USGS Water-Year Summary 2023

403055094364701 Sheridan

Sand and gravel aquifers (glaciated regions)
Drift

LOCATION - Lat 40°30'54.7", long 94°36'46.7" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 NW 1/4 sec.23, T.66 N., R.33 W., Worth County, MO, Hydrologic Unit 10240012,

REVISIONS HISTORY -
Revisions: Land-surface datum was revised to 1,048.86 ft NAVD88 on Oct. 4, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published in error as 1,055 ft NAVD88 from topographic map. Discrete water-level measurements referenced to NGVD29 and NAVD88 were revised, based on changes to the land-surface datum.

The data from 12/01/2004 to 10/04/2009 was revised after it was previously set to 'Approved'. It was discovered that a measuring point height correction of 1.8 ft was needed for the period but was not previously applied.

GROUNDWATER RECORDS

DATUM - Land-surface datum is 1,048.86 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.8 ft above land-surface datum, Nov. 3, 2004 to present.  

PERIOD OF RECORD - December 2, 2004 to present.

GAGE - December 2, 2004 to present; the water level recording device is a DCP with telemetry capability. December 2, 2004 to February 1, 2006; float and encoder is the water level measuring device. February 1, 2006 to present; a vented, submersible pressure transducer is the water level measuring device.

COOPERATION - December 2, 2004 to present, data furnished by Missouri Department of Natural Resources (MDNR). Record processed by the USGS and MDNR.

REMARKS - Data from 12/02/2004 to 09/30/2008 has been processed by the USGS with limited field water level measurements (9 measurements) during the period to verify the recorded water levels. This record is considered good except for period when the float was stuck, which have been removed. Data from 10/01/2008 to 10/05/2009 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. Record from 10/05/2009 to 04/21/2010 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.2 ft. Record from 04/21/2010 to 06/09/2011 is good based on 5 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.1 ft. Record from 06/09/2011 to 08/14/2012 is good based on 4 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. Record from 08/15/2012 to 11/05/2013 is good based on 4 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The rating is due largely in part to the drifting of the pressure transducer. Record from 11/06/2013 to 12/15/2014 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. Record from 12/16/2014 to 06/29/2016 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. Record from 06/30/2016 to 03/14/2017 is good based on 2 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 03/15/2017 to 04/16/2018 is good based on 2 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 04/17/2018 to 10/24/2018 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 10/25/2019 to 04/16/2019 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.05 ft. 

All further remarks can be found in RMS as of 07/15/2019.