PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 38°32'36.8", long 76°35'40.8", Hydrologic Unit 02060006, near Prince Frederick. WELL CHARACTERISTICS.--Depth 570 ft. Upper casing diameter 4 in; top of first opening 560 ft, bottom of last opening 570 ft. Drilled, observation, artesian well. GAGE.--Water-level measurements by U.S. Geological Survey or Maryland Geological Survey personnel. Equipped with digital water-level recorder, Feb. 12, 2004 to current year. U.S. Geological Survey satellite data-collection platform at well. DATUM.--Land-surface datum is 140.4 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of recorder shelter platform, 4.33 ft above land-surface datum, Nov. 19, 2003, to present. PERIOD OF RECORD.--July 1979 to current year. EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 8.14 ft below sea level (148.54 ft below land surface), July 31, 1979; lowest measured, 77.97 ft below sea level (218.37 ft below land surface), August 25, 26, 2012 (recorder). REMARKS.--Maryland Groundwater-Level Monitoring Network observation well. Water levels are affected by regional groundwater withdrawal. COOPERATION.--Funding for the operation of this station is provided by the Calvert County Department of Public Works, the Maryland Geological Survey and the U. S. Geological Survey.Notice:
Water-level values for this site are now being published using the datum reference feet below land surface.
In order to convert the published values to a level in feet related to sea level, subtract the land surface values from the altitude of land surface, 140.40 (ft NGVD29).
The hydrograph below displays both feet below land surface and sea level scales on the dual Y-axes.
Summary of all available data for this site
Instantaneous-data availability statement
