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Groundwater levels for the Nation

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Agency code = usgs
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  • 421857092115601
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USGS 421857092115601 087N12W25CBCD 1961La Porte City 3

Black Hawk County, Iowa
Latitude  42°18'57", Longitude  92°11'56" NAD27
Land-surface elevation 836.11 feet above NGVD29
The depth of the well is 250 feet below land surface.
The depth of the hole is 250 feet below land surface.
This well is completed in the Silurian System (350SLRN) local aquifer.
Output formats
Table of data
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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
1961-10 M62610 793.11NGVD291L  A
1961-10 M62611 793.04NAVD881L  A
1961-10 M7201943.00  1L  A
1998-04-2718:30 UTCm62610 753.11NGVD291A  A
1998-04-2718:30 UTCm62611 753.04NAVD881A  A
1998-04-2718:30 UTCm7201983.00  1A  A
1998-07-0216:00 UTCm62610 748.51NGVD291A  A
1998-07-0216:00 UTCm62611 748.44NAVD881A  A
1998-07-0216:00 UTCm7201987.60  1A  A
1998-08-2516:00 UTCm62610 736.96NGVD291A  A
1998-08-2516:00 UTCm62611 736.89NAVD881A  A
1998-08-2516:00 UTCm7201999.15  1A  A
1998-10-2717:00 UTCm62610 736.96NGVD291A  A
1998-10-2717:00 UTCm62611 736.89NAVD881A  A
1998-10-2717:00 UTCm7201999.15  1A  A
1998-12-2919:45 UTCm62610 736.96NGVD291A  A
1998-12-2919:45 UTCm62611 736.89NAVD881A  A
1998-12-2919:45 UTCm7201999.15  1A  A
1999-02-2516:00 UTCm62610 736.96NGVD291A  A
1999-02-2516:00 UTCm62611 736.89NAVD881A  A
1999-02-2516:00 UTCm7201999.15  1A  A

Explanation
SectionCodeDescription
Water-level date-time accuracyMDate is accurate to the Month
Water-level date-time accuracymDate is accurate to the Minute
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 measurementAAirline measurement.
Method of measurementLInterpreted from geophysical logs.
Measuring agencyNot determined
Source of measurementNot determined
Water-level approval statusAApproved for publication -- Processing and review completed.