USGS Water-Year Summary 2021
Ozark Plateaus aquifer system
LOCATION - Lat 38°05'00.9", long 90°33'55.6" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SE 1/4 sec.22, T.39 N., R.4 E., Jefferson County, MO, Hydrologic Unit 07140101,
- The record from 08/13/2013 to 10/14/2014 was set back to working after previously being set to approved. Upon reviewing the record, the block correction of -0.30 ft was ended on 10/15/2014 as it was determined that the wrong MP had been utilized when trying to determine correction factors.
The following correction was removed. A prorated correction from zero to -0.30 ft. was applied to the period 08/13/2013 to 03/05/2014. then correction was continued to 08/14/2014 with a -0.35 ft. Gage was restarted late after WL was made on 10/15/2014 which needed a -0.30 ft. correction to smooth the hydrograph to the recorded water levels.
The following correction was added. A prorated correction of zero to +0.05 was applied to the period 08/13/2013 to 03/05/2014. The correction was continued as a block correction from 03/05/2014 to 10/14/2014. A prorated correction of +0.05 to zero was applied to the period 10/14/2014 to 08/24/2015.
DATUM - Land-surface datum is 790 ft above National Geodetic Vertical Datum of 1929. Measuring point: Undefined, distance above land-surface datum not defined, UNDEFINED BEGIN DATE to present; Undefined, 0.5 ft above land-surface datum, Nov. 18, 1960 to present.
PERIOD OF RECORD - November 20, 1960 to present.
GAGE - Stevens model A-35 chart recorder installed November 20, 1960. January 21, 2000 to April 10, 2007; DCP with float, encoder, and telemetry capability was installed as the water level recording and measuring devices. April 10, 2007 to April 17, 2012; DCP with telementry capability and vented, submersible pressure transducer. April 17, 2012 to present; DCP with telementry capability with a float and encoder.
COOPERATION - Data from November 20, 1960 to the present furnished by Missouri Department of Natural Resources (MDNR); Record from November 20, 1960 to January 21, 2000 furnished from MDNR. Record form January 21, 2000 to the present furnished by MDNR and USGS.