WELL -GW Data

Well Data

ARLINGTON COUNTY	385253077042301		Local number: 54V 3
LOCATION.--Lat 38`52'53", long 77`04'22", NAD83, Hydrologic Unit 02070010, at Arlington National Cemetery in Arlington. Owner: National Park Service, National Capitol Parks.
AQUIFER.--Terrace gravels of Holocene age and sand of Early Cretaceous age.
WELL CHARACTERISTICS.--Dug unused water well, diameter 48 in., depth 50 ft.
INSTRUMENTATION.--Occasional measurement with chalked tape by USGS personnel. Oct. 1, 1989 to Oct. 26, 1995, monthly measurement with chalked tape. Prior to Oct. 1, 1989, bimonthly measurement with chalked tape.
DATUM.--Elevation of land-surface datum is 205 ft above sea level, from topographic map. Measuring point: Top of brick and stone casing, 3.0 ft above land-surface datum.
REMARKS.--
PERIOD OF RECORD.--January 1958 to current year.

		Explanation of Hydrograph

BUCKINGHAM COUNTY	372608078404601		Local number: 41H 3
LOCATION.--Lat 37`26'08", long 78`40'46", Hydrologic Unit 02080207, 0.85 mi west of Ranger Headquarters on south side of dirt road off State Highway 636, 1.5 mi south of Sliders. Owner: U.S. Geological Survey.
AQUIFER.--Metagraywacke, quartzose schist, and melange of Cambrian age.
WELL CHARACTERISTICS.--Augered observation water well, diameter 3 in. to 49 ft, diameter 1.25 in. from 49 to 54 ft, depth 54 ft, screened 49 to 54 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. October 1974 to June 12, 1998, occasional measurement with chalked tape by USGS personnel. August 1970 to October 1974, digital recorder 60-minute punch. Prior to August 1970, occasional measurement with chalked tape.
DATUM.--Elevation of land-surface datum is 683.8 ft above sea level. Measuring point: Top of casing, 1.3 ft above land-surface datum.
REMARKS.--Prior to Oct. 1, 1981, well was reported as being located in Appomattox County.
PERIOD OF RECORD.--March 1970 to current year. Unpublished records available prior to October 1977 in files of the Geological Survey.
Real-time data
		Explanation of Hydrograph

CLARKE COUNTY	390348078035501		Local number: 46W175
LOCATION.--Lat 39`03'48", long 78`03'55", Hydrologic Unit 02070007, 1.5 mi east of the intersection of U.S. Highways 17/50 and 340 at Blandy Experimental Farm. Owner: University of Virginia.
AQUIFER.--Conococheague Limestone of Middle Cambrian age.
WELL CHARACTERISTICS.--Drilled unused water well, diameter 6 in., depth 80.4 ft, cased to 24 ft, open hole 24 to 80.4 ft.
INSTRUMENTATION.--Electronic data logger 15-minute record interval. Prior to February 28, 2000, digital recorder 60-minute punch.
DATUM.--Elevation of land-surface datum is 600 ft above sea level, from topographic map. Measuring point: Top of casing, 3.7 ft above land-surface datum.
REMARKS.--Missing record due to recorder malfunction.
PERIOD OF RECORD.--July 1987 to current year.
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		Explanation of Hydrograph

CITY OF COLONIAL HEIGHTS	371644077244601		Local number: 51G 1
LOCATION.--Lat 37`16'44", long 77`24'46", Hydrologic Unit 02080207, 200 ft west of U.S. Highways 1 and 301, 0.5 mi south of the intersection of State Highway 144 (Ashby Avenue) and U.S. Highways 1 and 301 (Boulevard) in Colonial Heights.
AQUIFER.--Petersburg Granite of Mississippian age.
WELL CHARACTERISTICS.--Drilled unused water well, diameter 6 in., depth 100 ft, cased to 50 ft, open hole 50 to 100 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Prior to July 24, 2006, occasional measurement with chalked tape by USGS personnel.
DATUM.--Elevation of land-surface datum is 57.30 ft above sea level. Measuring point: Top of casing, 1.0 ft above land-surface datum.
PERIOD OF RECORD.--October 1939 to current year.
Real-time data
		Explanation of Hydrograph

FAIRFAX COUNTY	385638077220101		Local number: 52V 2
LOCATION.--Lat 38`56'58", long 77`22'01", Hydrologic Unit 02070008, at U.S. Geological Survey National Center in Reston. Owner: U.S. Geological Survey.
AQUIFER.--Manassas Sandstone of Triassic age.
WELL CHARACTERISTICS.--Drilled observation water well, diameter 8 in., depth 205 ft, cased to 35 ft, open hole 35 to 205 ft.
INSTRUMENTATION.--Electronic data logger 15-minute record interval. Prior to Sept. 1, 1996, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 390 ft above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft above land-surface datum.
REMARKS.--Missing record due to recorder malfunction.
PERIOD OF RECORD.--October 1976 to current year.
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		Explanation of Hydrograph

LOUDOUN COUNTY	390623077314201		Local number: 50W 4C
LOCATION.--Lat 39`06'23", long 77`31'42", Hydrologic Unit 02070008, under water tower 500 ft east of State Highway 7, 0.75 mi east of Leesburg. Owner: Town of Leesburg.
AQUIFER.--Slightly metamorphosed Balls Bluff Formation of Late Triassic age.
WELL CHARACTERISTICS.--Drilled unused water well, diameter 6 in., depth 535 ft, cased to 6 ft, open hole 6 to 535 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Prior to July 25, 2006, occasional measurement with chalked tape by USGS personnel.
DATUM.--Elevation of land-surface datum is 400 ft above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft above land-surface datum.
PERIOD OF RECORD.--October 1977 to current year.
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		Explanation of Hydrograph

LOUDOUN COUNTY: VA DEQ	391542077423801		Local number: 49Y 1 SOW 022
LOCATION.--Lat 39`15'42", long 77`42'37", NAD83, Hydrologic Unit 02070008, 4.2 mi southeast of Harpers Ferry. Owner: American Telephone and Telegraph Company.
AQUIFER.--Bedrock of Precambrian or Cambrian age.
WELL CHARACTERISTICS.--Drilled unused water well, diameter 6.5 in., depth 516 ft, cased to 45 ft, open hole 45 to 516 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Oct. 1, 1996 to Dec. 3, 2003, occasional measurement with chalked tape by Virginia Department of Environmental Quality - Water Division personnel. Oct. 1, 1985, to Oct. 1, 1996, bimonthly measurement with chalked tape. Sep. 30, 1974, to Sep. 30, 1985, occasional measurement with chalked tape. Prior to Sep. 30, 1974, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 1,100 ft above sea level, from topographic map. Measuring point: Top of casing, at land-surface datum.
REMARKS.--Records provided by the Virginia Department of Environmental Quality - Water Division.
PERIOD OF RECORD.--August 1969 to current year.
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		Explanation of Hydrograph

MONTGOMERY COUNTY	370812080261901		Local number: 27F 2 SOW 019
LOCATION.--Lat 37`08'12", long 80`26'19", Hydrologic Unit 05050001, off entrance road to Round Meadow Country Club, 400 ft north of State Highway 661, and 0.5 mi west of Christiansburg. Owner: Town of Christiansburg.
AQUIFER.--Beekmantown Formation of Early Ordovician age.
WELL CHARACTERISTICS.--Drilled unused water well, diameter 10 in., depth 450 ft, length of casing unknown.
INSTRUMENTATION.--Electronic data logger and pressure transducer 5-minute record interval. Apr. 5, 1969 to Apr. 29, 2004, continuous strip-chart recorder. Prior to Apr. 5, 1969, one measurement with chalked tape by Virginia Department of Environmental Quality - Water Division personnel.
DATUM.--Elevation of land-surface datum is 1,970 ft above sea level, from topographic map. Measuring point: Top of casing, 1.5 ft below land-surface datum prior to May 1, 1990; 0.43 ft above land-surface datum thereafter.
REMARKS.--Records provided by the Virginia Department of Environmental Quality - Water Division. Lowest recorded water level, 7.39 ft, is a result of the Mexico earthquake of Sep. 19, 1985, but is not shown as the minimum of record since it is an earthquake affected measurement. Prior to May 1, 1990, brief periods when water flowed over top of casing. Missing record due to recorder malfunction.
PERIOD OF RECORD.--July 1953, April 1969 to current year. Unpublished record available July 1953 in files of the Virginia Department of Environmental Quality - Water Division.
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		Explanation of Hydrograph

PRINCE WILLIAM COUNTY: Thoroughfare Gap	38491077420301		Local number: 49U 1
LOCATION.--Lat 38`49'30", long 77`42'07", NAD83, Hydrologic Unit 02070010, 500 ft north of State Highway 55, 0.8 mi east of Thoroughfare Gap, and 3.7 mi west of Haymarket. Owner: Virginia Department of Transportation.
AQUIFER.--Waterfall Formation of Early Jurassic age.
WELL CHARACTERISTICS.--Drilled observation water well, diameter 7 in., depth 345 ft, cased to 20 ft, open hole 20 to 345 ft.
INSTRUMENTATION.--Occasional measurement with chalked tape by USGS personnel. Prior to February 1980, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 383 ft above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft above land-surface datum.
PERIOD OF RECORD.--October 1968 to current year. Unpublished records available prior to May 1969 in files of the Geological Survey.

		Explanation of Hydrograph

PRINCE WILLIAM COUNTY: South of Aldie	385607077381101		Local number: 49V 1
LOCATION.--Lat 38`56'07", long 77`38'10", NAD83, Hydrologic Unit 02070010, near intersection of State Highways 600 and 615, 2.8 mi south of Aldie.
AQUIFER.--Turkey Run Formation of Early Jurassic age.
WELL CHARACTERISTICS.--Drilled observation water well, diameter 7 in., depth 165 ft, cased to 10 ft, open hole 10 to 165 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Oct. 1, 1995 to Sept. 30, 2003, occasional measurements with chalked tape by USGS personnel. Jun. 19, 1979 to Oct. 1, 1995, digital recorder 60-minute punch. Prior to Jun. 19, 1979, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 420 ft above sea level, from topographic map. Measuring point: Top of casing, 1.0 ft above land-surface datum. Readings from 1979 to 1981 should be 0.7 ft lower than previously published.
PERIOD OF RECORD.--November 1968 to current year.
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		Explanation of Hydrograph

PRINCE WILLIAM COUNTY: Prince William Forest Park	38342307745901		Local number: 51S 7
LOCATION.--Lat 38`34'23", long 77`24'58", NAD83, Hydrologic Unit 02070011, in Prince William Forest Park, 700 ft north of State Highway 619, 0.7 mi southeast of Belfair Crossroads, and 4.6 mi south of Independent Hill. Owner: National Park Service.
AQUIFER.--Lunga Reservoir Formation of Cambrian age.
WELL CHARACTERISTICS.--Drilled observation water well, diameter 6 in., depth 490 ft, cased to 50 ft, open hole 50 to 490 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Feb. 1, 1996 to Dec.11, 2003, occasional measurement with chalked tape by USGS personnel. Dec. 21, 1982 to Feb. 1, 1996, digital recorder 60-minute punch. Prior to Dec. 21, 1982, occasional measurement with chalked tape.
DATUM.--Elevation of land-surface datum is 295 ft above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft above land-surface datum.
PERIOD OF RECORD.--September 1973 to November 1975, December 1977 to current year. Unpublished records available prior to December 1977 in files of the Geological Survey.
Real-time data
		Explanation of Hydrograph

ROCKINGHAM COUNTY	382150078424001		Local number: 41Q 1
LOCATION.--Lat 38`21'50", long 78`42'40", Hydrologic Unit 02070005, at Virginia Department of Transportation garage, 1.3 mi southeast of McGaheysville. Owner: U.S. Geological Survey.
AQUIFER.--Conococheague Formation of Late Cambrian age.
WELL CHARACTERISTICS.--Drilled observation water well, diameter 6.25 in., depth 310 ft, cased to 131 ft, open hole 131 to 310 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Oct. 1, 1995 to Sept. 30, 2003, occasional measurement with chalked tape by USGS personnel. Jun. 27, 1979 to Oct. 1, 1995, digital recorder 60-minute punch. Prior to Jun. 27, 1979, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 1,105 ft above sea level, from topographic map. Measuring point: Top of casing 2.4 ft above land-surface datum. Prior to Feb. 27, 1996, top edge of recorder shelf, 3.5 ft above land-surface datum.
PERIOD OF RECORD.--August 1970 to current year.
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		Explanation of Hydrograph

CITY OF SUFFOLK	363928076332901		Local number: 58B 13
LOCATION.--Lat 36`39'28", long 76`33'29", Hydrologic Unit 03010205, 700 ft east of State Highway 642, 4.0 mi south of Suffolk.
AQUIFER.--Columbia aquifer of Quaternary age.
WELL CHARACTERISTICS.--Dug unused water well, diameter 22 in., depth 15 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. May 29, 1999 to Mar.. 15, 2004, electronic data logger 60 minute record interval. Mar. 2, 1994 to May 28, 1999, digital recorder 60-minute punch. Sep. 20, 1993 to Mar. 2, 1994, occasional measurement with chalked tape by USGS personnel. Jan. 24, 1981, to Sep. 20, 1993, digital recorder 60-minute punch. Prior to Jan. 24, 1981, continuous strip-chart recorder.
DATUM.--Elevation of land-surface datum is 40 ft above sea level, from topographic map. Measuring point: Top of recorder shelf, 1.9 ft above land-surface datum.
REMARKS.--Missing record due to recorder malfunction.
PERIOD OF RECORD.--March 1975 to current year.
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		Explanation of Hydrograph

WESTMORELAND COUNTY	381132076551001		Local number: 55P 9
LOCATION.--Lat 38`11'32", long 76`55'10", Hydrologic Unit 02070011, at George Washington Birthplace National Monument, 500 ft east of park road, 0.6 mi north of the end of State Highway 204, and 3.4 mi southeast of Colonial Beach. Owner: National Park Service.
AQUIFER.--Columbia aquifer of Quaternary age.
WELL CHARACTERISTICS.--Dug unused water well, diameter 36 in., depth 22.6 ft.
INSTRUMENTATION.--Electronic data logger and pressure transducer 15-minute record interval. Prior to Dec. 15, 2003, occasional measurement with chalked tape by USGS personnel.
DATUM.--Elevation of land-surface datum is 17 ft above sea level, from topographic map. Measuring point: Top of concrete hatch on well casing, 2.25 ft above land-surface datum. Prior to Jul. 3, 1995, top of concrete lip on casing, 1.65 ft above land-surface datum.
PERIOD OF RECORD.--July 1977 to current year.
Real-time data
		Explanation of Hydrograph


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