) 8.58 2.97 9.70
10 PERCENT EXCEEDS 1010      381      1060     
50 PERCENT EXCEEDS 38      9.5   130     
90 PERCENT EXCEEDS .74 .67 6.4  
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