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.

 

DRAINAGE AREA.-- 867 mi2.

 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

 

DISCHARGE: July 1949 to current year.

 

STAGE: Water years 1994-2002.

 

REVISED RECORDS.-- 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 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 estimated daily discharges, which are poor.

DISCHARGE -SLOPE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
17.0464 814 e430 3050 913 2950 5610 2550 485   2.018   
26.2412 891 e400 3460 949 2880 6080 2400 414   1.716   
35.8336 783 e440 3330 1740 2550 5750 e1800 356   1.914   
45.7311 700 e470 3490 1900 e2020 5180 1190 314   1.712   
59.2289 623 434 3430 1840 1450 4630 924 276   2.411   
 
611   272 565 390 3290 1750 1060 4140 911 245   98   9.9
79.7260 522 369 2870 1710 851 4720 822 216   15   9.4
89.4251 455 349 e2300 1590 888 5650 785 189   3.59.1
913   238 392 361 e1750 1620 1240 8690 745 168   2.88.6
1013   230 349 345 1280 1870 1350 11200 716 151   2.88.5
 
1112   221 316 334 1030 1830 1340 11000 e1250 138   2.47.6
1255   183 303 325 900 1860 1300 13200 4170 135   3.17.8
13245   132 366 315 818 1890 1240 14900 6860 145   2.97.9
14618   100 539 311 787 1890 1100 14300 10000 148   2.97.7
15657   84 1000 301 766 1780 1000 14100 12100 152   2.88.9
 
16697   76 1350 290 692 e1500 923 12400 11300 89   2.99.3
17758   71 e2080 280 606 e1370 825 10800 8980 165   3.38.8
18755   69 e2650 267 571 e1110 737 8620 6840 91   121   9.1
19634   69 2720 262 646 1010 665 6660 5390 75   78   22   
20487   66 2900 261 1040 956 1210 5410 4270 64   71   54   
 
21369   61 2900 263 e1570 939 e2500 4460 2850 57   29   374   
22263   62 2630 259 e1820 922 3710 3830 e1500 52   27   226   
23220   63 2260 264 e1940 921 3590 2990 1010 30   91   66   
24196   85 1820 261 e2040 881 3470 e2330 823 4.468   42   
25e800   124 1350 256 e2080 886 3970 e1900 706 3.345   15   
 
26e1000   121 1020 253 e1960 1210 3880 e1600 675 3.8111   5.2
27e900   135 859 247 e1660 1510 4140 1410 885 158   121   4.7
28e700   132 763 240 1190 1960 5750 2000 889 89   142   5.1
29e560   129 682 236 --- 2490 5510 2460 740 12   107   4.8
30e480   355 595 259 --- 2700 5160 2660 589 2.341   49   
 
31438   --- e470 1310 --- 2880 --- 2480 --- 2.218   ---   

TOTAL10934.054013566710782503664837769259201160946704430.01222.11051.4
MEAN352.7180.01151347.817991561230964893156142.939.4235.05
MAX1000464290013103490288057501490012100485142374
MIN5.76130323657188166514105892.21.74.7
CFSM0.410.211.330.402.071.802.667.483.640.160.050.04
IN.0.470.231.530.462.162.082.978.634.060.190.050.05

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1949 - 2002, BY WATER YEAR (WY)
MEAN200.9260.1535.6583.8904.7103410711040898.8376.9238.4136.3
MAX274828464546378842733669399164893600305330462876
(WY)197019861968195019821978199420021974195719581993
MIN1.060.670.190.753.040.0532.8017.93.201.741.021.13
(WY)198919771977199020002000200019541988195419641987

SUMMARY STATISTICSFOR 2001 CALENDAR YEARFOR 2002 WATER YEARWATER YEARS 1949 - 2002
ANNUAL TOTAL254574.5  533319.5      
ANNUAL MEAN697.5  1461         605.5      
HIGHEST ANNUAL MEAN1461         2002
LOWEST ANNUAL MEAN26.3      1954
HIGHEST DAILY MEAN7290         Jun 1014900             May 1319000         Apr 14 1994
LOWEST DAILY MEAN1.0      Aug 51.7          Aug 2,40.00    A
ANNUAL SEVEN-DAY MINIMUM1.4      Jul 232.0          Jul 300.00    Jun 9 1988
MAXIMUM PEAK FLOW16500      B    May 1320300      CApr 14 1994
MAXIMUM PEAK STAGE33.65 D    May 1333.65 DMay 13 2002
INSTANTANEOUS LOW FLOW1.5          Aug 2,4,5
ANNUAL RUNOFF (CFSM)0.801.69    0.70    
ANNUAL RUNOFF (INCHES)10.9222.88    9.49    
10 PERCENT EXCEEDS1990     3850         1630         
50 PERCENT EXCEEDS270     565         167         
90 PERCENT EXCEEDS2.4  9.0      5.0      

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

B - Gage height, 32.55 ft.

C - Gage height, 32.40 ft.

D - Discharge, 14100 ft3/s.



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data