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Groundwater levels for the Nation

! Important: Next Generation Monitoring Location Page

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Agency code = usgs
site_no list =
  • 421534088502001
Minimum number of levels = 1
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USGS 421534088502001 44N 3E-25.7c1

Boone County, Illinois
Latitude  42°15'34", Longitude  88°50'19" NAD27
Land-surface elevation 758.6 feet above NGVD29
The depth of the well is 1,860.0 feet below land surface.
The depth of the hole is 1,861 feet below land surface.
This well is completed in the Cambrian-Ordovician aquifer system (S300CAMORD) national aquifer.
This well is completed in the Ordovician-Cambrian Systems (367OVCB) local aquifer.
Output formats
Table of data
Tab-separated data
Graph of data
Reselect period
Date Time
?
 
Water-level
date-time
accuracy
?
 
Parameter
code 		Water
level,
feet
below
land
surface		 Water
level,
feet
above
specific
vertical
datum		 Referenced
vertical
datum
?
 
Status
?
 
Method of
measurement
?
 
Measuring
agency
?
 
Source of
measurement
?
 
Water-level
approval
status
1901 Y62610 755.60NGVD291O  A
1901 Y62611 755.35NAVD881O  A
1901 Y720193.00  1O  A
1941 Y62610 748.60NGVD291O  A
1941 Y62611 748.35NAVD881O  A
1941 Y7201910.00  1O  A
1951 Y62610 742.80NGVD291O  A
1951 Y62611 742.55NAVD881O  A
1951 Y7201915.80  1O  A
1993-07-20 D62610 734.99NGVD291S  A
1993-07-20 D62611 734.74NAVD881S  A
1993-07-20 D7201923.61  1S  A

Explanation
SectionCodeDescription
Water-level date-time accuracyDDate is accurate to the Day
Water-level date-time accuracyYDate is accurate to the Year
Parameter code62610Groundwater level above NGVD 1929, feet
Parameter code62611Groundwater level above NAVD 1988, feet
Parameter code72019Depth to water level, feet below land surface
Referenced vertical datumNAVD88North American Vertical Datum of 1988
Referenced vertical datumNGVD29National Geodetic Vertical Datum of 1929
Status1Static
Method of measurementOObserved.
Method of measurementSSteel-tape measurement.
Measuring agencyNot determined
Source of measurementNot determined
Water-level approval statusAApproved for publication -- Processing and review completed.