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Groundwater levels for the Nation

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USGS 420026091423001 2015USGS GPW3

Linn County, Iowa
Latitude  42°00'26.00", Longitude  91°42'30.60" NAD83
Land-surface elevation 721 feet above NAVD88
The depth of the well is 24.0 feet below land surface.
The depth of the hole is 24.0 feet below land surface.
This well is completed in the Sand and gravel aquifers (glaciated regions) (N100GLCIAL) national aquifer.
This well is completed in the Holocene Alluvium (111ALVM) local aquifer.
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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
2015-09-1520:05 UTCm62610 715.77NGVD291TUSGSSA
2015-09-1520:05 UTCm62611 715.68NAVD881TUSGSSA
2015-09-1520:05 UTCm720195.32  1TUSGSSA
2015-09-2219:10 UTCm62610 716.10NGVD291TUSGSSA
2015-09-2219:10 UTCm62611 716.01NAVD881TUSGSSA
2015-09-2219:10 UTCm720194.99  1TUSGSSA
2016-04-1915:38 UTCm62610 716.81NGVD291TUSGSSA
2016-04-1915:38 UTCm62611 716.72NAVD881TUSGSSA
2016-04-1915:38 UTCm720194.28  1TUSGSSA
2016-06-2817:03 UTCm62610 718.01NGVD291TUSGSSA
2016-06-2817:03 UTCm62611 717.92NAVD881TUSGSSA
2016-06-2817:03 UTCm720193.08  1TUSGSSA
2016-10-2717:34 UTCm62610 716.73NGVD291TUSGSSA
2016-10-2717:34 UTCm62611 716.64NAVD881TUSGSSA
2016-10-2717:34 UTCm720194.36  1TUSGSSA
2017-05-0218:12 UTCm62610 717.45NGVD291SUSGSSA
2017-05-0218:12 UTCm62611 717.36NAVD881SUSGSSA
2017-05-0218:12 UTCm720193.64  1SUSGSSA
2017-06-1920:30 UTCm62610 716.53NGVD291VUSGSSA
2017-06-1920:30 UTCm62611 716.44NAVD881VUSGSSA
2017-06-1920:30 UTCm720194.56  1VUSGSSA
2017-10-2617:38 UTCm62610 715.60NGVD291VUSGSSA
2017-10-2617:38 UTCm62611 715.51NAVD881VUSGSSA
2017-10-2617:38 UTCm720195.49  1VUSGSSA
2018-10-3016:30 UTCm62610 717.22NGVD291VUSGSSA
2018-10-3016:30 UTCm62611 717.13NAVD881VUSGSSA
2018-10-3016:30 UTCm720193.87  1VUSGSSA
2019-05-2215:42 UTCm62610 717.98NGVD291VUSGSSA
2019-05-2215:42 UTCm62611 717.89NAVD881VUSGSSA
2019-05-2215:42 UTCm720193.11  1VUSGSSA
2020-03-0217:58 UTCm62610 715.96NGVD291TUSGSSP
2020-03-0217:58 UTCm62611 715.87NAVD881TUSGSSP
2020-03-0217:58 UTCm720195.13  1TUSGSSP
2021-06-1020:50 UTCm62610 714.78NGVD291TUSGSSP
2021-06-1020:50 UTCm62611 714.69NAVD881TUSGSSP
2021-06-1020:50 UTCm720196.31  1TUSGSSP

Explanation
SectionCodeDescription
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 measurementSSteel-tape measurement.
Method of measurementTElectric-tape measurement.
Method of measurementVCalibrated electric-tape measurement.
Measuring agencyUSGSU.S. Geological Survey
Source of measurementSMeasured by personnel of reporting agency.
Water-level approval statusAApproved for publication -- Processing and review completed.
Water-level approval statusPProvisional data subject to revision.