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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Information Water-quality 2005-12-19 2005-12-19
Inorganics, Major, Non-metals Water-quality 2005-12-19 2005-12-19
Physical Daily Values, Unit Values, Water-quality 1997-08-15 2024-11-08
n/a USGS Annual Water Data Reports Site 2008-01-01 2023-01-01
Water Data for the Nation inventory

Monitoring location 04087440 is associated with a Lake, Reservoir, Impoundment in Cook County, Illinois. Current conditions of Gage height are available. Water data back to 1997 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
04087440 n/a
Site name
LAKE MICHIGAN AT CHICAGO LOCK AT CHICAGO, IL n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 415321.4 n/a
DMS longitude 0873628.6 n/a
Decimal latitude 41.88927778 n/a
Decimal longitude -87.6079444 n/a
Latitude-longitude method
GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System X
Latitude-longitude accuracy
Accurate to + or - 5 sec. F
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Illinois 17
State
Illinois 17
County
Cook County 031
Country US n/a
Land net location description NENESES10 T39N R14E n/a
Name of location map CHICAGO LOOP n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 579.20 feet n/a
Method altitude determined GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System X
Altitude accuracy .10 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
04060200
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNYNNNNNNNNNNNYNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried 20070907 n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation CST n/a
Site honors Daylight Saving Time
N n/a
Data reliability
n/a
Data-other GW files NNNNNNNN n/a
National aquifer n/a
Local aquifer n/a
Local aquifer type
n/a
Well depth n/a
Hole depth
n/a
Source of depth data n/a
Project number 00100 n/a

Operated in cooperation with:

logo for US Army Corps of Engineers - Chicago District
US Army Corps of Engineers - Chicago District