MD-DE-DC Water Science Center
The following continuous-record stations in Maryland, Delaware, and the District of Columbia are active. Included are streamflow gaging stations. Daily streamflow records (discharge) have been collected and published for the period of record, expressed in water years, shown for each station. Water Years are defined as the period October 1 through September 30. For example, the Water Year 2005 is defined as October 1, 2004 through September 30, 2005.
A list of discontinued stations can be found at
http://md.water.usgs.gov/data/sw_disc.html.
A list of active tidal-height gaging stations can be found at
http://md.water.usgs.gov/data/tide_active.html.
Drainage Period Station area of number (mi2) record
Delaware River: Shellpot Creek at Wilmington, DE ................01477800 7.46 1945-Present Christina River at Coochs Bridge, DE ............01478000 20.5 1943-Present White Clay Creek at Newark, DE ................01478650 69.0 1994-Present White Clay Creek near Newark, DE ..............01479000 89.1 1931-1936 1943-1957 1959-Present Red Clay Creek at Wooddale, DE ..............01480000 47.0 1943-Present Red Clay Creek near Stanton, DE .............01480015 52.4 1988-Present Brandywine Creek at Wilmington, DE ............01481500 314 1946-Present Wiggins Millpond Outlet (head of Appoquinimink River): Silver Lake tributary at Middletown, DE .......01483155 2001-Present Blackbird Creek at Blackbird, DE ................01483200 3.85 1956-Present
St. Jones River at Dover, DE ......................01483700 31.9 1958-Present
Beaverdam Branch (head of Mispillion River) at Houston, DE ................................01484100 2.83 1958-Present
Cow Bridge Branch (head of Indian River): Millsboro Pond Outlet at Millsboro, DE ..........01484525 66.0 1986-88 1991-Present Beaverdam Ditch nr Millville, DE ..................01484695 2.25 1998-Present
Birch Branch at Showell, MD .......................0148471320 6.38 2000-Present Bassett Creek near Ironshire, MD ..................01484719 1.22 2003-Present
Nassawango Creek near Snow Hill, MD .............01485500 44.9 1949-Present
Manokin Branch (head of Manokin River) near Princess Anne, MD ..........................01486000 4.80 1951-1971 1974-Present
Andrews Branch (head of Wicomico River): Beaverdam Creek near Salisbury, MD ..............01486500 19.5 1930-1932 1938-1975 2000-Present
Nanticoke River near Bridgeville, DE ..............01487000 75.4 1943-Present Marshyhope Creek near Adamsville, DE ............01488500 43.9 1943-1969 1971-2003 2005-Present
Transquaking River: Chicamacomico River near Salem, MD ..............01490000 15.0 1951-1980 2000-Present
Choptank River near Greensboro, MD ................01491000 113 1948-Present Tuckahoe Creek near Ruthsburg, MD ...............01491500 85.2 1951-1956 2000-Present
Wye River: Wye East River: Sallie Harris Creek near Carmichael, Md. ......01492500 8.09 1951-1956 2000-Present
Chester River: Unicorn Branch near Millington, MD ..............01493000 22.3 1948-Present Morgan Creek near Kennedyville, MD ..............01493500 12.7 1951-Present
Big Elk Creek (head of Elk River) at Elk Mills, MD ................................01495000 52.6 1932-Present
Susquehanna River at Conowingo, MD ................01578310 27,100 1967-Present Deer Creek at Rocks, MD .........................01580000 94.4 1926-Present Deer Creek near Darlington, MD ..................01580520 168 2000-Present
Bynum Run at Bel Air, MD ..........................01581500 8.52 1944-1951 1955-1970 1999-Present James Run near Belcamp. MD ........................01581649 9.15 2004-Present Otter Point Creek: Winters Run near Benson, MD .....................01581700 34.8 1967-Present Winters Run near Belair, MD .....................01581750 37.0 1988-Present* Plumtree Run near Belair, MD ....................01581752 2.50 2001-Present Otter Point Creek near Edgewood, MD .............01581757 55.6 2000-Present*
Gunpowder Falls (head of Gunpowder River): Gunpowder Falls at Hoffmanville, MD .............01581810 27.0 2000-Present Grave Run near Beckleysville, MD ................01581830 7.68 2000-Present Georges Run near Beckleysville, MD ..............01581870 15.8 2000-Present Gunpowder Falls near Parkton, MD ................01581920 81.5 2000-Present Mingo Branch near Hereford, MD ..................01581940 0.78 2000-Present Beetree Run at Bentley Springs, MD ..............01581960 9.72 2000-Present Little Falls at Blue Mount, MD ..................01582000 52.9 1944-Present Gunpowder Falls at Glencoe, MD ....................01582500 160 1982-Present Western Run: Piney Run at Dover, MD ........................01583100 12.3 1982-1988 1997-Present Western Run at Western Run, MD ..................01583500 59.8 1944-Present Beaverdam Run: Baisman Run: Pond Branch at Oregon Ridge, MD ...........01583570 0.16 1983-1986 1998-Present Baisman Run at Broadmoor, MD ..............01583580 1.47 1964-1969 1970-1976 (CSG) 1999-Present Beaverdam Run at Cockeysville, MD .............01583600 20.9 1982-Present Minebank Run near Glen Arm, MD ..................0158397967 2.06 2002-Present Minebank Run at Loch Raven, MD ..................01583980 2.90 1997-Present Long Green Creek at Glen Arm, MD ................01584050 9.40 1975-Present Little Gunpowder Falls at Laurel Brook, MD ......01584500 36.1 1927-1970 1999-Present Bird River: Whitemarsh Run (head of Bird River): Whitemarsh Run near Fullerton, MD .............01585090 2.73 1995-Present North Fork Whitemarsh Run near White Marsh, MD ......................01585095 1.34 1992-Present Whitemarsh Run at Whitemarsh, MD ..............01585100 7.61 1959-1989 1992-Present 01585104 Honeygo Run at White Marsh, MD ..............01585105 2.65 1990-1993 2000-Present
Herring Run (head of Back River): West Branch Herring Run at Idlewylde, MD ........01585200 2.13 1957-1965 1966-1987 1997-Present Moores Run: Moores Run tributary near Todd Avenue at Baltimore, MD ............................01585225 1996-Present Moores Run at Radecke Avenue at Baltimore, MD ...01585230 1996-Present
East Branch of North Branch Patapsco River: West Branch of North Branch Patapsco River: Cranberry Branch near Westminster, MD .........01585500 3.29 1949-Present North Branch Patapsco River at Cedarhurst, MD .....01586000 56.6 1945-Present Beaver Run near Finksburg, MD ...................01586210 14.0 1982-Present Morgan Run near Louisville, MD ..................01586610 28.0 1982-Present West Branch Herbert Run: East Branch Herbert Run at Arbutus, MD ........01589100 2.47 1957-1989 1999-Present Gwynns Falls at Glyndon, MD .....................01589180 0.23 1999-Present Gwynns Falls near Delight, MD ...................01589197 4.23 1999-Present Gwynns Falls tributary at McDonogh, MD ..........01589238 2000-Present Scotts Level Branch at Rockdale, MD ...........01589290 2006-Present Gwynns Falls at Villa Nova, MD ..................01589300 32.5 1957-1988 1997-Present Powder Mill Run near Lochearn, MD .............01589305 2006-Present Dead Run at Franklintown, MD ..................01589330 5.52 1960-1987 1998-Present Rognel Heights Storm Sewer Outfall at Baltimore, MD ..........................01589340 0.03 1999-Present Gwynns Falls at Washington Blvd. at Baltimore, MD ..............................01589352 1999-Present Jones Falls at Sorrento, MD .....................01589440 25.2 1966-1988 1997-Present Curtis Creek: Furnace Creek: Sawmill Creek at Glen Burnie, MD ............01589500 4.97 1944-1952 1983-Present
Severn Run (head of Severn River) South Fork Jabez Branch at Millersville, MD .....01589795 1.0 1989-1990 1997-Present
Patuxent River near Unity, MD .....................01591000 34.8 1944-Present Cattail Creek near Glenwood, MD .................01591400 22.9 1978-Present Patuxent River below Brighton Dam near Brighton, MD ...............................01591610 78.6 1980-Present Hawlings River near Sandy Spring, MD ............01591700 27.0 1978-Present Patuxent River near Laurel, MD ....................01592500 132 1944-Present Little Patuxent River at Guilford, MD ...........01593500 38.0 1932-Present Little Patuxent River at Savage, MD..............01594000 98.4 1939-1958 1975-1980 1985-Present Patuxent River near Bowie, MD .....................01594440 348 1977-Present Western Run at Upper Marlboro, MD ...............01594526 89.7 1985-1989 1992-Present
North Branch Potomac River: North Fork Sand Run near Wilson, MD .............01594936 1.91 1980-Present McMillan Fork near Ft. Pendelton, MD ............01594950 2.30 1986-Present North Branch Potomac River at Steyer, MD ..........01595000 73.0 1956-Present North Branch Potomac River at Kitzmiller, MD.......01595500 225 1950-1985 1986-Present* North Branch Potomac River at Barnum, WV ..........01595800 266 1966-1985 1986-Present* Savage River near Barton, MD ....................01596500 49.1 1948-Present Savage River below Savage River Dam near Bloomington, MD ..........................01597500 106 1948-Present North Branch Potomac River at Luke, MD ............01598500 404 1899-1906 1949-Present Georges Creek at Franklin, MD ...................01599000 72.4 1905-1906 1929-Present North Branch Potomac River at Pinto, MD ...........01600000 596 1939-1985 1986-Present* Wills Creek near Cumberland, MD .................01601500 247 1905-1906 1929-Present North Branch Potomac River near Cumberland, MD ....01603000 875 1929-Present Potomac River at Paw Paw, WV ......................01610000 3,129 1938-Present Sideling Hill Creek at Bellegrove, MD ...........01610155 102 1967-1977 1999-Present Tonoloway Creek near Hancock ....................01613095 111 2005-Present Potomac River at Hancock, MD ......................01613000 4,073 1932-Present Licking Creek near Pecktonville, MD .............01613525 2005-Present Conococheague Creek at Fairview, MD .............01614500 494 1928-Present Marsh Run at Grimes, MD .........................01617800 18.9 1963-Present Antietam Creek: Antietam Creek near Waynesboro, PA ..............01619000 93.5 1948-1951 1966-1981 2005-Present Antietam Creek near Sharpsburg, MD ..............01619500 281 1897-1905 1928-Present Catoctin Creek near Middletown, MD ..............01637500 66.9 1947-Present Potomac River at Point of Rocks, MD ...............01638500 9,651 1895-Present Monocacy River: Monocacy River at Bridgeport, MD ................01639000 173 1942-Present Big Pipe Creek (head of Double Pipe Creek) at Bruceville, MD ...........................01639500 102 1947-Present Monocacy River at Jug Bridge, near Frederick, MD ............................01643000 817 1929-Present Little Bennett Creek: Soper Branch at Hyattstown, MD ..............01643395 2004-Present Bennett Creek at Park Mills, MD ...............01643500 62.8 1948-1958 1966-Present Little Seneca Creek tributary near Clarksburg, MD ...........................01644368 2004-Present Little Seneca Creek tributary at Brink, MD ..................................01644370 2004-Present Little Seneca Creek tributary near Germantown, MD ...........................01644375 2004-Present Cabin Branch near Boyds, MD .....................01644380 2004-Present Great Seneca Creek near Quince Orchard, MD ......01644600 50.7 1997-Present Seneca Creek at Dawsonville, MD .................01645000 101 1930-Present Potomac River at Washington, DC ...................01646500 11,560 1930-Present Rock Creek at Sherrill Drive, Washington, DC ....01648000 62.2 1929-Present Northeast Branch Anacostia River (head of Anacostia River) at Riverdale, MD .............01649500 72.8 1938-Present Northwest Branch Anacostia River near Colesville, MD .......................01650500 21.1 1924-1983 1997-Present Northwest Branch Anacostia River near Hyattsville, MD ........................01651000 49.4 1938-Present Watts Branch at Washington, DC ................01651800 3.28 1992-Present Piscataway Creek at Piscataway, MD ..............01653600 39.5 1965-Present Mattawoman Creek near Pomonkey, MD ..............01658000 54.8 2000-Present Zekiah Swamp (head of Wicomico River) near Newtown MD ...............................01660920 79.9 1983-Present St. Clement Creek (head of St. Clement Bay) near Clements, MD .............................01661050 18.5 1968-Present St. Marys River at Great Mills, MD ..............01661500 24.0 1946-Present
Monongahela River: Youghiogheny River near Oakland, MD .............03075500 134 1941-Present Youghiogheny River at Friendsville, MD ..........03076500 295 1898-1904 1940-Present Bear Creek at Friendsville, MD ................03076600 48.9 1964-Present Casselman River at Grantsville, MD ............03078000 62.5 1947-Present
CSG Operated as Crest-Stage Gage (flood height) for period other than during continuous record; crest-stage only and other partial-record stations are not included in this listing. * Indicates that records have not been published for the dates indicated. TBD To be determined.
List of discontinued surface-water discharge stations.
List of active tidal-height gaging stations.