Station list     Available data
ILLINOIS RIVER BASIN


05576000       SOUTH FORK SANGAMON RIVER NEAR ROCHESTER, IL

 

LOCATION.-- Lat 39°44'32", long 89°34'02" (NAD of 1927), in NE1/4NW1/4 sec.20, T.15 N., R.4 W., Sangamon County, Hydrologic Unit 07130007, on right bank at city of Springfield dam, 100 ft downstream from Horse Creek, 1.7 mi southwest of Rochester, and at mile 7.4. Auxiliary gage 1.2 miles downstream.

 

DRAINAGE AREA.-- 867 mi2.

 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

 

DISCHARGE: July 1949 to current year.

 

STAGE: Water years 1994 to current year.

 

REVISED RECORDS.-- 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 511.30 ft above NGVD of 1929. Prior to Oct. 1, 1964, water-stage recorder, and Oct. 1, 1964, to Apr. 12, 1966, non-recording gage, at site 1.8 mi downstream at same datum. Auxiliary water-stage recorder at site 1.2 mi downstream. Prior to May 19, 1950, auxiliary non-recording gage at site 6.2 mi downstream. May 19, 1950 to Apr. 29, 1975, auxiliary non-recording gage at site 1.2 mi downstream.

 

REMARKS.-- Beginning Apr. 14, 1955, diversion for Springfield's public-water supply periodically occurs upstream from the station and upstream from the dam between the confluence of Horse Creek and the gage. Occasional regulation caused by operation of gate at diversion dam.

 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 20,300 ft3/s, Apr. 14, 1994, gage height, 32.40 ft; maximum gage height, 33.65 ft, May 13, 2002, discharge 14,100 ft3/s; no flow Nov. 4-6, 1985, Sept. 9, 1987, and for many days in 1988-90, 92, and 2000.

 

REMARKS FOR CURRENT YEAR.-- Records fair except those for Mar. 28-Apr. 29, July 20-26, and Aug. 3-8 and those for estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
143   35   12   36   4.23.561     145 424 236 44   724 
217   89   12   50   3.3e3.21.8  173 383 193 46   1490 
314   98   11   60   3.2e3.00.87227 321 158 262   1710 
49.767   11   55   3.9e2.82.5  187 298 142 636   2090 
54.578   11   48   3.3e2.640     324 286 130 992   2200 
 
63.645   11   43   1.9e2.4312     617 273 117 797   2050 
73.046   10   41   e2.2e2.3358     980 277 107 390   1700 
83.028   10   26   e3.0e2.2377     854 273 93 183   1060 
92.511   10   1.6e2.22.1351     781 261 85 117   440 
102.634   10   2.0e1.92.2192     2670 247 112 68   117 
 
112.635   10   3.0e1.92.3268     5620 301 272 23   129 
123.022   10   15   e1.92.6176     4520 541 458 8.9214 
133.22.710   14   e2.03.3150     3860 794 383 7.892 
142.72.910   2.5e2.040   140     3500 1260 245 6.572 
151.92.910   1.7e2.1109   124     3210 1410 263 6.561 
 
162.16.511   2.3e2.196   97     2960 1580 285 6.651 
171.934   11   3.32.276   106     2470 1520 292 6.840 
182.064   5.74.42.364   127     e1790 1330 176 12   32 
192.425   1.218   2.746   128     1180 1000 192 58   28 
202.517   105   13   3.554   104     1030 692 439 56   26 
 
212.241   205   e20   82   102   95     1070 551 695 19   23 
221.514   153   e28   200   166   52     1010 448 882 18   21 
231.814   105   e12   137   187   61     981 400 884 16   18 
242.413   e82   e5.0106   140   114     933 346 723 14   16 
252.513   e64   e2.559   143   91     819 295 376 13   14 
 
261.813   e52   e1.537   90   58     663 275 196 13   15 
273.813   e44   e2.017   64   81     549 300 126 12   17 
2854   12   e40   e3.04.683   170     473 374 56 12   26 
2924   12   36   e4.5---   141   244     420 318 55 12   31 
3049   12   33   e7.0---   140   159     373 279 73 12   28 
 
3122   ---   32   4.9---   156   ---     367 --- 94 23   --- 

TOTAL292.2900.01137.9530.2694.41931.54241.17447561705785383891.114535
MEAN9.4330.036.717.124.862.31411444569275126484
MAX549820560200187377562015808849922200
MIN1.52.71.21.51.92.10.87145247556.514
CFSM0.010.030.040.020.030.070.161.670.660.320.140.56
IN.0.010.040.050.020.030.080.181.920.730.370.170.62

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2003, BY WATER YEAR (WY)
MEAN197256526573889101610541048893375236143
MAX274828464546378842733669399164893600305330462876
(WY)197019861968195019821978199420021974195719581993
MIN1.060.670.190.753.040.0532.8017.93.201.741.021.13
(WY)198919771977199020002000200019541988195419641987

SUMMARY STATISTICSFOR 2002 CALENDAR YEARFOR 2003 WATER YEARWATER YEARS 1949 - 2003
ANNUAL TOTAL483647.6  98504.47    
ANNUAL MEAN1325     270         599         
HIGHEST ANNUAL MEAN1461         2002
LOWEST ANNUAL MEAN26.3      1954
HIGHEST DAILY MEAN14900         May 135620             May 1119000         Apr 14 1994
LOWEST DAILY MEAN1.2      Dec 190.87 A    Apr 30.00    B
ANNUAL SEVEN-DAY MINIMUM2.0      Jul 302.0          Feb 100.00    Jun 9 1988
MAXIMUM PEAK FLOW6190      C    May 1120300      DApr 14 1994
MAXIMUM PEAK STAGE24.15 E    May 1133.65 FMay 13 2002
INSTANTANEOUS LOW FLOW0.74 A    Apr 3
ANNUAL RUNOFF (CFSM)1.530.31    0.69    
ANNUAL RUNOFF (INCHES)20.754.23    9.39    
10 PERCENT EXCEEDS3850     786         1610         
50 PERCENT EXCEEDS256     48         163         
90 PERCENT EXCEEDS3.0  2.4      4.8      

A - Due to regulation.

B - Nov. 4-6, 1985; Sept. 9, 1987; many days in 1988-90, 1992 and 2000.

C - Gage height, 24.07 ft.

D - Gage height, 32.40 ft.

E - Discharge, 5,970 ft3/s.

F - Discharge, 14,100 ft3/s.



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data