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. The water is diverted to Lake Springfield. Occasional regulation occurs due to operation of the gate at the diversion dam. Pumpage from Lake Taylorville into stream generally occurs during the fall upstream from the gage.
 

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 Nov. 19 to Dec. 12, Apr. 6-12, June 16-24 and estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 25  34  681  937  e310  616  2530  344  e1230  87    3.8 e13   
2 25  37  565  1170  e300  583  2220  328  e982  48    4.4 e5.5
3 27  53  476  1310  e295  531  1750  316  735  20    4.7 e4.5
4 25  63  420  e1610  e290  501  1340  331  584  106    4.0 e4.1
5 23  58  390  2590  e280  1580  1030  344  507  132    4.2 3.9
 
6 21  85  372  2770  e270  2640  782  350  474  156    4.3 3.8
7 21  173  353  2860  e265  2750  659  325  497  116    3.5 4.3
8 20  173  335  3300  e260  2980  639  302  446  121    3.3 4.4
9 21  168  327  3660  e250  3100  581  283  315  139    3.9 3.5
10 26  166  325  3710  e240  2970  482  257  267  122    3.7 3.1
 
11 22  166  303  3350  e235  2460  433  251  340  148    3.5 3.1
12 20  165  291  e2430  e230  e1730  385  264  395  233    4.2 2.9
13 28  164  287  e1430  e225  1090  397  310  456  139    4.6 3.0
14 75  162  263  958  e220  774  365  691  541  108    4.3 2.8
15 68  164  253  791  e215  642  329  2320  607  101    3.9 2.2
 
16 70  158  251  695  e215  565  320  3160  812  102    4.2 1.9
17 89  e440  230  645  223  517  315  3570  943  89    4.6 1.8
18 122  1270  224  803  226  492  294  4230  1250  66    4.3 1.8
19 114  2330  200  1040  291  458  272  4940  1250  48    4.1 1.8
20 94  2060  142  1080  623  416  266  5110  1140  21    3.9 2.1
 
21 82  1960  118  1080  1100  373  262  4450  920  7.4 3.8 2.3
22 68  1770  111  1030  1200  336  236  3750  594  6.1 3.8 2.2
23 57  1820  228  911  1190  313  341  2990  371  5.7 3.7 1.8
24 55  2020  946  765  1270  314  350  3080  309  5.0 3.6 1.8
25 49  2030  1170  634  1260  325  426  3290  238  4.7 42    1.8
 
26 40  e1810  1130  551  1110  452  547  2900  193  5.1 e60    1.8
27 34  e1530  1100  e480  942  e1160  486  2360  154  4.9 e80    1.7
28 31  1290  1090  e420  803  1790  420  1960  128  4.9 e94    1.7
29 31  1060  939  e360  686  2400  372  1750  115  4.5 e100    2.1
30 33  840  771  e330  ---  2560  353  1600  101  4.6 e70    2.0
 
31 34  ---  789  e320  ---  2600  ---  e1430  ---  4.6 e30    ---   

TOTAL 1450 24219 15080 44020 15024 40018 19182 57586 16894 2159.5 572.3 92.7
MEAN 46.8 807 486 1420 518 1291 639 1858 563 69.7 18.5 3.09
MAX 122 2330 1170 3710 1270 3100 2530 5110 1250 233 100 13
MIN 20 34 111 320 215 313 236 251 101 4.5 3.3 1.7
CFSM 0.05 0.93 0.56 1.64 0.60 1.49 0.74 2.14 0.65 0.08 0.02 0.00
IN. 0.06 1.04 0.65 1.89 0.64 1.72 0.82 2.47 0.72 0.09 0.02 0.00
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2004, BY WATER YEAR (WY)
MEAN 195 266 526 589 882 1021 1046 1063 887 370 232 140
MAX 2748 2846 4546 3788 4273 3669 3991 6489 3600 3053 3046 2876
(WY) 1970 1986 1968 1950 1982 1978 1994 2002 1974 1957 1958 1993
MIN 1.06 0.67 0.19 0.75 3.04 0.05 2.80 17.9 3.20 1.74 1.02 1.13
(WY) 1989 1977 1977 1990 2000 2000 2000 1954 1988 1954 1964 1987

SUMMARY STATISTICS FOR 2003 CALENDAR YEAR FOR 2004 WATER YEAR WATER YEARS 1949 - 2004
ANNUAL TOTAL 136923.37       236297.5        
ANNUAL MEAN 375            646            600           
HIGHEST ANNUAL MEAN 1461            2002
LOWEST ANNUAL MEAN 26.3         1954
HIGHEST DAILY MEAN 5620                May 11 5110                May 20 19000            Apr 14 1994
LOWEST DAILY MEAN 0.87   A     Apr 3 1.7             Sep 27,28 0.00       B
ANNUAL SEVEN-DAY MINIMUM 2.0             Feb 10 1.8             Sep 23 0.00       Jun 9 1988
MAXIMUM PEAK FLOW 5530        C     May 20 20300        D Apr 14 1994
MAXIMUM PEAK STAGE 23.21   E     May 20 33.65   F May 13 2002
INSTANTANEOUS LOW FLOW 1.6             G
ANNUAL RUNOFF (CFSM) 0.433     0.745     0.692    
ANNUAL RUNOFF (INCHES) 5.87       10.14       9.40      
10 PERCENT EXCEEDS 1080            1980            1620           
50 PERCENT EXCEEDS 114            294            165           
90 PERCENT EXCEEDS 3.0         4.0         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, 23.12 ft.

D - Gage height, 32.40 ft.

E - Discharge, 5240 ft3/s.

F - Discharge, 14100 ft3/s.

G - Sept. 17, 24, 27, 28.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data