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



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data