USGS Water-Year Summary 2023

384455093201001 Dresden R-12 School

Ozark Plateaus aquifer system
Cotter-Jefferson City Dolomite

LOCATION - Lat 38°44'53.2", long 93°20'09.9" referenced to North American Datum of 1983, in NW 1/4 SE 1/4 SE 1/4 sec.21, T.46 N., R.22 W., Pettis County, MO, Hydrologic Unit 10300103,

REVISIONS HISTORY -
Revisions: Land-surface datum was updated to 833.27 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 835 ft NAVD88 from topographic map. Discrete water-level measurements prior to May 22, 2023, are referenced to the original datum.

The data from 08/17/2000 to 08/26/2009 was revised after it was previously set to 'Approved'. It was discovered that a measuring point height correction of 2.0 ft was needed for the period to reference water levels to land surface.

GROUNDWATER RECORDS

DATUM - Land-surface datum is 833.27 ft above North American Vertical Datum of 1988. Measuring point: unknown, 2.0 ft above land-surface datum, Jun. 1, 2000 to present.  

PERIOD OF RECORD - August 17, 2000 to present.

REMARKS -

Furnished record rated good (August 17, 2000 to August 28, 2009) based on 13 water level measurements made during this period to verify recorded water levels. Data from August 27, 2009 to August 29, 2010 is good based on 4 water level measurements during the period to verify the data. The record is accurate to +/-0.05 ft. The record from 08/30/2010 to 08/30/2011 is good based on 5 water level measurements during the period to verify the data. The record is accurate to +/-0.05 ft. The record from 08/30/2011 to 08/15/2012 is good based on 6 water level measurements during the period to verify the data. The record is accurate to +/-0.10 ft. Float and encoders are rarely subject to instrument drift and site visits indicated varying differences in the actual water level and the live reading. Due to this variance, the record can only be accurate to +/-0.10 ft. The record from 08/16/2012 to 04/30/2013 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The record from 05/01/2013 to 11/12/2014 is good based on 5 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The record from 11/13/2014 to 05/17/2016 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The record from 5/18/2016 to 11/28/2016 is good based on 2 water level measurements during the period to show that the recorded data is accurate to +/- 0.10 ft. The record from 11/29/2016 to 06/13/2017 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.10 ft.  The record from 06/14/2017 to 01/22/2018 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.10 ft.  The record from 01/23/2018 to 07/10/2018 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The record from 07/11/2018 to 02/12/2019 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.15 ft. The record from 02/13/2019 to 09/03/2019 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.10 ft. 

All further remarks can be found in RMS as of 09/04/2019.