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Groundwater levels for the Nation

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USGS 420031091443301 2015USGS GPW1

Linn County, Iowa
Latitude  42°00'31.6", Longitude  91°44'33.7" NAD83
Land-surface elevation 721.58 feet above NAVD88
The depth of the well is 60 feet below land surface.
The depth of the hole is 61 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
2015-09-1420:11 UTCm62610 718.33NGVD291TUSGSSA
2015-09-1420:11 UTCm62611 718.24NAVD881TUSGSSA
2015-09-1420:11 UTCm720193.34  1TUSGSSA
2015-09-2217:15 UTCm62610 718.09NGVD291TUSGSSA
2015-09-2217:15 UTCm62611 718.00NAVD881TUSGSSA
2015-09-2217:15 UTCm720193.58  1TUSGSSA
2016-04-1914:17 UTCm62610 719.14NGVD291TUSGSSA
2016-04-1914:17 UTCm62611 719.05NAVD881TUSGSSA
2016-04-1914:17 UTCm720192.53  1TUSGSSA
2016-06-2816:28 UTCm62610 722.12NGVD291SUSGSSA
2016-06-2816:28 UTCm62611 722.03NAVD881SUSGSSA
2016-06-2816:28 UTCm72019-0.45  1SUSGSSA
2016-10-2716:39 UTCm62610 720.03NGVD291TUSGSSA
2016-10-2716:39 UTCm62611 719.94NAVD881TUSGSSA
2016-10-2716:39 UTCm720191.64  1TUSGSSA
2017-05-0217:20 UTCm62610 720.65NGVD291SUSGSSA
2017-05-0217:20 UTCm62611 720.56NAVD881SUSGSSA
2017-05-0217:20 UTCm720191.02  1SUSGSSA
2017-06-2015:00 UTCm62610 717.66NGVD291VUSGSSA
2017-06-2015:00 UTCm62611 717.57NAVD881VUSGSSA
2017-06-2015:00 UTCm720194.01  1VUSGSSA
2017-10-2615:04 UTCm62610 717.12NGVD291VUSGSSA
2017-10-2615:04 UTCm62611 717.03NAVD881VUSGSSA
2017-10-2615:04 UTCm720194.55  1VUSGSSA
2018-10-3015:20 UTCm62610 720.93NGVD291VUSGSSA
2018-10-3015:20 UTCm62611 720.84NAVD881VUSGSSA
2018-10-3015:20 UTCm720190.74  1VUSGSSA
2019-05-2214:16 UTCm62610 722.21NGVD291VUSGSSA
2019-05-2214:16 UTCm62611 722.12NAVD881VUSGSSA
2019-05-2214:16 UTCm72019-0.54  1VUSGSSA
2019-06-2016:00 UTCm62610 719.37NGVD291VUSGSSA
2019-06-2016:00 UTCm62611 719.28NAVD881VUSGSSA
2019-06-2016:00 UTCm720192.30  1VUSGSSA
2019-08-0814:44 UTCm62610 716.48NGVD291VUSGSSA
2019-08-0814:44 UTCm62611 716.39NAVD881VUSGSSA
2019-08-0814:44 UTCm720195.19  1VUSGSSA
2019-11-0717:23 UTCm62610 718.51NGVD291TUSGSSA
2019-11-0717:23 UTCm62611 718.42NAVD881TUSGSSA
2019-11-0717:23 UTCm720193.16  1TUSGSSA
2019-11-1819:01 UTCm62610 716.69NGVD291TUSGSSA
2019-11-1819:01 UTCm62611 716.60NAVD881TUSGSSA
2019-11-1819:01 UTCm720194.98  1TUSGSSA
2020-03-0217:22 UTCm62610 716.00NGVD291TUSGSSA
2020-03-0217:22 UTCm62611 715.91NAVD881TUSGSSA
2020-03-0217:22 UTCm720195.67  1TUSGSSA
2020-07-1016:55 UTCm62610 720.18NGVD291VUSGSSA
2020-07-1016:55 UTCm62611 720.09NAVD881VUSGSSA
2020-07-1016:55 UTCm720191.49  1VUSGSSA
2020-09-2515:51 UTCm62610 715.66NGVD291TUSGSSA
2020-09-2515:51 UTCm62611 715.57NAVD881TUSGSSA
2020-09-2515:51 UTCm720196.01  1TUSGSSA
2020-12-2117:28 UTCm62610 714.68NGVD291VUSGSSA
2020-12-2117:28 UTCm62611 714.59NAVD881VUSGSSA
2020-12-2117:28 UTCm720196.99  1VUSGSSA
2021-03-3013:11 UTCm62610 717.45NGVD291VUSGSSA
2021-03-3013:11 UTCm62611 717.36NAVD881VUSGSSA
2021-03-3013:11 UTCm720194.22  1VUSGSSA
2021-06-2319:45 UTCm62610 715.19NGVD291VUSGSSP
2021-06-2319:45 UTCm62611 715.10NAVD881VUSGSSP
2021-06-2319:45 UTCm720196.48  1VUSGSSP
2021-10-1416:56 UTCm62610 716.00NGVD291VUSGSSP
2021-10-1416:56 UTCm62611 715.91NAVD881VUSGSSP
2021-10-1416:56 UTCm720195.67  1VUSGSSP
2022-02-0117:27 UTCm62610 713.64NGVD291VUSGSSP
2022-02-0117:27 UTCm62611 713.55NAVD881VUSGSSP
2022-02-0117:27 UTCm720198.03  1VUSGSSP
2022-06-2717:45 UTCm62610 721.78NGVD291VUSGSSP
2022-06-2717:45 UTCm62611 721.69NAVD881VUSGSSP
2022-06-2717:45 UTCm72019-0.11  1VUSGSSP
2022-10-2015:40 UTCm62610 714.09NGVD291VUSGSSP
2022-10-2015:40 UTCm62611 714.00NAVD881VUSGSSP
2022-10-2015:40 UTCm720197.58  1VUSGSSP
2022-12-1916:59 UTCm62610 714.94NGVD291VUSGSSP
2022-12-1916:59 UTCm62611 714.85NAVD881VUSGSSP
2022-12-1916:59 UTCm720196.73  1VUSGSSP
2022-12-2218:53 UTCm62610 714.84NGVD291VUSGSSP
2022-12-2218:53 UTCm62611 714.75NAVD881VUSGSSP
2022-12-2218:53 UTCm720196.83  1VUSGSSP
2023-02-0819:03 UTCm62610 715.34NGVD291VUSGSSP
2023-02-0819:03 UTCm62611 715.25NAVD881VUSGSSP
2023-02-0819:03 UTCm720196.33  1VUSGSSP
2023-03-1517:42 UTCm62610 719.29NGVD291VUSGSSP
2023-03-1517:42 UTCm62611 719.20NAVD881VUSGSSP
2023-03-1517:42 UTCm720192.38  1VUSGSSP
2023-06-1317:16 UTCm62610 715.49NGVD291VUSGSSP
2023-06-1317:16 UTCm62611 715.40NAVD881VUSGSSP
2023-06-1317:16 UTCm720196.18  1VUSGSSP
2023-07-1315:04 UTCm62610 714.84NGVD291VUSGSSP
2023-07-1315:04 UTCm62611 714.75NAVD881VUSGSSP
2023-07-1315:04 UTCm720196.83  1VUSGSSP
2023-07-1815:48 UTCm62610 715.02NGVD291VUSGSSP
2023-07-1815:48 UTCm62611 714.93NAVD881VUSGSSP
2023-07-1815:48 UTCm720196.65  1VUSGSSP
2023-09-2617:27 UTCm62610 717.92NGVD291VUSGSSP
2023-09-2617:27 UTCm62611 717.83NAVD881VUSGSSP
2023-09-2617:27 UTCm720193.75  1VUSGSSP
2023-12-1117:38 UTCm62610 713.07NGVD291VUSGSSP
2023-12-1117:38 UTCm62611 712.98NAVD881VUSGSSP
2023-12-1117:38 UTCm720198.60  1VUSGSSP
2024-03-2519:41 UTCm62610 712.26NGVD291VUSGSSP
2024-03-2519:41 UTCm62611 712.17NAVD881VUSGSSP
2024-03-2519:41 UTCm720199.41  1VUSGSSP
2024-06-1812:17 UTCm62610 719.06NGVD291VUSGSSP
2024-06-1812:17 UTCm62611 718.97NAVD881VUSGSSP
2024-06-1812:17 UTCm720192.61  1VUSGSSP

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.