05527950 DATA: Discharge Tables, 1999

Station list Available data
ILLINOIS RIVER BASIN

05527950 MILL CREEK AT OLD MILL CREEK, IL

LOCATION.--Lat 42°24'55", long 87°58'08", in SW1/4SE1/4 sec.32, T.46 N., R.11 E., Lake County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on Hunt Club Road, about 0.5 mi southeast of Old Mill Creek, and at mile 2.9.

DRAINAGE AREA.--61.0 mi².

PERIOD OF RECORD.--Annual maximum, water years 1962 to 1976. October 1989 to current year.

REVISED RECORDS.--WDR IL-77-1: 1962-76(M). WDR IL-91-2: 1990(P). WDR IL-92-2: 1990.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 668.00 ft above sea level. Prior to Oct. 1, 1989, at datum 8.85 ft higher.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Gage-height telemeter at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 1,160 ft³/s, April 23, 1999, gage height, 12.21 ft; maximum gage height, 12.88 ft, present datum, Mar. 6, 1976; minimum discharge, 0.03 ft³/s, Sept. 7, 8, 10, 11, 1991.

EXTREMES OUTSIDE PERIOD OF RECORD.--A gage height of 13.73 ft, present datum, discharge unknown, occurred between October 1976 and September 1989, from mark on crest-stage gage.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.6	23	15	9.4	214	59	37	181	30	49	1.4	2.4
2	1.7	21	13	13	252	57	34	151	80	43	1.4	1.9
3	3.8	18	12	e13	254	63	31	132	71	37	1.3	1.5
4	4.9	17	12	e13	230	57	32	116	59	31	1.3	1.2
5	7.2	16	11	e12	185	52	31	102	52	26	1.3	1.1

6	11	14	16	e12	170	51	31	93	45	22	1.3	1.1
7	11	14	76	e12	158	46	29	85	41	18	1.3	1.0
8	8.4	13	61	e12	144	45	27	76	36	16	1.3	1.0
9	6.4	12	54	e12	141	47	93	69	33	15	1.2	1.0
10	5.4	72	51	e12	132	48	102	61	35	13	1.2	.99

11	4.9	84	49	e12	156	45	86	56	33	12	1.1	1.0
12	4.9	64	46	e13	225	44	78	59	31	11	1.3	1.2
13	4.5	54	43	e13	161	46	73	53	317	9.4	1.3	1.5
14	4.3	49	40	e13	144	46	68	46	351	7.2	1.2	1.3
15	4.2	45	39	e13	133	48	66	42	201	5.9	1.1	1.2

16	4.0	41	38	13	126	60	225	41	165	4.9	1.0	1.3
17	10	37	35	13	117	127	181	72	142	4.4	1.0	1.3
18	83	33	32	18	106	127	152	84	121	4.5	1.0	1.3
19	53	29	30	18	96	104	140	86	103	4.3	1.4	1.3
20	44	26	28	18	87	94	127	74	86	4.1	1.2	1.3

21	36	23	27	17	78	87	123	65	74	3.5	1.1	1.4
22	29	21	23	126	71	79	297	67	63	2.7	1.1	1.4
23	25	20	e19	340	64	71	777	62	54	2.4	1.4	1.4
24	22	18	17	410	60	64	459	58	49	3.2	5.2	1.4
25	19	17	16	270	57	58	396	52	43	2.9	8.3	1.3

26	17	16	15	236	55	52	360	46	36	2.4	7.2	1.3
27	16	15	14	256	58	49	316	46	32	2.1	5.6	1.8
28	18	14	13	327	60	51	310	44	61	1.7	4.4	39
29	17	14	13	273	---	50	256	39	71	1.5	3.4	64
30	26	14	10	243	---	46	217	32	54	1.5	2.8	41

31	26	---	11	229	---	41	---	29	---	1.5	2.7	---

TOTAL	529.2	854	879	2991.4	3734	1914	5154	2219	2569	363.1	67.8	179.89
MEAN	17.1	28.5	28.4	96.5	133	61.7	172	71.6	85.6	11.7	2.19	6.00
MAX	83	84	76	410	254	127	777	181	351	49	8.3	64
MIN	1.6	12	10	9.4	55	41	27	29	30	1.5	1.0	.99
CFSM	.28	.47	.47	1.58	2.19	1.01	2.82	1.17	1.40	.19	.04	.10
IN.	.32	.52	.54	1.83	2.28	1.17	3.15	1.35	1.57	.22	.04	.11

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1999, BY WATER YEAR (WY)
MEAN	9.07	42.4	43.6	54.7	77.7	100	123	87.6	59.6	29.5	10.6	6.74
MAX	34.1	127	106	126	134	157	297	245	188	168	44.0	24.6
(WY)	1991	1993	1992	1993	1997	1993	1993	1996	1996	1993	1990	1992
MIN	1.38	7.59	6.15	8.27	25.2	22.9	28.5	11.9	3.45	1.00	.55	.48
(WY)	1995	1990	1990	1994	1996	1996	1994	1994	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1990 - 1999
ANNUAL TOTAL	21747.92		21454.39
ANNUAL MEAN	59.6		58.8		53.4
HIGHEST ANNUAL MEAN					102	1993
LOWEST ANNUAL MEAN					29.3	1994
HIGHEST DAILY MEAN	491	Apr 16	777	Apr 23	777	Apr 23 1999
LOWEST DAILY MEAN	.68	Aug 3	.99	Sep 10	.03	Sep 11 1991
ANNUAL SEVEN-DAY MINIMUM	.80	Jul 30	1.0	Sep 5	.05	Sep 5 1991
INSTANTANEOUS PEAK FLOW			1160	Apr 23	1160	Apr 23 1999
INSTANTANEOUS PEAK STAGE			12.21	Apr 23	12.21	Apr 23 1999
INSTANTANEOUS LOW FLOW			.90	A	.03	B
ANNUAL RUNOFF (CFSM)	.98		.96		.88
ANNUAL RUNOFF (INCHES)	13.27		13.09		11.91
10 PERCENT EXCEEDS	151		151		141
50 PERCENT EXCEEDS	32		32		26
90 PERCENT EXCEEDS	1.7		1.3		2.0

A - Aug. 18, Sept. 9-11.
B - Sept. 7, 8, 10, 11, 1991.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.6	23	15	9.4	214	59	37	181	30	49	1.4	2.4
2	1.7	21	13	13	252	57	34	151	80	43	1.4	1.9
3	3.8	18	12	e13	254	63	31	132	71	37	1.3	1.5
4	4.9	17	12	e13	230	57	32	116	59	31	1.3	1.2
5	7.2	16	11	e12	185	52	31	102	52	26	1.3	1.1

6	11	14	16	e12	170	51	31	93	45	22	1.3	1.1
7	11	14	76	e12	158	46	29	85	41	18	1.3	1.0
8	8.4	13	61	e12	144	45	27	76	36	16	1.3	1.0
9	6.4	12	54	e12	141	47	93	69	33	15	1.2	1.0
10	5.4	72	51	e12	132	48	102	61	35	13	1.2	.99

11	4.9	84	49	e12	156	45	86	56	33	12	1.1	1.0
12	4.9	64	46	e13	225	44	78	59	31	11	1.3	1.2
13	4.5	54	43	e13	161	46	73	53	317	9.4	1.3	1.5
14	4.3	49	40	e13	144	46	68	46	351	7.2	1.2	1.3
15	4.2	45	39	e13	133	48	66	42	201	5.9	1.1	1.2

16	4.0	41	38	13	126	60	225	41	165	4.9	1.0	1.3
17	10	37	35	13	117	127	181	72	142	4.4	1.0	1.3
18	83	33	32	18	106	127	152	84	121	4.5	1.0	1.3
19	53	29	30	18	96	104	140	86	103	4.3	1.4	1.3
20	44	26	28	18	87	94	127	74	86	4.1	1.2	1.3

21	36	23	27	17	78	87	123	65	74	3.5	1.1	1.4
22	29	21	23	126	71	79	297	67	63	2.7	1.1	1.4
23	25	20	e19	340	64	71	777	62	54	2.4	1.4	1.4
24	22	18	17	410	60	64	459	58	49	3.2	5.2	1.4
25	19	17	16	270	57	58	396	52	43	2.9	8.3	1.3

26	17	16	15	236	55	52	360	46	36	2.4	7.2	1.3
27	16	15	14	256	58	49	316	46	32	2.1	5.6	1.8
28	18	14	13	327	60	51	310	44	61	1.7	4.4	39
29	17	14	13	273	---	50	256	39	71	1.5	3.4	64
30	26	14	10	243	---	46	217	32	54	1.5	2.8	41

31	26	---	11	229	---	41	---	29	---	1.5	2.7	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.6	23	15	9.4	214	59	37	181	30	49	1.4	2.4
2	1.7	21	13	13	252	57	34	151	80	43	1.4	1.9
3	3.8	18	12	e13	254	63	31	132	71	37	1.3	1.5
4	4.9	17	12	e13	230	57	32	116	59	31	1.3	1.2
5	7.2	16	11	e12	185	52	31	102	52	26	1.3	1.1

6	11	14	16	e12	170	51	31	93	45	22	1.3	1.1
7	11	14	76	e12	158	46	29	85	41	18	1.3	1.0
8	8.4	13	61	e12	144	45	27	76	36	16	1.3	1.0
9	6.4	12	54	e12	141	47	93	69	33	15	1.2	1.0
10	5.4	72	51	e12	132	48	102	61	35	13	1.2	.99

11	4.9	84	49	e12	156	45	86	56	33	12	1.1	1.0
12	4.9	64	46	e13	225	44	78	59	31	11	1.3	1.2
13	4.5	54	43	e13	161	46	73	53	317	9.4	1.3	1.5
14	4.3	49	40	e13	144	46	68	46	351	7.2	1.2	1.3
15	4.2	45	39	e13	133	48	66	42	201	5.9	1.1	1.2

16	4.0	41	38	13	126	60	225	41	165	4.9	1.0	1.3
17	10	37	35	13	117	127	181	72	142	4.4	1.0	1.3
18	83	33	32	18	106	127	152	84	121	4.5	1.0	1.3
19	53	29	30	18	96	104	140	86	103	4.3	1.4	1.3
20	44	26	28	18	87	94	127	74	86	4.1	1.2	1.3

21	36	23	27	17	78	87	123	65	74	3.5	1.1	1.4
22	29	21	23	126	71	79	297	67	63	2.7	1.1	1.4
23	25	20	e19	340	64	71	777	62	54	2.4	1.4	1.4
24	22	18	17	410	60	64	459	58	49	3.2	5.2	1.4
25	19	17	16	270	57	58	396	52	43	2.9	8.3	1.3

26	17	16	15	236	55	52	360	46	36	2.4	7.2	1.3
27	16	15	14	256	58	49	316	46	32	2.1	5.6	1.8
28	18	14	13	327	60	51	310	44	61	1.7	4.4	39
29	17	14	13	273	---	50	256	39	71	1.5	3.4	64
30	26	14	10	243	---	46	217	32	54	1.5	2.8	41

31	26	---	11	229	---	41	---	29	---	1.5	2.7	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.6	23	15	9.4	214	59	37	181	30	49	1.4	2.4
2	1.7	21	13	13	252	57	34	151	80	43	1.4	1.9
3	3.8	18	12	e13	254	63	31	132	71	37	1.3	1.5
4	4.9	17	12	e13	230	57	32	116	59	31	1.3	1.2
5	7.2	16	11	e12	185	52	31	102	52	26	1.3	1.1

6	11	14	16	e12	170	51	31	93	45	22	1.3	1.1
7	11	14	76	e12	158	46	29	85	41	18	1.3	1.0
8	8.4	13	61	e12	144	45	27	76	36	16	1.3	1.0
9	6.4	12	54	e12	141	47	93	69	33	15	1.2	1.0
10	5.4	72	51	e12	132	48	102	61	35	13	1.2	.99

11	4.9	84	49	e12	156	45	86	56	33	12	1.1	1.0
12	4.9	64	46	e13	225	44	78	59	31	11	1.3	1.2
13	4.5	54	43	e13	161	46	73	53	317	9.4	1.3	1.5
14	4.3	49	40	e13	144	46	68	46	351	7.2	1.2	1.3
15	4.2	45	39	e13	133	48	66	42	201	5.9	1.1	1.2

16	4.0	41	38	13	126	60	225	41	165	4.9	1.0	1.3
17	10	37	35	13	117	127	181	72	142	4.4	1.0	1.3
18	83	33	32	18	106	127	152	84	121	4.5	1.0	1.3
19	53	29	30	18	96	104	140	86	103	4.3	1.4	1.3
20	44	26	28	18	87	94	127	74	86	4.1	1.2	1.3

21	36	23	27	17	78	87	123	65	74	3.5	1.1	1.4
22	29	21	23	126	71	79	297	67	63	2.7	1.1	1.4
23	25	20	e19	340	64	71	777	62	54	2.4	1.4	1.4
24	22	18	17	410	60	64	459	58	49	3.2	5.2	1.4
25	19	17	16	270	57	58	396	52	43	2.9	8.3	1.3

26	17	16	15	236	55	52	360	46	36	2.4	7.2	1.3
27	16	15	14	256	58	49	316	46	32	2.1	5.6	1.8
28	18	14	13	327	60	51	310	44	61	1.7	4.4	39
29	17	14	13	273	---	50	256	39	71	1.5	3.4	64
30	26	14	10	243	---	46	217	32	54	1.5	2.8	41

31	26	---	11	229	---	41	---	29	---	1.5	2.7	---