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 1994-1995; 1999-2001.
 

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, water-quality monitor, 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 fair except 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 .55 5.4 248  e89  e1500  864  203  109  645  52      .28 23   
2 .44 7.0 248  e94  e1250  687  183  106  862  42      .96 12   
3 .58 8.5 243  e98  1120  561  172  96  550  42      1.2   6.4
4 18      8.6 234  e100  690  485  157  88  384  611      .74 5.1
5 67      10    e208  e102  528  418  154  85  1470  410      .57 3.8
 
6 43      12    e190  e103  465  349  189  86  8470  211      .28 4.4
7 47      107    e175  e99  e1000  326  252  89  5800  123      .08 5.6
8 43      123    e165  e92  e1750  300  263  85  2490  102      .01 11   
9 33      242    e153  e86  e9250  272  226  79  1590  96      .01 7.8
10 26      1160    e128  e82  9280  246  233  81  1110  104      .02 13   
 
11 24      803    e124  e82  2860  244  407  94  820  81      .00 19   
12 11      512    e145  e85  1740  238  439  95  638  50      .00 7.1
13 11      426    e139  e90  1440  293  346  80  519  35      .00 4.9
14 10      455    e125  e95  1530  290  228  79  423  26      .00 3.5
15 9.3   367    e110  e104  2130  293  203  89  357  19      .00 3.0
 
16 5.7   302    e98  e120  1610  561  195  98  309  13      .00 2.5
17 6.3   252    e90  e149  1130  1130  164  104  260  8.5   .00 2.4
18 8.2   202    e82  e169  863  1310  138  102  233  18      9.0   2.8
19 8.9   180    e78  e181  706  984  131  100  216  19      28      135   
20 7.8   169    e74  e180  597  742  144  108  189  9.5   13      161   
 
21 6.9   141    e72  e162  462  594  150  103  179  5.9   5.3   140   
22 6.0   e143    e68  e152  435  485  169  114  189  4.2   4.6   85   
23 5.3   e127    e66  e146  379  410  205  111  164  3.1   60      67   
24 5.9   e119    e64  e140  741  356  201  96  134  2.4   60      90   
25 6.6   110    e63  e135  6810  299  168  87  113  1.9   63      71   
 
26 7.6   128    e63  e135  3550  266  150  101  98  1.6   64      56   
27 8.0   149    e65  e135  1740  258  141  272  86  1.3   52      48   
28 7.7   155    e69  e140  1200  234  121  353  71  .92 26      37   
29 13      156    e73  e155  ---  233  107  254  63  .73 13      29   
30 8.3   204    e78  e400  ---  219  105  198  59  .56 8.4   24   
 
31 5.5   ---    e84  e1760  ---  209  ---  186  ---  .35 12      ---   

TOTAL 461.57 6783.5 3822 5660 56756 14156 5944 3728 28491 2094.96 422.45 1080.3
MEAN 14.9 226 123 183 2027 457 198 120 950 67.6 13.6 36.0
MAX 67 1160 248 1760 9280 1310 439 353 8470 611 64 161
MIN .44 5.4 63 82 379 209 105 79 59 .35 .00 2.4
CFSM .03 .50 .27 .40 4.45 1.00 .44 .26 2.09 .15 .03 .08
IN. .04 .55 .31 .46 4.64 1.16 .49 .30 2.33 .17 .03 .09
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2001, BY WATER YEAR (WY)
MEAN 138 232 300 304 447 651 684 517 473 219 91.2 161
MAX 1148 2264 2398 1399 2027 3378 2316 2765 1776 1551 1406 2494
(WY) 1942 1986 1983 1950 2001 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 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1940 - 2001
ANNUAL TOTAL 58882.84 129399.78
ANNUAL MEAN 161      355      350         
HIGHEST ANNUAL MEAN 819          1993
LOWEST ANNUAL MEAN 20.6       1940
HIGHEST DAILY MEAN 3080          Jul 11 9280          Feb 10 19400          Dec 4 1982
LOWEST DAILY MEAN .00     Sep 5-10 .00     A .00     B
ANNUAL SEVEN-DAY MINIMUM .00     Sep 4 .00     Aug 11 .00     B
MAXIMUM PEAK FLOW 12600          Feb 10 22400      C Dec 4 1982
MAXIMUM PEAK STAGE 14.10     Feb 10 19.70     Jul 15 1958
ANNUAL RUNOFF (CFSM) .35 .78 .77    
ANNUAL RUNOFF (INCHES) 4.81 10.58 10.46    
10 PERCENT EXCEEDS 376      720      865         
50 PERCENT EXCEEDS 37      107      92         
90 PERCENT EXCEEDS 2.0   4.3   1.6      

A - Several days.
B - At times in many years.
C - Gage height, 19.51 ft.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data