04087440 DATA: Stage Tables, 1998

Station list Available data
ST. LAWRENCE RIVER BASIN

04087440 LAKE MICHIGAN AT CHICAGO LOCK AND DAM AT CHICAGO, IL

LOCATION.--Lat 41°53'18", long 87°36'27", in NE1/4 SE1/4 sec.10, T.39 N., R.14 E., Cook County, Hydrologic Unit 04060200, on the lakeside of the downstream left guidewall, approximately 75 ft west of the riverside gates of the Chicago Lock.

DRAINAGE AREA.--Indeterminate.

PERIOD OF RECORD.--August 1997 to current year.

GAGE.--Water-stage recorder. Datum of gage is 579.48 ft above sea level (Chicago City Datum).

REMARKS.--Gage provides stage data to determine Illinois' diversion of Lake Michigan water. Gage-height telemeter at station.

EXTREMES FOR PERIOD OF RECORD.--Maximum gage height, 3.84 ft, May 31, 1998; minimum, -1.49 ft., Mar. 26, 1998.

EXTREMES FOR CURRENT YEAR.--Maximum gage height, 3.84 ft, May 31, minimum, -1.49 ft, Mar.26.

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	1.97	1.51	1.23	-.23	.37	---	1.40	1.75	1.29	1.50	1.24	---
2	1.66	1.52	1.26	-.06	.92	---	1.33	1.67	1.46	1.49	1.21	---
3	1.95	1.55	1.32	.50	1.00	---	1.50	1.75	1.36	1.49	1.23	---
4	1.92	1.63	1.23	.87	1.05	---	1.50	1.67	1.45	1.79	1.27	---
5	1.78	1.58	1.12	1.33	1.01	---	1.46	1.61	1.45	1.52	1.33	---

6	2.02	1.67	1.10	1.12	.96	---	1.46	1.69	1.44	1.68	1.38	---
7	2.08	1.66	1.06	1.13	1.00	---	e1.28	1.83	1.40	1.84	1.42	---
8	1.96	1.68	1.08	1.25	.94	---	---	1.89	1.48	1.68	1.31	---
9	1.71	1.63	1.29	1.16	.91	---	---	1.77	1.28	1.61	1.25	---
10	1.74	1.60	1.37	.66	.98	.74	---	1.74	1.62	1.69	1.30	---

11	1.76	1.47	1.33	.63	1.12	.89	---	1.69	1.41	1.54	1.35	---
12	1.47	1.44	.89	.91	.61	.51	---	1.67	1.53	1.47	1.30	---
13	1.43	1.32	.85	.75	.94	-.03	---	1.72	1.45	1.42	1.25	1.20
14	1.55	1.66	.89	.86	1.02	.79	---	1.62	1.59	1.39	1.18	1.19
15	1.82	1.62	.56	1.31	.74	.92	---	1.41	1.63	1.40	1.33	1.17

16	1.96	1.19	.69	1.19	.92	.85	---	1.46	1.60	1.46	1.20	1.05
17	1.84	.84	.94	1.07	1.21	.87	---	1.37	1.54	1.40	1.19	1.01
18	1.72	.98	.76	1.08	1.20	1.34	---	1.46	1.58	1.37	1.34	1.05
19	1.65	1.24	.95	.98	e1.00	1.52	---	1.54	1.55	1.28	1.00	1.03
20	1.47	1.22	1.05	1.03	---	1.40	---	1.51	1.49	1.28	.91	.96

21	1.76	1.46	.91	1.07	---	1.23	---	1.60	1.53	1.16	1.14	.58
22	1.55	1.28	1.06	1.32	---	1.07	---	1.66	1.47	1.29	1.10	.72
23	1.27	1.16	1.08	1.24	---	.94	e1.48	1.62	1.53	1.33	.95	.53
24	1.76	.90	.83	1.00	---	.96	1.56	1.55	1.49	1.26	e.94	.70
25	1.84	.65	1.07	.81	---	.66	1.60	1.53	1.44	1.36	---	.69

26	1.71	1.07	.78	1.17	---	.27	1.85	1.57	1.48	1.23	---	.57
27	1.69	.69	.91	1.14	---	.37	1.64	1.57	1.56	1.05	---	.82
28	1.27	1.26	.46	.96	---	.90	1.54	1.36	1.58	1.14	---	.83
29	1.44	1.47	1.07	1.04	---	.67	1.62	1.48	1.42	1.13	---	.67
30	1.17	1.42	.96	.90	---	.85	1.67	1.60	1.53	1.31	---	.51

31	1.44	---	.72	.67	---	1.19	---	1.58	---	1.28	---	---

MEAN	1.69	1.35	.99	.93	---	---	---	1.61	1.49	1.41	---	---
MAX	2.08	1.68	1.37	1.33	---	---	---	1.89	1.63	1.84	---	---
MIN	1.17	.65	.46	-.23	---	---	---	1.36	1.28	1.05	---	---

e Estimated