USGS Water-Year Summary 2023
381217091104501 Sullivan
Ozark Plateaus aquifer system
Eminence-Potosi Dolomites
LOCATION - Lat 38°12'16.9", long 91°10'46.0" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 NW 1/4 sec.17, T.40 N., R.2 W., Franklin County, MO, Hydrologic Unit 07140103,
REVISIONS HISTORY -
Revisions: Land-surface datum was updated to 989.08 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 985 ft NAVD88 from topographic map. Discrete water-level measurements prior to May 22, 2023, are referenced to the original datum.
On 10/06/2010, data from 01/28/2008 to 06/09//2008 was revised by +0.05 ft after being previously approved.
GROUNDWATER RECORDS
DATUM - Land-surface datum is 989.08 ft above North American Vertical Datum of 1988. Measuring point: DNR DCP platform shelf, 1.3 ft above land-surface datum, Jan. 1, 1962 to present.
PERIOD OF RECORD - March 13, 2007 to present.
GAGE - March 13, 2007 to present; DCP with telemetry capability, and float and encoder installed as the water level recording and measuring devices.
COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR). Data processed by USGS and MDNR.