LOCATION.-- Lat 41°19'37", long 88°43'03" (NAD of 1927), 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 to current year. |
|
SURFACE-WATER QUALITY |
|
CHEMICAL: Water years 1975-96. |
|
SPECIFIC CONDUCTANCE: Water years 1975-81. |
|
WATER TEMPERATURE: Water years 1975-81. |
|
MISCELLANEOUS: Water Year 1998; Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996; sediment concentration and particle size, water years 1993-97, 2003. |
|
REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
|
GAGE.-- Water-stage recorder, phone telemeter, sediment sampler, and U.S. Army Corps of Engineers satellite telemeter. Datum of gage is 452.91 ft above NGVD of 1929. October 1919 to January 1935, nonrecording gage at site at Morris, 16.6 mi upstream, at datum 25.59 ft higher. January 1935 to September 1939, water-stage recorder 300 ft downstream from Morris site at that datum. October 1939 to September 2002, water-stage recorder at current site at datum 10 ft. higher. |
|
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, 26.85 ft at current datum; minimum daily discharge, 461 ft3/s, Nov. 21, 2002. |
|
EXTREMES OUTSIDE PERIOD OF RECORD.-- |
|
SURFACE-WATER DISCHARGE AND STAGE: A stage of 26.2 ft at Morris occurred in 1831, discharge not determined, and a stage of 35.4 ft (ice jam) occurred at present site and datum on Jan. 21, 1916, estimated discharge, 40,000 ft3/s. |
|
REMARKS FOR CURRENT YEAR.-- Records good. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 2320 | 2300 | 2190 | 2760 | 3470 | 3600 | 4200 | 14300 | 10200 | 3960 | 12300 | 7250 |
2 | 4920 | 2610 | 2940 | 3290 | 3070 | 1860 | 4420 | 14300 | 9190 | 3910 | 12600 | 6050 |
3 | 3540 | 2110 | 3230 | 4400 | 2130 | 3300 | 4460 | 14700 | 9300 | 5180 | 14000 | 7120 |
4 | 5460 | 2590 | 2690 | 4250 | 3730 | 2760 | 8300 | 14200 | 7420 | 4060 | 14100 | 7610 |
5 | 5230 | 2930 | 2140 | 3810 | 3310 | 3260 | 11800 | 18100 | 8540 | 5720 | 13200 | 7360 |
6 | 5370 | 2160 | 2840 | 3590 | 3580 | 3150 | 12500 | 19000 | 7950 | 8020 | 11500 | 6620 |
7 | 4820 | 2800 | 2740 | 3430 | 2790 | 2760 | 11400 | 18100 | 6230 | 12000 | 11200 | 5120 |
8 | 3030 | 1930 | 3100 | 3230 | 3930 | 4830 | 12000 | 15400 | 8050 | 15900 | 10600 | 5670 |
9 | 3980 | 3130 | 2980 | 4020 | 2650 | 3230 | 11600 | 23700 | 6480 | 19200 | 9480 | 4310 |
10 | 2970 | 2270 | 1970 | 2560 | 3820 | 4390 | 11000 | 31300 | 7000 | 25200 | 8410 | 3840 |
11 | 3430 | 2830 | 3530 | 3410 | 2130 | 3590 | 10500 | 32400 | 6350 | 29400 | 7800 | 4220 |
12 | 3290 | 2230 | 2280 | 2660 | 3470 | 4450 | 8570 | 31800 | 6780 | 29200 | 8280 | 4630 |
13 | 3460 | 3820 | 3000 | 2920 | 2310 | 4860 | 8000 | 26600 | 5790 | 28000 | 6650 | 3580 |
14 | 2400 | 2220 | 2710 | 2770 | 3500 | 6610 | 8240 | 24100 | 7160 | 26000 | 7040 | 5820 |
15 | 2460 | 3690 | 2310 | 3070 | 1980 | 5540 | 6160 | 20900 | 10300 | 29300 | 5910 | 4390 |
16 | 3040 | 2700 | 3380 | 2730 | 3260 | 5200 | 6340 | 20200 | 10400 | 32600 | 5640 | 4860 |
17 | 2730 | 3120 | 2170 | 2490 | 2320 | 5410 | 5280 | 18800 | 10000 | 29300 | 6450 | 3760 |
18 | 3240 | 3180 | 6600 | 2420 | 1910 | 5090 | 5550 | 15300 | 10400 | 34000 | 5800 | 4370 |
19 | 2520 | 2030 | 7120 | 2200 | 3440 | 5480 | 6350 | 13900 | 8880 | 36800 | 4230 | 4270 |
20 | 3080 | 2480 | 6180 | 2640 | 2760 | 6040 | 4260 | 13800 | 6970 | 32900 | 5440 | 2730 |
21 | 1510 | 461 | 4990 | 2800 | 1740 | 6360 | 4760 | 11700 | 7240 | 29100 | 4440 | 4820 |
22 | 2980 | 2840 | 4190 | 1980 | 3640 | 6950 | 5360 | 10200 | 5720 | 32100 | 4910 | 3420 |
23 | 2700 | 2830 | 4970 | 2080 | 1880 | 5310 | 4430 | 9270 | 6090 | 29200 | 4700 | 4440 |
24 | 1820 | 3230 | 3800 | 3230 | 3570 | 5350 | 5420 | 8960 | 5240 | 24900 | 4860 | 3750 |
25 | 2920 | 3120 | 4220 | 2730 | 2250 | 5720 | 4970 | 8010 | 4760 | 20700 | 4140 | 2480 |
26 | 2410 | 2910 | 3140 | 2250 | 3040 | 5410 | 4570 | 7330 | 4090 | 16600 | 3330 | 5030 |
27 | 2940 | 2840 | 3010 | 2670 | 2870 | 4970 | 4300 | 6370 | 4310 | 16800 | 5260 | 4700 |
28 | 2250 | 2750 | 4070 | 2220 | 2820 | 6120 | 3890 | 7930 | 4810 | 22800 | 3430 | 5950 |
29 | 2860 | 2890 | 3600 | 2650 | --- | 5150 | 4250 | 7830 | 4000 | 18600 | 4300 | 3850 |
30 | 2040 | 2360 | 3080 | 2810 | --- | 5410 | 8070 | 9240 | 5150 | 14800 | 4390 | 4090 |
31 | 2100 | --- | 4900 | 1810 | --- | 5020 | --- | 9550 | --- | 13300 | 4710 | --- |
TOTAL | 97820 | 79361 | 110070 | 89880 | 81370 | 147180 | 210950 | 497290 | 214800 | 649550 | 229100 | 146110 |
MEAN | 3155 | 2645 | 3551 | 2899 | 2906 | 4748 | 7032 | 16040 | 7160 | 20950 | 7390 | 4870 |
MAX | 5460 | 3820 | 7120 | 4400 | 3930 | 6950 | 12500 | 32400 | 10400 | 36800 | 14100 | 7610 |
MIN | 1510 | 461 | 1970 | 1810 | 1740 | 1860 | 3890 | 6370 | 4000 | 3910 | 3330 | 2480 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1920 - 2003, BY WATER YEAR (WY) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MEAN | 7543 | 8424 | 9596 | 9899 | 11740 | 14970 | 16120 | 13850 | 11770 | 9345 | 7786 | 7630 |
MAX | 21050 | 24180 | 30100 | 28430 | 25970 | 41290 | 33180 | 35180 | 25940 | 21020 | 19220 | 22770 |
(WY) | 1927 | 1986 | 1983 | 1993 | 1997 | 1979 | 1922 | 1943 | 1993 | 1957 | 1924 | 1993 |
MIN | 3155 | 2278 | 3551 | 2899 | 2906 | 4748 | 6516 | 5649 | 4346 | 4687 | 4242 | 3345 |
(WY) | 2003 | 2000 | 2003 | 2003 | 2003 | 2003 | 1986 | 1988 | 1988 | 1988 | 1939 | 1999 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1920 - 2003 | |||
---|---|---|---|---|---|---|
ANNUAL TOTAL | 3376481 | 2553481 | ||||
ANNUAL MEAN | 9251 | 6996 | 10710 | |||
HIGHEST ANNUAL MEAN | 17850 | 1993 | ||||
LOWEST ANNUAL MEAN | 5583 | 1964 | ||||
HIGHEST DAILY MEAN | 76700 | May 13 | 36800 | Jul 19 | 89600 | Feb 22 1997 |
LOWEST DAILY MEAN | 461 A | Nov 21 | 461 A | Nov 21 | 461 A | Nov 21 2002 |
ANNUAL SEVEN-DAY MINIMUM | 2320 | Oct 28 | 2320 | Oct 28 | 1990 B | Jan 9 1999 |
MAXIMUM PEAK FLOW | 38000 | Jul 19 | 95000 | Feb 22 1997 | ||
MAXIMUM PEAK STAGE | 17.97 | Jul 19 | 26.85 C | Feb 22 1997 | ||
10 PERCENT EXCEEDS | 18900 | 15000 | 19300 | |||
50 PERCENT EXCEEDS | 5500 | 4430 | 8890 | |||
90 PERCENT EXCEEDS | 2700 | 2320 | 4450 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |