USGS Water-Year Summary for Site 401057091494501

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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

401057091494501 Deer Ridge Wildlife Area

Mississippian aquifers
Mississippian System

LOCATION - Lat 40°11'00.1", long 91°49'47.2" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SW 1/4 sec.07, T.62 N., R.8 W., Lewis County, MO, Hydrologic Unit 07110002,

REVISIONS HISTORY - Revisions: Land-surface datum was revised to 700.86 ft NAVD88 on Oct. 4, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published in error as 685 ft NGVD29 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 700.86 ft above North American Vertical Datum of 1988. Measuring point: Measured from east side of well house; ground slopes; height is about 1.4 ft on west side, 0.1 ft above land-surface datum, Apr. 1, 2009 to Oct. 1, 2020; Measured from east side of well house; ground slopes; height is about 1.4 ft on west side, 1.4 ft above land-surface datum, Oct. 1, 2020 to present.

PERIOD OF RECORD - From April 01, 2009 to present.

COOPERATION - From April 01, 2009 to present, data is furnished by the Missouri Department of Natural Resources (MDNR) and is processed by USGS and MDNR.

REMARKS -

Data from April 01, 2009 to June 29, 2010 is good based on 6 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.1 ft. The float has a tendency to stick in this well, however when it becomes free the data jumps are usually less than 0.1 ft. These periods when the float sticks have not been deleted because of the high occrrance frequency and small magnitude of the water level change when the float is freed. It is probable that some of the resets were necessary and the float may have been sticking at the time the encoder was read. Data from June 29, 2010 to June 26, 2011 is good based on 2 water level measurments made during the period to verify the recorded data and is accurate to +/- 0.1 ft. The float has a tendency to stick in this well, however when it becomes free the data jumps are usually less than 0.1 ft. These periods when the float sticks have not been deleted because it occurs at a high frequency and the water level change is of small magnitude when the float is freed. It is probable that some of the resets were necessary and the float may have been sticking at the time the encoder was read. Because of missing data, no corrections were made to water levels during this period. This is assuming that the Sutron was reset properly at each site visit. The record from 06/27/2011 to 07/31/2012 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 07/31/2012 to 10/29/2013 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 float during this period would stick regularly but would free itself soon after. The float freed itself, the jumps would be usually less than 0.1 ft. The record from 10/30/2013 to 01/21/2015 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 01/22/2015 to 08/02/2016 is good based on 3 water level measurements made during the period to verify the recorded data and is accurate to +/- 0.05 ft. The record from 08/03/2016 to 02/15/2017 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 02/16/2017 to 08/14/2017 is good based on 1 water level measurement made during the period to verify the recorded data is accurate to +/- 0.04 ft. The record from 08/15/2017 to 04/24/2018 is good based on 1 water level measurement made during the period to verify the recorded data is accurate to +/- 0.03 ft. The record from 04/25/2018 to 09/04/2018 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 09/05/2018 to 04/24/2019 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 04/25/2019 to 09/23/2019 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 later correction notes and remarks can be found in RMS as of 09/24/2019.