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Groundwater levels for the Nation

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Agency code = usgs
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  • 420423091402801
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USGS 420423091402801 084N07W21BCCA

Linn County, Iowa
Latitude  42°04'23", Longitude  91°40'28" NAD27
Land-surface elevation 880 feet above NGVD29
The depth of the well is 186 feet below land surface.
The depth of the hole is 186 feet below land surface.
This well is completed in the Silurian-Devonian aquifers (N400SLRDVN) national aquifer.
This well is completed in the Devonian-Silurian System (340DVSL) local aquifer.
Output formats
Table of data
Tab-separated data
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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
1936-04-14 D62610 820.00NGVD291OUSGSSP
1936-04-14 D62611 819.91NAVD881OUSGSSP
1936-04-14 D7201960.00  1OUSGSSP

Explanation
SectionCodeDescription
Water-level date-time accuracyDDate is accurate to the Day
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.
Measuring agencyUSGSU.S. Geological Survey
Source of measurementSMeasured by personnel of reporting agency.
Water-level approval statusPProvisional data subject to revision.