USGS Water-Year Summary 2023
371125089445301 Delta
Mississippi River Valley alluvial aquifer
Holocene Alluvium
LOCATION - Lat 37°11'26.1", long 89°44'52.5" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 SE 1/4 sec.08, T.29 N., R.12 E., Cape Girardeau County, MO, Hydrologic Unit 08020204,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 338.62 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 338 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 338.62 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.8 ft above land-surface datum, Oct. 10, 1956 to present.
PERIOD OF RECORD - November 1, 1956 to present
GAGE - As of November 1, 1956, water level measuring device is float and encoder. From April 26, 2000 to present, the water level recording device is a DCP with telemetry capability.
COOPERATION - All data furnished by Missouri Department of Natural Resources (MDNR); Record from November 1, 1956 to April 25, 2000 furnished from MDNR. Record from April 25, 2000 to present worked by USGS and MDNR.