Station list     Available data
ILLINOIS RIVER BASIN


05576500       SANGAMON RIVER AT RIVERTON, IL

 

LOCATION.-- Lat 39°50'35", long 89°32'50" (NAD of 1927), in NW1/4NE1/4 sec.16, T.16 N., R.4 W., Sangamon County, Hydrologic Unit 07130008, at right abutment on former U.S. Highway 36 bridge in Riverton, 2.2 mi downstream from Sugar Creek, 5.6 mi upstream from Fancy Creek, and at mile 83.1.
 

DRAINAGE AREA.-- 2,618 mi2.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: February 1908 to December 1912, August 1914 to October 1956, and January 1986 to current year.
 

STAGE: Water years 1994 to current year.
 

PARTIAL RECORD: Annual maximum, water years 1957-85.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1978-91.
 

MISCELLANEOUS: Water years 1998 and 2002.
 

REVISED RECORDS.-- WSP 1208: 1908-9, 1921-22, 1926-27, 1947. WDR IL-75-1: Drainage area.
 

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 508.38 ft above NGVD of 1929. Prior to Aug. 14, 1934, chain gage on old Wabash Railway bridge (currently Norfolk and Western Railway bridge), 1,450 ft downstream, at datum 5.61 ft lower.
 

REMARKS.-- Some regulation by municipal reservoirs at Decatur (since 1922) and at Springfield (since 1934).
 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 68,700 ft3/s, May 19, 1943, gage height, 31.52 ft, from graph based on gage readings; minimum daily, 3.0 ft3/s, Oct. 3-15, 1914.
 

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: The high water of 1883 reached a stage of approximately 32 ft with respect to the gage at the old Wabash Railway bridge. The high water of 1875 is said to have been about one-half foot lower.
 

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 140  172  117  220  145  e240  858  486  1060  1110  331  1540 
2 113  181  117  213  157  e230  553  439  1100  950  296  2890 
3 106  211  115  213  134  e220  365  471  1180  568  601  3010 
4 107  210  116  203  121  e213  310  446  1200  428  1320  3210 
5 104  182  115  191  120  e208  294  845  978  372  1540  3200 
 
6 139  219  109  182  134  203  584  1920  828  324  1470  2840 
7 110  182  125  175  110  206  824  2330  864  293  1030  2300 
8 95  174  121  170  105  227  846  2760  865  266  839  1820 
9 92  148  110  154  118  234  763  2580  767  278  616  1070 
10 86  139  111  132  111  227  825  4090  730  941  428  557 
 
11 83  143  107  92  101  223  1330  8790  854  1880  382  360 
12 83  141  114  108  e101  224  1110  12300  1750  2120  250  374 
13 84  129  108  161  e102  332  970  10200  2720  2080  179  271 
14 84  115  101  140  e104  631  873  8000  3520  2040  159  215 
15 83  124  97  95  e107  728  708  6490  3880  2280  146  193 
 
16 83  120  96  118  e110  509  465  5580  4180  2420  140  181 
17 80  120  98  102  e115  470  448  4900  3870  2450  133  166 
18 83  148  130  112  e125  778  672  3880  3480  1990  129  150 
19 145  163  194  124  e150  512  727  3110  2930  1970  134  138 
20 185  128  358  e115  e200  875  657  2640  2530  1610  170  130 
 
21 170  135  370  e105  e300  1280  630  2530  2130  1660  137  126 
22 122  139  320  e95  e400  1410  544  2480  1670  2120  126  122 
23 109  127  259  e90  e370  1370  341  2270  1520  2170  121  118 
24 99  133  223  e86  e330  1090  377  2050  1250  1890  115  114 
25 125  131  201  e88  e300  678  438  1910  989  1310  109  109 
 
26 141  128  188  e90  e280  515  538  1660  1010  796  108  112 
27 154  122  172  e91  e260  446  645  1540  1040  512  111  133 
28 157  117  159  e94  e250  412  653  1520  1340  416  104  132 
29 167  117  158  e98  ---  504  673  1520  1090  364  105  137 
30 191  117  160  e103  ---  867  606  1400  993  358  107  121 
 
31 214  ---  193  119  ---  980  ---  1190  ---  366  232  --- 

TOTAL 3734 4415 4962 4079 4960 17042 19627 102327 52318 38332 11668 25839
MEAN 120 147 160 132 177 550 654 3301 1744 1237 376 861
MAX 214 219 370 220 400 1410 1330 12300 4180 2450 1540 3210
MIN 80 115 96 86 101 203 294 439 730 266 104 109
CFSM 0.05 0.06 0.06 0.05 0.07 0.21 0.25 1.26 0.67 0.47 0.14 0.33
IN. 0.05 0.06 0.07 0.06 0.07 0.24 0.28 1.45 0.74 0.54 0.17 0.37
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 2003, BY WATER YEAR (WY)
MEAN 849 929 1130 1814 2335 2775 3258 3313 2394 1105 518 572
MAX 12280 5516 7500 12940 7762 8117 14100 16760 8596 4819 5914 12730
(WY) 1927 1942 1928 1950 1951 1939 1922 1943 1998 1951 1915 1926
MIN 7.29 12.6 27.5 29.5 34.6 50.8 180 113 146 49.1 40.7 22.3
(WY) 1915 1915 1915 1918 1931 1954 1931 1954 1934 1954 1936 1922

SUMMARY STATISTICS FOR 2002 CALENDAR YEAR FOR 2003 WATER YEAR WATER YEARS 1908 - 2003
ANNUAL TOTAL 1208161      289303         
ANNUAL MEAN 3310      793          1742         
HIGHEST ANNUAL MEAN 4808          1927
LOWEST ANNUAL MEAN 114          1954
HIGHEST DAILY MEAN 47900          May 14 12300              May 12 67700          May 19 1943
LOWEST DAILY MEAN 80          Oct 17 80              Oct 17 3.0       A
ANNUAL SEVEN-DAY MINIMUM 83          Oct 11 83              Oct 11 3.0       Oct 3 1914
MAXIMUM PEAK FLOW 12800              May 12 68700          May 19 1943
MAXIMUM PEAK STAGE 20.21         May 12 31.52 B May 19 1943
INSTANTANEOUS LOW FLOW 51      C     Jan 11
ANNUAL RUNOFF (CFSM) 1.26 0.30     0.67    
ANNUAL RUNOFF (INCHES) 17.17 4.11     9.04    
10 PERCENT EXCEEDS 9380      2120          4620         
50 PERCENT EXCEEDS 906      227          650         
90 PERCENT EXCEEDS 115      105          61         

A - Oct. 3-15, 1914.

B - From graph based on gage readings.

C - Result of freeze-up.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data