USGS Water-Year Summary 2023
373559090082901 National Lead
Ozark Plateaus aquifer system
Cambrian System
LOCATION - Lat 37°35'57.4", long 90°08'30.4" referenced to North American Datum of 1983, in NW 1/4 SE 1/4 SW 1/4 sec.34, T.34 N., R.8 E., Perry County, MO, Hydrologic Unit 07140107,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 984.52 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 992 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 984.52 ft above North American Vertical Datum of 1988. Measuring point: unknown, 1.4 ft above land-surface datum, Nov. 26, 1980 to present.
PERIOD OF RECORD - July 22, 1960 to present.
GAGE - Stevens model A-35 chart recorder installed July 18, 1960. Stevens model 7001 digital recorder installed September 29, 1988. June 9, 2000 to present; DCP with float, encoder, and telemetry capability installed as the water level recording and measuring devices.
COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR); Record from July 18, 1960 to June 9, 2000 furnished from MDNR. Record from June 10, 2000 to present, processed by USGS and MDNR.