USGS Water-Year Summary 2023
363442090364301 Naylor
Mississippi River Valley alluvial aquifer
Holocene Alluvium
LOCATION - Lat 36°34'45.2", long 90°36'46.6" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SE 1/4 sec.03, T.22 N., R.4 E., Ripley County, MO, Hydrologic Unit 11010008,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 302.19 ft NAVD88 on May 22, 2023, as determined by a GNSS survey by Missouri DNR. Land-surface datum was previously published as 303 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 302.19 ft above North American Vertical Datum of 1988. Measuring point: unknown, 3.4 ft above land-surface datum, Jul. 13, 1964 to present.
PERIOD OF RECORD - August 5, 1956 to present.
GAGE - Stevens model A-35 chart recorder installed August 5, 1956. Stevens model 7001 digital recorder installed August 8, 1988. September 20, 2000 to present; DCP with float, encoder, and telemetry capability were installed as the water level recording and measuring devices.
WATER-QUALITY RECORDS
DATUM - Land-surface datum is 302.19 ft above North American Vertical Datum of 1988. Measuring point: unknown, 3.4 ft above land-surface datum, Jul. 13, 1964 to present.
COOPERATION - Data furnished by Missouri Department of Natural Resources (MDNR); Record from August 5, 1956 to September 20, 2000 furnished from MDNR. Record from September 20, 2000 to present, processed by USGS and MDNR.