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.--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.

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 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.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Recording raingage and gage-height telemeter at station. Water temperature and specific conductance continuously recorded at station for the National Water-Quality Assessment Program.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 12    16    11    e8.0 573  293  189  480  235  374  34  19   
2 12    26    11    e10    751  314  188  436  531  349  31  18   
3 9.6 29    11    e9.0 822  442  189  409  909  446  28  17   
4 9.1 28    11    e8.0 784  625  192  384  1120  377  26  16   
5 11    24    11    e7.5 613  613  184  375  1560  288  25  15   
 
6 13    21    11    e8.5 471  554  197  359  1310  239  24  14   
7 12    19    12    e9.5 671  559  190  353  971  206  25  15   
8 13    18    11    e9.0 1500  553  192  316  700  181  40  14   
9 12    19    11    e8.5 1850  519  272  282  543  161  29  14   
10 17    22    10    e8.1 1860  459  322  261  455  144  23  13   
 
11 14    19    9.6 e7.8 1710  397  406  247  405  128  22  13   
12 13    21    9.3 e7.5 1370  359  411  240  364  115  36  13   
13 12    22    8.7 e7.2 1100  386  370  300  558  103  418  13   
14 11    32    8.7 e7.1 824  413  312  444  876  94  148  13   
15 11    29    8.2 e7.0 635  417  439  587  967  86  69  12   
 
16 10    26    7.9 e7.0 552  428  1330  565  1080  77  52  11   
17 8.8 23    7.6 e9.0 510  471  2270  489  1030  74  39  11   
18 9.8 20    7.7 e15    484  486  3190  472  628  69  32  9.1
19 11    18    9.2 23    446  447  3410  455  451  64  29  8.9
20 11    16    7.9 26    395  377  2760  402  378  67  26  10   
 
21 11    15    9.5 38    347  340  2200  359  334  78  25  10   
22 11    15    9.1 175    311  315  1590  448  300  61  23  9.6
23 11    14    9.0 902    293  291  1120  413  301  52  23  9.2
24 12    13    8.9 2030    279  268  859  367  485  47  24  8.9
25 12    12    7.6 2890    270  247  730  330  802  43  25  8.6
 
26 15    10    7.2 2410    253  228  647  299  838  39  41  8.3
27 14    9.5 6.6 1980    251  213  611  268  771  48  32  8.5
28 14    9.3 6.2 1310    259  206  686  245  684  44  40  15   
29 14    9.2 6.0 891    ---  202  633  229  559  51  32  13   
30 14    11    5.1 674    ---  193  538  218  433  48  26  13   
 
31 13    ---    e6.0 528    ---  187  ---  214  ---  39  22  ---   

TOTAL 373.3 566.0 276.0 14030.7 20184 11802 26627 11246 20578 4192 1469 373.1
MEAN 12.0 18.9 8.90 453 721 381 888 363 686 135 47.4 12.4
MAX 17 32 12 2890 1860 625 3410 587 1560 446 418 19
MIN 8.8 9.2 5.1 7.0 251 187 184 214 235 39 22 8.3
CFSM .02 .03 .02 .82 1.31 .69 1.61 .66 1.25 .25 .09 .02
IN. .03 .04 .02 .95 1.37 .80 1.80 .76 1.39 .28 .10 .03

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 1999, BY WATER YEAR (WY)
MEAN 176 244 350 425 570 712 818 728 501 290 153 118
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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1908 - 1999
ANNUAL TOTAL 240903.3   111717.1      
ANNUAL MEAN 660      306          420         
HIGHEST ANNUAL MEAN 1105          1927
LOWEST ANNUAL MEAN 68.0       1934
HIGHEST DAILY MEAN 6160          Jun 19 3410              Apr 19 18700          Oct 4 1926
LOWEST DAILY MEAN 5.1       Dec 30 5.1           Dec 30 .00     A
ANNUAL SEVEN-DAY MINIMUM 6.4       Dec 25 6.4           Dec 25 .07     Sep 11 1988
INSTANTANEOUS PEAK FLOW 3610              Apr 19 19000      B Oct 4 1926
INSTANTANEOUS PEAK STAGE 13.73         Apr 19 19.06 C Apr 13 1994
INSTANTANEOUS LOW FLOW 2.7   D     Dec 30
ANNUAL RUNOFF (CFSM) 1.20 .56     .76    
ANNUAL RUNOFF (INCHES) 16.29 7.56     10.38    
10 PERCENT EXCEEDS 2020      776          1100         
50 PERCENT EXCEEDS 261      67          160         
90 PERCENT EXCEEDS 11      9.0       12         
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.
D - Result of freezeup.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data