USGS Water-Year Summary 2023
362718089552301 Gideon
Mississippi embayment aquifer system
McNairy Formation
LOCATION - Lat 36°27'18.4", long 89°55'22.9" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 SE 1/4 sec.13, T.21 N., R.10 E., New Madrid County, MO, Hydrologic Unit 08020204,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 270.00 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 272 ft NGVD29 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 270 ft above North American Vertical Datum of 1988. Measuring point: DNR DCP platform shelf, 2.5 ft above land-surface datum, Aug. 21, 1962 to present.
PERIOD OF RECORD - February 4, 2009 to present.
GAGE - From February 04, 2009 to present, DCP with telemetry capability as water level recording device and a vented, submersible pressure transducer as water level measuring device. These devices are setting in a metal gage house next to a turbine pump which sets over the well.
COOPERATION - From February 04, 2009 to present, water level data furnished by Missouri Department of Natural Resources (MDNR) and data processed by USGS and MDNR.