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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 =
  • 421704091465601
Minimum number of levels = 1
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USGS 421704091465601 086N08W04DCB 1910Walker 1 Old

Linn County, Iowa
Latitude  42°17'04", Longitude  91°46'56" NAD27
Land-surface elevation 901 feet above NGVD29
The depth of the well is 230 feet below land surface.
The depth of the hole is 230 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
1934-10-18 D62610 839.00NGVD291OUSGSSP
1934-10-18 D62611 838.90NAVD881OUSGSSP
1934-10-18 D7201962.00  1OUSGSSP
1944 Y62610 874.00NGVD291OUSGSSA
1944 Y62611 873.90NAVD881OUSGSSA
1944 Y7201927.00  1OUSGSSA

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.
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.