USGS Water-Year Summary 2023
362955089581801 Malden
Mississippi River Valley alluvial aquifer
Holocene Alluvium
LOCATION - Lat 36°29'58.2", long 89°58'18.8" referenced to North American Datum of 1983, in sec.34, T.22 N., R.10 E., Dunklin County, MO, Hydrologic Unit 08020204,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 285.82 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 287 ft NGVD29 from a topographic map. Discrete water-level measurements prior to May 22, 2023, are referenced to the original datum.
GROUNDWATER RECORDS
DATUM - Land-surface datum is 285.82 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.5 ft above land-surface datum, Oct. 21, 1975 to present.
PERIOD OF RECORD - August 8, 1956 to present.
GAGE - Stevens model 7001 digital recorder installed August 8, 1956. May 4, 2000 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); Record from August 8, 1956 to May 4, 2000 furnished from MDNR.