05536000 DATA: Discharge Tables, 2000

Station list Available data
ILLINOIS RIVER BASIN

05536000 NORTH BRANCH CHICAGO RIVER AT NILES, IL

LOCATION.-- Lat 42°00'44", long 87°47'45", in SW1/4SE1/4 sec.30, T.41 N., R.13 E., Cook County, Hydrologic Unit 07120003, on right bank at downstream side of bridge on Touhy Avenue in Niles, 3.6 mi downstream from West Fork of North Branch, 7.9 mi upstream from North Shore Channel, and at mile 51.4.

DRAINAGE AREA.-- 100 mi².

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

DISCHARGE: October 1950 to current year. Prior to October 1952, records published with those for streams in the St. Lawrence River basin (WSP 1207, 1237).

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978 to 1991. Additional chemical data for water years 1972-77 are published in Water-Resources Investigations 78-22 and 79-23 as site HCC 07.

SEDIMENT: October 1984 to September 1986.

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

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 601.99 ft above sea level.

REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plants.

EXTREMES FOR PERIOD OF RECORD.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 285 mg/L July 15, 1985; minimum daily mean, 2 mg/L Jan. 23 to Feb. 21, 1985, and Jan. 30-31, 1986.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 566 tons July 8, 1986; minimum daily, 0.14 ton Jan. 29, Jan. 31 to Feb. 4, Feb. 6-11, 15-19, 1985.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	139	26	18	e20	e18	101	39	154	237	53	190	20
2	95	26	17	23	e18	80	37	147	272	61	115	17
3	158	26	34	30	e17	71	37	121	170	430	71	15
4	309	22	47	52	e17	63	38	92	130	384	50	14
5	169	23	482	41	e18	49	36	82	277	258	44	15

6	105	24	372	35	e19	45	36	72	260	182	59	15
7	77	24	156	34	e21	43	69	64	170	145	49	16
8	61	17	91	31	e23	43	191	79	119	116	35	17
9	52	20	70	41	29	40	164	236	105	91	29	19
10	45	20	57	70	36	41	119	221	85	265	26	18

11	39	21	48	66	42	40	95	184	144	462	24	205
12	35	20	39	52	38	36	82	312	192	341	20	729
13	34	26	34	40	35	34	69	246	169	209	17	414
14	32	11	34	45	35	34	60	117	304	208	17	269
15	30	10	47	34	35	43	56	90	241	193	18	180

16	33	12	46	32	36	45	95	89	160	109	18	96
17	32	18	40	28	36	36	241	78	131	86	162	65
18	31	26	e35	e25	37	36	106	154	98	69	109	47
19	33	21	e32	e23	47	42	232	440	76	54	66	41
20	32	22	e30	e22	50	121	932	444	82	44	44	55

21	31	19	e29	e21	62	120	1220	347	108	41	34	e70
22	30	18	e28	e20	199	95	886	264	79	37	29	e60
23	28	78	e27	e20	384	79	674	232	64	30	24	e370
24	28	53	e25	e19	507	81	630	190	145	25	22	e420
25	24	30	e24	e19	510	79	536	167	214	25	21	e260

26	27	23	e22	e18	330	60	422	195	135	23	26	e200
27	18	21	e21	e18	225	59	312	199	110	23	48	e140
28	30	20	e22	e18	169	52	242	282	93	31	26	107
29	25	19	e23	e21	125	42	195	226	79	54	23	74
30	25	18	e22	e20	---	40	153	164	63	30	21	57

31	32	---	e20	e19	---	41	---	180	---	135	20	---

TOTAL	1839	714	1992	957	3118	1791	8004	5868	4512	4214	1457	4025
MEAN	59.3	23.8	64.3	30.9	108	57.8	267	189	150	136	47.0	134
MAX	309	78	482	70	510	121	1220	444	304	462	190	729
MIN	18	10	17	18	17	34	36	64	63	23	17	14
CFSM	.59	.24	.64	.31	1.08	.58	2.67	1.89	1.50	1.36	.47	1.34
IN.	.68	.27	.74	.36	1.16	.67	2.98	2.18	1.68	1.57	.54	1.50

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2000, BY WATER YEAR (WY)
MEAN	61.5	79.9	83.3	78.6	105	170	193	126	105	80.9	74.7	67.8
MAX	293	349	381	239	358	582	496	445	339	290	401	315
(WY)	1987	1986	1983	1974	1997	1979	1999	1996	1996	1982	1987	1972
MIN	2.83	5.53	6.56	5.51	4.87	28.6	50.0	24.9	19.0	9.46	6.15	4.54
(WY)	1953	1954	1951	1963	1963	1968	1986	1952	1963	1956	1955	1953

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1951 - 2000
ANNUAL TOTAL	52492		38491
ANNUAL MEAN	144		105		102
HIGHEST ANNUAL MEAN					171	1993
LOWEST ANNUAL MEAN					28.0	1963
HIGHEST DAILY MEAN	1620	Apr 23	1220	Apr 21	2030	Aug 15 1987
LOWEST DAILY MEAN	10	Nov 15	10	Nov 15	.10	Sep 30 1953
ANNUAL SEVEN-DAY MINIMUM	17	Nov 11	16	Sep 2	1.3	Oct 9 1952
INSTANTANEOUS PEAK FLOW			1290	Apr 21	2590	Aug 14 1987
INSTANTANEOUS PEAK STAGE			8.10	Apr 21	11.35	Aug 14 1987
INSTANTANEOUS LOW FLOW			6.1	Nov 14, 15
ANNUAL RUNOFF (CFSM)	1.44		1.05		1.02
ANNUAL RUNOFF (INCHES)	19.53		14.32		13.87
10 PERCENT EXCEEDS	399		259		244
50 PERCENT EXCEEDS	53		47		48
90 PERCENT EXCEEDS	20		19		13