USGS Water-Year Summary 2021
382549076260101 CA Ed 52
Northern Atlantic Coastal Plain aquifer system
LOCATION - Lat 38°25'59.7", long 76°26'13.0" referenced to North American Datum of 1983, Calvert County, MD, Hydrologic Unit 02060004, Rt 2 & 4, 4.3 mi. southeast of St. Leonard.
WELL CHARACTERISTICS - Depth 590 ft. Upper casing diameter 4.5 in; top of first opening 565 ft, bottom of last opening 580 ft. Drilled, observation, artesian well.
DATUM - Land-surface datum is 9.92 ft above North American Vertical Datum of 1988. Measuring point: Top of recorder platform, 1.4 ft above land-surface datum, Apr. 27, 1995 to Nov. 6, 2017; Leveled using GPS on 11/06/18 alt of LS was 10 feet using topo, now 9.92, 1.2 ft above land-surface datum, Nov. 6, 2017 to Nov. 6, 2017; leveled using GPS on 11/6/18 alt of LS was 10 ft. using Topo, now 9.92, 1.20 ft above land-surface datum, Nov. 7, 2017 to present.
PERIOD OF RECORD - April 1995 to current year.
GAGE - Water Year 2019-2020: Records good;
Water Year 2018: Records fair;
Water Year 2017: Records fair; missing data due to equipment malfunction.
Water Years 2014-2016: Records good.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.
Water-level measurements by U.S. Geological Survey personnel. Equipped with digital water-level recorder--15-minute recorder interval from April 1995 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 80.66 feet below land surface, May 21, 1995 (recorder); lowest measured, 133.24 feet below land surface, September 19, 2018 (recorder).