USGS Water-Year Summary 2024
391320075463201 AND-IR-W-5D
Northern Atlantic Coastal Plain aquifer system
Columbia Group
LOCATION - Lat 39°13'20.5", long 75°46'32.0" referenced to North American Datum of 1983, Queen Anne's County, MD, Hydrologic Unit 02060002, Andover Branch.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 22 ft. Upper casing diameter 2 in; top of first opening 19 ft, bottom of last opening 22 ft. Drilled observation well.
DATUM - Land-surface datum is 56 ft above North American Vertical Datum of 1988. Measuring point: Mid point of stainless screw, 1.90 ft above land-surface datum, June 16, 2014, to present. Center of stainless steel bolt, installed in 2-inch PVC, 1.90 ft above land surface.
PERIOD OF RECORD - January 9, 2014 to current year.
GAGE -
Water Years 2014-2016: Records satisfactory to good.
Water-level measurements by U.S. Geological Survey personnel. Equipped with water-level data logger -- 15-minute recording interval, June 2014 to current year. Missing record due to recorder malfunction and equipment removal during crop growing season.
EXTREMES FOR PERIOD OF RECORD - Highest water level measured, 8.99 ft below land surface, March 26, 2015 (recorder); lowest water level measured, 12.90 ft below land surface, October 21 and 22, 2014 (recorder).