05536000 DATA: Discharge Tables, 2001

ILLINOIS RIVER BASIN

05536000 NORTH BRANCH CHICAGO RIVER AT NILES, IL

LOCATION.-- Lat 42°00'44", long 87°47'44", 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 1994-2001.

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.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,590 ft³/s, Aug. 14, 1987, gage height, 11.35 ft; minimum daily discharge, .10 ft³/s, Sept. 30, 1953.
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 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	47	27	52	e40	265	153	47	54	354	8.7	12	107
2	40	32	52	e39	185	120	41	46	499	5.8	538	35
3	39	34	48	e38	135	110	39	40	236	6.2	428	29
4	325	28	46	e37	106	97	37	34	146	5.8	142	27
5	155	26	42	e35	84	84	48	30	243	4.8	74	24

6	145	42	38	e36	73	70	125	26	278	4.6	36	76
7	99	191	35	e38	60	62	88	34	170	270	26	330
8	85	118	36	e39	119	61	73	48	114	150	17	81
9	64	308	33	e40	819	51	94	40	94	69	46	93
10	51	447	29	40	901	47	87	39	94	37	352	93

11	45	238	32	39	676	61	102	443	69	28	185	46
12	39	169	93	43	509	73	257	550	516	19	73	35
13	34	174	63	49	419	103	199	334	419	14	35	30
14	31	135	66	73	335	91	127	266	236	9.5	22	21
15	30	102	54	150	309	180	132	411	228	6.1	16	14

16	35	90	44	197	229	406	102	325	156	5.1	261	11
17	29	69	38	163	147	351	83	255	127	61	162	18
18	33	54	e37	142	123	289	71	165	179	161	153	31
19	29	44	e40	112	98	280	63	116	114	53	294	747
20	28	39	e48	93	83	254	106	82	70	32	379	830

21	28	37	e42	72	76	258	207	86	82	23	190	956
22	25	35	e41	60	70	223	178	84	64	184	252	633
23	25	31	e42	52	58	177	223	61	48	235	722	533
24	45	29	e43	51	194	128	332	62	37	88	577	576
25	43	31	e42	45	645	94	157	63	33	349	561	487

26	32	60	e40	42	449	72	101	89	25	80	454	370
27	29	59	e39	38	261	58	88	389	23	36	266	260
28	35	53	e38	36	188	48	71	304	19	25	132	203
29	31	54	e39	68	---	45	62	212	13	19	93	153
30	27	53	e40	334	---	42	55	148	12	17	178	115

31	29	---	e39	360	---	38	---	148	---	12	755	---

TOTAL	1732	2809	1371	2601	7616	4126	3395	4984	4698	2018.6	7431	6964
MEAN	55.9	93.6	44.2	83.9	272	133	113	161	157	65.1	240	232
MAX	325	447	93	360	901	406	332	550	516	349	755	956
MIN	25	26	29	35	58	38	37	26	12	4.6	12	11
CFSM	.56	.94	.44	.84	2.72	1.33	1.13	1.61	1.57	.65	2.40	2.32
IN.	.64	1.04	.51	.97	2.83	1.53	1.26	1.85	1.75	.75	2.76	2.59

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2001, BY WATER YEAR (WY)
MEAN	61.4	80.2	82.5	78.8	108	170	192	126	106	80.5	78.0	71.0
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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1951 - 2001
ANNUAL TOTAL	39858		49745.6
ANNUAL MEAN	109		136		103
HIGHEST ANNUAL MEAN					171	1993
LOWEST ANNUAL MEAN					28.0	1963
HIGHEST DAILY MEAN	1220	Apr 21	956	Sep 21	2030	Aug 15 1987
LOWEST DAILY MEAN	14	Sep 4	4.6	Jul 6	.10	Sep 30 1953
ANNUAL SEVEN-DAY MINIMUM	16	Sep 2	6.8	Jun 30	1.3	Oct 9 1952
MAXIMUM PEAK FLOW			1380	Aug 30	2590	Aug 14 1987
MAXIMUM PEAK STAGE			8.37	Aug 30	11.35	Aug 14 1987
INSTANTANEOUS LOW FLOW			2.8	Jul 6
ANNUAL RUNOFF (CFSM)	1.09		1.36		1.03
ANNUAL RUNOFF (INCHES)	14.83		18.51		13.96
10 PERCENT EXCEEDS	259		350		247
50 PERCENT EXCEEDS	52		69		48
90 PERCENT EXCEEDS	21		27		13

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	47	27	52	e40	265	153	47	54	354	8.7	12	107
2	40	32	52	e39	185	120	41	46	499	5.8	538	35
3	39	34	48	e38	135	110	39	40	236	6.2	428	29
4	325	28	46	e37	106	97	37	34	146	5.8	142	27
5	155	26	42	e35	84	84	48	30	243	4.8	74	24

6	145	42	38	e36	73	70	125	26	278	4.6	36	76
7	99	191	35	e38	60	62	88	34	170	270	26	330
8	85	118	36	e39	119	61	73	48	114	150	17	81
9	64	308	33	e40	819	51	94	40	94	69	46	93
10	51	447	29	40	901	47	87	39	94	37	352	93

11	45	238	32	39	676	61	102	443	69	28	185	46
12	39	169	93	43	509	73	257	550	516	19	73	35
13	34	174	63	49	419	103	199	334	419	14	35	30
14	31	135	66	73	335	91	127	266	236	9.5	22	21
15	30	102	54	150	309	180	132	411	228	6.1	16	14

16	35	90	44	197	229	406	102	325	156	5.1	261	11
17	29	69	38	163	147	351	83	255	127	61	162	18
18	33	54	e37	142	123	289	71	165	179	161	153	31
19	29	44	e40	112	98	280	63	116	114	53	294	747
20	28	39	e48	93	83	254	106	82	70	32	379	830

21	28	37	e42	72	76	258	207	86	82	23	190	956
22	25	35	e41	60	70	223	178	84	64	184	252	633
23	25	31	e42	52	58	177	223	61	48	235	722	533
24	45	29	e43	51	194	128	332	62	37	88	577	576
25	43	31	e42	45	645	94	157	63	33	349	561	487

26	32	60	e40	42	449	72	101	89	25	80	454	370
27	29	59	e39	38	261	58	88	389	23	36	266	260
28	35	53	e38	36	188	48	71	304	19	25	132	203
29	31	54	e39	68	---	45	62	212	13	19	93	153
30	27	53	e40	334	---	42	55	148	12	17	178	115

31	29	---	e39	360	---	38	---	148	---	12	755	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	47	27	52	e40	265	153	47	54	354	8.7	12	107
2	40	32	52	e39	185	120	41	46	499	5.8	538	35
3	39	34	48	e38	135	110	39	40	236	6.2	428	29
4	325	28	46	e37	106	97	37	34	146	5.8	142	27
5	155	26	42	e35	84	84	48	30	243	4.8	74	24

6	145	42	38	e36	73	70	125	26	278	4.6	36	76
7	99	191	35	e38	60	62	88	34	170	270	26	330
8	85	118	36	e39	119	61	73	48	114	150	17	81
9	64	308	33	e40	819	51	94	40	94	69	46	93
10	51	447	29	40	901	47	87	39	94	37	352	93

11	45	238	32	39	676	61	102	443	69	28	185	46
12	39	169	93	43	509	73	257	550	516	19	73	35
13	34	174	63	49	419	103	199	334	419	14	35	30
14	31	135	66	73	335	91	127	266	236	9.5	22	21
15	30	102	54	150	309	180	132	411	228	6.1	16	14

16	35	90	44	197	229	406	102	325	156	5.1	261	11
17	29	69	38	163	147	351	83	255	127	61	162	18
18	33	54	e37	142	123	289	71	165	179	161	153	31
19	29	44	e40	112	98	280	63	116	114	53	294	747
20	28	39	e48	93	83	254	106	82	70	32	379	830

21	28	37	e42	72	76	258	207	86	82	23	190	956
22	25	35	e41	60	70	223	178	84	64	184	252	633
23	25	31	e42	52	58	177	223	61	48	235	722	533
24	45	29	e43	51	194	128	332	62	37	88	577	576
25	43	31	e42	45	645	94	157	63	33	349	561	487

26	32	60	e40	42	449	72	101	89	25	80	454	370
27	29	59	e39	38	261	58	88	389	23	36	266	260
28	35	53	e38	36	188	48	71	304	19	25	132	203
29	31	54	e39	68	---	45	62	212	13	19	93	153
30	27	53	e40	334	---	42	55	148	12	17	178	115

31	29	---	e39	360	---	38	---	148	---	12	755	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	47	27	52	e40	265	153	47	54	354	8.7	12	107
2	40	32	52	e39	185	120	41	46	499	5.8	538	35
3	39	34	48	e38	135	110	39	40	236	6.2	428	29
4	325	28	46	e37	106	97	37	34	146	5.8	142	27
5	155	26	42	e35	84	84	48	30	243	4.8	74	24

6	145	42	38	e36	73	70	125	26	278	4.6	36	76
7	99	191	35	e38	60	62	88	34	170	270	26	330
8	85	118	36	e39	119	61	73	48	114	150	17	81
9	64	308	33	e40	819	51	94	40	94	69	46	93
10	51	447	29	40	901	47	87	39	94	37	352	93

11	45	238	32	39	676	61	102	443	69	28	185	46
12	39	169	93	43	509	73	257	550	516	19	73	35
13	34	174	63	49	419	103	199	334	419	14	35	30
14	31	135	66	73	335	91	127	266	236	9.5	22	21
15	30	102	54	150	309	180	132	411	228	6.1	16	14

16	35	90	44	197	229	406	102	325	156	5.1	261	11
17	29	69	38	163	147	351	83	255	127	61	162	18
18	33	54	e37	142	123	289	71	165	179	161	153	31
19	29	44	e40	112	98	280	63	116	114	53	294	747
20	28	39	e48	93	83	254	106	82	70	32	379	830

21	28	37	e42	72	76	258	207	86	82	23	190	956
22	25	35	e41	60	70	223	178	84	64	184	252	633
23	25	31	e42	52	58	177	223	61	48	235	722	533
24	45	29	e43	51	194	128	332	62	37	88	577	576
25	43	31	e42	45	645	94	157	63	33	349	561	487

26	32	60	e40	42	449	72	101	89	25	80	454	370
27	29	59	e39	38	261	58	88	389	23	36	266	260
28	35	53	e38	36	188	48	71	304	19	25	132	203
29	31	54	e39	68	---	45	62	212	13	19	93	153
30	27	53	e40	334	---	42	55	148	12	17	178	115

31	29	---	e39	360	---	38	---	148	---	12	755	---