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 1994-2000.
SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1990-92 and 1998.
 

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, September 1996, September 1997, and September 1998; fish, July 1997 and July 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 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 13    5.1 5.7 11    e6.7 138  98  160  542  292  28  12   
2 10    5.2 5.7 12    e7.1 124  94  155  422  252  23  10   
3 14    4.8 5.7 19    e7.4 113  94  141  343  222  22  8.5
4 16    4.4 5.4 19    e8.2 107  92  142  308  200  24  7.7
5 15    4.5 11    21    e9.0 98  85  133  375  244  22  7.8
 
6 14    5.2 23    20    e9.5 91  84  123  326  244  19  7.0
7 13    5.6 25    19    e9.8 85  80  118  270  272  18  6.7
8 22    6.1 28    17    10    80  77  115  235  219  17  6.6
9 20    6.1 27    18    11    79  69  119  206  175  16  6.2
10 18    6.1 22    17    15    72  67  157  187  154  15  13   
 
11 17    5.8 17    16    28    67  77  170  180  157  14  24   
12 15    6.2 15    15    35    68  80  179  184  150  12  24   
13 13    5.7 14    14    45    66  71  288  491  133  11  23   
14 12    4.5 16    13    46    66  70  236  469  113  12  27   
15 10    5.6 18    12    45    64  69  181  429  99  12  26   
 
16 8.9 6.5 18    11    44    62  69  153  314  86  11  21   
17 8.3 6.6 18    11    37    58  94  139  243  75  11  15   
18 8.7 6.2 18    11    126    52  140  134  202  66  13  12   
19 7.6 6.1 18    11    367    63  143  147  176  61  13  11   
20 7.3 5.9 18    11    351    145  143  138  179  54  11  9.7
 
21 6.7 5.5 15    11    301    261  161  224  625  49  11  8.4
22 6.2 5.4 15    9.5 241    306  218  214  821  43  16  8.2
23 5.6 6.5 13    9.7 212    262  293  188  1010  38  30  7.6
24 5.2 6.3 12    9.5 196    217  292  165  1510  33  220  9.6
25 5.1 5.7 11    8.3 176    189  321  146  1380  30  79  17   
 
26 5.1 5.5 10    7.5 159    165  280  133  1060  27  43  19   
27 4.7 4.9 10    7.0 152    162  254  356  761  25  33  30   
28 4.7 4.6 10    6.5 144    150  222  1160  547  23  23  29   
29 4.6 5.6 11    5.9 140    134  193  1610  426  20  20  22   
30 3.8 5.9 12    e6.0 ---    119  171  1200  346  25  18  17   
 
31 3.9 ---    12    e6.3 ---    108  ---  758  ---  43  15  ---   

TOTAL 318.4 168.1 459.5 385.2 2938.7 3771 4201 9282 14567 3624 832 446.0
MEAN 10.3 5.60 14.8 12.4 101 122 140 299 486 117 26.8 14.9
MAX 22 6.6 28 21 367 306 321 1610 1510 292 220 30
MIN 3.8 4.4 5.4 5.9 6.7 52 67 115 176 20 11 6.2
CFSM .02 .01 .03 .02 .18 .22 .25 .54 .88 .21 .05 .03
IN. .02 .01 .03 .03 .20 .26 .28 .63 .99 .25 .06 .03

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 2000, BY WATER YEAR (WY)
MEAN 174 241 343 421 565 713 811 723 501 285 150 115
MAX 2868 2842 2155 2636 1899 2472 2753 3609 2081 1585 1486 2427
(WY) 1927 1986 1928 1950 1959 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 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1908 - 2000
ANNUAL TOTAL 111447.8   40992.9  
ANNUAL MEAN 305      112      417         
HIGHEST ANNUAL MEAN 1105          1927
LOWEST ANNUAL MEAN 68.0       1934
HIGHEST DAILY MEAN 3410          Apr 19 1610          May 29 18700          Oct 4 1926
LOWEST DAILY MEAN 3.8       Oct 30 3.8       Oct 30 .00     A
ANNUAL SEVEN-DAY MINIMUM 4.5       Oct 30 4.5       Oct 30 .07     Sep 11 1988
INSTANTANEOUS PEAK FLOW 1680          May 29 19000      B Oct 4 1926
INSTANTANEOUS PEAK STAGE 11.82     May 29 19.06 C Apr 13 1994
INSTANTANEOUS LOW FLOW 3.6       D
ANNUAL RUNOFF (CFSM) .56 .20 .76    
ANNUAL RUNOFF (INCHES) 7.54 2.77 10.30    
10 PERCENT EXCEEDS 776      271      1100         
50 PERCENT EXCEEDS 67      24      157         
90 PERCENT EXCEEDS 6.1   6.1   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 them in use.
 C - Discharge, 15,900 ft3/s.
 D - Oct. 31 to Nov. 1.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data