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 1994-2002.
 

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 rain gage, 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 good except those for April 28 to June 27 and those for estimated daily discharges, which are poor.
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 93  2210  1880  e1300  7190  3550  5610  13200  3940  1600  220  390 
2 96  1780  1910  e1350  8540  3280  5610  12200  3830  1370  203  345 
3 91  988  1890  e1500  9450  4830  4870  11900  3450  1100  191  318 
4 85  761  1870  e1500  9410  5570  4370  11200  2820  1040  182  271 
5 104  666  1730  1350  8960  5120  3680  9950  2380  985  174  223 
 
6 112  604  1630  1230  8520  4890  2950  9360  2500  947  198  190 
7 130  567  1570  1170  7880  4930  2460  10800  2500  906  235  171 
8 106  526  1290  1180  6850  5200  2830  14600  2390  806  159  159 
9 99  508  990  1250  5010  4830  3690  17600  2300  710  149  151 
10 106  483  883  1150  4130  5190  3740  19600  2230  612  145  151 
 
11 111  468  857  1030  3450  5560  3650  21400  2520  579  147  147 
12 207  441  962  1030  2760  5630  3610  27400  6070  628  142  126 
13 740  400  1200  1070  2240  5360  3590  45300  10700  554  144  117 
14 1120  342  1510  1070  2810  5500  3260  47900  17900  516  195  112 
15 1150  317  2180  1040  2950  5140  3000  38700  17500  486  173  119 
 
16 1150  317  2720  965  2480  4540  2780  31700  16000  454  379  120 
17 1380  517  3620  923  1890  4190  2410  25800  13700  422  635  113 
18 1240  371  5290  841  2170  3560  2330  21200  11000  426  376  116 
19 1040  308  6130  813  2780  2910  2390  16800  8990  383  554  146 
20 1240  290  6220  808  3870  2790  3450  12500  7540  358  440  233 
 
21 1520  274  6160  806  4890  2950  6150  10300  5880  337  339  431 
22 1050  373  5530  788  5640  2940  9360  8940  3740  319  256  398 
23 623  418  5000  780  6030  2740  11400  7560  2830  307  523  238 
24 682  545  4120  805  6210  2210  10500  6380  2460  296  934  153 
25 2550  626  3290  795  6280  2240  10500  5190  2060  270  707  136 
 
26 3030  591  3000  822  6140  2940  11100  4220  1900  271  1460  108 
27 2570  545  2750  799  5620  3540  11700  3740  2270  1150  1620  98 
28 2220  537  2480  787  4440  3780  15500  4520  2230  986  1730  95 
29 1670  565  2190  783  ---  4090  17800  4790  2070  398  1520  92 
30 1130  1070  1910  863  ---  4610  15700  4560  1810  286  1030  99 
 
31 1510  ---  e1500  3750  ---  5270  ---  4330  ---  245  619  --- 

TOTAL 28955 18408 84262 34348 148590 129880 189990 483640 167510 19747 15779 5566
MEAN 934.0 613.6 2718 1108 5307 4190 6333 15600 5584 637.0 509.0 185.5
MAX 3030 2210 6220 3750 9450 5630 17800 47900 17900 1600 1730 431
MIN 85 274 857 780 1890 2210 2330 3740 1810 245 142 92
CFSM 0.36 0.23 1.04 0.42 2.03 1.60 2.42 5.96 2.13 0.24 0.19 0.07
IN. 0.41 0.26 1.20 0.49 2.11 1.85 2.70 6.87 2.38 0.28 0.22 0.08
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 2002, BY WATER YEAR (WY)
MEAN 860.7 941.6 1146 1841 2369 2810 3299 3313 2404 1103 520.0 567.2
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 2001 CALENDAR YEAR FOR 2002 WATER YEAR WATER YEARS 1908 - 2002
ANNUAL TOTAL 700689      1326675     
ANNUAL MEAN 1920      3635      1757         
HIGHEST ANNUAL MEAN 4808          1927
LOWEST ANNUAL MEAN 114          1954
HIGHEST DAILY MEAN 20800          Jun 8 47900          May 14 67700          May 19 1943
LOWEST DAILY MEAN 85          Oct 4 85          Oct 4 3.0       A
ANNUAL SEVEN-DAY MINIMUM 92          Sep 28 102          Oct 1 3.0       Oct 3 1914
MAXIMUM PEAK FLOW 51800          May 14 68700          May 19 1943
MAXIMUM PEAK STAGE 30.07     May 14 31.52 B May 19 1943
INSTANTANEOUS LOW FLOW 81          Oct 4,5
ANNUAL RUNOFF (CFSM) 0.73 1.39 0.67    
ANNUAL RUNOFF (INCHES) 9.96 18.85 9.12    
10 PERCENT EXCEEDS 5250      9380      4660         
50 PERCENT EXCEEDS 891      1600      660         
90 PERCENT EXCEEDS 106      166      60         

A - Oct. 3-15, 1914.

B - From graph based on gage readings.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data