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 (510.97 ft NAVD 1988). Prior to April 6, 1966, water-stage recorder at site 2.4 mi downstream at same datum. April 29, 1975 to current, auxiliary water-stage recorder at site 1.2 mi downstream at same datum. Prior to May 19, 1950, auxiliary non-recording gage at site 6.2 mi downstream at same datum. May 19, 1950 to Apr. 29, 1975, auxiliary non-recording gage at site 1.2 mi downstream at same datum.
 

REMARKS.-- Beginning Apr. 14, 1955, diversion for Springfield's public-water supply periodically occurs immediately 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 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 Oct. 18 to Nov. 3 and estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.0 836  3470  e390  642  662  596  152  76    2.3 1.6   2.0
2 2.2 1160  3850  415  586  572  507  140  71    2.1 1.4   2.0
3 2.2 1470  3710  545  555  534  444  129  66    1.8 1.3   2.1
4 2.2 e1700  3660  e1550  537  505  413  120  62    2.2 1.4   2.1
5 2.3 1850  3620  3070  536  491  375  112  60    9.0 1.4   2.2
 
6 2.2 1730  3520  5880  593  444  356  106  55    2.1 0.99 2.4
7 1.9 1650  3660  7160  803  441  342  102  49    2.4 1.1   2.4
8 2.0 e1490  4120  9900  e1300  430  313  99  48    2.6 1.2   2.3
9 2.0 e1340  4120  10100  1730  407  297  101  44    2.1 1.3   2.3
10 2.2 1180  4490  8500  1850  391  264  101  41    1.9 1.2   2.3
 
11 2.3 944  5340  6790  1940  378  254  102  38    2.9 1.5   2.4
12 2.5 765  5530  5670  2060  347  283  157  36    2.8 2.0   2.6
13 2.5 699  5030  7430  2280  336  359  176  44    2.9 1.9   2.0
14 2.4 683  4260  8980  3100  331  451  193  518    2.8 1.4   2.3
15 3.1 664  3390  8520  3210  314  521  188  772    2.9 1.7   2.4
 
16 3.7 633  2400  9020  3090  267  520  178  555    2.9 1.8   2.0
17 3.6 592  1580  8190  3160  219  435  150  361    2.2 1.8   1.6
18 461    563  e1140  6440  3190  190  356  127  276    2.4 1.9   1.7
19 1310    565  e963  4980  2990  186  310  199  215    1.7 2.1   1.5
20 850    603  889  4050  2570  176  279  268  166    2.4 2.1   1.6
 
21 633    633  786  3020  1840  169  261  281  128    42    2.1   1.6
22 576    706  666  1830  e1340  171  252  273  105    79    1.7   1.8
23 535    630  579  e1260  e1120  231  245  264  89    59    1.6   2.1
24 441    742  537  e1090  e1030  290  236  222  77    27    1.7   1.3
25 320    e1960  e470  e1040  939  426  229  176  67    5.9 1.7   1.1
 
26 261    2760  e420  1010  812  694  204  142  62    2.1 1.9   1.2
27 607    2880  e390  926  765  847  218  119  34    2.1 1.9   1.4
28 728    2870  e375  845  688  850  211  104  4.4 1.8 1.9   1.5
29 732    2860  e360  787  ---  864  182  93  3.9 2.1 2.1   1.8
30 830    2960  e350  769  ---  764  163  87  2.8 1.8 5.7   2.0
 
31 822    ---  e365  713  ---  673  ---  82  ---    1.4 8.5   ---   

TOTAL 9147.3 40118 74040 130870 45256 13600 9876 4743 4126.1 278.6 61.89 58.0
MEAN 295 1337 2388 4222 1616 439 329 153 138 8.99 2.00 1.93
MAX 1310 2960 5530 10100 3210 864 596 281 772 79 8.5 2.6
MIN 1.9 563 350 390 536 169 163 82 2.8 1.4 0.99 1.1
CFSM 0.34 1.54 2.75 4.87 1.86 0.51 0.38 0.18 0.16 0.01 0.00 0.00
IN. 0.39 1.72 3.18 5.62 1.94 0.58 0.42 0.20 0.18 0.01 0.00 0.00
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2005, BY WATER YEAR (WY)
MEAN 196 285 559 654 895 1010 1034 1046 873 363 228 138
MAX 2748 2846 4546 4222 4273 3669 3991 6489 3600 3053 3046 2876
(WY) 1970 1986 1968 2005 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 2004 CALENDAR YEAR FOR 2005 WATER YEAR WATER YEARS 1949 - 2005
ANNUAL TOTAL 318853.8   332174.89    
ANNUAL MEAN 871      910          606           
HIGHEST ANNUAL MEAN 1461            2002
LOWEST ANNUAL MEAN 26.3         1954
HIGHEST DAILY MEAN 5530          Dec 12 10100              Jan 9 19000            Apr 14 1994
LOWEST DAILY MEAN 1.7       Sep 27,28 0.99 A     Aug 6 0.00       B
ANNUAL SEVEN-DAY MINIMUM 1.8       Sep 23 1.2           Aug 4 0.00       Jun 9 1988
MAXIMUM PEAK FLOW 10500      C     Jan 8 20300        D Apr 14 1994
MAXIMUM PEAK STAGE 28.27 E     Jan 9 33.65   F May 13 2002
INSTANTANEOUS LOW FLOW 0.97 A     G
ANNUAL RUNOFF (CFSM) 1.00 1.05     0.699    
ANNUAL RUNOFF (INCHES) 13.68 14.25     9.49      
10 PERCENT EXCEEDS 2860      3040          1640           
50 PERCENT EXCEEDS 406      267          167           
90 PERCENT EXCEEDS 3.2   1.9       4.5        

A - Due to regulation.

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

C - Gage height, 28.24 ft.

D - Gage height, 32.40 ft.

E - Discharge, 10,500 ft3/s.

F - Discharge, 14,100 ft3/s.

G - Aug. 6-7, Sept. 24-25.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data