Station list     Available data
ILLINOIS RIVER BASIN


05543500       ILLINOIS RIVER AT MARSEILLES, IL



LOCATION.-- Lat 41°19'37", long 88°43'03", in SE1/4SW1/4 sec.13, T.33 N., R.4 E., La Salle County, Hydrologic Unit 07120005, on right bank 0.5 mi downstream from Marseilles Dam in Marseilles, 6.9 mi upstream from Fox River, and at mile 246.5.

DRAINAGE AREA.-- 8,259 mi2, does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: October 1919 to current year. Prior to October 1939, published as "at Morris."

 

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1975-96.

 

SPECIFIC CONDUCTANCE: Water years 1975-81.

 

WATER TEMPERATURE: Water years 1975-81.

 

MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996.


REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and U.S. Army Corps of Engineers satellite telemeter and rain gage. Datum of gage is 462.91 ft above sea level. October 1919 to January 1935, nonrecording gage at site at Morris, 16.6 mi upstream, at datum 478.50 ft above sea level. January 1935 to September 1939, water-stage recorder at site 300 ft downstream from site used 1919-35 and at that datum.

REMARKS.-- Figures of daily discharge include flow through navigation locks. Flow regulated by powerplants and navigation dam above station. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 95,000 ft3/s, Feb. 22, 1997, gage height, 16.85 ft; minimum daily, 1,460 ft3/s, Oct. 16, 1943 and Nov. 10, 1999.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: A stage of 26.2 ft at Morris occurred in 1831, and a stage of 25.4 ft (ice jam) occurred at present site on Jan. 21, 1916.

REMARKS FOR CURRENT YEAR.-- Records good except those for Aug. 21 to Sept. 30, which are fair, and those for estimated daily discharges, which are poor.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
16280 2580 2050 3960 e2400 7090 4810 8600 22100 11500 7580 4890 
24930 2110 2810 2480 e2350 7370 4240 9050 20500 10800 7780 3620 
34230 2040 2580 4050 e2400 6830 3540 8440 15400 15600 6900 3710 
45830 1920 2930 4080 e2600 6430 3160 8090 12400 16200 7120 3670 
55110 1810 10200 3780 e2300 6280 5270 7400 12500 17400 6320 4260 
 
64740 1710 8180 4500 e2450 5850 3320 7100 12500 17300 6160 3410 
74110 2640 6740 2320 e2500 4780 4490 6990 10800 16500 9450 3340 
83400 1730 5920 3550 1910 4820 6040 6520 9800 15800 8270 3380 
93790 2680 5570 3640 3350 4980 5450 10800 9520 13000 7660 3360 
103700 1460 4190 3460 3100 4590 5740 11600 8460 28900 6120 3210 
 
112870 3100 3960 5070 3350 4190 5170 11700 8860 43800 5890 5400 
122900 1690 4090 3860 4600 3760 5800 11700 10800 33600 5590 15600 
133570 1980 3520 3530 2840 4460 5120 12000 13800 24500 5020 10100 
142900 1920 3140 3540 3580 3850 4660 11800 18500 18300 4270 10200 
152940 1930 4850 3580 3730 4010 3970 10800 21600 14400 4380 8840 
 
161710 2450 3650 3800 3060 5710 4730 9260 18900 12000 4080 7530 
173340 2300 4620 3350 3930 3440 9730 8730 14400 9840 5740 6350 
182160 2140 3700 2630 3950 4940 9430 8110 13300 8730 6800 5150 
192730 2000 3920 3470 3740 5220 8900 9250 11100 7970 5130 5120 
201650 2130 2960 2710 3960 5860 16900 10400 11600 7550 4760 4060 
 
212900 1780 3830 2820 3660 5770 30100 10300 19700 6680 4690 5710 
221920 2840 3240 2540 6130 5720 30500 10800 26200 6450 4370 5420 
231540 3710 2650 2160 7180 6160 25200 9450 20900 6120 3920 7000 
241580 2650 3670 2800 9260 6280 20700 8490 18800 5120 4460 8340 
253150 2580 2300 2230 10600 5020 17600 8450 30800 5240 3520 7770 
 
261700 3490 3420 e2500 10500 5440 15300 8010 30000 5400 3280 6350 
272840 1930 2550 e2700 9130 6140 13000 7920 23200 4500 3550 5380 
281720 2050 2040 e2400 8870 5160 11100 12000 18000 5190 3790 4810 
293200 2870 4010 e2300 7640 4720 10400 12200 15500 5230 3650 5370 
301890 2110 3160 e2450 --- 5110 9040 11800 13700 6860 3970 3680 
 
312910 --- 3700 e2500 --- 4460 --- 12900 --- 7650 3130 --- 

TOTAL982406833012415098760135070164440303410300660493640408130167350175030
MEAN316922784005318646585305101109699164501317053985834
MAX6280371010200507010600737030500129003080043800945015600
MIN154014602040216019103440316065208460450031303210

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1920 - 2000, BY WATER YEAR (WY)
MEAN751485269745101001164015120163001377011840929878217727
MAX210502418030100284302597041290331803518025940210201922022770
(WY)192719861983199319971979192219431993195719241993
MIN316922783739318632645153651656494346468742423345
(WY)200020001944200019631964198619881988198819391999

SUMMARY STATISTICSFOR 1999 CALENDAR YEARFOR 2000 WATER YEARWATER YEARS 1920 - 2000
ANNUAL TOTAL3288540 2537210     
ANNUAL MEAN9010 6932     10770         
HIGHEST ANNUAL MEAN17850         1993
LOWEST ANNUAL MEAN5583         1964
HIGHEST DAILY MEAN46000     Jan 2543800         Jul 1189600         Feb 22 1997
LOWEST DAILY MEAN1460     Nov 101460         Nov 101460         A
ANNUAL SEVEN-DAY MINIMUM1990     Jan 91990         Nov 41990      BJan 9 1999
INSTANTANEOUS PEAK FLOW46700         Jul 1195000         Feb 22 1997
INSTANTANEOUS PEAK STAGE9.42    Jul 1116.85    Feb 22 1997
INSTANTANEOUS LOW FLOW519         Aug 31
10 PERCENT EXCEEDS20000 14000     19400         
50 PERCENT EXCEEDS5850 4910     9000         
90 PERCENT EXCEEDS2050 2310     4510         
A - Oct. 16, 1943 and Nov. 10, 1999.
B - Period estimated due to backwater from ice.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data