Station list     Available data
ILLINOIS RIVER BASIN


05536121       CHICAGO RIVER AT CHICAGO LOCK AT CHICAGO, IL



LOCATION.-- Lat 41°53'18", long 87°36'27", in NE1/4SE1/4 sec.10, T.39 N., R.14 E., Cook County, Hydrologic Unit 07120003, 0.2 mi east of Lake Shore Drive in Chicago, on left downstream side of lock guidewall, 100 ft downstream of the river-side lock gates at the Chicago River Lock and Dam.

DRAINAGE AREA.-- Indeterminate.

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

GAGE.-- Water-stage recorder, phone telemeter, and rain gage. 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.

EXTREMES FOR PERIOD OF RECORD.--
STAGE: Maximum gage height, 4.14 ft, Aug. 16, 1997; minimum, -2.89 ft., May 15, 2000.

EXTREMES FOR CURRENT YEAR.-- Maximum gage height, 2.62 ft, Sept. 12; minimum, -2.89 ft, May 15.
GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 -1.26 -1.84 -1.76 -2.21 -1.85 -1.93 -2.11 -1.70 -1.88 -1.74 -1.72 -1.76
2 -1.40 -1.86 -1.87 -2.08 -1.93 -1.76 -2.05 -1.83 -1.83 -1.87 -1.75 -1.81
3 -1.34 -1.95 -1.72 -1.94 -1.86 -1.71 -2.01 -1.88 -1.95 -1.41 -1.83 -1.86
4 -1.34 -1.86 -1.74 -1.80 -1.85 -1.72 -1.82 -1.89 -1.91 -1.58 -1.81 -1.80
5 -1.27 -1.75 -1.79 -1.89 -1.87 -1.74 -1.86 -1.77 -1.95 -1.70 -1.87 -1.89
 
6 -1.36 -1.88 -1.68 -2.22 -1.94 -1.92 -2.20 -2.02 -1.98 -1.75 -1.64 -1.86
7 -1.53 -1.84 -1.69 -2.16 -2.02 -1.86 -2.02 -2.22 -1.75 -1.76 -1.85 -1.82
8 -1.53 -1.73 -1.67 -1.94 -1.84 -1.84 -1.72 -2.08 -1.77 -1.79 -1.80 -1.91
9 -1.53 -1.88 -1.77 -1.83 -1.88 -1.90 -1.83 -1.98 -1.82 -1.78 -1.69 -1.81
10 -1.59 -1.75 -1.75 -1.70 -1.75 -1.94 -1.83 -1.76 -1.79 -1.80 -1.75 -1.75
 
11 -1.54 -1.97 -1.86 -2.00 -1.76 -2.00 -1.80 -1.67 -1.77 -1.60 -1.86 -1.04
12 -1.48 -1.84 -1.77 -2.07 -2.08 -1.80 -1.95 -1.74 -1.95 -1.74 -1.81 -.29
13 -1.66 -1.77 -1.76 -1.96 -1.89 -1.84 -1.93 -1.44 -1.86 -1.89 -1.88 -1.75
14 -1.66 -1.77 -1.82 -1.90 -1.90 -1.83 -2.14 -1.48 -1.82 -1.94 -1.79 -1.79
15 -1.59 -1.95 -1.73 -1.75 -1.90 -1.80 -2.05 -2.03 -1.71 -1.86 -1.70 -1.81
 
16 -1.57 -1.98 -1.85 -1.97 -1.84 -1.91 -1.92 -2.53 -1.84 -1.95 -1.78 -1.70
17 -1.69 -1.84 -2.00 -1.82 -1.81 -1.77 -1.59 -2.56 -1.73 -1.89 -1.76 -1.77
18 -1.74 -1.71 -1.88 -1.87 -2.00 -1.72 -1.83 -2.62 -1.91 -1.84 -1.86 -1.90
19 -1.79 -1.77 -1.86 -1.96 -1.84 -1.99 -1.68 -1.64 -1.88 -1.76 -1.75 -1.91
20 -1.87 -1.84 -1.82 -1.89 -1.89 -1.83 -.70 -1.60 -1.73 -1.81 -1.77 -1.89
 
21 -1.77 -1.72 -1.90 -1.87 -1.81 -1.83 -.97 -1.52 -1.86 -1.89 -1.88 -1.95
22 -1.75 -1.81 -1.79 -1.87 -1.70 -1.91 -1.61 -1.78 -1.84 -1.84 -1.86 -2.00
23 -1.69 -1.79 -1.78 -1.72 -1.68 -1.88 -1.60 -1.78 -1.92 -1.88 -1.70 -1.85
24 -1.69 -1.82 -2.12 -1.81 -1.64 -1.88 -1.72 -1.78 -1.87 -1.76 -1.74 -1.69
25 -1.79 -1.66 -1.96 -1.88 -1.69 -1.93 -1.62 -1.87 -1.55 -1.85 -1.85 -1.80
 
26 -1.85 -1.82 -2.19 -1.84 -1.71 -1.79 -1.82 -1.89 -1.76 -1.80 -1.85 -1.92
27 -1.97 -1.76 -2.03 -1.85 -1.73 -1.83 -1.79 -1.90 -1.84 -1.80 -1.84 -1.88
28 -1.88 -1.66 -1.84 -1.86 -1.83 -1.93 -1.84 -1.63 -1.68 -1.82 -1.83 -1.87
29 -1.72 -1.74 -1.97 -1.88 -1.85 -1.76 -1.95 -1.59 -1.69 -1.77 -1.82 -1.92
30 -1.67 -1.78 -2.17 -1.84 --- -1.91 -1.81 -1.66 -1.85 -1.78 -1.83 -1.97
 
31 -1.79 --- -2.06 -1.81 --- -1.88 --- -1.74 --- -1.81 -1.77 ---

MEAN -1.62 -1.81 -1.86 -1.91 -1.84 -1.85 -1.79 -1.86 -1.82 -1.79 -1.79 -1.77
MAX -1.26 -1.66 -1.67 -1.70 -1.64 -1.71 -.70 -1.44 -1.55 -1.41 -1.64 -.29
MIN -1.97 -1.98 -2.19 -2.22 -2.08 -2.00 -2.20 -2.62 -1.98 -1.95 -1.88 -2.00

WTR YR 2000 MEAN -1.81 MAX -.29 MIN -2.62


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data