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Groundwater levels for the Nation

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  • 422804092165301
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USGS 422804092165301 088N12W06AABD 1971Evansdale 4

Black Hawk County, Iowa
Latitude  42°28'05", Longitude  92°16'53" NAD27
Land-surface elevation 837.82 feet above NGVD29
The depth of the well is 305 feet below land surface.
The depth of the hole is 305 feet below land surface.
This well is completed in the Silurian System (350SLRN) local aquifer.
Output formats
Table of data
Tab-separated 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
1971-07-01 D62610 823.82NGVD291L  A
1971-07-01 D62611 823.76NAVD881L  A
1971-07-01 D7201914.00  1L  A
1998-04-2714:15 UTCm62610 775.82NGVD291T  A
1998-04-2714:15 UTCm62611 775.76NAVD881T  A
1998-04-2714:15 UTCm7201962.00  1T  A
1998-06-2515:15 UTCm62610 770.82NGVD291T  A
1998-06-2515:15 UTCm62611 770.76NAVD881T  A
1998-06-2515:15 UTCm7201967.00  1T  A
1998-08-2714:00 UTCm62610 764.82NGVD291T  A
1998-08-2714:00 UTCm62611 764.76NAVD881T  A
1998-08-2714:00 UTCm7201973.00  1T  A
1998-10-2816:00 UTCm62610 762.82NGVD291T  A
1998-10-2816:00 UTCm62611 762.76NAVD881T  A
1998-10-2816:00 UTCm7201975.00  1T  A
1998-12-3015:25 UTCm62610 765.82NGVD291A  A
1998-12-3015:25 UTCm62611 765.76NAVD881A  A
1998-12-3015:25 UTCm7201972.00  1A  A
1999-02-2517:05 UTCm62610 814.82NGVD291A  A
1999-02-2517:05 UTCm62611 814.76NAVD881A  A
1999-02-2517:05 UTCm7201923.00  1A  A

Explanation
SectionCodeDescription
Water-level date-time accuracyDDate is accurate to the Day
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.
Method of measurementTElectric-tape measurement.
Measuring agencyNot determined
Source of measurementNot determined
Water-level approval statusAApproved for publication -- Processing and review completed.