USGS Water-Year Summary 2023
372958094161001 Lamar
Ozark Plateaus aquifer system
Gasconade Dolomite
LOCATION - Lat 37°29'59.4", long 94°16'10.0" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 NE 1/4 sec.30, T.32 N., R.30 W., Barton County, MO, Hydrologic Unit 11070207,
REVISIONS HISTORY -
The record from 06/03/2009 to 08/17/2009 has been modified by -0.08 ft after it was previously approved.
Revisions: Land-surface datum was updated to 975.92 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 975 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 975.92 ft above North American Vertical Datum of 1988. Measuring point: unknown, 2.3 ft above land-surface datum, Apr. 1, 1954 to present.
PERIOD OF RECORD - June 18, 1968 to present
GAGE - From June 18, 1968 to September 30, 1997, the water level recording device was an A-35 strip chart. April 13, 2001 to present; the water level recording device is a DCP with telemetry capability. The water level measuring device is a float and encoder.
COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR); Record from June 18, 1968 to April 13, 2001 furnished from MDNR. Record from April 13, 2001 to present processed by USGS and MDNR.