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, -2.70 ft., Dec. 18, 1998.

EXTREMES FOR CURRENT YEAR.--Maximum gage height, 1.74 ft, Dec. 29, minimum, -2.70 ft, Dec. 18.
GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 .38 .66 -.65 -.25 -.08 -.73 -.46 -.16 .04 .10 .11 -.19
2 -.01 .65 -.30 .44 -.25 -.46 -.27 -.13 .08 .00 .09 -.12
3 .80 .56 .06 .13 -1.47 -.45 -.28 -.06 -.11 -.18 .04 -.08
4 .88 .55 .19 -.21 -.32 -.69 -.02 -.28 -.15 -.07 .10 -.14
5 .86 .53 .33 -.69 -1.11 -.36 -.35 -.86 -.14 -.14 .05 -.21
 
6 .83 .47 .33 -.46 -.20 -.16 -.81 -.30 -.19 -.05 -.01 -.13
7 .74 .35 .00 -.63 -.21 -.48 -.87 -.86 -.19 -.01 -.04 -.38
8 .73 .44 .09 -.31 -.67 -1.63 -.25 -.27 -.09 -.11 .18 -.39
9 .77 -.02 -.10 -.23 -.42 -.75 -.41 -.29 .00 .08 -.26 -.36
10 .69 -1.23 -.04 -.49 -.58 -.32 -.69 -.16 .06 .13 -.04 -.51
 
11 --- -.41 -.22 -.48 -1.61 -.26 -.06 -.07 -.01 .08 .04 -.59
12 --- -.27 -.19 -.01 -.52 -.35 -.32 -.01 -.01 .20 -.46 -.53
13 .67 .06 .10 .40 -.70 -.40 -.22 -.06 .13 .12 -.08 -.52
14 .66 .18 -.19 .16 -1.32 -.47 -.24 -.05 .06 -.09 -.09 -.67
15 .46 -.01 -.39 -.27 -.98 -.44 -.51 -.01 -.21 -.09 -.09 -.55
 
16 .30 .13 .00 -.63 -.07 -.69 -.23 -.20 .15 -.05 -.40 -.54
17 .07 .34 .03 -.41 -.06 -.80 -.34 -.47 .03 .05 -.06 -.58
18 .00 -.35 -.88 -.48 -.15 -.60 -.40 -.21 -.02 .10 .10 -.65
19 .22 .11 .10 -.49 -.06 -.59 -.23 -.20 -.03 .20 -.23 -.66
20 .33 .02 .00 -.36 .00 -.41 -.26 -.12 .11 .22 .01 -.51
 
21 .64 -.22 .12 .03 -.23 -.43 -.18 -.10 .16 .16 -.09 -.71
22 .42 -1.18 -.52 .19 -.51 -.85 -.13 -.08 .06 .14 -.08 -.64
23 .20 -.43 -.70 .12 -.81 -.68 -.17 -.10 -.15 .06 -.45 -.72
24 .20 -.24 -.82 -.29 -.46 -.55 -.25 -.13 .05 .07 -.04 -.67
25 .49 -.15 -1.28 -.22 -.13 -.41 -.27 -.47 -.03 .08 .04 -.66
 
26 .63 .03 -.61 -.34 -.60 -.43 -.24 -.28 .01 .16 .09 -1.36
27 .47 -.04 -.98 -.21 -.47 -.35 -.11 -.20 .01 .15 -.02 -.71
28 .54 .16 -.56 .06 -.19 -.65 -.03 -.14 .12 .04 -.09 -.39
29 .32 -.24 -.45 -.26 --- -.62 -.20 -.16 -.16 -.05 -.09 -.66
30 .68 -.23 -.47 -.13 --- -.65 -.18 -.21 -.09 .07 -.50 -.81
 
31 .62 --- -.38 -.36 --- -1.44 --- -.27 --- .11 -.54 ---

MEAN --- .01 -.27 -.22 -.51 -.58 -.30 -.22 -.02 .05 -.09 -.52
MAX --- .66 .33 .44 .00 -.16 -.02 -.01 .16 .22 .18 -.08
MIN --- -1.23 -1.28 -.69 -1.61 -1.63 -.87 -.86 -.21 -.18 -.54 -1.36


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data