USGS Water-Year Summary for Site 384737090372001

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	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

384737090372001 St. Peters

Cambrian-Ordovician aquifer system
Champlainian Series

LOCATION - Lat 38°47'36.6", long 90°37'19.8" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 sec.31, T.47 N., R.4 E., St. Charles County, MO, Hydrologic Unit 07110009,

REVISIONS HISTORY - Revisions: Land-surface datum was updated to 500.34 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 500 ft NAVD88 from topographic map. Discrete water-level measurements prior to May 22, 2023, are referenced to the original datum.

GROUNDWATER RECORDS

DATUM - Land-surface datum is 500.34 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.3 ft above land-surface datum, Jun. 1, 1962 to present.

PERIOD OF RECORD - June 3, 2008 to present.

GAGE - June 3, 2008 to present; DCP with float, encoder, and telemetry capability were installed as the water level recording and measuring devices.

COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR).

REMARKS - Data from June 3, 2008 to March 25, 2010 is good based on 8 water level measurements made during this period to verify recorded water levels. The record is accurate to +/- 0.05 ft. The record from 03/25/2010 to 08/19/2010 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 08/19/2010 to 07/13/2011 is good based on 4 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 07/13/2011 to 08/15/2012 is good based on 4 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 08/15/2012 to 07/15/2013 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 07/16/2013 to 12/21/2014 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 12/22/2014 to 07/12/2016 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 07/13/2016 to 01/24/2017 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 01/25/2017 to 01/30/2018 is good based on 2 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.10 ft. The record from 01/31/2018 to 08/21/2018 is good based on 1 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 08/22/2018 to 03/24/2019 is good based on 1 water level measurement made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 03/25/2019 to 09/10/2019 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 09/11/2019.