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Conditions as of June 30, 2007

LOCAL NUMBER WELL DEPTH AQUIFER PERIOD OF RECORD

49U 1

345 ft

Waterfall Formation of Early Jurassic age

from October, 1968

49V 1

165 ft

Turkey Run Formation of Early Jurassic age

from November, 1968

49Y 1 SOW 022

516 ft

Bedrock of Precambrian or Cambrian age

from September, 1969

50W 4C

535 ft

Slightly metamorphosed Balls Bluff Formation of Late Triassic age

from October, 1977

51S 7

490 ft

Lunga Reservoir Formation of Cambrian age

from September 1973 to November 1975, December 1977 to current year

52V 2D

205 ft

Manassas Sandstone of Triassic age

from October, 1976

54V 3

50 ft

Terrace gravels of Holocene age and sand of Early Cretaceous age

from January, 1958

FR Af 27

365 ft

Gettysburg Shale of Upper Triassic age

from April, 1982

FR Bd 96

189 ft

Catoctin Metabasalt of Precambrian age

from April, 1982

FR Cg 1

42.5 ft

Ijamsville Formation of Paleozoic age

from July, 1946

FR Df 35

302 ft

Sams Creek Metabasalt of Paleozoic age

from May, 1982

MO Cb 26

885 ft

Manassas Sandstone, Poolesville Member of Upper Triassic age

from February, 1991

MO Cc 14

46 ft

Ijamsville Formation of Paleozoic age

from November, 1952

MO Ec 10

855 ft

Balls Bluff Siltstone of Upper Triassic age

from September 1990

MO Eh 20

102.9 ft

Loch Raven Formation of Cambrian Age

from March, 1955

PG Bc 16

27.4 ft

Patuxent Formation of Lower Cretaceous age

from September, 1962

49U1

WELL NUMBER

49U1

SITE ID

384931077420301

LOCATION

Lat 38°49´30", long 77°42´08", Hydrologic Unit 02070010, 500 ft. north of State Highway 55, 0.8 mi. east of Thoroughfare Gap

AQUIFER

Waterfall Formation of Early Jurassic age

INSTRUMENTATION

Occasional measurement with chalked tape by USGS personnel. Prior to February 1980, continuous strip-chart recorder

CHARACTERISTICS

Drilled observation water well, diameter 7 in., depth 345 ft., cased to 20 ft., open hole 20 to 345 ft.

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

REMARKS

PERIOD OF RECORD

October 1968 to current year

EXTREMES FOR RECORD

Highest water level recorded, 2.59 ft. below land-surface datum, March 19, 1975; lowest measured, 10.33 ft. below land-surface datum, Oct. 14, 1988

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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49V1

WELL NUMBER

49V 1

SITE ID

385607077381101

LOCATION

Lat 38°56´07", long 77°38´11", Hydrologic Unit 02070010, near intersection of State Highways 600 and 615, 2.8 miles south of Aldie

AQUIFER

Turkey Run Formation of Early Jurassic age

INSTRUMENTATION

Occasional measurement with chalked tape by USGS personnel. June 19, 1979 to Oct. 1, 1995, digital recorder 60-minute punch.

CHARACTERISTICS

Drilled observation water well, diameter 7 in., depth 165 ft., cased to 10 ft., open hole 10 to 165 ft.

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

REMARKS

PERIOD OF RECORD

November 1968 to current year

EXTREMES FOR RECORD

Highest water level recorded, 6.85 ft. below land-surface datum, October 12, 1979; lowest measured, 13.09 ft. below land-surface datum, Sep. 16, 1991

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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49Y 1 SOW 022

WELL NUMBER

49Y 1 SOW 022

SITE ID

391542077423801

LOCATION

Lat 39°15´42", long 77°42´38", Hydrologic Unit 02070008, 4.2 miles southeast of Harpers Ferry.

AQUIFER

Bedrock of Precambrian or Cambrian age

INSTRUMENTATION

Occasional measurement with chalked tape by Virginia Department of Environmental Quality - Water Division personnel. October 1, 1985 to Oct. 1, 1996, bimonthly measuremment with chalked tape.

CHARACTERISTICS

Drilled unused water well, diameter 6.5 in., depth 516 ft., cased to 45 ft., open hole 45 to 516 ft.

DATUM

Elevation of land-surface datum is 1100 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

September 1969 to current year

EXTREMES FOR RECORD

Highest water level recorded, 48 ft. below land-surface datum, June 22, 1972; lowest measured, 61.80 ft. below land-surface datum, Dec. 2, 1992

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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50W 4C

WELL NUMBER

50W 4C

SITE ID

390623077314201

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

AQUIFER

Slightly metamorphosed Balls Bluff Formation of the Late Triassic age

INSTRUMENTATION

Monthly measurement with chalked tape by USGS personnel

CHARACTERISTICS

Drilled unused water well, diameter 6 in., depth 535 ft., cased to 6 ft., open hole 6 to 535 ft.

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

REMARKS

PERIOD OF RECORD

October 1977 to current year

EXTREMES FOR RECORD

Highest water level recorded, 28.13 ft. below land-surface datum, April 3, 1997; lowest measured, 49.06 ft. below land-surface datum, Nov. 27, 1985

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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51S 7

WELL NUMBER

51S 7

SITE ID

383423077245901

LOCATION

Lat 38°34´23", long 77°24´59", Hydrologic Unit 02070011, in Prince William Forest Park

AQUIFER

Lunga Reservoir Formation of Cambrian age

INSTRUMENTATION

Occasional measurement with chalked tape by USGS personnel

CHARACTERISTICS

Drilled observation water well, diameter 6 in., depth 490 ft., cased to 50 ft., open hole 50 to 490 ft.

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

REMARKS

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

EXTREMES FOR RECORD

Highest water level recorded, 1.00 ft. above land-surface datum, March 29, 1994; lowest measured, 12.95 ft. below land-surface datum, Nov. 16,17, 1988

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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52V 2D

WELL NUMBER

52V 2D

SITE ID

385638077220101

LOCATION

Lat 38°56´58", long 77°22´01", Hydrologic Unit 02070008, at USGS National Center in Reston

AQUIFER

Manassas Sandstone of Triassic age

INSTRUMENTATION

Satellite data collection platform 15-minute record interval

CHARACTERISTICS

Drilled observation water well, diameter 8 in., depth 205 ft., cased to 35 ft., open hole 35 to 205 ft.

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

PERIOD OF RECORD

October 1976 to current year

EXTREMES FOR RECORD

Highest water level recorded, 6.47 ft. below land-surface datum, March 30, 1984; lowest measured, 24.92 ft. below land-surface datum, Dec. 7-8, 1998

COOPERATORS

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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54V 3

WELL NUMBER

54V 3

SITE ID

385253077042301

LOCATION

Lat 38°52´53", long 77°04´23", Hydrologic Unit 02070010, at Arlington National Cemetery in Arlington , VA

AQUIFER

Terrace gravels of Holocene age and sand of Early Cretaceous age

INSTRUMENTATION

Occasional measurement with chalked tape by USGS personnel

CHARACTERISTICS

Dug unused water well, diameter 48 in., depth 50 ft.

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

EXTREMES FOR RECORD

Highest water level recorded, 40.34 ft. below land-surface datum,June 26, 1978; lowest measured, 45.28 ft. below land-surface datum, Nov. 28, 1988

COOPERATORS

Virginia Department of Environmental Quality - Water Division

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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FR Af 27

WELL NUMBER

FR Af 27

SITE ID

394200077190701

LOCATION

Lat 39°42'00", long 77°19'07", Hydrologic Unit 02070009, 0.3 mi southwest of U.S. Rt. 15 and MD Rt. 140, Emmitsburg

AQUIFER

Gettysburg Shale of Upper Triassic age.

INSTRUMENTATION

Monthly measurements with chalked steel tape by U.S. Geological Survey personnel

CHARACTERISTICS

Drilled, observation, artesian well, depth 365 ft; casing diameter 6 in., to 41 ft; open hole

DATUM

Elevation of land surface is 385 ft above sea level, from topographic map. Measuring point: Top of casing, 0.81 ft above land surface

REMARKS

Maryland Water-Level Network observation well

PERIOD OF RECORD

April 1982 to current year

EXTREMES FOR RECORD

Highest water level measured, 0.69 ft above land surface, July 31, 1996;
lowest measured, 5.90 ft below land surface, July 16, 1999, and Aug. 12, 1999

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well
NOTE: October 2002 to current data are provisional and subject to change

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FR Bd 96

Real-Time Data (current conditions)

WELL NUMBER

BA Ea 18

SITE ID

392045076512501

LOCATION

Lat 39°20´45", long 76°51´25", Hydrologic Unit 02060003, at Granite
Owner: Maryland National Guard (U.S. Army).

AQUIFER

Woodstock Granite of Paleozoic age.
Aquifer code: 300WDCK.

INSTRUMENTATION

Monthly measurements with electric tape by
U.S. Geological Survey personnel.

CHARACTERISTICS

Drilled, unused, water-table well,
depth 250 ft; casing diameter 10 in., to 50.7 ft;
casing diameter 6 in. with depth to 71.3 ft; open hole.

DATUM

Altitude of land surface is 491 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of casing, 1.5 ft above land surface.

REMARKS

Maryland Water-Level Network observation well.

PERIOD OF RECORD

March 1956 to current year.

EXTREMES FOR RECORD

Highest water level measured, 13.94 ft below land surface, June 24, 1972; lowest measured, 27.57 ft below land surface, September 13, 1966.

COOPERATORS

Maryland Geological Survey

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FR Cg 1

WELL NUMBER

FR Cg 1

SITE ID

393156077135701

LOCATION

Lat 39°31'56", long 77°13'57", Hydrologic Unit 02070009, at Johnsville

AQUIFER

Ijamsville Formation of Paleozoic age.

INSTRUMENTATION

Monthly measurements with chalked steel tape by U.S. Geological Survey personnel

CHARACTERISTICS

Dug, stone-lined, domestic, water-table well, depth 42.5 ft; diameter 36 in.

DATUM

Elevation of land surface is 600 ft above sea level, from topographic map - measuring point: Top of wooden well cover, 0.60 ft above land surface

REMARKS

Maryland Water-Level Network observation well

PERIOD OF RECORD

July 1946 to current year

EXTREMES FOR RECORD

Highest water level measured, 28.63 ft below land surface, Sept. 29, 1975;
lowest measured, 42.02 ft below land surface, Oct. 5, 1982

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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FR Df 35

WELL NUMBER

FR Df 35

SITE ID

392517077190401

LOCATION

Lat 39°25'17", long 77°19'04", Hydrologic Unit 02070009, north of Eaglehead Drive, near Lake Linganore

AQUIFER

Sams Creek Metabasalt of Paleozoic age

INSTRUMENTATION

Monthly measurements with chalked steel tape by U.S. Geological Survey personnel

CHARACTERISTICS

Drilled, unused, water-table well, depth 302 ft, casing diameter 6 in., to 26 ft, open hole

DATUM

Elevation of land surface is 570 ft above sea level, from topographic map - measuring point: Top of casing, 1.00 ft above land surface

REMARKS

Maryland Water-Level Network observation well

PERIOD OF RECORD

May 1982 to current year

EXTREMES FOR RECORD

Highest water level measured, 44.09 ft below land surface, May 14, 1998; lowest measured, 62.27 ft below land surface, Feb. 9, 1989

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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MO Cb 26

WELL NUMBER

MO Cb 26

SITE ID

391142077280601

LOCATION

Lat 39°11'42", long 77°28'06", Hydrologic Unit 02070008, 2 mi southwest of Dickerson, at Dickerson Regional Park

AQUIFER

Manassas Sandstone, Poolesville Member of Upper Triassic age

INSTRUMENTATION

Monthly measurements with electric steel tape by U.S. Geological Survey personnel

CHARACTERISTICS

Drilled, observation, artesian well, depth 885 ft; casing diameter 6 in., to 38 ft; open hole

DATUM

Elevation of land surface is 220 ft above sea level - measuring point: Top of casing 8.60 ft above land surface

REMARKS

Maryland Water-Level Network observation well

PERIOD OF RECORD

February 1991 to current year

EXTREMES FOR RECORD

Highest water level, flowing on Jan. 3, 1991, April 3, 1991, April 5, 1993, May 3, 1993, March 7, 1994, April 5, 1994, May 10, 1994, Jan. 29, 1996, Feb. 15, 1996, March 12, 1996, April 11, 1996, May 6, 1996,
June 5, 1996, July 2, 1996, Aug. 1, 1996, Oct. 10, 1996, Nov. 4, 1996, Dec. 3, 1996, Jan. 2, 1997, Feb. 3, 1997, March 13, 1997, April 10, 1997, Feb. 3, 1998, March 2, 1998, April 2, 1998, May 11, 1998, and April 13, 2000; lowest measured, 3.97 ft above land surface, Sept. 8, 1999.

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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MO Cc 14

WELL NUMBER

MO Cc 14

SITE ID

391314077224201

LOCATION

Lat 39°13´14", long 76°22´42", Hydrologic Unit 02070008, at Barnesville

AQUIFER

Ijamsville Formation of Paleozoic age

INSTRUMENTATION

Monthly measurements with electric tape by U.S. Geological Survey personnel.

CHARACTERISTICS

Dug, stone-lined, unused water-table well, depth 46 ft; casing diameter 60 to 24 in.

DATUM

Elevation of land surface is 560 ft above sea level, from topographic map. Measuring point: Top of wooden well cover, 3.00 ft avove land surface.

REMARKS

Maryland Water-Level Network observation well.

PERIOD OF RECORD

November 1952 to current year.

EXTREMES FOR RECORD

Highest water level measured, 18.00 ft below land surface, April 5, 1993; lowest measured, dry, on Dec. 2, 1957, Dec. 6, 1965, Jan. 3, 1966, Feb. 2, 1966.

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well
NOTE: October 2002 to current data are provisional and subject to change

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MO Ec 10

WELL NUMBER

MO Ec 10

SITE ID

390451077245901

LOCATION

Lat 39°04'51", long 77°24'59", Hydrologic Unit 02070008, 3 mi southeast of Poolesville nr Sycamore Landing Road at
McKee Besher Wildlife Management Area

AQUIFER

Balls Bluff Siltstone of Upper Triassic age

INSTRUMENTATION

Monthly measurements with electric tape by U.S. Geological Survey personnel

CHARACTERISTICS

Drilled, observation, artesian well, depth 855 ft; casing diameter 8 in., to 26 ft; open hole

DATUM

Elevation of land surface is 200 ft above sea level - measuring point: Top of casing, 1.70 ft above land surface

REMARKS

Maryland Water-Level Network observation well

PERIOD OF RECORD

September 1990 to current year

EXTREMES FOR RECORD

Highest water level measured, 4.70 ft below land surface, Jan. 29, 1996; lowest measured, 14.52 ft below land surface, July 8, 1992

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well *
NOTE: October 2002 to current data are provisional and subject to change

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MO Eh 20

WELL NAME

MO Eh 20

SITE ID

390434076573002

LOCATION

Lat 39°04´34", long 76°57´30", Hydrologic Unit 02070010, at MD Rt. 196 and Fairland Rd., Fairland

AQUIFER

Loch Raven Formation of Cambrian Age

INSTRUMENTATION

Monthly measurements with chalked steel tape by U.S. Geological Survey personnel.

CHARACTERISTICS

Drilled, unused, water-table well, depth 102.9 ft; casing diameter 6 in., to 50 ft; open hole.

DATUM

Elevation of land surface is 405 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of casing at land-surface datum.

REMARKS

Maryland Water-Level Network observation well.

PERIOD OF RECORD

March 1955 to current year.

EXTREMES FOR RECORD

Highest water level measured, 4.39 ft below land surface, June 25, 1972; lowest measured, 16.67 ft below land surface, Aug. 30, 1999.

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well
NOTE: October 2002 to current data are provisional and subject to change

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PG Bc 16

WELL NAME

PG Bc 16

SITE ID

390151076561501

LOCATION

Lat 39°01´51", long 76°56´15", Hydrologic Unit 02070010, at National Agricultural Research Center, Beltsville

AQUIFER

Patuxent Formation of Lower Cretaceous age

INSTRUMENTATION

Monthly measurements with electric tape by U.S. Geological Survey personnel. Equipped with water-level recorder from Oct. 31, 1962 to Feb. 9, 1965.

CHARACTERISTICS

Dug brick-lined, unused, water-table well, measured depth 27.4 ft; casing diameter 40 in.

DATUM

Elevation of land surface is 190 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of steel cover, 0.10 ft above land surface.

REMARKS

Maryland Water-Level Network observation well.

PERIOD OF RECORD

September 1962 to current year.

EXTREMES FOR RECORD

Highest water level measured, 17.26 ft below land surface, July 6, 1972; lowest measured, 26.46 ft below land surface, July 8, 1981.

COOPERATORS

Maryland Geological Survey

Download the data for the entire period of record for this well
NOTE: October 2002 to current data are provisional and subject to change

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