USGS Water-Year Summary 2024
394430077225001 AD 808
Piedmont and Blue Ridge crystalline-rock aquifers
Metabasalt
LOCATION - Lat 39°44'29.8", long 77°22'50.1" referenced to North American Datum of 1983, Adams County, PA, Hydrologic Unit 02070009, Carroll Valley, Adams County.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 234 ft. Upper casing diameter 6 in; top of first opening 20 ft, bottom of last opening 234 ft. Drilled observation well, cased to 20 ft, open hole.
DATUM - Land-surface datum is 786 ft above North American Vertical Datum of 1988. Measuring point: top of platform; MODIFIED DATE FOR AQ MIGRATION; 11/06/2000, 0.95 ft above land-surface datum, Oct. 16, 1969 to Sep. 5, 2003; top of platform, 2.82 ft above land-surface datum, Sep. 5, 2003 to present. Elevation of land surface is from Lidar.
PERIOD OF RECORD - September 2003 to current year.
GAGE - Data collection platform with 15-minute recording interval since April 2023; prior, 60-minute recording interval. Satellite telemetry at station.
COOPERATION - Site maintained in cooperation with the Pennsylvania Department of Environmental Protection and the U.S. Geological Survey.
EXTREMES FOR PERIOD OF RECORD - The extremes are based on the instantaneous depth below land-surface datum. Highest water level, <35.2 ft below land-surface datum, May 7, 2022 (equipment malfunction prevented proper recording of data); lowest, 129.24 ft below land-surface datum, Nov 11, 2007.