Station list     Available data
ILLINOIS RIVER BASIN


05572000       SANGAMON RIVER AT MONTICELLO, IL



LOCATION.-- Lat 40°01'51", long 88°35'20", in NE1/4SW1/4 sec.12, T.18 N., R.5 E., Piatt County, Hydrologic Unit 07130006, on right downstream side of highway bridge, 0.5 mi west of Monticello, and at mile 162.2.

DRAINAGE AREA.-- 550 mi2.

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

DISCHARGE: February 1908 to December 1912, June 1914 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "near Monticello" 1910-12.
 

STAGE: Water years 1994-2001.
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1990-92 and 1998 to current.
 

MISCELLANEOUS: Contaminants in streambed sediments, July 1996; contaminants in fish tissue, July 1996; streambank sediment size, October 1997; streambed sediment size, October 1997.
BIOLOGICAL
 

BENTHIC MACROINVERTEBRATES: Water years 1996-1998.
 

FISH: Water years 1997 and 1998.
 

HABITAT: Water years 1996-1998.

REVISED RECORDS.-- WSP 525: 1920. WSP 1115: 1946-47. WSP 1208: 1915-16, 1918-20, 1927, 1929, 1939. WSP 1508: 1908(M), 1917, 1928(M). WDR IL-81-2: 1909(P), 1912(P), 1915(P), 1919-32(P), 1935(P), 1937-38(P), 1940-41(P), 1944(P), 1946-47(P). WDR IL-89-2: 1988.

GAGE.-- Water-stage recorder, phone telemeter, rain gage, and crest-stage gage. Datum of gage is 625.89 ft above sea level. Prior to Sept. 30, 1964, nonrecording gage at site 0.2 mi downstream at same datum. Oct. 1, 1964, to Oct. 22, 1971, nonrecording gage at present site and datum. Water temperature and specific conductance continuously recorded at station for the National Water-Quality Assessment Program.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 19,000 ft3/s, Oct. 4, 1926, gage height, 18.50 ft, from graph based on gage readings, site then in use; maximum gage height, 19.06 ft, Apr. 13, 1994, discharge, 15,900 ft3/s; no flow Aug. 28, Sept. 5, 11, 17, 18, Oct. 30, 31, Nov. 1, 1988.

REMARKS FOR CURRENT YEAR.-- Records good except those 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 14  23  108  e61  e2000  2860  299  170  210  103  17    38   
2 13  22  103  e60  e1900  2120  284  169  209  93  20    21   
3 11  22  98  e64  e1600  1490  268  167  227  107  17    61   
4 14  21  96  e68  e1200  1110  250  164  344  107  14    34   
5 29  20  95  e71  e850  917  242  162  449  116  12    20   
 
6 59  30  72  e72  702  790  246  154  707  121  12    14   
7 87  46  102  e71  671  683  253  174  1010  105  12    25   
8 74  63  105  69  731  606  565  177  1230  84  11    10   
9 60  92  79  64  1330  543  546  161  1310  91  11    15   
10 51  336  e82  59  2110  486  364  149  981  72  11    17   
 
11 43  490  e90  56  2500  449  337  148  676  64  9.6 20   
12 36  436  e110  54  2950  425  464  142  548  58  9.0 11   
13 31  350  e140  53  2400  418  734  130  463  51  8.6 10   
14 26  320  e190  61  1610  394  581  125  398  44  8.4 8.5
15 35  286  e170  104  1960  378  448  122  352  39  8.0 5.8
 
16 46  252  e150  149  2040  419  397  120  317  35  8.4 4.7
17 48  213  e130  e160  1890  548  367  121  281  36  7.8 4.6
18 48  177  e120  e150  1410  732  327  135  248  33  8.9 5.9
19 44  156  e110  e130  899  831  296  166  225  30  7.3 5.0
20 42  139  e100  e115  715  782  286  292  206  28  9.1 4.6
 
21 38  120  e95  e105  593  696  279  276  204  25  9.9 5.2
22 35  97  e90  e96  508  609  266  228  214  25  11    4.5
23 33  103  e85  e90  452  534  254  197  226  29  21    4.7
24 30  104  e80  e85  896  474  236  175  220  27  13    5.8
25 28  100  e75  e80  4670  425  225  161  186  23  12    4.9
 
26 26  108  e71  e76  5380  388  211  178  161  20  10    4.3
27 24  120  e68  e72  5950  358  203  184  141  20  13    3.9
28 21  124  e66  e68  4330  343  195  291  130  19  13    3.8
29 19  122  e64  142  ---  330  183  376  119  19  11    3.0
30 21  115  e63  1540  ---  320  173  288  112  18  13    2.9
 
31 26  ---  e62  e1800  ---  310  ---  233  ---  17  16    ---   

TOTAL 1112 4607 3069 5845 54247 21768 9779 5735 12104 1659 365.0 378.1
MEAN 35.9 154 99.0 189 1937 702 326 185 403 53.5 11.8 12.6
MAX 87 490 190 1800 5950 2860 734 376 1310 121 21 61
MIN 11 20 62 53 452 310 173 120 112 17 7.3 2.9
CFSM .07 .28 .18 .34 3.52 1.28 .59 .34 .73 .10 .02 .02
IN. .08 .31 .21 .40 3.67 1.47 .66 .39 .82 .11 .02 .03
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 2001, BY WATER YEAR (WY)
MEAN 172 240 340 418 580 713 805 717 500 282 149 114
MAX 2868 2842 2155 2636 1937 2472 2753 3609 2081 1585 1486 2427
(WY) 1927 1986 1928 1950 2001 1979 1922 1908 1974 1993 1981 1926
MIN 1.32 5.50 3.67 3.43 10.0 20.2 57.6 42.6 19.3 3.85 1.76 .48
(WY) 1989 1915 1964 1977 1931 1931 1931 1934 1934 1988 1988 1988

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1908 - 2001
ANNUAL TOTAL 48834.9   120668.1  
ANNUAL MEAN 133      331      416         
HIGHEST ANNUAL MEAN 1105          1927
LOWEST ANNUAL MEAN 68.0       1934
HIGHEST DAILY MEAN 1610          May 29 5950          Feb 27 18700          Oct 4 1926
LOWEST DAILY MEAN 5.9       Jan 29 2.9       Sep 30 .00     A
ANNUAL SEVEN-DAY MINIMUM 6.5       Jan 27 4.1       Sep 24 .07     Sep 11 1988
MAXIMUM PEAK FLOW 6170          Feb 27 19000      B Oct 4 1926
MAXIMUM PEAK STAGE 15.38     Feb 27 19.06 C Apr 13 1994
INSTANTANEOUS LOW FLOW 2.6       Sep 30
ANNUAL RUNOFF (CFSM) .24 .60 .76    
ANNUAL RUNOFF (INCHES) 3.30 8.16 10.27    
10 PERCENT EXCEEDS 292      733      1100         
50 PERCENT EXCEEDS 75      110      156         
90 PERCENT EXCEEDS 11      11      11         

A - Aug. 28, Sept. 5, 11, 17, 18, Oct. 30 to Nov. 1, 1988.
B - Gage height, 18.50 ft, from graph based on gage readings, site then in use.
C - Discharge, 15,900 ft3/s.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data