USGS Water-Year Summary for Site 402627095220601

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	Available Parameters
	72019 Water level, depth LSD(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

402627095220601 Tarkio Alluvial Aquifer

Alluvial aquifers

LOCATION - Lat 40°26'27", long 95°22'06" referenced to North American Datum of 1983, Atchison County, MO, Hydrologic Unit 10240005,

REVISIONS HISTORY - Revisions: Land-surface datum was revised to 927.34 ft NAVD88 on Oct. 4, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published in error as 908 ft NAVD88 from topographic map. Discrete water-level measurements referenced to NGVD29 and NAVD88 were revised, based on changes to the land-surface datum.

GROUNDWATER RECORDS

DATUM - Land-surface datum is 927.34 ft above North American Vertical Datum of 1988. Measuring point: Transfer MP created for migration, 0 ft above land-surface datum, Apr. 13, 2016 to Jul. 16, 2020; Transfer MP created for migration, 10.0 ft above land-surface datum, Jul. 16, 2020 to present.

PERIOD OF RECORD - April 13, 2016 to present. Gage was installed on April 12, 2016.

COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR) and records processed by USGS and MDNR.

REMARKS -

The record from 04/13/2016 to 08/22/2017 is fair based on 5 water level measurements made during the period and is accurate to +/- 0.05 ft. The fair rating is due to a gap in data during August of 2016.

The record from 08/23/2017 to 04/17/2018 is good based on 1 water level measurement made during the period and is accurate to +/- 0.05 ft.

The record from 04/18/2018 to 12/25/2018 is good based on 1 water level measurement made during the period and is accurate to +/- 0.05 ft.

The record from 12/26/2018 to 04/16/2019 is good based on 1 water level measurement made during the period and is accurate to +/- 0.05 ft.

The record from 04/17/2019 to 09/16/2019 is good based on 1 water level measurement made during the period and is accurate to +/- 0.05 ft.

All further remarks can be found in RMS as of 09/17/2019.