Station list     Available data
ILLINOIS RIVER BASIN


05542000       MAZON RIVER NEAR COAL CITY, IL



LOCATION.-- Lat 41°17'10", long 88°21'35", in SW1/4SW1/4 sec.31, T.33 N., R.8 E., Grundy County, Hydrologic Unit 07120005, on right bank at downstream side of bridge on State Highway 113, 0.3 mi downstream from Johnny Run, 3 mi west of Coal City, and at mile 15.0.

DRAINAGE AREA.-- 455 mi2.

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

DISCHARGE: October 1939 to September 1995. October 1998 to current year.
 

STAGE: Water years 1994-1996;1999-2000.
 

PARTIAL RECORD: Annual maximum, water years 1997-98.
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1978-91.

REVISED RECORDS.-- WSP 1035: 1943(P). WSP 1115: 1946. 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 527.41 ft. above sea level. Prior to Apr. 30, 1940, and October 1996 to September 1998, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 22,400 ft3/s, Dec. 4, 1982, gage height, 19.51 ft; maximum gage height, 19.70 ft, July 15, 1958; no flow at times in many years.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of Aug. 8, 1924 reached a stage of about 21 ft, discharge not determined.

REMARKS FOR CURRENT YEAR.-- Records good except those for Apr. 5 to Sept. 30, which are fair; and those for Mar. 9 to Apr. 4 and 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 1.1   .54 1.7 3.6 e3.1 23    13    110  1430  291  53      .34
2 1.3   .62 1.6 4.0 e3.2 18    12    153  1150  253  59      .16
3 2.5   .81 1.9 4.4 e3.3 12    12    178  650  246  45      .09
4 3.8   1.0   2.7 4.9 e3.4 8.9 e10    159  472  235  30      .03
5 6.4   1.0   16    4.5 e3.5 7.5 8.8 144  415  427  25      .00
 
6 4.2   .77 32    4.5 e3.6 6.3 8.7 127  352  472  52      .00
7 2.6   .67 17    4.1 e3.7 5.6 12    118  291  291  195      .00
8 1.8   .65 10    3.8 e3.7 5.5 20    117  267  212  110      .00
9 1.5   .59 7.2 4.5 e3.9 4.1 30    133  245  174  71      .00
10 1.0   .59 5.7 6.3 e4.1 2.2 46    206  218  1260  54      .00
 
11 .76 .58 4.7 7.3 e4.5 3.0 44    295  207  3080  38      .07
12 .52 .63 4.0 7.1 e5.0 2.9 40    264  233  1220  28      1.1  
13 .42 .81 3.6 6.6 e5.7 3.4 35    292  673  665  21      6.0  
14 .31 .95 3.6 5.3 e6.3 3.3 30    274  1320  431  15      4.8  
15 .27 .85 4.4 5.0 e6.6 5.0 25    212  1690  308  9.0   3.0  
 
16 .35 .76 4.7 4.9 e7.0 11    27    185  1070  234  6.1   2.4  
17 .37 1.0   4.3 4.6 e7.4 14    71    178  649  181  4.9   2.6  
18 .49 1.2   4.3 4.6 e7.9 14    75    175  464  144  4.5   1.0  
19 .56 2.0   4.1 e4.5 e8.4 13    72    432  372  127  2.8   .78
20 .55 1.8   4.1 e4.3 e9.2 21    106    429  332  114  2.2   .64
 
21 .49 1.4   2.9 e4.0 e11    52    391    294  2120  95  1.9   .61
22 .54 1.5   2.7 e3.6 19    73    353    240  2410  79  1.7   .62
23 .51 1.8   2.5 e3.3 61    61    274    214  969  62  1.6   1.1  
24 .51 2.0   e2.4 e3.0 118    41    230    190  894  51  1.3   2.0  
25 .42 2.1   e2.3 e2.7 111    32    259    161  2290  43  .95 2.0  
 
26 .37 2.6   e2.4 e2.6 82    26    213    138  1480  36  .68 2.3  
27 .42 2.5   e2.6 e2.6 59    26    169    161  846  30  .66 1.9  
28 .89 2.3   e2.8 e2.7 42    23    146    290  567  25  .57 1.4  
29 .74 2.1   3.1 e2.8 30    21    127    384  441  28  .57 1.1  
30 .67 1.8   3.4 e2.9 ---    19    110    301  348  52  .45 .78
 
31 .58 ---      3.5 e3.0 ---    17    ---    295  ---  50  .37 ---     

TOTAL 36.94 37.92 168.2 132.0 636.5 574.7 2969.5 6849 24865 10916 836.25 36.82
MEAN 1.19 1.26 5.43 4.26 21.9 18.5 99.0 221 829 352 27.0 1.23
MAX 6.4 2.6 32 7.3 118 73 391 432 2410 3080 195 6.0
MIN .27 .54 1.6 2.6 3.1 2.2 8.7 110 207 25 .37 .00
CFSM .00 .00 .01 .01 .05 .04 .22 .49 1.82 .77 .06 .00
IN. .00 .00 .01 .01 .05 .05 .24 .56 2.03 .89 .07 .00

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2000, BY WATER YEAR (WY)
MEAN 140 232 303 307 420 654 693 524 465 221 92.5 163
MAX 1148 2264 2398 1399 1489 3378 2316 2765 1776 1551 1406 2494
(WY) 1942 1986 1983 1950 1984 1979 1950 1943 1980 1958 1972 1989
MIN .000 .15 .10 .10 .56 2.14 26.7 46.7 13.9 .40 .58 .000
(WY) 1940 1957 1940 1940 1940 1940 1940 1956 1988 1988 1947 1946

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1940 - 2000
ANNUAL TOTAL 119043.20 48058.83
ANNUAL MEAN 326      131      350         
HIGHEST ANNUAL MEAN 819          1993
LOWEST ANNUAL MEAN 20.6       1940
HIGHEST DAILY MEAN 9220          Jun 14 3080          Jul 11 19400          Dec 4 1982
LOWEST DAILY MEAN .27     Oct 15 .00     Sep 5-10 .00     A
ANNUAL SEVEN-DAY MINIMUM .39     Oct 12 .00     Sep 4 .00     A
INSTANTANEOUS PEAK FLOW 3830          Jul 11 22400      B Dec 4 1982
INSTANTANEOUS PEAK STAGE 7.59     Jul 11 19.70     Jul 15 1958
ANNUAL RUNOFF (CFSM) .72 .29 .77    
ANNUAL RUNOFF (INCHES) 9.73 3.93 10.46    
10 PERCENT EXCEEDS 914      315      867         
50 PERCENT EXCEEDS 10      6.3   92         
90 PERCENT EXCEEDS .58 .60 1.6      
A - At times in many years.
B - Gage height, 19.51 ft.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data